From 820f787c7cd84c1a3119e024d1d24731d762d37a Mon Sep 17 00:00:00 2001
From: Pooja Bhagat <pooja.bhagat@glean.com>
Date: Mon, 29 Dec 2025 14:29:37 +0530
Subject: [PATCH 1/2] Working metrics export

---
 README.md                                     |  25 +
 WORKSPACE                                     |   1 +
 maven_install.json                            | 734 +++++++++++++++++-
 pom.xml                                       |  12 +
 src/main/java/com/glean/proxy/BUILD.bazel     |   1 +
 .../com/glean/proxy/FilterConfiguration.java  |  10 +-
 .../java/com/glean/proxy/ProxyNetworking.java |  35 +
 .../java/com/glean/proxy/filters/BUILD.bazel  |   1 +
 .../glean/proxy/filters/CompositeFilter.java  |  12 +
 .../proxy/filters/ProxyMetricsFilter.java     |  48 ++
 .../java/com/glean/proxy/metrics/BUILD.bazel  |  16 +
 .../com/glean/proxy/metrics/MetricData.java   | 151 ++++
 .../com/glean/proxy/metrics/ProxyMetrics.java |  38 +
 .../proxy/metrics/ProxyMetricsExporter.java   | 278 +++++++
 14 files changed, 1349 insertions(+), 13 deletions(-)
 create mode 100644 src/main/java/com/glean/proxy/filters/ProxyMetricsFilter.java
 create mode 100644 src/main/java/com/glean/proxy/metrics/BUILD.bazel
 create mode 100644 src/main/java/com/glean/proxy/metrics/MetricData.java
 create mode 100644 src/main/java/com/glean/proxy/metrics/ProxyMetrics.java
 create mode 100644 src/main/java/com/glean/proxy/metrics/ProxyMetricsExporter.java

diff --git a/README.md b/README.md
index 5d80253..923ef4d 100644
--- a/README.md
+++ b/README.md
@@ -79,6 +79,13 @@ GleanProxy is configured through environment variables. By default, the set of f
 |---------------------|-------------|---------|
 | `CLOUD_PLATFORM` | Cloud platform (`AWS` or `GOOGLE`) | None |
 
+### Metrics Configuration
+
+| Variable | Description | Default |
+|---------------------|-------------|---------|
+| `GCP_PROJECT_ID` | GCP project ID for Stackdriver metrics export | None |
+| `ENABLE_METRICS_EXPORT` | Enable/disable metrics export to Stackdriver (true/false) | Enabled if `GCP_PROJECT_ID` is set |
+
 ### Filter Configuration Variables
 
 | Variable | Description | Default |
@@ -178,6 +185,24 @@ curl localhost:8080/liveness_check
 curl --proxy localhost:8080 https://www.glean.com
 ```
 
+### Running with Metrics Export
+
+To export metrics to GCP Cloud Monitoring (Stackdriver):
+
+```bash
+export CLOUD_PLATFORM=GOOGLE
+export GCP_PROJECT_ID=your-gcp-project-id
+export GOOGLE_APPLICATION_CREDENTIALS=/path/to/service-account-key.json
+
+bazel run //src/main/java/com/glean/proxy:ProxyMain 8080
+```
+
+Metrics are exported every 60 seconds and include:
+- `proxy/request_count` - Total number of requests (labeled by status_code, method)
+- `proxy/request_latency` - Request latency distribution in milliseconds (labeled by status_code, method)
+
+To run locally without exporting metrics, omit `GCP_PROJECT_ID` or set `ENABLE_METRICS_EXPORT=false`.
+
 ## Contributing
 
 Please see [CONTRIBUTING.md](CONTRIBUTING.md) for development setup and guidelines.
diff --git a/WORKSPACE b/WORKSPACE
index b6dfe0f..4f85147 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -199,6 +199,7 @@ maven_install(
         # This was downgraded, so we can keep netty at 4.1.*
         "io.github.littleproxy:littleproxy:2.4.0",
         "io.netty:netty-codec-http:4.1.127.Final",
+        "com.google.cloud:google-cloud-monitoring:3.52.0",
         "org.apache.httpcomponents:httpclient:4.5.14",
         "com.uber.nullaway:nullaway:0.10.9",
         "org.mockito:mockito-core:5.12.0",
diff --git a/maven_install.json b/maven_install.json
index 9a26ba3..db0df54 100755
--- a/maven_install.json
+++ b/maven_install.json
@@ -1,8 +1,81 @@
 {
   "__AUTOGENERATED_FILE_DO_NOT_MODIFY_THIS_FILE_MANUALLY": "THERE_IS_NO_DATA_ONLY_ZUUL",
-  "__INPUT_ARTIFACTS_HASH": -610273456,
-  "__RESOLVED_ARTIFACTS_HASH": -747619382,
+  "__INPUT_ARTIFACTS_HASH": 1879168519,
+  "__RESOLVED_ARTIFACTS_HASH": 833789247,
+  "conflict_resolution": {
+    "com.google.code.gson:gson:2.10.1": "com.google.code.gson:gson:2.11.0"
+  },
   "artifacts": {
+    "com.google.android:annotations": {
+      "shasums": {
+        "jar": "ba734e1e84c09d615af6a09d33034b4f0442f8772dec120efb376d86a565ae15",
+        "sources": "e9b667aa958df78ea1ad115f7bbac18a5869c3128b1d5043feb360b0cfce9d40"
+      },
+      "version": "4.1.1.4"
+    },
+    "com.google.api.grpc:proto-google-cloud-monitoring-v3": {
+      "shasums": {
+        "jar": "8238b3216aa59ffeed9a157833d7fcc844a7dc9f101b23d728f1cdec6c5c3ba2",
+        "sources": "2d4bf6619df590be4904c3e7dfe763b32f559dd53251211e0a64f708c0ddff6b"
+      },
+      "version": "3.52.0"
+    },
+    "com.google.api.grpc:proto-google-common-protos": {
+      "shasums": {
+        "jar": "8b67033e6419b3810f2ee5afbb80ea2b34f1c3baa4e8f9e5b630320fb3607039",
+        "sources": "a4238ae00a7f482df3f1a54e989bdbddd66507f8ad66c4c1809b6e89983c531b"
+      },
+      "version": "2.45.1"
+    },
+    "com.google.api:api-common": {
+      "shasums": {
+        "jar": "429a441ae9b709e3e04e708efe91aaaecc24d1e6252595fbbaa7f9a2f05f992a",
+        "sources": "1ca3dedc720ac9aa2e4c7fff20bd3fc24c222feccc8fced8cf32fd120a61529d"
+      },
+      "version": "2.37.1"
+    },
+    "com.google.api:gax": {
+      "shasums": {
+        "jar": "dd0f83c3a98557f8c88d7803a1365554d28709c0e1623a2f6644f2301ff976c1",
+        "sources": "b1a1ea40614421caa891ab2824745ee4da96ae1c9e663c35e6e92903998dc71d"
+      },
+      "version": "2.54.1"
+    },
+    "com.google.api:gax-grpc": {
+      "shasums": {
+        "jar": "cedb1c2b224560cb005b30a75617dda9832d4efe206d873aadff6e8667dc1f02",
+        "sources": "afdf9cb9771cc566b5df1ebf95e2a00e25c6ee1ae476009e90293402d798de61"
+      },
+      "version": "2.54.1"
+    },
+    "com.google.auth:google-auth-library-credentials": {
+      "shasums": {
+        "jar": "e4717df3f5ea5b9f910ddb173d42d887c26be5ee76e58c5e3951b2f638ce74e2",
+        "sources": "ee767a413b5c852575075e18f1ca745b15048fb3853e196d3cc545ebb9d06e23"
+      },
+      "version": "1.27.0"
+    },
+    "com.google.auth:google-auth-library-oauth2-http": {
+      "shasums": {
+        "jar": "34887235c78c9221e1d95f1b4117b0bb81a0a5ef7b9e67bf005f19d73a8f74b8",
+        "sources": "5f3bfb2d9a1ed8fb21ed7d59282ba257596fe64188de1a6b28a31795d264614a"
+      },
+      "version": "1.27.0"
+    },
+    "com.google.auto.value:auto-value-annotations": {
+      "shasums": {
+        "jar": "5a055ce4255333b3346e1a8703da5bf8ff049532286fdcd31712d624abe111dd",
+        "sources": "d7941e5f19bb38afcfa85350d57e5245856c23c98c2bbe32f6d31b5577f2bc33"
+      },
+      "version": "1.11.0"
+    },
+    "com.google.cloud:google-cloud-monitoring": {
+      "shasums": {
+        "jar": "9727aa7d94d8dd036bffccf9abc5d18970b1e5e9827896f9907f7450ed10f5e6",
+        "sources": "5671d4d59e5d22f4a4905d1cb1e8425c89860b30bbb49a9d8730bffb3b78a503"
+      },
+      "version": "3.52.0"
+    },
     "com.google.code.findbugs:jsr305": {
       "shasums": {
         "jar": "766ad2a0783f2687962c8ad74ceecc38a28b9f72a2d085ee438b7813e928d0c7",
@@ -12,10 +85,10 @@
     },
     "com.google.code.gson:gson": {
       "shasums": {
-        "jar": "4241c14a7727c34feea6507ec801318a3d4a90f070e4525681079fb94ee4c593",
-        "sources": "eee1cc5c1f4267ee194cc245777e68084738ef390acd763354ce0ff6bfb7bcc1"
+        "jar": "57928d6e5a6edeb2abd3770a8f95ba44dce45f3b23b7a9dc2b309c581552a78b",
+        "sources": "49a853f71bc874ee1898a4ad5009b57d0c536e5a998b3890253ffbf4b7276ad3"
       },
-      "version": "2.10.1"
+      "version": "2.11.0"
     },
     "com.google.errorprone:error_prone_annotations": {
       "shasums": {
@@ -45,6 +118,20 @@
       },
       "version": "9999.0-empty-to-avoid-conflict-with-guava"
     },
+    "com.google.http-client:google-http-client": {
+      "shasums": {
+        "jar": "8340bbaf4410bd25921842e424cac3db9c916fdf47adfe73b8cba8dba7a06103",
+        "sources": "638c13eeffbef4bdb551d705f32885cb87247fa41d2e59754d05b131550a7681"
+      },
+      "version": "1.45.0"
+    },
+    "com.google.http-client:google-http-client-gson": {
+      "shasums": {
+        "jar": "44dc1da1b7914fe7df306ac79e8c04d879cbfcb2e6afc8eb106ecf0be9dce96e",
+        "sources": "faebaf26ab46243ad007fa4c9f569bc5f301dca615f3e58ede2d5aebdbd11852"
+      },
+      "version": "1.45.0"
+    },
     "com.google.j2objc:j2objc-annotations": {
       "shasums": {
         "jar": "88241573467ddca44ffd4d74aa04c2bbfd11bf7c17e0c342c94c9de7a70a7c64",
@@ -52,6 +139,27 @@
       },
       "version": "3.0.0"
     },
+    "com.google.protobuf:protobuf-java": {
+      "shasums": {
+        "jar": "8540247fad9e06baefa8fb45eb313802d019f485f14300e0f9d6b556ed88e753",
+        "sources": "d686e802329e42954e72e9b3b148b67eeb4f6f3ed327abc4508b79fda4937c3b"
+      },
+      "version": "3.25.5"
+    },
+    "com.google.protobuf:protobuf-java-util": {
+      "shasums": {
+        "jar": "dacc58b2c3d2fa8d4bddc1acb881e78d6cf7c137dd78bc1d67f6aca732436a8d",
+        "sources": "db5bda981edcda1fd4d60bf4cc7dca9ab144f6b880233fd4d1582fd0065f232c"
+      },
+      "version": "3.25.5"
+    },
+    "com.google.re2j:re2j": {
+      "shasums": {
+        "jar": "4f657af51ab8bb0909bcc3eb40862d26125af8cbcf92aaaba595fed77f947bc0",
+        "sources": "ddc3b47bb1e556ac4c0d02c9d8ff18f3260198b76b720567a70eed0a03d3fed6"
+      },
+      "version": "1.7"
+    },
     "com.uber.nullaway:nullaway": {
       "shasums": {
         "jar": "38327fd62ceb0683881d68ee7bf97598133f0287f3c670416f50f85cf8ef418b",
@@ -61,10 +169,10 @@
     },
     "commons-codec:commons-codec": {
       "shasums": {
-        "jar": "e599d5318e97aa48f42136a2927e6dfa4e8881dff0e6c8e3109ddbbff51d7b7d",
-        "sources": "901cb5d1f7c2877017c95d3c5efd5a497738d0162ef72cdf58e9cb13f50b2e9c"
+        "jar": "f9f6cb103f2ddc3c99a9d80ada2ae7bf0685111fd6bffccb72033d1da4e6ff23",
+        "sources": "2283aff7f425dff23ebdb7a8fc0f03ae21b4ced7a43aacba47cedae126dc5d4a"
       },
-      "version": "1.11"
+      "version": "1.17.1"
     },
     "commons-logging:commons-logging": {
       "shasums": {
@@ -80,6 +188,111 @@
       },
       "version": "2.4.0"
     },
+    "io.grpc:grpc-alts": {
+      "shasums": {
+        "jar": "91bf6e78af5d0edae98857a798e47aa0789159774009a64125d46def9aabcbf8",
+        "sources": "b68f9c241d7786c88472a95e31547b8553832ad8e5d54a5a3699e45cdc598bf9"
+      },
+      "version": "1.68.0"
+    },
+    "io.grpc:grpc-api": {
+      "shasums": {
+        "jar": "b5120a11da5ce5ddfab019bbb69f5868529c9b5def1ba5b283251cc95fb3ba91",
+        "sources": "3e4b31496f2c8b7cd51b425af767c72d44b38fdbb56a6e8c247acb8a721c4e8c"
+      },
+      "version": "1.68.0"
+    },
+    "io.grpc:grpc-auth": {
+      "shasums": {
+        "jar": "f686aa689d39175e6ef6cf3dc207df43552653fed7912cfb6c2d31866349d28b",
+        "sources": "472a101cd3c3aeac559d7cf4a43bb5c3cbee02a7531883844c2108d30ef1f366"
+      },
+      "version": "1.68.0"
+    },
+    "io.grpc:grpc-context": {
+      "shasums": {
+        "jar": "45f85a394466f963f1f7a5c5555e6dda35efd05ce1c687203a217d7048f6f089",
+        "sources": "31d4fc1054b5c0bc75924e82ca425dcf624f895e7525da900b94cfa87a2bea53"
+      },
+      "version": "1.68.0"
+    },
+    "io.grpc:grpc-core": {
+      "shasums": {
+        "jar": "a8dd684c322ba8a86a95b2653fa4106c918a56edd863e45aaf63839d6a6ea082",
+        "sources": "38838e62fbc22a78d40f4214da2e638f60d32e3b67ff7daab35d619d7538beb0"
+      },
+      "version": "1.68.0"
+    },
+    "io.grpc:grpc-googleapis": {
+      "shasums": {
+        "jar": "20359d482402ea24de696b94ee27293d3af746fec9dbb479b88d750c57c2397b",
+        "sources": "e2e87539687f2d790e154c6204d7409d6f29a42674e21f4c9b7c4991620305bd"
+      },
+      "version": "1.68.0"
+    },
+    "io.grpc:grpc-grpclb": {
+      "shasums": {
+        "jar": "13a2f7d7c50ef4dc5f3744c0f75341b0c64a2a6dcb2449f8a2089c5ed013751d",
+        "sources": "488540b83dbb7865de7ae778edbf062cbafbb61e6bbf4b13fd86a4890cefb0e2"
+      },
+      "version": "1.68.0"
+    },
+    "io.grpc:grpc-inprocess": {
+      "shasums": {
+        "jar": "11d3649382bf7780a868e129965b929bdb6efcc3de2ef6f629141e79a0366b53",
+        "sources": "327f4e93e1dd92fd4d1920ee26adfb95f8867374b2fa728332a86c8c78f1ae84"
+      },
+      "version": "1.68.0"
+    },
+    "io.grpc:grpc-netty-shaded": {
+      "shasums": {
+        "jar": "de6fd10fef856dbb83ecbd0baee5313a274bb8202adca01091161024e25fd1dc",
+        "sources": "31d4fc1054b5c0bc75924e82ca425dcf624f895e7525da900b94cfa87a2bea53"
+      },
+      "version": "1.68.0"
+    },
+    "io.grpc:grpc-protobuf": {
+      "shasums": {
+        "jar": "79704cf169ee27151fce4375a4d91fe828d276d921eef5a7f497d020b0a5d345",
+        "sources": "dafd411f98051013a6f37b9f60f9f25e4bdb9a69644f7eec64dd0fbfedc8dd0c"
+      },
+      "version": "1.68.0"
+    },
+    "io.grpc:grpc-protobuf-lite": {
+      "shasums": {
+        "jar": "60e92e148b4f86c06885afa79a86beb74bffcdcba47f8b65dc7010ba6701fa80",
+        "sources": "ae4dfe070f6832dfdce73c3ea093b68165c851d879f9185c55e741b98fef4042"
+      },
+      "version": "1.68.0"
+    },
+    "io.grpc:grpc-services": {
+      "shasums": {
+        "jar": "2d3e6911bfec8a20af982a4c14d2bca5bdb1c079af250fb778bc71950c611c15",
+        "sources": "062e07eb635df35fbb84e98e1dc5bec44dbe7c224b73a37a2de483f41fabc254"
+      },
+      "version": "1.68.0"
+    },
+    "io.grpc:grpc-stub": {
+      "shasums": {
+        "jar": "7c4090509cd6ea0432305f9397da21127b691905bdcf163a306bedb1c6f4ead7",
+        "sources": "4d4046adfc05f2d738cf67fd95275e59c3def5aa77d99596393b9d7d34fc29b1"
+      },
+      "version": "1.68.0"
+    },
+    "io.grpc:grpc-util": {
+      "shasums": {
+        "jar": "a97484519d75a6f530b95eab7723318752b2c5febca11fc9141dd78bd09e7eda",
+        "sources": "516a0590c868c8c46175acdd4a01c7f5d42b12aafacb9aefeb195fa935d9442c"
+      },
+      "version": "1.68.0"
+    },
+    "io.grpc:grpc-xds": {
+      "shasums": {
+        "jar": "bcfabb73ba1ab3ea44283c88ed0c8fcdcaa9bdbd54b8fb0cd9faa19388a47f9d",
+        "sources": "5d3c2392eada53d3fd6b7ff167f2e66ed18b8d616477cd84842e501bbb9a338f"
+      },
+      "version": "1.68.0"
+    },
     "io.netty:netty-all": {
       "shasums": {
         "jar": "230fdaa7d53002efb7dc08d4666a999b488858671eaa04357326b66e50b5c0e9",
@@ -301,6 +514,34 @@
       },
       "version": "4.1.116.Final"
     },
+    "io.opencensus:opencensus-api": {
+      "shasums": {
+        "jar": "f1474d47f4b6b001558ad27b952e35eda5cc7146788877fc52938c6eba24b382",
+        "sources": "6748d57aaae81995514ad3e2fb11a95aa88e158b3f93450288018eaccf31e86b"
+      },
+      "version": "0.31.1"
+    },
+    "io.opencensus:opencensus-contrib-http-util": {
+      "shasums": {
+        "jar": "3ea995b55a4068be22989b70cc29a4d788c2d328d1d50613a7a9afd13fdd2d0a",
+        "sources": "d55afd5f96dc724bd903a77a38b0a344d0e59f02a64b9ab2f32618bc582ea924"
+      },
+      "version": "0.31.1"
+    },
+    "io.perfmark:perfmark-api": {
+      "shasums": {
+        "jar": "c7b478503ec524e55df19b424d46d27c8a68aeb801664fadd4f069b71f52d0f6",
+        "sources": "311551ab29cf51e5a8abee6a019e88dee47d1ea71deb9fcd3649db9c51b237bc"
+      },
+      "version": "0.27.0"
+    },
+    "javax.annotation:javax.annotation-api": {
+      "shasums": {
+        "jar": "e04ba5195bcd555dc95650f7cc614d151e4bcd52d29a10b8aa2197f3ab89ab9b",
+        "sources": "128971e52e0d84a66e3b6e049dab8ad7b2c58b7e1ad37fa2debd3d40c2947b95"
+      },
+      "version": "1.3.2"
+    },
     "net.bytebuddy:byte-buddy": {
       "shasums": {
         "jar": "7472e3961992c12a9fd4f6d67c21de4280abe18f292704dd49d7338289f8acf5",
@@ -345,10 +586,10 @@
     },
     "org.checkerframework:checker-qual": {
       "shasums": {
-        "jar": "3fbc2e98f05854c3df16df9abaa955b91b15b3ecac33623208ed6424640ef0f6",
-        "sources": "d6bdee58964cd05aabfca4e44947d3cbdada6bf617ed618b62b3b0d5a21de339"
+        "jar": "9840a77c175a95a60c66da8f506871a907a6c4fc8a703bef38c715bc6d4de626",
+        "sources": "3b6277f0186e31f775c205cfe165f0fe98995e83108b15314e7a4cb93e3f9c96"
       },
-      "version": "3.43.0"
+      "version": "3.47.0"
     },
     "org.checkerframework:dataflow-nullaway": {
       "shasums": {
@@ -357,6 +598,20 @@
       },
       "version": "3.26.0"
     },
+    "org.codehaus.mojo:animal-sniffer-annotations": {
+      "shasums": {
+        "jar": "c720e6e5bcbe6b2f48ded75a47bccdb763eede79d14330102e0d352e3d89ed92",
+        "sources": "4270ce5531ed0f12e4234e08f240ef3b45ee3ceeb16e28d44abc61c12cf522ca"
+      },
+      "version": "1.24"
+    },
+    "org.conscrypt:conscrypt-openjdk-uber": {
+      "shasums": {
+        "jar": "eaf537d98e033d0f0451cd1b8cc74e02d7b55ec882da63c88060d806ba89c348",
+        "sources": "aa1d02e65351e202e83ece0614bce1022aa1da6e77313ef7c7663ab45fa9e3a5"
+      },
+      "version": "2.5.2"
+    },
     "org.mockito:mockito-core": {
       "shasums": {
         "jar": "4a2eb29237050da749e90a46f948bce7e26ec22b671e41f59b1ac6f4b6408229",
@@ -384,9 +639,78 @@
         "sources": "8bd6a94a7f610ea9f0180f8b6832bd8b4398f123bea8ad8febe00c36c49e1d1e"
       },
       "version": "2.0.13"
+    },
+    "org.threeten:threetenbp": {
+      "shasums": {
+        "jar": "857917d2319a4e92dc1c5e3aeb75a0dac84445ed315e7ac3d82bb8d2b298977f",
+        "sources": "b4d3602a948a10ea275991d4144c3cbbd9b9000bd3b58dfc7b74b240688ca4a9"
+      },
+      "version": "1.7.0"
     }
   },
   "dependencies": {
+    "com.google.api.grpc:proto-google-cloud-monitoring-v3": [
+      "com.google.auto.value:auto-value-annotations",
+      "com.google.code.findbugs:jsr305",
+      "com.google.errorprone:error_prone_annotations",
+      "com.google.guava:failureaccess",
+      "com.google.guava:listenablefuture",
+      "com.google.j2objc:j2objc-annotations",
+      "javax.annotation:javax.annotation-api",
+      "org.checkerframework:checker-qual"
+    ],
+    "com.google.cloud:google-cloud-monitoring": [
+      "com.google.android:annotations",
+      "com.google.api.grpc:proto-google-cloud-monitoring-v3",
+      "com.google.api.grpc:proto-google-common-protos",
+      "com.google.api:api-common",
+      "com.google.api:gax",
+      "com.google.api:gax-grpc",
+      "com.google.auth:google-auth-library-credentials",
+      "com.google.auth:google-auth-library-oauth2-http",
+      "com.google.auto.value:auto-value-annotations",
+      "com.google.code.findbugs:jsr305",
+      "com.google.code.gson:gson",
+      "com.google.errorprone:error_prone_annotations",
+      "com.google.guava:failureaccess",
+      "com.google.guava:guava",
+      "com.google.guava:listenablefuture",
+      "com.google.http-client:google-http-client",
+      "com.google.http-client:google-http-client-gson",
+      "com.google.j2objc:j2objc-annotations",
+      "com.google.protobuf:protobuf-java",
+      "com.google.protobuf:protobuf-java-util",
+      "com.google.re2j:re2j",
+      "commons-codec:commons-codec",
+      "io.grpc:grpc-alts",
+      "io.grpc:grpc-api",
+      "io.grpc:grpc-auth",
+      "io.grpc:grpc-context",
+      "io.grpc:grpc-core",
+      "io.grpc:grpc-googleapis",
+      "io.grpc:grpc-grpclb",
+      "io.grpc:grpc-inprocess",
+      "io.grpc:grpc-netty-shaded",
+      "io.grpc:grpc-protobuf",
+      "io.grpc:grpc-protobuf-lite",
+      "io.grpc:grpc-services",
+      "io.grpc:grpc-stub",
+      "io.grpc:grpc-util",
+      "io.grpc:grpc-xds",
+      "io.opencensus:opencensus-api",
+      "io.opencensus:opencensus-contrib-http-util",
+      "io.perfmark:perfmark-api",
+      "javax.annotation:javax.annotation-api",
+      "org.apache.httpcomponents:httpclient",
+      "org.apache.httpcomponents:httpcore",
+      "org.checkerframework:checker-qual",
+      "org.codehaus.mojo:animal-sniffer-annotations",
+      "org.conscrypt:conscrypt-openjdk-uber",
+      "org.threeten:threetenbp"
+    ],
+    "com.google.code.gson:gson": [
+      "com.google.errorprone:error_prone_annotations"
+    ],
     "com.google.guava:guava": [
       "com.google.errorprone:error_prone_annotations",
       "com.google.guava:failureaccess",
@@ -571,6 +895,67 @@
     "io.netty:netty-all:jar:sources"
   ],
   "packages": {
+    "com.google.android:annotations": [
+      "android.annotation"
+    ],
+    "com.google.api.grpc:proto-google-cloud-monitoring-v3": [
+      "com.google.monitoring.v3"
+    ],
+    "com.google.api.grpc:proto-google-common-protos": [
+      "com.google.api",
+      "com.google.apps.card.v1",
+      "com.google.cloud",
+      "com.google.cloud.audit",
+      "com.google.cloud.location",
+      "com.google.geo.type",
+      "com.google.logging.type",
+      "com.google.longrunning",
+      "com.google.rpc",
+      "com.google.rpc.context",
+      "com.google.shopping.type",
+      "com.google.type"
+    ],
+    "com.google.api:api-common": [
+      "com.google.api.core",
+      "com.google.api.pathtemplate",
+      "com.google.api.resourcenames"
+    ],
+    "com.google.api:gax": [
+      "com.google.api.gax.batching",
+      "com.google.api.gax.core",
+      "com.google.api.gax.longrunning",
+      "com.google.api.gax.nativeimage",
+      "com.google.api.gax.paging",
+      "com.google.api.gax.retrying",
+      "com.google.api.gax.rpc",
+      "com.google.api.gax.rpc.internal",
+      "com.google.api.gax.rpc.mtls",
+      "com.google.api.gax.tracing",
+      "com.google.api.gax.util"
+    ],
+    "com.google.api:gax-grpc": [
+      "com.google.api.gax.grpc",
+      "com.google.api.gax.grpc.nativeimage",
+      "com.google.longrunning",
+      "com.google.longrunning.stub"
+    ],
+    "com.google.auth:google-auth-library-credentials": [
+      "com.google.auth"
+    ],
+    "com.google.auth:google-auth-library-oauth2-http": [
+      "com.google.auth.http",
+      "com.google.auth.oauth2"
+    ],
+    "com.google.auto.value:auto-value-annotations": [
+      "com.google.auto.value",
+      "com.google.auto.value.extension.memoized",
+      "com.google.auto.value.extension.serializable",
+      "com.google.auto.value.extension.toprettystring"
+    ],
+    "com.google.cloud:google-cloud-monitoring": [
+      "com.google.cloud.monitoring.v3",
+      "com.google.cloud.monitoring.v3.stub"
+    ],
     "com.google.code.findbugs:jsr305": [
       "javax.annotation",
       "javax.annotation.concurrent",
@@ -614,9 +999,40 @@
       "com.google.common.xml",
       "com.google.thirdparty.publicsuffix"
     ],
+    "com.google.http-client:google-http-client": [
+      "com.google.api.client.http",
+      "com.google.api.client.http.apache",
+      "com.google.api.client.http.javanet",
+      "com.google.api.client.http.json",
+      "com.google.api.client.json",
+      "com.google.api.client.json.rpc2",
+      "com.google.api.client.json.webtoken",
+      "com.google.api.client.testing.http",
+      "com.google.api.client.testing.http.apache",
+      "com.google.api.client.testing.http.javanet",
+      "com.google.api.client.testing.json",
+      "com.google.api.client.testing.json.webtoken",
+      "com.google.api.client.testing.util",
+      "com.google.api.client.util",
+      "com.google.api.client.util.escape",
+      "com.google.api.client.util.store"
+    ],
+    "com.google.http-client:google-http-client-gson": [
+      "com.google.api.client.json.gson"
+    ],
     "com.google.j2objc:j2objc-annotations": [
       "com.google.j2objc.annotations"
     ],
+    "com.google.protobuf:protobuf-java": [
+      "com.google.protobuf",
+      "com.google.protobuf.compiler"
+    ],
+    "com.google.protobuf:protobuf-java-util": [
+      "com.google.protobuf.util"
+    ],
+    "com.google.re2j:re2j": [
+      "com.google.re2j"
+    ],
     "com.uber.nullaway:nullaway": [
       "com.uber.nullaway",
       "com.uber.nullaway.annotations",
@@ -650,6 +1066,178 @@
       "org.littleshoot.proxy.extras",
       "org.littleshoot.proxy.impl"
     ],
+    "io.grpc:grpc-alts": [
+      "io.grpc.alts",
+      "io.grpc.alts.internal"
+    ],
+    "io.grpc:grpc-api": [
+      "io.grpc"
+    ],
+    "io.grpc:grpc-auth": [
+      "io.grpc.auth"
+    ],
+    "io.grpc:grpc-core": [
+      "io.grpc.internal"
+    ],
+    "io.grpc:grpc-googleapis": [
+      "io.grpc.googleapis"
+    ],
+    "io.grpc:grpc-grpclb": [
+      "io.grpc.grpclb",
+      "io.grpc.lb.v1"
+    ],
+    "io.grpc:grpc-inprocess": [
+      "io.grpc.inprocess"
+    ],
+    "io.grpc:grpc-netty-shaded": [
+      "io.grpc.netty.shaded.io.grpc.netty",
+      "io.grpc.netty.shaded.io.netty.bootstrap",
+      "io.grpc.netty.shaded.io.netty.buffer",
+      "io.grpc.netty.shaded.io.netty.buffer.search",
+      "io.grpc.netty.shaded.io.netty.channel",
+      "io.grpc.netty.shaded.io.netty.channel.embedded",
+      "io.grpc.netty.shaded.io.netty.channel.epoll",
+      "io.grpc.netty.shaded.io.netty.channel.group",
+      "io.grpc.netty.shaded.io.netty.channel.internal",
+      "io.grpc.netty.shaded.io.netty.channel.local",
+      "io.grpc.netty.shaded.io.netty.channel.nio",
+      "io.grpc.netty.shaded.io.netty.channel.oio",
+      "io.grpc.netty.shaded.io.netty.channel.pool",
+      "io.grpc.netty.shaded.io.netty.channel.socket",
+      "io.grpc.netty.shaded.io.netty.channel.socket.nio",
+      "io.grpc.netty.shaded.io.netty.channel.socket.oio",
+      "io.grpc.netty.shaded.io.netty.channel.unix",
+      "io.grpc.netty.shaded.io.netty.handler.address",
+      "io.grpc.netty.shaded.io.netty.handler.codec",
+      "io.grpc.netty.shaded.io.netty.handler.codec.base64",
+      "io.grpc.netty.shaded.io.netty.handler.codec.bytes",
+      "io.grpc.netty.shaded.io.netty.handler.codec.compression",
+      "io.grpc.netty.shaded.io.netty.handler.codec.http",
+      "io.grpc.netty.shaded.io.netty.handler.codec.http.cookie",
+      "io.grpc.netty.shaded.io.netty.handler.codec.http.cors",
+      "io.grpc.netty.shaded.io.netty.handler.codec.http.multipart",
+      "io.grpc.netty.shaded.io.netty.handler.codec.http.websocketx",
+      "io.grpc.netty.shaded.io.netty.handler.codec.http.websocketx.extensions",
+      "io.grpc.netty.shaded.io.netty.handler.codec.http.websocketx.extensions.compression",
+      "io.grpc.netty.shaded.io.netty.handler.codec.http2",
+      "io.grpc.netty.shaded.io.netty.handler.codec.json",
+      "io.grpc.netty.shaded.io.netty.handler.codec.marshalling",
+      "io.grpc.netty.shaded.io.netty.handler.codec.protobuf",
+      "io.grpc.netty.shaded.io.netty.handler.codec.rtsp",
+      "io.grpc.netty.shaded.io.netty.handler.codec.serialization",
+      "io.grpc.netty.shaded.io.netty.handler.codec.socks",
+      "io.grpc.netty.shaded.io.netty.handler.codec.socksx",
+      "io.grpc.netty.shaded.io.netty.handler.codec.socksx.v4",
+      "io.grpc.netty.shaded.io.netty.handler.codec.socksx.v5",
+      "io.grpc.netty.shaded.io.netty.handler.codec.spdy",
+      "io.grpc.netty.shaded.io.netty.handler.codec.string",
+      "io.grpc.netty.shaded.io.netty.handler.codec.xml",
+      "io.grpc.netty.shaded.io.netty.handler.flow",
+      "io.grpc.netty.shaded.io.netty.handler.flush",
+      "io.grpc.netty.shaded.io.netty.handler.ipfilter",
+      "io.grpc.netty.shaded.io.netty.handler.logging",
+      "io.grpc.netty.shaded.io.netty.handler.pcap",
+      "io.grpc.netty.shaded.io.netty.handler.proxy",
+      "io.grpc.netty.shaded.io.netty.handler.ssl",
+      "io.grpc.netty.shaded.io.netty.handler.ssl.ocsp",
+      "io.grpc.netty.shaded.io.netty.handler.ssl.util",
+      "io.grpc.netty.shaded.io.netty.handler.stream",
+      "io.grpc.netty.shaded.io.netty.handler.timeout",
+      "io.grpc.netty.shaded.io.netty.handler.traffic",
+      "io.grpc.netty.shaded.io.netty.internal.tcnative",
+      "io.grpc.netty.shaded.io.netty.resolver",
+      "io.grpc.netty.shaded.io.netty.util",
+      "io.grpc.netty.shaded.io.netty.util.collection",
+      "io.grpc.netty.shaded.io.netty.util.concurrent",
+      "io.grpc.netty.shaded.io.netty.util.internal",
+      "io.grpc.netty.shaded.io.netty.util.internal.logging",
+      "io.grpc.netty.shaded.io.netty.util.internal.shaded.org.jctools.queues",
+      "io.grpc.netty.shaded.io.netty.util.internal.shaded.org.jctools.queues.atomic",
+      "io.grpc.netty.shaded.io.netty.util.internal.shaded.org.jctools.util",
+      "io.grpc.netty.shaded.io.netty.util.internal.svm"
+    ],
+    "io.grpc:grpc-protobuf": [
+      "io.grpc.protobuf"
+    ],
+    "io.grpc:grpc-protobuf-lite": [
+      "io.grpc.protobuf.lite"
+    ],
+    "io.grpc:grpc-services": [
+      "io.grpc.binarylog.v1",
+      "io.grpc.channelz.v1",
+      "io.grpc.health.v1",
+      "io.grpc.protobuf.services",
+      "io.grpc.protobuf.services.internal",
+      "io.grpc.reflection.v1",
+      "io.grpc.reflection.v1alpha",
+      "io.grpc.services"
+    ],
+    "io.grpc:grpc-stub": [
+      "io.grpc.stub",
+      "io.grpc.stub.annotations"
+    ],
+    "io.grpc:grpc-util": [
+      "io.grpc.util"
+    ],
+    "io.grpc:grpc-xds": [
+      "io.grpc.xds",
+      "io.grpc.xds.client",
+      "io.grpc.xds.internal",
+      "io.grpc.xds.internal.rbac.engine",
+      "io.grpc.xds.internal.security",
+      "io.grpc.xds.internal.security.certprovider",
+      "io.grpc.xds.internal.security.trust",
+      "io.grpc.xds.orca",
+      "io.grpc.xds.shaded.com.github.udpa.udpa.type.v1",
+      "io.grpc.xds.shaded.com.github.xds.core.v3",
+      "io.grpc.xds.shaded.com.github.xds.data.orca.v3",
+      "io.grpc.xds.shaded.com.github.xds.service.orca.v3",
+      "io.grpc.xds.shaded.com.github.xds.type.matcher.v3",
+      "io.grpc.xds.shaded.com.github.xds.type.v3",
+      "io.grpc.xds.shaded.com.google.api.expr.v1alpha1",
+      "io.grpc.xds.shaded.dev.cel.expr",
+      "io.grpc.xds.shaded.envoy.annotations",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.admin.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.config.accesslog.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.config.bootstrap.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.config.cluster.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.config.core.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.config.endpoint.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.config.listener.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.config.metrics.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.config.overload.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.config.rbac.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.config.route.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.config.trace.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.data.accesslog.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.extensions.clusters.aggregate.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.extensions.filters.common.fault.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.extensions.filters.http.fault.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.extensions.filters.http.rate_limit_quota.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.extensions.filters.http.rbac.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.extensions.filters.http.router.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.extensions.filters.network.http_connection_manager.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.extensions.load_balancing_policies.client_side_weighted_round_robin.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.extensions.load_balancing_policies.common.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.extensions.load_balancing_policies.least_request.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.extensions.load_balancing_policies.pick_first.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.extensions.load_balancing_policies.ring_hash.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.extensions.load_balancing_policies.round_robin.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.extensions.load_balancing_policies.wrr_locality.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.extensions.transport_sockets.tls.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.service.discovery.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.service.load_stats.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.service.rate_limit_quota.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.service.status.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.type.http.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.type.matcher.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.type.metadata.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.type.tracing.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.envoy.type.v3",
+      "io.grpc.xds.shaded.io.envoyproxy.pgv.validate",
+      "io.grpc.xds.shaded.udpa.annotations",
+      "io.grpc.xds.shaded.xds.annotations.v3"
+    ],
     "io.netty:netty-buffer": [
       "io.netty.buffer",
       "io.netty.buffer.search"
@@ -791,6 +1379,37 @@
       "io.netty.channel.udt",
       "io.netty.channel.udt.nio"
     ],
+    "io.opencensus:opencensus-api": [
+      "io.opencensus.common",
+      "io.opencensus.internal",
+      "io.opencensus.metrics",
+      "io.opencensus.metrics.data",
+      "io.opencensus.metrics.export",
+      "io.opencensus.resource",
+      "io.opencensus.stats",
+      "io.opencensus.tags",
+      "io.opencensus.tags.propagation",
+      "io.opencensus.tags.unsafe",
+      "io.opencensus.trace",
+      "io.opencensus.trace.config",
+      "io.opencensus.trace.export",
+      "io.opencensus.trace.internal",
+      "io.opencensus.trace.propagation",
+      "io.opencensus.trace.samplers",
+      "io.opencensus.trace.unsafe"
+    ],
+    "io.opencensus:opencensus-contrib-http-util": [
+      "io.opencensus.contrib.http",
+      "io.opencensus.contrib.http.util"
+    ],
+    "io.perfmark:perfmark-api": [
+      "io.perfmark"
+    ],
+    "javax.annotation:javax.annotation-api": [
+      "javax.annotation",
+      "javax.annotation.security",
+      "javax.annotation.sql"
+    ],
     "net.bytebuddy:byte-buddy": [
       "net.bytebuddy",
       "net.bytebuddy.agent.builder",
@@ -946,6 +1565,7 @@
       "org.checkerframework.checker.interning.qual",
       "org.checkerframework.checker.lock.qual",
       "org.checkerframework.checker.mustcall.qual",
+      "org.checkerframework.checker.nonempty.qual",
       "org.checkerframework.checker.nullness.qual",
       "org.checkerframework.checker.optional.qual",
       "org.checkerframework.checker.propkey.qual",
@@ -1012,6 +1632,14 @@
       "org.checkerframework.nullaway.org.plumelib.reflection",
       "org.checkerframework.nullaway.org.plumelib.util"
     ],
+    "org.codehaus.mojo:animal-sniffer-annotations": [
+      "org.codehaus.mojo.animal_sniffer"
+    ],
+    "org.conscrypt:conscrypt-openjdk-uber": [
+      "org.conscrypt",
+      "org.conscrypt.ct",
+      "org.conscrypt.io"
+    ],
     "org.mockito:mockito-core": [
       "org.mockito",
       "org.mockito.codegen",
@@ -1098,10 +1726,38 @@
     ],
     "org.slf4j:slf4j-jdk14": [
       "org.slf4j.jul"
+    ],
+    "org.threeten:threetenbp": [
+      "org.threeten.bp",
+      "org.threeten.bp.chrono",
+      "org.threeten.bp.format",
+      "org.threeten.bp.jdk8",
+      "org.threeten.bp.temporal",
+      "org.threeten.bp.zone"
     ]
   },
   "repositories": {
     "https://repo1.maven.org/maven2/": [
+      "com.google.android:annotations",
+      "com.google.android:annotations:jar:sources",
+      "com.google.api.grpc:proto-google-cloud-monitoring-v3",
+      "com.google.api.grpc:proto-google-cloud-monitoring-v3:jar:sources",
+      "com.google.api.grpc:proto-google-common-protos",
+      "com.google.api.grpc:proto-google-common-protos:jar:sources",
+      "com.google.api:api-common",
+      "com.google.api:api-common:jar:sources",
+      "com.google.api:gax",
+      "com.google.api:gax-grpc",
+      "com.google.api:gax-grpc:jar:sources",
+      "com.google.api:gax:jar:sources",
+      "com.google.auth:google-auth-library-credentials",
+      "com.google.auth:google-auth-library-credentials:jar:sources",
+      "com.google.auth:google-auth-library-oauth2-http",
+      "com.google.auth:google-auth-library-oauth2-http:jar:sources",
+      "com.google.auto.value:auto-value-annotations",
+      "com.google.auto.value:auto-value-annotations:jar:sources",
+      "com.google.cloud:google-cloud-monitoring",
+      "com.google.cloud:google-cloud-monitoring:jar:sources",
       "com.google.code.findbugs:jsr305",
       "com.google.code.findbugs:jsr305:jar:sources",
       "com.google.code.gson:gson",
@@ -1113,8 +1769,18 @@
       "com.google.guava:guava",
       "com.google.guava:guava:jar:sources",
       "com.google.guava:listenablefuture",
+      "com.google.http-client:google-http-client",
+      "com.google.http-client:google-http-client-gson",
+      "com.google.http-client:google-http-client-gson:jar:sources",
+      "com.google.http-client:google-http-client:jar:sources",
       "com.google.j2objc:j2objc-annotations",
       "com.google.j2objc:j2objc-annotations:jar:sources",
+      "com.google.protobuf:protobuf-java",
+      "com.google.protobuf:protobuf-java-util",
+      "com.google.protobuf:protobuf-java-util:jar:sources",
+      "com.google.protobuf:protobuf-java:jar:sources",
+      "com.google.re2j:re2j",
+      "com.google.re2j:re2j:jar:sources",
       "com.uber.nullaway:nullaway",
       "com.uber.nullaway:nullaway:jar:sources",
       "commons-codec:commons-codec",
@@ -1123,6 +1789,36 @@
       "commons-logging:commons-logging:jar:sources",
       "io.github.littleproxy:littleproxy",
       "io.github.littleproxy:littleproxy:jar:sources",
+      "io.grpc:grpc-alts",
+      "io.grpc:grpc-alts:jar:sources",
+      "io.grpc:grpc-api",
+      "io.grpc:grpc-api:jar:sources",
+      "io.grpc:grpc-auth",
+      "io.grpc:grpc-auth:jar:sources",
+      "io.grpc:grpc-context",
+      "io.grpc:grpc-context:jar:sources",
+      "io.grpc:grpc-core",
+      "io.grpc:grpc-core:jar:sources",
+      "io.grpc:grpc-googleapis",
+      "io.grpc:grpc-googleapis:jar:sources",
+      "io.grpc:grpc-grpclb",
+      "io.grpc:grpc-grpclb:jar:sources",
+      "io.grpc:grpc-inprocess",
+      "io.grpc:grpc-inprocess:jar:sources",
+      "io.grpc:grpc-netty-shaded",
+      "io.grpc:grpc-netty-shaded:jar:sources",
+      "io.grpc:grpc-protobuf",
+      "io.grpc:grpc-protobuf-lite",
+      "io.grpc:grpc-protobuf-lite:jar:sources",
+      "io.grpc:grpc-protobuf:jar:sources",
+      "io.grpc:grpc-services",
+      "io.grpc:grpc-services:jar:sources",
+      "io.grpc:grpc-stub",
+      "io.grpc:grpc-stub:jar:sources",
+      "io.grpc:grpc-util",
+      "io.grpc:grpc-util:jar:sources",
+      "io.grpc:grpc-xds",
+      "io.grpc:grpc-xds:jar:sources",
       "io.netty:netty-all",
       "io.netty:netty-buffer",
       "io.netty:netty-buffer:jar:sources",
@@ -1188,6 +1884,14 @@
       "io.netty:netty-transport-udt",
       "io.netty:netty-transport-udt:jar:sources",
       "io.netty:netty-transport:jar:sources",
+      "io.opencensus:opencensus-api",
+      "io.opencensus:opencensus-api:jar:sources",
+      "io.opencensus:opencensus-contrib-http-util",
+      "io.opencensus:opencensus-contrib-http-util:jar:sources",
+      "io.perfmark:perfmark-api",
+      "io.perfmark:perfmark-api:jar:sources",
+      "javax.annotation:javax.annotation-api",
+      "javax.annotation:javax.annotation-api:jar:sources",
       "net.bytebuddy:byte-buddy",
       "net.bytebuddy:byte-buddy-agent",
       "net.bytebuddy:byte-buddy-agent:jar:sources",
@@ -1204,6 +1908,10 @@
       "org.checkerframework:checker-qual:jar:sources",
       "org.checkerframework:dataflow-nullaway",
       "org.checkerframework:dataflow-nullaway:jar:sources",
+      "org.codehaus.mojo:animal-sniffer-annotations",
+      "org.codehaus.mojo:animal-sniffer-annotations:jar:sources",
+      "org.conscrypt:conscrypt-openjdk-uber",
+      "org.conscrypt:conscrypt-openjdk-uber:jar:sources",
       "org.mockito:mockito-core",
       "org.mockito:mockito-core:jar:sources",
       "org.objenesis:objenesis",
@@ -1211,7 +1919,9 @@
       "org.slf4j:slf4j-api",
       "org.slf4j:slf4j-api:jar:sources",
       "org.slf4j:slf4j-jdk14",
-      "org.slf4j:slf4j-jdk14:jar:sources"
+      "org.slf4j:slf4j-jdk14:jar:sources",
+      "org.threeten:threetenbp",
+      "org.threeten:threetenbp:jar:sources"
     ]
   },
   "version": "2"
diff --git a/pom.xml b/pom.xml
index d300e82..351cc06 100644
--- a/pom.xml
+++ b/pom.xml
@@ -75,6 +75,18 @@
             <version>2.0.13</version>
         </dependency>
 
+        <!-- OpenCensus for metrics -->
+        <dependency>
+            <groupId>io.opencensus</groupId>
+            <artifactId>opencensus-api</artifactId>
+            <version>0.31.1</version>
+        </dependency>
+        <dependency>
+            <groupId>io.opencensus</groupId>
+            <artifactId>opencensus-exporter-stats-stackdriver</artifactId>
+            <version>0.31.1</version>
+        </dependency>
+
         <!-- Annotation processors -->
         <dependency>
             <groupId>com.uber.nullaway</groupId>
diff --git a/src/main/java/com/glean/proxy/BUILD.bazel b/src/main/java/com/glean/proxy/BUILD.bazel
index 8921ec6..b1b287f 100644
--- a/src/main/java/com/glean/proxy/BUILD.bazel
+++ b/src/main/java/com/glean/proxy/BUILD.bazel
@@ -19,6 +19,7 @@ java_library(
     deps = [
         "//src/main/java/com/glean/proxy/filters",
         "//src/main/java/com/glean/proxy/filters/helpers",
+        "//src/main/java/com/glean/proxy/metrics",
         "//src/main/java/com/glean/proxy/schemas",
         "@maven//:io_github_littleproxy_littleproxy",
         "@maven//:io_netty_netty_codec_http",
diff --git a/src/main/java/com/glean/proxy/FilterConfiguration.java b/src/main/java/com/glean/proxy/FilterConfiguration.java
index c5af098..1806427 100644
--- a/src/main/java/com/glean/proxy/FilterConfiguration.java
+++ b/src/main/java/com/glean/proxy/FilterConfiguration.java
@@ -6,8 +6,10 @@
 import com.glean.proxy.filters.IpAddressRequestFilter;
 import com.glean.proxy.filters.IpAddressRequestFilter.ALLOWED_PROXY_ADDRESS_TYPE;
 import com.glean.proxy.filters.ProxyDebugFilter;
+import com.glean.proxy.filters.ProxyMetricsFilter;
 import com.glean.proxy.filters.UpgradeRequestFilter;
 import com.glean.proxy.filters.helpers.AllowedEgressDomains;
+import com.glean.proxy.metrics.ProxyMetrics;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.handler.codec.http.HttpRequest;
 import java.util.ArrayList;
@@ -78,6 +80,11 @@ public record FilterConfiguration(
                         "true".equalsIgnoreCase(System.getenv("UPGRADE_HTTP_REQUESTS"));
                     return (request, ctx) -> new UpgradeRequestFilter(request, upgradeHttpRequests);
                   },
+                  ProxyMetricsFilter.class.getSimpleName(),
+                  () -> {
+                    final ProxyMetrics metrics = ProxyMetrics.getInstance();
+                    return (request, ctx) -> new ProxyMetricsFilter(request, metrics);
+                  },
 
                   // Debug filters
                   ProxyDebugFilter.class.getSimpleName(),
@@ -123,7 +130,8 @@ public static FilterConfiguration fromEnvironment() {
         String.join(
             ",",
             IpAddressRequestFilter.class.getSimpleName(),
-            UpgradeRequestFilter.class.getSimpleName());
+            UpgradeRequestFilter.class.getSimpleName(),
+            ProxyMetricsFilter.class.getSimpleName());
     String crossPlatformFiltersString =
         System.getenv().getOrDefault("CROSS_PLATFORM_FILTERS", defaultCrossPlatformFilters);
 
diff --git a/src/main/java/com/glean/proxy/ProxyNetworking.java b/src/main/java/com/glean/proxy/ProxyNetworking.java
index 2caa748..86262d3 100644
--- a/src/main/java/com/glean/proxy/ProxyNetworking.java
+++ b/src/main/java/com/glean/proxy/ProxyNetworking.java
@@ -1,6 +1,9 @@
 package com.glean.proxy;
 
+import com.glean.proxy.metrics.ProxyMetrics;
+import com.glean.proxy.metrics.ProxyMetricsExporter;
 import java.net.InetSocketAddress;
+import java.time.Clock;
 import java.util.logging.Logger;
 import org.littleshoot.proxy.ChainedProxyManager;
 import org.littleshoot.proxy.HttpProxyServer;
@@ -9,6 +12,7 @@
 
 public class ProxyNetworking {
   private static final Logger logger = Logger.getLogger(ProxyNetworking.class.getName());
+  private static ProxyMetricsExporter metricsExporter;
 
   protected final ThreadPoolConfiguration threadPoolConfiguration;
   protected final FilterConfiguration filterConfiguration;
@@ -75,10 +79,41 @@ public ProxyNetworking build() {
       if (chainedProxyManager == null) {
         chainedProxyManager = ChainedProxyConfiguration.fromEnvironment();
       }
+
+      // Initialize metrics exporter
+      initializeMetricsExporter();
+
       return new ProxyNetworking(this);
     }
   }
 
+  private static void initializeMetricsExporter() {
+    String gcpProjectId = System.getenv("GCP_PROJECT_ID");
+    String enableMetricsExport = System.getenv("ENABLE_METRICS_EXPORT");
+
+    // Always initialize ProxyMetrics for local tracking
+    ProxyMetrics metrics = ProxyMetrics.getInstance();
+
+    // Check if metrics export is explicitly disabled
+    if (enableMetricsExport != null &&
+        (enableMetricsExport.equalsIgnoreCase("false") || enableMetricsExport.equals("0"))) {
+      logger.info("Metrics export disabled via ENABLE_METRICS_EXPORT. Metrics will be tracked locally only.");
+      return;
+    }
+
+    if (gcpProjectId == null || gcpProjectId.isEmpty()) {
+      logger.warning("GCP_PROJECT_ID not set. Metrics will be tracked but not exported to Cloud Monitoring.");
+      return;
+    }
+
+    try {
+      logger.info("Initializing ProxyMetricsExporter for project: " + gcpProjectId);
+      metricsExporter = new ProxyMetricsExporter(gcpProjectId, Clock.systemUTC(), metrics.getMetrics());
+    } catch (Exception e) {
+      logger.severe("Failed to initialize ProxyMetricsExporter: " + e.getMessage());
+    }
+  }
+
   private static ThreadPoolConfiguration createThreadPoolConfigurationFromEnvironment() {
     int numAcceptorThreads =
         Integer.parseInt(System.getenv().getOrDefault("NUM_ACCEPTOR_THREADS", "4"));
diff --git a/src/main/java/com/glean/proxy/filters/BUILD.bazel b/src/main/java/com/glean/proxy/filters/BUILD.bazel
index 39efb31..aaaaf78 100644
--- a/src/main/java/com/glean/proxy/filters/BUILD.bazel
+++ b/src/main/java/com/glean/proxy/filters/BUILD.bazel
@@ -8,6 +8,7 @@ java_library(
     visibility = ["//visibility:public"],
     deps = [
         "//src/main/java/com/glean/proxy/filters/helpers",
+        "//src/main/java/com/glean/proxy/metrics",
         "//src/main/java/com/glean/proxy/schemas",
         "@maven//:com_google_code_gson_gson",
         "@maven//:io_github_littleproxy_littleproxy",
diff --git a/src/main/java/com/glean/proxy/filters/CompositeFilter.java b/src/main/java/com/glean/proxy/filters/CompositeFilter.java
index f3e1f1e..90af2e2 100644
--- a/src/main/java/com/glean/proxy/filters/CompositeFilter.java
+++ b/src/main/java/com/glean/proxy/filters/CompositeFilter.java
@@ -50,4 +50,16 @@ public HttpResponse proxyToServerRequest(HttpObject httpObject) {
     }
     return null;
   }
+
+  @Override
+  public HttpObject proxyToClientResponse(HttpObject httpObject) {
+    HttpObject currentObject = httpObject;
+    for (HttpFilters filter : filters) {
+      HttpObject result = filter.proxyToClientResponse(currentObject);
+      if (result != null) {
+        currentObject = result;
+      }
+    }
+    return currentObject;
+  }
 }
diff --git a/src/main/java/com/glean/proxy/filters/ProxyMetricsFilter.java b/src/main/java/com/glean/proxy/filters/ProxyMetricsFilter.java
new file mode 100644
index 0000000..2a1a1ff
--- /dev/null
+++ b/src/main/java/com/glean/proxy/filters/ProxyMetricsFilter.java
@@ -0,0 +1,48 @@
+package com.glean.proxy.filters;
+
+import com.glean.proxy.metrics.ProxyMetrics;
+import io.netty.handler.codec.http.HttpObject;
+import io.netty.handler.codec.http.HttpRequest;
+import io.netty.handler.codec.http.HttpResponse;
+import java.util.logging.Logger;
+import org.littleshoot.proxy.HttpFiltersAdapter;
+
+/**
+ * Filter that records metrics for proxy requests using OpenCensus.
+ * Tracks request counts and latencies, labeled by HTTP method and success/failure status.
+ */
+public class ProxyMetricsFilter extends HttpFiltersAdapter {
+  private static final Logger logger = Logger.getLogger(ProxyMetricsFilter.class.getName());
+
+  private long requestStartTime;
+  private final ProxyMetrics metrics;
+
+  public ProxyMetricsFilter(HttpRequest originalRequest, ProxyMetrics metrics) {
+    super(originalRequest);
+    this.metrics = metrics;
+  }
+
+  @Override
+  public HttpResponse clientToProxyRequest(HttpObject httpObject) {
+    requestStartTime = System.currentTimeMillis();
+    return null;
+  }
+
+  @Override
+  public HttpObject proxyToClientResponse(HttpObject httpObject) {
+    if (httpObject instanceof HttpResponse) {
+      HttpResponse response = (HttpResponse) httpObject;
+      long latencyMs = System.currentTimeMillis() - requestStartTime;
+      String method = originalRequest.method().name();
+      int statusCode = response.status().code();
+
+      metrics.recordRequest(statusCode, method, latencyMs);
+
+      logger.finest(
+          String.format(
+              "Proxy request: method=%s, status=%d, latency=%dms",
+              method, statusCode, latencyMs));
+    }
+    return httpObject;
+  }
+}
diff --git a/src/main/java/com/glean/proxy/metrics/BUILD.bazel b/src/main/java/com/glean/proxy/metrics/BUILD.bazel
new file mode 100644
index 0000000..56061e3
--- /dev/null
+++ b/src/main/java/com/glean/proxy/metrics/BUILD.bazel
@@ -0,0 +1,16 @@
+load("@rules_java//java:defs.bzl", "java_library")
+
+package(default_visibility = ["//visibility:public"])
+
+java_library(
+    name = "metrics",
+    srcs = glob(["*.java"]),
+    visibility = ["//visibility:public"],
+    deps = [
+        "@maven//:com_google_api_api_common",
+        "@maven//:com_google_api_grpc_proto_google_cloud_monitoring_v3",
+        "@maven//:com_google_api_grpc_proto_google_common_protos",
+        "@maven//:com_google_cloud_google_cloud_monitoring",
+        "@maven//:com_google_protobuf_protobuf_java",
+    ],
+)
diff --git a/src/main/java/com/glean/proxy/metrics/MetricData.java b/src/main/java/com/glean/proxy/metrics/MetricData.java
new file mode 100644
index 0000000..abdd27b
--- /dev/null
+++ b/src/main/java/com/glean/proxy/metrics/MetricData.java
@@ -0,0 +1,151 @@
+package com.glean.proxy.metrics;
+
+import java.util.Objects;
+import java.util.concurrent.atomic.AtomicLong;
+
+/**
+ * Stores aggregated metric data for a specific tag combination.
+ * Thread-safe using atomic operations.
+ */
+public class MetricData {
+  // Latency bucket boundaries in milliseconds
+  // Creates buckets: [0,10), [10,25), [25,50), [50,100), [100,250), [250,500),
+  //                  [500,1000), [1000,2500), [2500,5000), [5000,10000), [10000,∞)
+  public static final double[] BUCKET_BOUNDS = {
+    0, 10, 25, 50, 100, 250, 500, 1000, 2500, 5000, 10000
+  };
+
+  private final String statusCode;
+  private final String method;
+  private final AtomicLong count = new AtomicLong(0);
+  private final AtomicLong totalLatencyMs = new AtomicLong(0);
+  private final AtomicLong minLatencyMs = new AtomicLong(Long.MAX_VALUE);
+  private final AtomicLong maxLatencyMs = new AtomicLong(0);
+
+  // Histogram buckets: one more than bounds (for overflow bucket)
+  private final AtomicLong[] bucketCounts = new AtomicLong[BUCKET_BOUNDS.length + 1];
+
+  public MetricData(String statusCode, String method) {
+    this.statusCode = statusCode;
+    this.method = method;
+
+    // Initialize bucket counters
+    for (int i = 0; i < bucketCounts.length; i++) {
+      bucketCounts[i] = new AtomicLong(0);
+    }
+  }
+
+  public void record(long latencyMs) {
+    count.incrementAndGet();
+    totalLatencyMs.addAndGet(latencyMs);
+
+    // Update histogram bucket
+    int bucketIndex = findBucketIndex(latencyMs);
+    bucketCounts[bucketIndex].incrementAndGet();
+
+    // Update min
+    long currentMin = minLatencyMs.get();
+    while (latencyMs < currentMin) {
+      if (minLatencyMs.compareAndSet(currentMin, latencyMs)) {
+        break;
+      }
+      currentMin = minLatencyMs.get();
+    }
+
+    // Update max
+    long currentMax = maxLatencyMs.get();
+    while (latencyMs > currentMax) {
+      if (maxLatencyMs.compareAndSet(currentMax, latencyMs)) {
+        break;
+      }
+      currentMax = maxLatencyMs.get();
+    }
+  }
+
+  private int findBucketIndex(long latencyMs) {
+    for (int i = 0; i < BUCKET_BOUNDS.length; i++) {
+      if (latencyMs < BUCKET_BOUNDS[i]) {
+        return i;
+      }
+    }
+    // Overflow bucket (values >= last bound)
+    return BUCKET_BOUNDS.length;
+  }
+
+  public String getStatusCode() {
+    return statusCode;
+  }
+
+  public String getMethod() {
+    return method;
+  }
+
+  public long getCount() {
+    return count.get();
+  }
+
+  public long getTotalLatencyMs() {
+    return totalLatencyMs.get();
+  }
+
+  public long getMinLatencyMs() {
+    long min = minLatencyMs.get();
+    return min == Long.MAX_VALUE ? 0 : min;
+  }
+
+  public long getMaxLatencyMs() {
+    return maxLatencyMs.get();
+  }
+
+  public double getAvgLatencyMs() {
+    long c = count.get();
+    return c == 0 ? 0 : (double) totalLatencyMs.get() / c;
+  }
+
+  /**
+   * Get bucket counts for histogram.
+   * Returns a snapshot of current bucket counts.
+   */
+  public long[] getBucketCounts() {
+    long[] counts = new long[bucketCounts.length];
+    for (int i = 0; i < bucketCounts.length; i++) {
+      counts[i] = bucketCounts[i].get();
+    }
+    return counts;
+  }
+
+  /**
+   * Reset all metrics (called after export).
+   */
+  public void reset() {
+    count.set(0);
+    totalLatencyMs.set(0);
+    minLatencyMs.set(Long.MAX_VALUE);
+    maxLatencyMs.set(0);
+
+    // Reset histogram buckets
+    for (AtomicLong bucket : bucketCounts) {
+      bucket.set(0);
+    }
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+    MetricData that = (MetricData) o;
+    return Objects.equals(statusCode, that.statusCode) && Objects.equals(method, that.method);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(statusCode, method);
+  }
+
+  @Override
+  public String toString() {
+    return String.format(
+        "MetricData{status=%s, method=%s, count=%d, avg=%.2fms, min=%dms, max=%dms}",
+        statusCode, method, getCount(), getAvgLatencyMs(), getMinLatencyMs(), getMaxLatencyMs());
+  }
+}
diff --git a/src/main/java/com/glean/proxy/metrics/ProxyMetrics.java b/src/main/java/com/glean/proxy/metrics/ProxyMetrics.java
new file mode 100644
index 0000000..ad73bc5
--- /dev/null
+++ b/src/main/java/com/glean/proxy/metrics/ProxyMetrics.java
@@ -0,0 +1,38 @@
+package com.glean.proxy.metrics;
+
+import com.glean.proxy.metrics.ProxyMetricsExporter.MetricKey;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.logging.Logger;
+
+/**
+ * Metrics collector for proxy requests.
+ * Uses manual in-memory tracking instead of OpenCensus views.
+ */
+public class ProxyMetrics {
+  private static final Logger logger = Logger.getLogger(ProxyMetrics.class.getName());
+  private static ProxyMetrics instance;
+
+  // Manual metric tracking (thread-safe)
+  private final ConcurrentHashMap<MetricKey, MetricData> metrics = new ConcurrentHashMap<>();
+
+  public static synchronized ProxyMetrics getInstance() {
+    if (instance == null) {
+      instance = new ProxyMetrics();
+    }
+    return instance;
+  }
+
+  public ConcurrentHashMap<MetricKey, MetricData> getMetrics() {
+    return metrics;
+  }
+
+  public void recordRequest(int statusCode, String method, long latencyMs) {
+    try {
+      MetricKey key = new MetricKey(String.valueOf(statusCode), method);
+      MetricData data = metrics.computeIfAbsent(key, k -> new MetricData(k.getStatusCode(), k.getMethod()));
+      data.record(latencyMs);
+    } catch (Exception e) {
+      logger.severe("Failed to record metrics: " + e.getMessage());
+    }
+  }
+}
diff --git a/src/main/java/com/glean/proxy/metrics/ProxyMetricsExporter.java b/src/main/java/com/glean/proxy/metrics/ProxyMetricsExporter.java
new file mode 100644
index 0000000..da3f0aa
--- /dev/null
+++ b/src/main/java/com/glean/proxy/metrics/ProxyMetricsExporter.java
@@ -0,0 +1,278 @@
+package com.glean.proxy.metrics;
+
+import com.google.api.Distribution;
+import com.google.api.Distribution.BucketOptions;
+import com.google.api.Distribution.BucketOptions.Explicit;
+import com.google.api.Metric;
+import com.google.api.MonitoredResource;
+import com.google.cloud.monitoring.v3.MetricServiceClient;
+import com.google.monitoring.v3.CreateTimeSeriesRequest;
+import com.google.monitoring.v3.Point;
+import com.google.monitoring.v3.ProjectName;
+import com.google.monitoring.v3.TimeInterval;
+import com.google.monitoring.v3.TimeSeries;
+import com.google.monitoring.v3.TypedValue;
+import com.google.protobuf.Timestamp;
+import java.io.Closeable;
+import java.time.Clock;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.Timer;
+import java.util.TimerTask;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.logging.Logger;
+import java.util.stream.Collectors;
+
+/**
+ * Periodically exports proxy metrics to GCP Cloud Monitoring.
+ */
+public class ProxyMetricsExporter implements Closeable {
+  private static final Logger logger = Logger.getLogger(ProxyMetricsExporter.class.getName());
+  private static final long EXPORT_INTERVAL_MS = 60000; // 60 seconds
+
+  private final String projectId;
+  private final Clock clock;
+  private final Timer exportTimer;
+  private final ConcurrentHashMap<MetricKey, MetricData> metrics;
+  private MetricServiceClient metricServiceClient;
+
+  public ProxyMetricsExporter(
+      String projectId, Clock clock, ConcurrentHashMap<MetricKey, MetricData> metrics) {
+    this.projectId = projectId;
+    this.clock = clock;
+    this.metrics = metrics;
+    this.exportTimer = new Timer("ProxyMetricsExporter", true);
+
+    // Initialize GCP Monitoring client
+    try {
+      this.metricServiceClient = MetricServiceClient.create();
+      logger.info("MetricServiceClient created successfully");
+    } catch (Exception e) {
+      logger.severe("Failed to create MetricServiceClient: " + e.getMessage());
+      e.printStackTrace();
+    }
+
+    // Schedule periodic exports
+    exportTimer.scheduleAtFixedRate(
+        new TimerTask() {
+          @Override
+          public void run() {
+            exportMetrics();
+          }
+        },
+        EXPORT_INTERVAL_MS,
+        EXPORT_INTERVAL_MS);
+
+    logger.info(
+        String.format(
+            "ProxyMetricsExporter initialized for project %s, exporting every %d seconds",
+            projectId, EXPORT_INTERVAL_MS / 1000));
+  }
+
+  private void exportMetrics() {
+    if (metricServiceClient == null) {
+      logger.warning("MetricServiceClient not initialized, skipping export");
+      return;
+    }
+
+    try {
+      Instant now = clock.instant();
+      List<TimeSeries> timeSeriesList = new ArrayList<>();
+
+      // Snapshot and reset metrics
+      Map<MetricKey, MetricData> snapshot = new ConcurrentHashMap<>(metrics);
+      int totalMetrics = 0;
+
+      for (Map.Entry<MetricKey, MetricData> entry : snapshot.entrySet()) {
+        MetricKey key = entry.getKey();
+        MetricData data = entry.getValue();
+
+        long count = data.getCount();
+        if (count == 0) {
+          continue; // Skip empty metrics
+        }
+
+        totalMetrics++;
+
+        // Create time series for request count
+        timeSeriesList.add(createCountTimeSeries(key, data, now));
+
+        // Create time series for request latency (distribution)
+        timeSeriesList.add(createLatencyTimeSeries(key, data, now));
+
+        // Reset the metric after export
+        MetricData originalData = metrics.get(key);
+        if (originalData != null) {
+          originalData.reset();
+        }
+      }
+
+      if (timeSeriesList.isEmpty()) {
+        logger.fine("No metrics to export");
+        return;
+      }
+
+      // Send to GCP Cloud Monitoring
+      ProjectName projectName = ProjectName.of(projectId);
+      CreateTimeSeriesRequest request =
+          CreateTimeSeriesRequest.newBuilder()
+              .setName(projectName.toString())
+              .addAllTimeSeries(timeSeriesList)
+              .build();
+
+      metricServiceClient.createTimeSeries(request);
+
+      logger.info(
+          String.format(
+              "Successfully exported %d metrics (%d time series) to Cloud Monitoring",
+              totalMetrics, timeSeriesList.size()));
+
+    } catch (Exception e) {
+      logger.severe("Failed to export metrics: " + e.getMessage());
+      e.printStackTrace();
+    }
+  }
+
+  private TimeSeries createCountTimeSeries(MetricKey key, MetricData data, Instant now) {
+    Metric metric =
+        Metric.newBuilder()
+            .setType("custom.googleapis.com/proxy/request_count")
+            .putLabels("status_code", key.getStatusCode())
+            .putLabels("method", key.getMethod())
+            .build();
+
+    MonitoredResource resource =
+        MonitoredResource.newBuilder().setType("global").putLabels("project_id", projectId).build();
+
+    Timestamp timestamp = Timestamp.newBuilder().setSeconds(now.getEpochSecond()).build();
+    TimeInterval interval =
+        TimeInterval.newBuilder().setEndTime(timestamp).setStartTime(timestamp).build();
+
+    Point point =
+        Point.newBuilder()
+            .setInterval(interval)
+            .setValue(TypedValue.newBuilder().setInt64Value(data.getCount()).build())
+            .build();
+
+    return TimeSeries.newBuilder()
+        .setMetric(metric)
+        .setResource(resource)
+        .setValueType(com.google.api.MetricDescriptor.ValueType.INT64)
+        .setMetricKind(com.google.api.MetricDescriptor.MetricKind.GAUGE)
+        .addPoints(point)
+        .build();
+  }
+
+  private TimeSeries createLatencyTimeSeries(MetricKey key, MetricData data, Instant now) {
+    Metric metric =
+        Metric.newBuilder()
+            .setType("custom.googleapis.com/proxy/request_latency_distribution")
+            .putLabels("status_code", key.getStatusCode())
+            .putLabels("method", key.getMethod())
+            .build();
+
+    MonitoredResource resource =
+        MonitoredResource.newBuilder().setType("global").putLabels("project_id", projectId).build();
+
+    Timestamp timestamp = Timestamp.newBuilder().setSeconds(now.getEpochSecond()).build();
+    TimeInterval interval =
+        TimeInterval.newBuilder().setEndTime(timestamp).setStartTime(timestamp).build();
+
+    // Create distribution with explicit bucket boundaries
+    // Convert double[] to List<Double> for BucketOptions
+    List<Double> bounds = Arrays.stream(MetricData.BUCKET_BOUNDS)
+        .boxed()
+        .collect(Collectors.toList());
+
+    BucketOptions bucketOptions =
+        BucketOptions.newBuilder()
+            .setExplicitBuckets(Explicit.newBuilder().addAllBounds(bounds).build())
+            .build();
+
+    // Get bucket counts from data
+    long[] bucketCounts = data.getBucketCounts();
+
+    Distribution.Builder distributionBuilder =
+        Distribution.newBuilder()
+            .setCount(data.getCount())
+            .setMean(data.getAvgLatencyMs())
+            .setBucketOptions(bucketOptions);
+
+    // Add bucket counts (convert long[] to List<Long>)
+    for (long count : bucketCounts) {
+      distributionBuilder.addBucketCounts(count);
+    }
+
+    Distribution distribution = distributionBuilder.build();
+
+    Point point =
+        Point.newBuilder()
+            .setInterval(interval)
+            .setValue(TypedValue.newBuilder().setDistributionValue(distribution).build())
+            .build();
+
+    return TimeSeries.newBuilder()
+        .setMetric(metric)
+        .setResource(resource)
+        .setValueType(com.google.api.MetricDescriptor.ValueType.DISTRIBUTION)
+        .setMetricKind(com.google.api.MetricDescriptor.MetricKind.GAUGE)
+        .addPoints(point)
+        .build();
+  }
+
+  @Override
+  public void close() {
+    logger.info("Shutting down ProxyMetricsExporter...");
+    exportTimer.cancel();
+
+    // Do final export
+    exportMetrics();
+
+    if (metricServiceClient != null) {
+      metricServiceClient.close();
+    }
+    logger.info("ProxyMetricsExporter shut down");
+  }
+
+  /**
+   * Key for grouping metrics by status code and method.
+   */
+  public static class MetricKey {
+    private final String statusCode;
+    private final String method;
+
+    public MetricKey(String statusCode, String method) {
+      this.statusCode = statusCode;
+      this.method = method;
+    }
+
+    public String getStatusCode() {
+      return statusCode;
+    }
+
+    public String getMethod() {
+      return method;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+      if (this == o) return true;
+      if (o == null || getClass() != o.getClass()) return false;
+      MetricKey that = (MetricKey) o;
+      return statusCode.equals(that.statusCode) && method.equals(that.method);
+    }
+
+    @Override
+    public int hashCode() {
+      return 31 * statusCode.hashCode() + method.hashCode();
+    }
+
+    @Override
+    public String toString() {
+      return String.format("MetricKey{status=%s, method=%s}", statusCode, method);
+    }
+  }
+}

From 795c49c74587c7b015956973b0d8437415ed1635 Mon Sep 17 00:00:00 2001
From: Pooja Bhagat <pooja.bhagat@glean.com>
Date: Mon, 29 Dec 2025 16:41:05 +0530
Subject: [PATCH 2/2] Use OpenTelemetry

---
 WORKSPACE                                     |  77 +--
 maven_install.json                            | 613 +++++++++++++++++-
 .../java/com/glean/proxy/ProxyNetworking.java |  25 +-
 .../java/com/glean/proxy/metrics/BUILD.bazel  |   6 +
 .../com/glean/proxy/metrics/MetricData.java   | 151 -----
 .../proxy/metrics/OpenTelemetrySetup.java     |  84 +++
 .../com/glean/proxy/metrics/ProxyMetrics.java |  58 +-
 .../proxy/metrics/ProxyMetricsExporter.java   | 278 --------
 8 files changed, 789 insertions(+), 503 deletions(-)
 delete mode 100644 src/main/java/com/glean/proxy/metrics/MetricData.java
 create mode 100644 src/main/java/com/glean/proxy/metrics/OpenTelemetrySetup.java
 delete mode 100644 src/main/java/com/glean/proxy/metrics/ProxyMetricsExporter.java

diff --git a/WORKSPACE b/WORKSPACE
index 4f85147..39945f6 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -1,6 +1,32 @@
 workspace(name = "com_github_gleanwork_glean-proxy")
 
+load("@aspect_bazel_lib//lib:repositories.bzl", "aspect_bazel_lib_dependencies", "aspect_bazel_lib_register_toolchains")
+load("@aspect_rules_js//js:repositories.bzl", "rules_js_dependencies")
+load("@aspect_rules_lint//format:repositories.bzl", "rules_lint_dependencies")
+load("@aspect_rules_lint//lint:pmd.bzl", "fetch_pmd")
+load("@bazel_features//:deps.bzl", "bazel_features_deps")
+load("@bazel_gazelle//:deps.bzl", "gazelle_dependencies")
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+load("@contrib_rules_jvm//:gazelle_setup.bzl", "contrib_rules_jvm_gazelle_setup")
+
+# Fetches the contrib_rules_jvm dependencies.
+# If you want to have a different version of some dependency,
+# you should fetch it *before* calling this.
+load("@contrib_rules_jvm//:repositories.bzl", "contrib_rules_jvm_deps", "contrib_rules_jvm_gazelle_deps")
+
+# Now ensure that the downloaded deps are properly configured
+load("@contrib_rules_jvm//:setup.bzl", "contrib_rules_jvm_setup")
+load("@io_bazel_rules_go//go:deps.bzl", "go_register_toolchains", "go_rules_dependencies")
+load("@maven//:defs.bzl", "pinned_maven_install")
+load("@rules_java//java:repositories.bzl", "rules_java_dependencies", "rules_java_toolchains")
+load("@rules_jvm_external//:defs.bzl", "maven_install")
+load("@rules_jvm_external//:repositories.bzl", "rules_jvm_external_deps")
+load("@rules_jvm_external//:setup.bzl", "rules_jvm_external_setup")
+load("@rules_oci//oci:dependencies.bzl", "rules_oci_dependencies")
+load("@rules_oci//oci:pull.bzl", "oci_pull")
+load("@rules_oci//oci:repositories.bzl", "oci_register_toolchains")
+load("@rules_pkg//:deps.bzl", "rules_pkg_dependencies")
+load("@rules_proto//proto:repositories.bzl", "rules_proto_dependencies")
 
 http_archive(
     name = "platforms",
@@ -18,8 +44,6 @@ http_archive(
     url = "https://github.com/bazel-contrib/bazel_features/releases/download/v1.16.0/bazel_features-v1.16.0.tar.gz",
 )
 
-load("@bazel_features//:deps.bzl", "bazel_features_deps")
-
 bazel_features_deps()
 
 http_archive(
@@ -30,8 +54,6 @@ http_archive(
     ],
 )
 
-load("@rules_pkg//:deps.bzl", "rules_pkg_dependencies")
-
 rules_pkg_dependencies()
 
 http_archive(
@@ -43,12 +65,8 @@ http_archive(
     url = "https://github.com/aspect-build/rules_lint/releases/download/v1.0.2/rules_lint-v1.0.2.tar.gz",
 )
 
-load("@aspect_rules_lint//format:repositories.bzl", "rules_lint_dependencies")
-
 rules_lint_dependencies()
 
-load("@aspect_rules_lint//lint:pmd.bzl", "fetch_pmd")
-
 fetch_pmd()
 
 http_archive(
@@ -58,8 +76,6 @@ http_archive(
     url = "https://github.com/aspect-build/bazel-lib/releases/download/v2.8.1/bazel-lib-v2.8.1.tar.gz",
 )
 
-load("@aspect_bazel_lib//lib:repositories.bzl", "aspect_bazel_lib_dependencies", "aspect_bazel_lib_register_toolchains")
-
 aspect_bazel_lib_dependencies()
 
 aspect_bazel_lib_register_toolchains()
@@ -73,8 +89,6 @@ http_archive(
     ],
 )
 
-load("@io_bazel_rules_go//go:deps.bzl", "go_register_toolchains", "go_rules_dependencies")
-
 go_rules_dependencies()
 
 go_register_toolchains(go_version = "1.23.7")
@@ -88,8 +102,6 @@ http_archive(
     ],
 )
 
-load("@bazel_gazelle//:deps.bzl", "gazelle_dependencies")
-
 gazelle_dependencies(go_sdk = "go_sdk")
 
 http_archive(
@@ -99,8 +111,6 @@ http_archive(
     url = "https://github.com/bazelbuild/rules_proto/releases/download/6.0.0/rules_proto-6.0.0.tar.gz",
 )
 
-load("@rules_proto//proto:repositories.bzl", "rules_proto_dependencies")
-
 rules_proto_dependencies()
 
 http_archive(
@@ -111,8 +121,6 @@ http_archive(
     ],
 )
 
-load("@rules_java//java:repositories.bzl", "rules_java_dependencies", "rules_java_toolchains")
-
 rules_java_dependencies()
 
 rules_java_toolchains()
@@ -140,22 +148,12 @@ http_archive(
     url = "https://github.com/bazel-contrib/rules_jvm/releases/download/v0.27.0/rules_jvm-v0.27.0.tar.gz",
 )
 
-# Fetches the contrib_rules_jvm dependencies.
-# If you want to have a different version of some dependency,
-# you should fetch it *before* calling this.
-load("@contrib_rules_jvm//:repositories.bzl", "contrib_rules_jvm_deps", "contrib_rules_jvm_gazelle_deps")
-
 contrib_rules_jvm_deps()
 
 contrib_rules_jvm_gazelle_deps()
 
-# Now ensure that the downloaded deps are properly configured
-load("@contrib_rules_jvm//:setup.bzl", "contrib_rules_jvm_setup")
-
 contrib_rules_jvm_setup()
 
-load("@contrib_rules_jvm//:gazelle_setup.bzl", "contrib_rules_jvm_gazelle_setup")
-
 contrib_rules_jvm_gazelle_setup()
 
 RULES_JVM_EXTERNAL_TAG = "6.1"
@@ -169,12 +167,8 @@ http_archive(
     url = "https://github.com/bazelbuild/rules_jvm_external/releases/download/%s/rules_jvm_external-%s.tar.gz" % (RULES_JVM_EXTERNAL_TAG, RULES_JVM_EXTERNAL_TAG),
 )
 
-load("@rules_jvm_external//:repositories.bzl", "rules_jvm_external_deps")
-
 rules_jvm_external_deps()
 
-load("@rules_jvm_external//:setup.bzl", "rules_jvm_external_setup")
-
 rules_jvm_external_setup()
 
 http_archive(
@@ -184,14 +178,10 @@ http_archive(
     url = "https://github.com/aspect-build/rules_js/releases/download/v2.3.7/rules_js-v2.3.7.tar.gz",
 )
 
-load("@aspect_rules_js//js:repositories.bzl", "rules_js_dependencies")
-
 # This pulls in nodejs env and other aspect bazel lib set up for us.
 # https://github.com/aspect-build/rules_js/blob/066df77bd0dd6247ffd9ec728bbdcf6f6203f2e0/js/repositories.bzl#L21
 rules_js_dependencies()
 
-load("@rules_jvm_external//:defs.bzl", "maven_install")
-
 maven_install(
     artifacts = [
         "org.assertj:assertj-core:3.24.2",
@@ -204,6 +194,13 @@ maven_install(
         "com.uber.nullaway:nullaway:0.10.9",
         "org.mockito:mockito-core:5.12.0",
         "org.slf4j:slf4j-jdk14:2.0.13",
+        "io.opentelemetry:opentelemetry-api:1.44.1",
+        "io.opentelemetry:opentelemetry-sdk:1.44.1",
+        "io.opentelemetry:opentelemetry-sdk-common:1.44.1",
+        "io.opentelemetry:opentelemetry-sdk-metrics:1.44.1",
+        "io.opentelemetry:opentelemetry-exporter-otlp:1.44.1",
+        "io.opentelemetry.semconv:opentelemetry-semconv:1.28.0-alpha",
+        "com.google.cloud.opentelemetry:exporter-metrics:0.33.0",
     ],
     fetch_sources = True,
     maven_install_json = "//:maven_install.json",
@@ -212,8 +209,6 @@ maven_install(
     ],
 )
 
-load("@maven//:defs.bzl", "pinned_maven_install")
-
 pinned_maven_install()
 
 http_archive(
@@ -223,16 +218,10 @@ http_archive(
     url = "https://github.com/bazel-contrib/rules_oci/releases/download/v2.0.1/rules_oci-v2.0.1.tar.gz",
 )
 
-load("@rules_oci//oci:dependencies.bzl", "rules_oci_dependencies")
-
 rules_oci_dependencies()
 
-load("@rules_oci//oci:repositories.bzl", "oci_register_toolchains")
-
 oci_register_toolchains(name = "oci")
 
-load("@rules_oci//oci:pull.bzl", "oci_pull")
-
 oci_pull(
     name = "distroless_java17",
     digest = "sha256:eba3112cc48f46e4eac153191f229baa7bd1895f9d6219b497699b803fd4b4a2",
diff --git a/maven_install.json b/maven_install.json
index db0df54..639fcb8 100755
--- a/maven_install.json
+++ b/maven_install.json
@@ -1,7 +1,7 @@
 {
   "__AUTOGENERATED_FILE_DO_NOT_MODIFY_THIS_FILE_MANUALLY": "THERE_IS_NO_DATA_ONLY_ZUUL",
-  "__INPUT_ARTIFACTS_HASH": 1879168519,
-  "__RESOLVED_ARTIFACTS_HASH": 833789247,
+  "__INPUT_ARTIFACTS_HASH": -126544629,
+  "__RESOLVED_ARTIFACTS_HASH": -711352574,
   "conflict_resolution": {
     "com.google.code.gson:gson:2.10.1": "com.google.code.gson:gson:2.11.0"
   },
@@ -27,6 +27,13 @@
       },
       "version": "2.45.1"
     },
+    "com.google.api.grpc:proto-google-iam-v1": {
+      "shasums": {
+        "jar": "9e0cc98ed7939c4c915a7f545da2a773440d566f00922dfa00f619fe63f662a1",
+        "sources": "46463a467f0d1165b77588dac46c8b112491145d8b07fdb99488c9a06c713186"
+      },
+      "version": "1.40.1"
+    },
     "com.google.api:api-common": {
       "shasums": {
         "jar": "429a441ae9b709e3e04e708efe91aaaecc24d1e6252595fbbaa7f9a2f05f992a",
@@ -69,6 +76,27 @@
       },
       "version": "1.11.0"
     },
+    "com.google.cloud.opentelemetry:exporter-metrics": {
+      "shasums": {
+        "jar": "7a9ab87683a97357a95389ff3cec9684785648076f9b158d44da3becb93bb036",
+        "sources": "1693896c58280c0583ec7d4e63dee1cc2ba8b4c8bad4b10f701cca326686018f"
+      },
+      "version": "0.33.0"
+    },
+    "com.google.cloud.opentelemetry:shared-resourcemapping": {
+      "shasums": {
+        "jar": "eea9a3e11db783626cc15dd1835c1ed09f53b70a1fca8c58bf723ce813e9f843",
+        "sources": "b772c7f966814ffa2ceb408b9ee155726c700b6f5af6ecd79ebcb21b9bc39506"
+      },
+      "version": "0.33.0"
+    },
+    "com.google.cloud:google-cloud-core": {
+      "shasums": {
+        "jar": "baa2f9768f1665b2c18cf730b863b307adeb95cf34ab9a68ad723a6c5e6a3159",
+        "sources": "1878d4414057b0b40a615f9227da4c6cb4257c3bc3467247178b34440540dee3"
+      },
+      "version": "2.44.1"
+    },
     "com.google.cloud:google-cloud-monitoring": {
       "shasums": {
         "jar": "9727aa7d94d8dd036bffccf9abc5d18970b1e5e9827896f9907f7450ed10f5e6",
@@ -160,6 +188,27 @@
       },
       "version": "1.7"
     },
+    "com.squareup.okhttp3:okhttp": {
+      "shasums": {
+        "jar": "b1050081b14bb7a3a7e55a4d3ef01b5dcfabc453b4573a4fc019767191d5f4e0",
+        "sources": "d91a769a4140e542cddbac4e67fcf279299614e8bfd53bd23b85e60c2861341c"
+      },
+      "version": "4.12.0"
+    },
+    "com.squareup.okio:okio": {
+      "shasums": {
+        "jar": "8e63292e5c53bb93c4a6b0c213e79f15990fed250c1340f1c343880e1c9c39b5",
+        "sources": "64d5b6667f064511dd93100173f735b2d5052a1c926858f4b6a05b84e825ef94"
+      },
+      "version": "3.6.0"
+    },
+    "com.squareup.okio:okio-jvm": {
+      "shasums": {
+        "jar": "67543f0736fc422ae927ed0e504b98bc5e269fda0d3500579337cb713da28412",
+        "sources": "870a42a7b468af8fd24d67b7b62e5861aab398c56f15a80b10642e7001564e2f"
+      },
+      "version": "3.6.0"
+    },
     "com.uber.nullaway:nullaway": {
       "shasums": {
         "jar": "38327fd62ceb0683881d68ee7bf97598133f0287f3c670416f50f85cf8ef418b",
@@ -528,6 +577,104 @@
       },
       "version": "0.31.1"
     },
+    "io.opentelemetry.semconv:opentelemetry-semconv": {
+      "shasums": {
+        "jar": "e8ab86e93cef09e421a6213f4cf18421fcc6e1f9cf0ab94b9a31ed4460ddf553",
+        "sources": "b0588ae0617071c30451fe0f4916b2cde7aa8d24b542ee696a7bf59f7d7f46a8"
+      },
+      "version": "1.28.0-alpha"
+    },
+    "io.opentelemetry:opentelemetry-api": {
+      "shasums": {
+        "jar": "097e2e71c8b8c813f4a13176baafbbbb124b1253f5c9fffd110bc2add74ace93",
+        "sources": "0d9d8c1391c2a8a79ebcb013f38c172ad4cbef6b52e690501e8cb55effabc9da"
+      },
+      "version": "1.44.1"
+    },
+    "io.opentelemetry:opentelemetry-api-incubator": {
+      "shasums": {
+        "jar": "8dbf451ce580fa0252ee9ca77331fd21710710ca9b735a1359241ead3be8ebe5",
+        "sources": "400ee017921af6a987de5ca9aabd2afbd2989c1f3c9eaedc4f1ff8299eace6c1"
+      },
+      "version": "1.44.1-alpha"
+    },
+    "io.opentelemetry:opentelemetry-context": {
+      "shasums": {
+        "jar": "006b3f7c3880356a86f02c40eedeba124f226a2f145fe904cc1b7def0088bab0",
+        "sources": "50f136587f0d1bf317fbfdd9cf5f589a321d7fd366e3cbea1dc511e458115324"
+      },
+      "version": "1.44.1"
+    },
+    "io.opentelemetry:opentelemetry-exporter-common": {
+      "shasums": {
+        "jar": "259b65adc1e8969804b4232529bd52cbaaabf86049c404f25bce35898023696b",
+        "sources": "160c784b8d35721b7eee04e6e06e7bdccc2cee512e648e0509c99ab0efbbe09d"
+      },
+      "version": "1.44.1"
+    },
+    "io.opentelemetry:opentelemetry-exporter-otlp": {
+      "shasums": {
+        "jar": "9384faa831f082dd10ca4b09eb1906fa2cdd8a8a0fdbfca56ebb4fb4d6e205ec",
+        "sources": "03d8e56a41bf49674ea3679d6360e0f16cfee4e7ea2c035fc9bcc81108482688"
+      },
+      "version": "1.44.1"
+    },
+    "io.opentelemetry:opentelemetry-exporter-otlp-common": {
+      "shasums": {
+        "jar": "589385cede8e974a092753d7bafbc5afd26e8eaad970e975fb51106557bdae41",
+        "sources": "b1b1b8c29eb3e119fc5cd909e1d309b75190f53724b872eaffa7229458309818"
+      },
+      "version": "1.44.1"
+    },
+    "io.opentelemetry:opentelemetry-exporter-sender-okhttp": {
+      "shasums": {
+        "jar": "7b4eaef47b9bae37cc2b6ca9975defd1d49a7de8b4a31fc2dffd582f09d8dac8",
+        "sources": "80908010581be389fb32c6388f7bb7ab3aed6a27b9e910a1805bbd7605495db3"
+      },
+      "version": "1.44.1"
+    },
+    "io.opentelemetry:opentelemetry-sdk": {
+      "shasums": {
+        "jar": "7c64f330ec197a1eb88059b97dc9376fdb9836695027c96a0cb4e74ef917cebe",
+        "sources": "567caff6fe790a8eef0195c712368c13bae2f5d69ebf51bf3f5393166be43e11"
+      },
+      "version": "1.44.1"
+    },
+    "io.opentelemetry:opentelemetry-sdk-common": {
+      "shasums": {
+        "jar": "3770fc477ee0fab21e796bb559f0a996d38c744f3a170868d1b3b85b63b827d0",
+        "sources": "e1801125d48e0ba0cb016db0cea3445aaec57c322e6765ac788e3f9b959a3ec1"
+      },
+      "version": "1.44.1"
+    },
+    "io.opentelemetry:opentelemetry-sdk-extension-autoconfigure-spi": {
+      "shasums": {
+        "jar": "f3478af96e4f2f5fd60283522553de4ce99c03606a16e460d07bc6eee12f9f95",
+        "sources": "46b251d7737595cf49cfb2f3bae905951efc4cf78085ba02c625f7fed781b89f"
+      },
+      "version": "1.44.1"
+    },
+    "io.opentelemetry:opentelemetry-sdk-logs": {
+      "shasums": {
+        "jar": "ba4a97966ded2927dcaae6e91bf0a1707867e44cc3dd2ae4c7ef8214bdf8daf7",
+        "sources": "f6c63d81b3189fe1a76a712f4eff11b60300c093ce4d65ad73fee5b811648ca6"
+      },
+      "version": "1.44.1"
+    },
+    "io.opentelemetry:opentelemetry-sdk-metrics": {
+      "shasums": {
+        "jar": "3c09668a96f1e9443d2894ae456674c8c38b221c096c391fc81616daa672bf68",
+        "sources": "afe4b9c4cb2328bb2180cf4bc280293191eb3ab8b4165ab725bab9e73a194a1b"
+      },
+      "version": "1.44.1"
+    },
+    "io.opentelemetry:opentelemetry-sdk-trace": {
+      "shasums": {
+        "jar": "ff013ab945567dccb5dde638f7a366519defbd2d138df1370936e847ef608c87",
+        "sources": "24f7b867a0f2f3203e4eb2069137bbd01936e7df7d08d3ec2dfcad478444ae27"
+      },
+      "version": "1.44.1"
+    },
     "io.perfmark:perfmark-api": {
       "shasums": {
         "jar": "c7b478503ec524e55df19b424d46d27c8a68aeb801664fadd4f069b71f52d0f6",
@@ -612,6 +759,41 @@
       },
       "version": "2.5.2"
     },
+    "org.jetbrains.kotlin:kotlin-stdlib": {
+      "shasums": {
+        "jar": "55e989c512b80907799f854309f3bc7782c5b3d13932442d0379d5c472711504",
+        "sources": "4dad0d6fe62c142313e09e3b693c9dccc6bf9dc7a56a37c91be9edb7de0cf45b"
+      },
+      "version": "1.9.10"
+    },
+    "org.jetbrains.kotlin:kotlin-stdlib-common": {
+      "shasums": {
+        "jar": "cde3341ba18a2ba262b0b7cf6c55b20c90e8d434e42c9a13e6a3f770db965a88",
+        "sources": "63f2b6dfd58e3e1c82a4b37a2e1743996ca182bf44dc2aadd264b8fb95fddcd3"
+      },
+      "version": "1.9.10"
+    },
+    "org.jetbrains.kotlin:kotlin-stdlib-jdk7": {
+      "shasums": {
+        "jar": "ac6361bf9ad1ed382c2103d9712c47cdec166232b4903ed596e8876b0681c9b7",
+        "sources": "ea10d3e5e6e695d8a5283cbf116321acae6ba42d0bdd3eda50f7c34a26fa25cb"
+      },
+      "version": "1.9.10"
+    },
+    "org.jetbrains.kotlin:kotlin-stdlib-jdk8": {
+      "shasums": {
+        "jar": "a4c74d94d64ce1abe53760fe0389dd941f6fc558d0dab35e47c085a11ec80f28",
+        "sources": "40e9a80f6b953d12389623760d438e69914098d0c4d7053f70f90533ec041259"
+      },
+      "version": "1.9.10"
+    },
+    "org.jetbrains:annotations": {
+      "shasums": {
+        "jar": "ace2a10dc8e2d5fd34925ecac03e4988b2c0f851650c94b8cef49ba1bd111478",
+        "sources": "42a5e144b8e81d50d6913d1007b695e62e614705268d8cf9f13dbdc478c2c68e"
+      },
+      "version": "13.0"
+    },
     "org.mockito:mockito-core": {
       "shasums": {
         "jar": "4a2eb29237050da749e90a46f948bce7e26ec22b671e41f59b1ac6f4b6408229",
@@ -659,6 +841,67 @@
       "javax.annotation:javax.annotation-api",
       "org.checkerframework:checker-qual"
     ],
+    "com.google.api.grpc:proto-google-common-protos": [
+      "com.google.protobuf:protobuf-java"
+    ],
+    "com.google.api.grpc:proto-google-iam-v1": [
+      "com.google.api.grpc:proto-google-common-protos",
+      "com.google.protobuf:protobuf-java"
+    ],
+    "com.google.api:api-common": [
+      "com.google.auto.value:auto-value-annotations",
+      "com.google.code.findbugs:jsr305",
+      "com.google.errorprone:error_prone_annotations",
+      "com.google.guava:guava",
+      "com.google.j2objc:j2objc-annotations",
+      "javax.annotation:javax.annotation-api"
+    ],
+    "com.google.api:gax": [
+      "com.google.api.grpc:proto-google-common-protos",
+      "com.google.api:api-common",
+      "com.google.auth:google-auth-library-credentials",
+      "com.google.auth:google-auth-library-oauth2-http",
+      "com.google.guava:guava",
+      "com.google.protobuf:protobuf-java",
+      "io.opencensus:opencensus-api",
+      "org.threeten:threetenbp"
+    ],
+    "com.google.auth:google-auth-library-oauth2-http": [
+      "com.google.auth:google-auth-library-credentials",
+      "com.google.auto.value:auto-value-annotations",
+      "com.google.code.findbugs:jsr305",
+      "com.google.errorprone:error_prone_annotations",
+      "com.google.guava:guava",
+      "com.google.http-client:google-http-client",
+      "com.google.http-client:google-http-client-gson"
+    ],
+    "com.google.cloud.opentelemetry:exporter-metrics": [
+      "com.google.auto.value:auto-value-annotations",
+      "com.google.cloud.opentelemetry:shared-resourcemapping",
+      "com.google.cloud:google-cloud-core",
+      "com.google.cloud:google-cloud-monitoring",
+      "io.opentelemetry.semconv:opentelemetry-semconv",
+      "io.opentelemetry:opentelemetry-api",
+      "io.opentelemetry:opentelemetry-sdk-metrics",
+      "org.slf4j:slf4j-api"
+    ],
+    "com.google.cloud:google-cloud-core": [
+      "com.google.api.grpc:proto-google-common-protos",
+      "com.google.api.grpc:proto-google-iam-v1",
+      "com.google.api:api-common",
+      "com.google.api:gax",
+      "com.google.auth:google-auth-library-credentials",
+      "com.google.auth:google-auth-library-oauth2-http",
+      "com.google.auto.value:auto-value-annotations",
+      "com.google.code.findbugs:jsr305",
+      "com.google.errorprone:error_prone_annotations",
+      "com.google.guava:guava",
+      "com.google.http-client:google-http-client",
+      "com.google.http-client:google-http-client-gson",
+      "com.google.protobuf:protobuf-java",
+      "com.google.protobuf:protobuf-java-util",
+      "org.threeten:threetenbp"
+    ],
     "com.google.cloud:google-cloud-monitoring": [
       "com.google.android:annotations",
       "com.google.api.grpc:proto-google-cloud-monitoring-v3",
@@ -718,6 +961,40 @@
       "com.google.j2objc:j2objc-annotations",
       "org.checkerframework:checker-qual"
     ],
+    "com.google.http-client:google-http-client": [
+      "com.google.code.findbugs:jsr305",
+      "com.google.errorprone:error_prone_annotations",
+      "com.google.guava:guava",
+      "com.google.j2objc:j2objc-annotations",
+      "io.grpc:grpc-context",
+      "io.opencensus:opencensus-api",
+      "io.opencensus:opencensus-contrib-http-util",
+      "org.apache.httpcomponents:httpclient",
+      "org.apache.httpcomponents:httpcore"
+    ],
+    "com.google.http-client:google-http-client-gson": [
+      "com.google.code.gson:gson",
+      "com.google.http-client:google-http-client"
+    ],
+    "com.google.protobuf:protobuf-java-util": [
+      "com.google.code.findbugs:jsr305",
+      "com.google.code.gson:gson",
+      "com.google.errorprone:error_prone_annotations",
+      "com.google.guava:guava",
+      "com.google.j2objc:j2objc-annotations",
+      "com.google.protobuf:protobuf-java"
+    ],
+    "com.squareup.okhttp3:okhttp": [
+      "com.squareup.okio:okio",
+      "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
+    ],
+    "com.squareup.okio:okio": [
+      "com.squareup.okio:okio-jvm"
+    ],
+    "com.squareup.okio:okio-jvm": [
+      "org.jetbrains.kotlin:kotlin-stdlib-common",
+      "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
+    ],
     "com.uber.nullaway:nullaway": [
       "com.google.guava:guava",
       "org.checkerframework:dataflow-nullaway"
@@ -728,6 +1005,9 @@
       "org.apache.commons:commons-lang3",
       "org.slf4j:slf4j-api"
     ],
+    "io.grpc:grpc-context": [
+      "io.grpc:grpc-api"
+    ],
     "io.netty:netty-all": [
       "io.netty:netty-buffer",
       "io.netty:netty-codec",
@@ -873,6 +1153,68 @@
       "io.netty:netty-common",
       "io.netty:netty-transport"
     ],
+    "io.opencensus:opencensus-api": [
+      "io.grpc:grpc-context"
+    ],
+    "io.opencensus:opencensus-contrib-http-util": [
+      "com.google.guava:guava",
+      "io.opencensus:opencensus-api"
+    ],
+    "io.opentelemetry:opentelemetry-api": [
+      "io.opentelemetry:opentelemetry-context"
+    ],
+    "io.opentelemetry:opentelemetry-api-incubator": [
+      "io.opentelemetry:opentelemetry-api"
+    ],
+    "io.opentelemetry:opentelemetry-exporter-common": [
+      "io.opentelemetry:opentelemetry-api",
+      "io.opentelemetry:opentelemetry-sdk-extension-autoconfigure-spi"
+    ],
+    "io.opentelemetry:opentelemetry-exporter-otlp": [
+      "io.opentelemetry:opentelemetry-exporter-otlp-common",
+      "io.opentelemetry:opentelemetry-exporter-sender-okhttp",
+      "io.opentelemetry:opentelemetry-sdk-extension-autoconfigure-spi",
+      "io.opentelemetry:opentelemetry-sdk-logs",
+      "io.opentelemetry:opentelemetry-sdk-metrics",
+      "io.opentelemetry:opentelemetry-sdk-trace"
+    ],
+    "io.opentelemetry:opentelemetry-exporter-otlp-common": [
+      "io.opentelemetry:opentelemetry-api-incubator",
+      "io.opentelemetry:opentelemetry-exporter-common"
+    ],
+    "io.opentelemetry:opentelemetry-exporter-sender-okhttp": [
+      "com.squareup.okhttp3:okhttp",
+      "io.opentelemetry:opentelemetry-exporter-common",
+      "io.opentelemetry:opentelemetry-sdk-common"
+    ],
+    "io.opentelemetry:opentelemetry-sdk": [
+      "io.opentelemetry:opentelemetry-api",
+      "io.opentelemetry:opentelemetry-sdk-common",
+      "io.opentelemetry:opentelemetry-sdk-logs",
+      "io.opentelemetry:opentelemetry-sdk-metrics",
+      "io.opentelemetry:opentelemetry-sdk-trace"
+    ],
+    "io.opentelemetry:opentelemetry-sdk-common": [
+      "io.opentelemetry:opentelemetry-api"
+    ],
+    "io.opentelemetry:opentelemetry-sdk-extension-autoconfigure-spi": [
+      "io.opentelemetry:opentelemetry-sdk"
+    ],
+    "io.opentelemetry:opentelemetry-sdk-logs": [
+      "io.opentelemetry:opentelemetry-api",
+      "io.opentelemetry:opentelemetry-api-incubator",
+      "io.opentelemetry:opentelemetry-sdk-common"
+    ],
+    "io.opentelemetry:opentelemetry-sdk-metrics": [
+      "io.opentelemetry:opentelemetry-api",
+      "io.opentelemetry:opentelemetry-api-incubator",
+      "io.opentelemetry:opentelemetry-sdk-common"
+    ],
+    "io.opentelemetry:opentelemetry-sdk-trace": [
+      "io.opentelemetry:opentelemetry-api",
+      "io.opentelemetry:opentelemetry-api-incubator",
+      "io.opentelemetry:opentelemetry-sdk-common"
+    ],
     "org.apache.httpcomponents:httpclient": [
       "commons-codec:commons-codec",
       "commons-logging:commons-logging",
@@ -881,6 +1223,17 @@
     "org.assertj:assertj-core": [
       "net.bytebuddy:byte-buddy"
     ],
+    "org.jetbrains.kotlin:kotlin-stdlib": [
+      "org.jetbrains.kotlin:kotlin-stdlib-common",
+      "org.jetbrains:annotations"
+    ],
+    "org.jetbrains.kotlin:kotlin-stdlib-jdk7": [
+      "org.jetbrains.kotlin:kotlin-stdlib"
+    ],
+    "org.jetbrains.kotlin:kotlin-stdlib-jdk8": [
+      "org.jetbrains.kotlin:kotlin-stdlib",
+      "org.jetbrains.kotlin:kotlin-stdlib-jdk7"
+    ],
     "org.mockito:mockito-core": [
       "net.bytebuddy:byte-buddy",
       "net.bytebuddy:byte-buddy-agent",
@@ -915,6 +1268,10 @@
       "com.google.shopping.type",
       "com.google.type"
     ],
+    "com.google.api.grpc:proto-google-iam-v1": [
+      "com.google.iam.v1",
+      "com.google.iam.v1.logging"
+    ],
     "com.google.api:api-common": [
       "com.google.api.core",
       "com.google.api.pathtemplate",
@@ -952,6 +1309,18 @@
       "com.google.auto.value.extension.serializable",
       "com.google.auto.value.extension.toprettystring"
     ],
+    "com.google.cloud.opentelemetry:exporter-metrics": [
+      "com.google.cloud.opentelemetry.metric"
+    ],
+    "com.google.cloud.opentelemetry:shared-resourcemapping": [
+      "com.google.cloud.opentelemetry.resource",
+      "com.google.cloud.opentelemetry.shadow.semconv"
+    ],
+    "com.google.cloud:google-cloud-core": [
+      "com.google.cloud",
+      "com.google.cloud.spi",
+      "com.google.cloud.testing"
+    ],
     "com.google.cloud:google-cloud-monitoring": [
       "com.google.cloud.monitoring.v3",
       "com.google.cloud.monitoring.v3.stub"
@@ -1033,6 +1402,29 @@
     "com.google.re2j:re2j": [
       "com.google.re2j"
     ],
+    "com.squareup.okhttp3:okhttp": [
+      "okhttp3",
+      "okhttp3.internal",
+      "okhttp3.internal.authenticator",
+      "okhttp3.internal.cache",
+      "okhttp3.internal.cache2",
+      "okhttp3.internal.concurrent",
+      "okhttp3.internal.connection",
+      "okhttp3.internal.http",
+      "okhttp3.internal.http1",
+      "okhttp3.internal.http2",
+      "okhttp3.internal.io",
+      "okhttp3.internal.platform",
+      "okhttp3.internal.platform.android",
+      "okhttp3.internal.proxy",
+      "okhttp3.internal.publicsuffix",
+      "okhttp3.internal.tls",
+      "okhttp3.internal.ws"
+    ],
+    "com.squareup.okio:okio-jvm": [
+      "okio",
+      "okio.internal"
+    ],
     "com.uber.nullaway:nullaway": [
       "com.uber.nullaway",
       "com.uber.nullaway.annotations",
@@ -1402,6 +1794,122 @@
       "io.opencensus.contrib.http",
       "io.opencensus.contrib.http.util"
     ],
+    "io.opentelemetry.semconv:opentelemetry-semconv": [
+      "io.opentelemetry.semconv"
+    ],
+    "io.opentelemetry:opentelemetry-api": [
+      "io.opentelemetry.api",
+      "io.opentelemetry.api.baggage",
+      "io.opentelemetry.api.baggage.propagation",
+      "io.opentelemetry.api.common",
+      "io.opentelemetry.api.internal",
+      "io.opentelemetry.api.logs",
+      "io.opentelemetry.api.metrics",
+      "io.opentelemetry.api.trace",
+      "io.opentelemetry.api.trace.propagation",
+      "io.opentelemetry.api.trace.propagation.internal"
+    ],
+    "io.opentelemetry:opentelemetry-api-incubator": [
+      "io.opentelemetry.api.incubator.events",
+      "io.opentelemetry.api.incubator.logs",
+      "io.opentelemetry.api.incubator.metrics",
+      "io.opentelemetry.api.incubator.propagation",
+      "io.opentelemetry.api.incubator.trace"
+    ],
+    "io.opentelemetry:opentelemetry-context": [
+      "io.opentelemetry.context",
+      "io.opentelemetry.context.internal.shaded",
+      "io.opentelemetry.context.propagation"
+    ],
+    "io.opentelemetry:opentelemetry-exporter-common": [
+      "io.opentelemetry.exporter.internal",
+      "io.opentelemetry.exporter.internal.auth",
+      "io.opentelemetry.exporter.internal.compression",
+      "io.opentelemetry.exporter.internal.grpc",
+      "io.opentelemetry.exporter.internal.http",
+      "io.opentelemetry.exporter.internal.marshal"
+    ],
+    "io.opentelemetry:opentelemetry-exporter-otlp": [
+      "io.opentelemetry.exporter.otlp.all.internal",
+      "io.opentelemetry.exporter.otlp.http.logs",
+      "io.opentelemetry.exporter.otlp.http.metrics",
+      "io.opentelemetry.exporter.otlp.http.trace",
+      "io.opentelemetry.exporter.otlp.internal",
+      "io.opentelemetry.exporter.otlp.logs",
+      "io.opentelemetry.exporter.otlp.metrics",
+      "io.opentelemetry.exporter.otlp.trace"
+    ],
+    "io.opentelemetry:opentelemetry-exporter-otlp-common": [
+      "io.opentelemetry.exporter.internal.otlp",
+      "io.opentelemetry.exporter.internal.otlp.logs",
+      "io.opentelemetry.exporter.internal.otlp.metrics",
+      "io.opentelemetry.exporter.internal.otlp.traces",
+      "io.opentelemetry.proto.collector.logs.v1.internal",
+      "io.opentelemetry.proto.collector.metrics.v1.internal",
+      "io.opentelemetry.proto.collector.profiles.v1experimental.internal",
+      "io.opentelemetry.proto.collector.trace.v1.internal",
+      "io.opentelemetry.proto.common.v1.internal",
+      "io.opentelemetry.proto.logs.v1.internal",
+      "io.opentelemetry.proto.metrics.v1.internal",
+      "io.opentelemetry.proto.profiles.v1experimental.internal",
+      "io.opentelemetry.proto.resource.v1.internal",
+      "io.opentelemetry.proto.trace.v1.internal"
+    ],
+    "io.opentelemetry:opentelemetry-exporter-sender-okhttp": [
+      "io.opentelemetry.exporter.sender.okhttp.internal"
+    ],
+    "io.opentelemetry:opentelemetry-sdk": [
+      "io.opentelemetry.sdk"
+    ],
+    "io.opentelemetry:opentelemetry-sdk-common": [
+      "io.opentelemetry.sdk.common",
+      "io.opentelemetry.sdk.common.export",
+      "io.opentelemetry.sdk.common.internal",
+      "io.opentelemetry.sdk.internal",
+      "io.opentelemetry.sdk.resources"
+    ],
+    "io.opentelemetry:opentelemetry-sdk-extension-autoconfigure-spi": [
+      "io.opentelemetry.sdk.autoconfigure.spi",
+      "io.opentelemetry.sdk.autoconfigure.spi.internal",
+      "io.opentelemetry.sdk.autoconfigure.spi.logs",
+      "io.opentelemetry.sdk.autoconfigure.spi.metrics",
+      "io.opentelemetry.sdk.autoconfigure.spi.traces"
+    ],
+    "io.opentelemetry:opentelemetry-sdk-logs": [
+      "io.opentelemetry.sdk.logs",
+      "io.opentelemetry.sdk.logs.data",
+      "io.opentelemetry.sdk.logs.export",
+      "io.opentelemetry.sdk.logs.internal"
+    ],
+    "io.opentelemetry:opentelemetry-sdk-metrics": [
+      "io.opentelemetry.sdk.metrics",
+      "io.opentelemetry.sdk.metrics.data",
+      "io.opentelemetry.sdk.metrics.export",
+      "io.opentelemetry.sdk.metrics.internal",
+      "io.opentelemetry.sdk.metrics.internal.aggregator",
+      "io.opentelemetry.sdk.metrics.internal.concurrent",
+      "io.opentelemetry.sdk.metrics.internal.data",
+      "io.opentelemetry.sdk.metrics.internal.debug",
+      "io.opentelemetry.sdk.metrics.internal.descriptor",
+      "io.opentelemetry.sdk.metrics.internal.exemplar",
+      "io.opentelemetry.sdk.metrics.internal.export",
+      "io.opentelemetry.sdk.metrics.internal.state",
+      "io.opentelemetry.sdk.metrics.internal.view"
+    ],
+    "io.opentelemetry:opentelemetry-sdk-trace": [
+      "io.opentelemetry.internal.shaded.jctools.counters",
+      "io.opentelemetry.internal.shaded.jctools.maps",
+      "io.opentelemetry.internal.shaded.jctools.queues",
+      "io.opentelemetry.internal.shaded.jctools.queues.atomic",
+      "io.opentelemetry.internal.shaded.jctools.queues.atomic.unpadded",
+      "io.opentelemetry.internal.shaded.jctools.queues.unpadded",
+      "io.opentelemetry.internal.shaded.jctools.util",
+      "io.opentelemetry.sdk.trace",
+      "io.opentelemetry.sdk.trace.data",
+      "io.opentelemetry.sdk.trace.export",
+      "io.opentelemetry.sdk.trace.internal",
+      "io.opentelemetry.sdk.trace.samplers"
+    ],
     "io.perfmark:perfmark-api": [
       "io.perfmark"
     ],
@@ -1640,6 +2148,55 @@
       "org.conscrypt.ct",
       "org.conscrypt.io"
     ],
+    "org.jetbrains.kotlin:kotlin-stdlib": [
+      "kotlin",
+      "kotlin.annotation",
+      "kotlin.collections",
+      "kotlin.collections.builders",
+      "kotlin.collections.jdk8",
+      "kotlin.collections.unsigned",
+      "kotlin.comparisons",
+      "kotlin.concurrent",
+      "kotlin.contracts",
+      "kotlin.coroutines",
+      "kotlin.coroutines.cancellation",
+      "kotlin.coroutines.intrinsics",
+      "kotlin.coroutines.jvm.internal",
+      "kotlin.enums",
+      "kotlin.experimental",
+      "kotlin.internal",
+      "kotlin.internal.jdk7",
+      "kotlin.internal.jdk8",
+      "kotlin.io",
+      "kotlin.io.encoding",
+      "kotlin.io.path",
+      "kotlin.jdk7",
+      "kotlin.js",
+      "kotlin.jvm",
+      "kotlin.jvm.functions",
+      "kotlin.jvm.internal",
+      "kotlin.jvm.internal.markers",
+      "kotlin.jvm.internal.unsafe",
+      "kotlin.jvm.jdk8",
+      "kotlin.jvm.optionals",
+      "kotlin.math",
+      "kotlin.properties",
+      "kotlin.random",
+      "kotlin.random.jdk8",
+      "kotlin.ranges",
+      "kotlin.reflect",
+      "kotlin.sequences",
+      "kotlin.streams.jdk8",
+      "kotlin.system",
+      "kotlin.text",
+      "kotlin.text.jdk8",
+      "kotlin.time",
+      "kotlin.time.jdk8"
+    ],
+    "org.jetbrains:annotations": [
+      "org.intellij.lang.annotations",
+      "org.jetbrains.annotations"
+    ],
     "org.mockito:mockito-core": [
       "org.mockito",
       "org.mockito.codegen",
@@ -1744,6 +2301,8 @@
       "com.google.api.grpc:proto-google-cloud-monitoring-v3:jar:sources",
       "com.google.api.grpc:proto-google-common-protos",
       "com.google.api.grpc:proto-google-common-protos:jar:sources",
+      "com.google.api.grpc:proto-google-iam-v1",
+      "com.google.api.grpc:proto-google-iam-v1:jar:sources",
       "com.google.api:api-common",
       "com.google.api:api-common:jar:sources",
       "com.google.api:gax",
@@ -1756,6 +2315,12 @@
       "com.google.auth:google-auth-library-oauth2-http:jar:sources",
       "com.google.auto.value:auto-value-annotations",
       "com.google.auto.value:auto-value-annotations:jar:sources",
+      "com.google.cloud.opentelemetry:exporter-metrics",
+      "com.google.cloud.opentelemetry:exporter-metrics:jar:sources",
+      "com.google.cloud.opentelemetry:shared-resourcemapping",
+      "com.google.cloud.opentelemetry:shared-resourcemapping:jar:sources",
+      "com.google.cloud:google-cloud-core",
+      "com.google.cloud:google-cloud-core:jar:sources",
       "com.google.cloud:google-cloud-monitoring",
       "com.google.cloud:google-cloud-monitoring:jar:sources",
       "com.google.code.findbugs:jsr305",
@@ -1781,6 +2346,12 @@
       "com.google.protobuf:protobuf-java:jar:sources",
       "com.google.re2j:re2j",
       "com.google.re2j:re2j:jar:sources",
+      "com.squareup.okhttp3:okhttp",
+      "com.squareup.okhttp3:okhttp:jar:sources",
+      "com.squareup.okio:okio",
+      "com.squareup.okio:okio-jvm",
+      "com.squareup.okio:okio-jvm:jar:sources",
+      "com.squareup.okio:okio:jar:sources",
       "com.uber.nullaway:nullaway",
       "com.uber.nullaway:nullaway:jar:sources",
       "commons-codec:commons-codec",
@@ -1888,6 +2459,34 @@
       "io.opencensus:opencensus-api:jar:sources",
       "io.opencensus:opencensus-contrib-http-util",
       "io.opencensus:opencensus-contrib-http-util:jar:sources",
+      "io.opentelemetry.semconv:opentelemetry-semconv",
+      "io.opentelemetry.semconv:opentelemetry-semconv:jar:sources",
+      "io.opentelemetry:opentelemetry-api",
+      "io.opentelemetry:opentelemetry-api-incubator",
+      "io.opentelemetry:opentelemetry-api-incubator:jar:sources",
+      "io.opentelemetry:opentelemetry-api:jar:sources",
+      "io.opentelemetry:opentelemetry-context",
+      "io.opentelemetry:opentelemetry-context:jar:sources",
+      "io.opentelemetry:opentelemetry-exporter-common",
+      "io.opentelemetry:opentelemetry-exporter-common:jar:sources",
+      "io.opentelemetry:opentelemetry-exporter-otlp",
+      "io.opentelemetry:opentelemetry-exporter-otlp-common",
+      "io.opentelemetry:opentelemetry-exporter-otlp-common:jar:sources",
+      "io.opentelemetry:opentelemetry-exporter-otlp:jar:sources",
+      "io.opentelemetry:opentelemetry-exporter-sender-okhttp",
+      "io.opentelemetry:opentelemetry-exporter-sender-okhttp:jar:sources",
+      "io.opentelemetry:opentelemetry-sdk",
+      "io.opentelemetry:opentelemetry-sdk-common",
+      "io.opentelemetry:opentelemetry-sdk-common:jar:sources",
+      "io.opentelemetry:opentelemetry-sdk-extension-autoconfigure-spi",
+      "io.opentelemetry:opentelemetry-sdk-extension-autoconfigure-spi:jar:sources",
+      "io.opentelemetry:opentelemetry-sdk-logs",
+      "io.opentelemetry:opentelemetry-sdk-logs:jar:sources",
+      "io.opentelemetry:opentelemetry-sdk-metrics",
+      "io.opentelemetry:opentelemetry-sdk-metrics:jar:sources",
+      "io.opentelemetry:opentelemetry-sdk-trace",
+      "io.opentelemetry:opentelemetry-sdk-trace:jar:sources",
+      "io.opentelemetry:opentelemetry-sdk:jar:sources",
       "io.perfmark:perfmark-api",
       "io.perfmark:perfmark-api:jar:sources",
       "javax.annotation:javax.annotation-api",
@@ -1912,6 +2511,16 @@
       "org.codehaus.mojo:animal-sniffer-annotations:jar:sources",
       "org.conscrypt:conscrypt-openjdk-uber",
       "org.conscrypt:conscrypt-openjdk-uber:jar:sources",
+      "org.jetbrains.kotlin:kotlin-stdlib",
+      "org.jetbrains.kotlin:kotlin-stdlib-common",
+      "org.jetbrains.kotlin:kotlin-stdlib-common:jar:sources",
+      "org.jetbrains.kotlin:kotlin-stdlib-jdk7",
+      "org.jetbrains.kotlin:kotlin-stdlib-jdk7:jar:sources",
+      "org.jetbrains.kotlin:kotlin-stdlib-jdk8",
+      "org.jetbrains.kotlin:kotlin-stdlib-jdk8:jar:sources",
+      "org.jetbrains.kotlin:kotlin-stdlib:jar:sources",
+      "org.jetbrains:annotations",
+      "org.jetbrains:annotations:jar:sources",
       "org.mockito:mockito-core",
       "org.mockito:mockito-core:jar:sources",
       "org.objenesis:objenesis",
diff --git a/src/main/java/com/glean/proxy/ProxyNetworking.java b/src/main/java/com/glean/proxy/ProxyNetworking.java
index 86262d3..ec868eb 100644
--- a/src/main/java/com/glean/proxy/ProxyNetworking.java
+++ b/src/main/java/com/glean/proxy/ProxyNetworking.java
@@ -1,9 +1,8 @@
 package com.glean.proxy;
 
+import com.glean.proxy.metrics.OpenTelemetrySetup;
 import com.glean.proxy.metrics.ProxyMetrics;
-import com.glean.proxy.metrics.ProxyMetricsExporter;
 import java.net.InetSocketAddress;
-import java.time.Clock;
 import java.util.logging.Logger;
 import org.littleshoot.proxy.ChainedProxyManager;
 import org.littleshoot.proxy.HttpProxyServer;
@@ -12,7 +11,7 @@
 
 public class ProxyNetworking {
   private static final Logger logger = Logger.getLogger(ProxyNetworking.class.getName());
-  private static ProxyMetricsExporter metricsExporter;
+  private static OpenTelemetrySetup openTelemetrySetup;
 
   protected final ThreadPoolConfiguration threadPoolConfiguration;
   protected final FilterConfiguration filterConfiguration;
@@ -73,6 +72,10 @@ public ProxyNetworking build() {
       if (threadPoolConfiguration == null) {
         threadPoolConfiguration = createThreadPoolConfigurationFromEnvironment();
       }
+
+      // Initialize metrics exporter before filter configuration, since filters use ProxyMetrics
+      initializeMetricsExporter();
+
       if (filterConfiguration == null) {
         filterConfiguration = FilterConfiguration.fromEnvironment();
       }
@@ -80,9 +83,6 @@ public ProxyNetworking build() {
         chainedProxyManager = ChainedProxyConfiguration.fromEnvironment();
       }
 
-      // Initialize metrics exporter
-      initializeMetricsExporter();
-
       return new ProxyNetworking(this);
     }
   }
@@ -91,26 +91,23 @@ private static void initializeMetricsExporter() {
     String gcpProjectId = System.getenv("GCP_PROJECT_ID");
     String enableMetricsExport = System.getenv("ENABLE_METRICS_EXPORT");
 
-    // Always initialize ProxyMetrics for local tracking
-    ProxyMetrics metrics = ProxyMetrics.getInstance();
-
     // Check if metrics export is explicitly disabled
     if (enableMetricsExport != null &&
         (enableMetricsExport.equalsIgnoreCase("false") || enableMetricsExport.equals("0"))) {
-      logger.info("Metrics export disabled via ENABLE_METRICS_EXPORT. Metrics will be tracked locally only.");
+      logger.info("Metrics export disabled via ENABLE_METRICS_EXPORT.");
       return;
     }
 
     if (gcpProjectId == null || gcpProjectId.isEmpty()) {
-      logger.warning("GCP_PROJECT_ID not set. Metrics will be tracked but not exported to Cloud Monitoring.");
+      logger.warning("Set GCP_PROJECT_ID environment variable to enable metric export.");
       return;
     }
 
     try {
-      logger.info("Initializing ProxyMetricsExporter for project: " + gcpProjectId);
-      metricsExporter = new ProxyMetricsExporter(gcpProjectId, Clock.systemUTC(), metrics.getMetrics());
+      openTelemetrySetup = new OpenTelemetrySetup(gcpProjectId);
+      ProxyMetrics.initialize(openTelemetrySetup.getMeter());
     } catch (Exception e) {
-      logger.severe("Failed to initialize ProxyMetricsExporter: " + e.getMessage());
+      logger.severe("Failed to initialize OpenTelemetry: " + e.getMessage());
     }
   }
 
diff --git a/src/main/java/com/glean/proxy/metrics/BUILD.bazel b/src/main/java/com/glean/proxy/metrics/BUILD.bazel
index 56061e3..aba2147 100644
--- a/src/main/java/com/glean/proxy/metrics/BUILD.bazel
+++ b/src/main/java/com/glean/proxy/metrics/BUILD.bazel
@@ -11,6 +11,12 @@ java_library(
         "@maven//:com_google_api_grpc_proto_google_cloud_monitoring_v3",
         "@maven//:com_google_api_grpc_proto_google_common_protos",
         "@maven//:com_google_cloud_google_cloud_monitoring",
+        "@maven//:com_google_cloud_opentelemetry_exporter_metrics",
         "@maven//:com_google_protobuf_protobuf_java",
+        "@maven//:io_opentelemetry_opentelemetry_api",
+        "@maven//:io_opentelemetry_opentelemetry_sdk",
+        "@maven//:io_opentelemetry_opentelemetry_sdk_common",
+        "@maven//:io_opentelemetry_opentelemetry_sdk_metrics",
+        "@maven//:io_opentelemetry_semconv_opentelemetry_semconv",
     ],
 )
diff --git a/src/main/java/com/glean/proxy/metrics/MetricData.java b/src/main/java/com/glean/proxy/metrics/MetricData.java
deleted file mode 100644
index abdd27b..0000000
--- a/src/main/java/com/glean/proxy/metrics/MetricData.java
+++ /dev/null
@@ -1,151 +0,0 @@
-package com.glean.proxy.metrics;
-
-import java.util.Objects;
-import java.util.concurrent.atomic.AtomicLong;
-
-/**
- * Stores aggregated metric data for a specific tag combination.
- * Thread-safe using atomic operations.
- */
-public class MetricData {
-  // Latency bucket boundaries in milliseconds
-  // Creates buckets: [0,10), [10,25), [25,50), [50,100), [100,250), [250,500),
-  //                  [500,1000), [1000,2500), [2500,5000), [5000,10000), [10000,∞)
-  public static final double[] BUCKET_BOUNDS = {
-    0, 10, 25, 50, 100, 250, 500, 1000, 2500, 5000, 10000
-  };
-
-  private final String statusCode;
-  private final String method;
-  private final AtomicLong count = new AtomicLong(0);
-  private final AtomicLong totalLatencyMs = new AtomicLong(0);
-  private final AtomicLong minLatencyMs = new AtomicLong(Long.MAX_VALUE);
-  private final AtomicLong maxLatencyMs = new AtomicLong(0);
-
-  // Histogram buckets: one more than bounds (for overflow bucket)
-  private final AtomicLong[] bucketCounts = new AtomicLong[BUCKET_BOUNDS.length + 1];
-
-  public MetricData(String statusCode, String method) {
-    this.statusCode = statusCode;
-    this.method = method;
-
-    // Initialize bucket counters
-    for (int i = 0; i < bucketCounts.length; i++) {
-      bucketCounts[i] = new AtomicLong(0);
-    }
-  }
-
-  public void record(long latencyMs) {
-    count.incrementAndGet();
-    totalLatencyMs.addAndGet(latencyMs);
-
-    // Update histogram bucket
-    int bucketIndex = findBucketIndex(latencyMs);
-    bucketCounts[bucketIndex].incrementAndGet();
-
-    // Update min
-    long currentMin = minLatencyMs.get();
-    while (latencyMs < currentMin) {
-      if (minLatencyMs.compareAndSet(currentMin, latencyMs)) {
-        break;
-      }
-      currentMin = minLatencyMs.get();
-    }
-
-    // Update max
-    long currentMax = maxLatencyMs.get();
-    while (latencyMs > currentMax) {
-      if (maxLatencyMs.compareAndSet(currentMax, latencyMs)) {
-        break;
-      }
-      currentMax = maxLatencyMs.get();
-    }
-  }
-
-  private int findBucketIndex(long latencyMs) {
-    for (int i = 0; i < BUCKET_BOUNDS.length; i++) {
-      if (latencyMs < BUCKET_BOUNDS[i]) {
-        return i;
-      }
-    }
-    // Overflow bucket (values >= last bound)
-    return BUCKET_BOUNDS.length;
-  }
-
-  public String getStatusCode() {
-    return statusCode;
-  }
-
-  public String getMethod() {
-    return method;
-  }
-
-  public long getCount() {
-    return count.get();
-  }
-
-  public long getTotalLatencyMs() {
-    return totalLatencyMs.get();
-  }
-
-  public long getMinLatencyMs() {
-    long min = minLatencyMs.get();
-    return min == Long.MAX_VALUE ? 0 : min;
-  }
-
-  public long getMaxLatencyMs() {
-    return maxLatencyMs.get();
-  }
-
-  public double getAvgLatencyMs() {
-    long c = count.get();
-    return c == 0 ? 0 : (double) totalLatencyMs.get() / c;
-  }
-
-  /**
-   * Get bucket counts for histogram.
-   * Returns a snapshot of current bucket counts.
-   */
-  public long[] getBucketCounts() {
-    long[] counts = new long[bucketCounts.length];
-    for (int i = 0; i < bucketCounts.length; i++) {
-      counts[i] = bucketCounts[i].get();
-    }
-    return counts;
-  }
-
-  /**
-   * Reset all metrics (called after export).
-   */
-  public void reset() {
-    count.set(0);
-    totalLatencyMs.set(0);
-    minLatencyMs.set(Long.MAX_VALUE);
-    maxLatencyMs.set(0);
-
-    // Reset histogram buckets
-    for (AtomicLong bucket : bucketCounts) {
-      bucket.set(0);
-    }
-  }
-
-  @Override
-  public boolean equals(Object o) {
-    if (this == o) return true;
-    if (o == null || getClass() != o.getClass()) return false;
-    MetricData that = (MetricData) o;
-    return Objects.equals(statusCode, that.statusCode) && Objects.equals(method, that.method);
-  }
-
-  @Override
-  public int hashCode() {
-    return Objects.hash(statusCode, method);
-  }
-
-  @Override
-  public String toString() {
-    return String.format(
-        "MetricData{status=%s, method=%s, count=%d, avg=%.2fms, min=%dms, max=%dms}",
-        statusCode, method, getCount(), getAvgLatencyMs(), getMinLatencyMs(), getMaxLatencyMs());
-  }
-}
diff --git a/src/main/java/com/glean/proxy/metrics/OpenTelemetrySetup.java b/src/main/java/com/glean/proxy/metrics/OpenTelemetrySetup.java
new file mode 100644
index 0000000..d9ea80c
--- /dev/null
+++ b/src/main/java/com/glean/proxy/metrics/OpenTelemetrySetup.java
@@ -0,0 +1,84 @@
+package com.glean.proxy.metrics;
+
+import com.google.cloud.opentelemetry.metric.GoogleCloudMetricExporter;
+import com.google.cloud.opentelemetry.metric.MetricConfiguration;
+import io.opentelemetry.api.OpenTelemetry;
+import io.opentelemetry.api.metrics.Meter;
+import io.opentelemetry.sdk.OpenTelemetrySdk;
+import io.opentelemetry.sdk.metrics.SdkMeterProvider;
+import io.opentelemetry.sdk.metrics.export.MetricExporter;
+import io.opentelemetry.sdk.metrics.export.PeriodicMetricReader;
+import io.opentelemetry.sdk.resources.Resource;
+import io.opentelemetry.semconv.ResourceAttributes;
+import java.io.Closeable;
+import java.time.Duration;
+import java.util.logging.Logger;
+
+/**
+ * Initializes and configures OpenTelemetry with GCP Cloud Monitoring exporter.
+ */
+public class OpenTelemetrySetup implements Closeable {
+  private static final Logger logger = Logger.getLogger(OpenTelemetrySetup.class.getName());
+  private static final String INSTRUMENTATION_SCOPE_NAME = "glean-proxy";
+
+  private final OpenTelemetrySdk openTelemetry;
+  private final SdkMeterProvider meterProvider;
+
+  public OpenTelemetrySetup(String projectId) {
+    try {
+      logger.info("Initializing OpenTelemetry for project: " + projectId);
+
+      // Create resource with service name
+      Resource resource = Resource.getDefault()
+          .merge(Resource.builder()
+              .put(ResourceAttributes.SERVICE_NAME, "glean-proxy")
+              .put(ResourceAttributes.SERVICE_NAMESPACE, "glean")
+              .build());
+
+      // Create GCP Cloud Monitoring exporter
+      MetricConfiguration metricConfiguration = MetricConfiguration.builder()
+          .setProjectId(projectId)
+          .setPrefix("custom.googleapis.com")  // Use custom prefix instead of default workload.googleapis.com
+          .build();
+      MetricExporter metricExporter =
+          GoogleCloudMetricExporter.createWithConfiguration(metricConfiguration);
+
+      // Create periodic metric reader (exports every 60 seconds)
+      PeriodicMetricReader metricReader = PeriodicMetricReader.builder(metricExporter)
+          .setInterval(Duration.ofSeconds(60))
+          .build();
+
+      // Create meter provider
+      this.meterProvider = SdkMeterProvider.builder()
+          .setResource(resource)
+          .registerMetricReader(metricReader)
+          .build();
+
+      // Build OpenTelemetry SDK
+      this.openTelemetry = OpenTelemetrySdk.builder()
+          .setMeterProvider(meterProvider)
+          .build();
+
+
+    } catch (Exception e) {
+      logger.severe("Failed to initialize OpenTelemetry: " + e.getMessage());
+    }
+  }
+
+  public Meter getMeter() {
+    return openTelemetry.getMeter(INSTRUMENTATION_SCOPE_NAME);
+  }
+
+  public OpenTelemetry getOpenTelemetry() {
+    return openTelemetry;
+  }
+
+  @Override
+  public void close() {
+    logger.info("Shutting down OpenTelemetry...");
+    if (meterProvider != null) {
+      meterProvider.close();
+    }
+    logger.info("OpenTelemetry shut down");
+  }
+}
diff --git a/src/main/java/com/glean/proxy/metrics/ProxyMetrics.java b/src/main/java/com/glean/proxy/metrics/ProxyMetrics.java
index ad73bc5..37fcf91 100644
--- a/src/main/java/com/glean/proxy/metrics/ProxyMetrics.java
+++ b/src/main/java/com/glean/proxy/metrics/ProxyMetrics.java
@@ -1,36 +1,66 @@
 package com.glean.proxy.metrics;
 
-import com.glean.proxy.metrics.ProxyMetricsExporter.MetricKey;
-import java.util.concurrent.ConcurrentHashMap;
+import io.opentelemetry.api.common.AttributeKey;
+import io.opentelemetry.api.common.Attributes;
+import io.opentelemetry.api.metrics.DoubleHistogram;
+import io.opentelemetry.api.metrics.LongCounter;
+import io.opentelemetry.api.metrics.Meter;
 import java.util.logging.Logger;
 
 /**
- * Metrics collector for proxy requests.
- * Uses manual in-memory tracking instead of OpenCensus views.
+ * Metrics collector for proxy requests using OpenTelemetry.
+ * Records request counts and latency distributions with labels for status code and method.
  */
 public class ProxyMetrics {
   private static final Logger logger = Logger.getLogger(ProxyMetrics.class.getName());
   private static ProxyMetrics instance;
 
-  // Manual metric tracking (thread-safe)
-  private final ConcurrentHashMap<MetricKey, MetricData> metrics = new ConcurrentHashMap<>();
+  // Attribute keys for labels
+  private static final AttributeKey<String> STATUS_CODE = AttributeKey.stringKey("status_code");
+  private static final AttributeKey<String> METHOD = AttributeKey.stringKey("method");
 
-  public static synchronized ProxyMetrics getInstance() {
+  private final LongCounter requestCounter;
+  private final DoubleHistogram latencyHistogram;
+
+  private ProxyMetrics(Meter meter) {
+    this.requestCounter = meter
+        .counterBuilder("proxy/request_count")
+        .setDescription("Total number of proxy requests")
+        .setUnit("1")
+        .build();
+
+    this.latencyHistogram = meter
+        .histogramBuilder("proxy/request_latency")
+        .setDescription("Latency of proxy requests in milliseconds")
+        .setUnit("ms")
+        .build();
+
+    logger.info("ProxyMetrics initialized with OpenTelemetry");
+  }
+
+  public static synchronized void initialize(Meter meter) {
     if (instance == null) {
-      instance = new ProxyMetrics();
+      instance = new ProxyMetrics(meter);
     }
-    return instance;
   }
 
-  public ConcurrentHashMap<MetricKey, MetricData> getMetrics() {
-    return metrics;
+  public static synchronized ProxyMetrics getInstance() {
+    if (instance == null) {
+      throw new IllegalStateException("ProxyMetrics not initialized. Call initialize(Meter) first.");
+    }
+    return instance;
   }
 
   public void recordRequest(int statusCode, String method, long latencyMs) {
     try {
-      MetricKey key = new MetricKey(String.valueOf(statusCode), method);
-      MetricData data = metrics.computeIfAbsent(key, k -> new MetricData(k.getStatusCode(), k.getMethod()));
-      data.record(latencyMs);
+      Attributes attributes = Attributes.builder()
+          .put(STATUS_CODE, String.valueOf(statusCode))
+          .put(METHOD, method)
+          .build();
+
+      requestCounter.add(1, attributes);
+      latencyHistogram.record(latencyMs, attributes);
+
     } catch (Exception e) {
       logger.severe("Failed to record metrics: " + e.getMessage());
     }
diff --git a/src/main/java/com/glean/proxy/metrics/ProxyMetricsExporter.java b/src/main/java/com/glean/proxy/metrics/ProxyMetricsExporter.java
deleted file mode 100644
index da3f0aa..0000000
--- a/src/main/java/com/glean/proxy/metrics/ProxyMetricsExporter.java
+++ /dev/null
@@ -1,278 +0,0 @@
-package com.glean.proxy.metrics;
-
-import com.google.api.Distribution;
-import com.google.api.Distribution.BucketOptions;
-import com.google.api.Distribution.BucketOptions.Explicit;
-import com.google.api.Metric;
-import com.google.api.MonitoredResource;
-import com.google.cloud.monitoring.v3.MetricServiceClient;
-import com.google.monitoring.v3.CreateTimeSeriesRequest;
-import com.google.monitoring.v3.Point;
-import com.google.monitoring.v3.ProjectName;
-import com.google.monitoring.v3.TimeInterval;
-import com.google.monitoring.v3.TimeSeries;
-import com.google.monitoring.v3.TypedValue;
-import com.google.protobuf.Timestamp;
-import java.io.Closeable;
-import java.time.Clock;
-import java.time.Instant;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-import java.util.Map;
-import java.util.Timer;
-import java.util.TimerTask;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.logging.Logger;
-import java.util.stream.Collectors;
-
-/**
- * Periodically exports proxy metrics to GCP Cloud Monitoring.
- */
-public class ProxyMetricsExporter implements Closeable {
-  private static final Logger logger = Logger.getLogger(ProxyMetricsExporter.class.getName());
-  private static final long EXPORT_INTERVAL_MS = 60000; // 60 seconds
-
-  private final String projectId;
-  private final Clock clock;
-  private final Timer exportTimer;
-  private final ConcurrentHashMap<MetricKey, MetricData> metrics;
-  private MetricServiceClient metricServiceClient;
-
-  public ProxyMetricsExporter(
-      String projectId, Clock clock, ConcurrentHashMap<MetricKey, MetricData> metrics) {
-    this.projectId = projectId;
-    this.clock = clock;
-    this.metrics = metrics;
-    this.exportTimer = new Timer("ProxyMetricsExporter", true);
-
-    // Initialize GCP Monitoring client
-    try {
-      this.metricServiceClient = MetricServiceClient.create();
-      logger.info("MetricServiceClient created successfully");
-    } catch (Exception e) {
-      logger.severe("Failed to create MetricServiceClient: " + e.getMessage());
-      e.printStackTrace();
-    }
-
-    // Schedule periodic exports
-    exportTimer.scheduleAtFixedRate(
-        new TimerTask() {
-          @Override
-          public void run() {
-            exportMetrics();
-          }
-        },
-        EXPORT_INTERVAL_MS,
-        EXPORT_INTERVAL_MS);
-
-    logger.info(
-        String.format(
-            "ProxyMetricsExporter initialized for project %s, exporting every %d seconds",
-            projectId, EXPORT_INTERVAL_MS / 1000));
-  }
-
-  private void exportMetrics() {
-    if (metricServiceClient == null) {
-      logger.warning("MetricServiceClient not initialized, skipping export");
-      return;
-    }
-
-    try {
-      Instant now = clock.instant();
-      List<TimeSeries> timeSeriesList = new ArrayList<>();
-
-      // Snapshot and reset metrics
-      Map<MetricKey, MetricData> snapshot = new ConcurrentHashMap<>(metrics);
-      int totalMetrics = 0;
-
-      for (Map.Entry<MetricKey, MetricData> entry : snapshot.entrySet()) {
-        MetricKey key = entry.getKey();
-        MetricData data = entry.getValue();
-
-        long count = data.getCount();
-        if (count == 0) {
-          continue; // Skip empty metrics
-        }
-
-        totalMetrics++;
-
-        // Create time series for request count
-        timeSeriesList.add(createCountTimeSeries(key, data, now));
-
-        // Create time series for request latency (distribution)
-        timeSeriesList.add(createLatencyTimeSeries(key, data, now));
-
-        // Reset the metric after export
-        MetricData originalData = metrics.get(key);
-        if (originalData != null) {
-          originalData.reset();
-        }
-      }
-
-      if (timeSeriesList.isEmpty()) {
-        logger.fine("No metrics to export");
-        return;
-      }
-
-      // Send to GCP Cloud Monitoring
-      ProjectName projectName = ProjectName.of(projectId);
-      CreateTimeSeriesRequest request =
-          CreateTimeSeriesRequest.newBuilder()
-              .setName(projectName.toString())
-              .addAllTimeSeries(timeSeriesList)
-              .build();
-
-      metricServiceClient.createTimeSeries(request);
-
-      logger.info(
-          String.format(
-              "Successfully exported %d metrics (%d time series) to Cloud Monitoring",
-              totalMetrics, timeSeriesList.size()));
-
-    } catch (Exception e) {
-      logger.severe("Failed to export metrics: " + e.getMessage());
-      e.printStackTrace();
-    }
-  }
-
-  private TimeSeries createCountTimeSeries(MetricKey key, MetricData data, Instant now) {
-    Metric metric =
-        Metric.newBuilder()
-            .setType("custom.googleapis.com/proxy/request_count")
-            .putLabels("status_code", key.getStatusCode())
-            .putLabels("method", key.getMethod())
-            .build();
-
-    MonitoredResource resource =
-        MonitoredResource.newBuilder().setType("global").putLabels("project_id", projectId).build();
-
-    Timestamp timestamp = Timestamp.newBuilder().setSeconds(now.getEpochSecond()).build();
-    TimeInterval interval =
-        TimeInterval.newBuilder().setEndTime(timestamp).setStartTime(timestamp).build();
-
-    Point point =
-        Point.newBuilder()
-            .setInterval(interval)
-            .setValue(TypedValue.newBuilder().setInt64Value(data.getCount()).build())
-            .build();
-
-    return TimeSeries.newBuilder()
-        .setMetric(metric)
-        .setResource(resource)
-        .setValueType(com.google.api.MetricDescriptor.ValueType.INT64)
-        .setMetricKind(com.google.api.MetricDescriptor.MetricKind.GAUGE)
-        .addPoints(point)
-        .build();
-  }
-
-  private TimeSeries createLatencyTimeSeries(MetricKey key, MetricData data, Instant now) {
-    Metric metric =
-        Metric.newBuilder()
-            .setType("custom.googleapis.com/proxy/request_latency_distribution")
-            .putLabels("status_code", key.getStatusCode())
-            .putLabels("method", key.getMethod())
-            .build();
-
-    MonitoredResource resource =
-        MonitoredResource.newBuilder().setType("global").putLabels("project_id", projectId).build();
-
-    Timestamp timestamp = Timestamp.newBuilder().setSeconds(now.getEpochSecond()).build();
-    TimeInterval interval =
-        TimeInterval.newBuilder().setEndTime(timestamp).setStartTime(timestamp).build();
-
-    // Create distribution with explicit bucket boundaries
-    // Convert double[] to List<Double> for BucketOptions
-    List<Double> bounds = Arrays.stream(MetricData.BUCKET_BOUNDS)
-        .boxed()
-        .collect(Collectors.toList());
-
-    BucketOptions bucketOptions =
-        BucketOptions.newBuilder()
-            .setExplicitBuckets(Explicit.newBuilder().addAllBounds(bounds).build())
-            .build();
-
-    // Get bucket counts from data
-    long[] bucketCounts = data.getBucketCounts();
-
-    Distribution.Builder distributionBuilder =
-        Distribution.newBuilder()
-            .setCount(data.getCount())
-            .setMean(data.getAvgLatencyMs())
-            .setBucketOptions(bucketOptions);
-
-    // Add bucket counts (convert long[] to List<Long>)
-    for (long count : bucketCounts) {
-      distributionBuilder.addBucketCounts(count);
-    }
-
-    Distribution distribution = distributionBuilder.build();
-
-    Point point =
-        Point.newBuilder()
-            .setInterval(interval)
-            .setValue(TypedValue.newBuilder().setDistributionValue(distribution).build())
-            .build();
-
-    return TimeSeries.newBuilder()
-        .setMetric(metric)
-        .setResource(resource)
-        .setValueType(com.google.api.MetricDescriptor.ValueType.DISTRIBUTION)
-        .setMetricKind(com.google.api.MetricDescriptor.MetricKind.GAUGE)
-        .addPoints(point)
-        .build();
-  }
-
-  @Override
-  public void close() {
-    logger.info("Shutting down ProxyMetricsExporter...");
-    exportTimer.cancel();
-
-    // Do final export
-    exportMetrics();
-
-    if (metricServiceClient != null) {
-      metricServiceClient.close();
-    }
-    logger.info("ProxyMetricsExporter shut down");
-  }
-
-  /**
-   * Key for grouping metrics by status code and method.
-   */
-  public static class MetricKey {
-    private final String statusCode;
-    private final String method;
-
-    public MetricKey(String statusCode, String method) {
-      this.statusCode = statusCode;
-      this.method = method;
-    }
-
-    public String getStatusCode() {
-      return statusCode;
-    }
-
-    public String getMethod() {
-      return method;
-    }
-
-    @Override
-    public boolean equals(Object o) {
-      if (this == o) return true;
-      if (o == null || getClass() != o.getClass()) return false;
-      MetricKey that = (MetricKey) o;
-      return statusCode.equals(that.statusCode) && method.equals(that.method);
-    }
-
-    @Override
-    public int hashCode() {
-      return 31 * statusCode.hashCode() + method.hashCode();
-    }
-
-    @Override
-    public String toString() {
-      return String.format("MetricKey{status=%s, method=%s}", statusCode, method);
-    }
-  }
-}