1 files changed, 101 insertions, 0 deletions
diff --git a/java/com/google/gerrit/server/git/UploadPackMetricsHook.java b/java/com/google/gerrit/server/git/UploadPackMetricsHook.java
new file mode 100644
index 0000000000..aa02fba99a
--- /dev/null
+++ b/java/com/google/gerrit/server/git/UploadPackMetricsHook.java
@@ -0,0 +1,101 @@
+// Copyright (C) 2015 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.server.git;
+
+import static java.util.concurrent.TimeUnit.MILLISECONDS;
+
+import com.google.gerrit.metrics.Counter1;
+import com.google.gerrit.metrics.Description;
+import com.google.gerrit.metrics.Description.Units;
+import com.google.gerrit.metrics.Field;
+import com.google.gerrit.metrics.Histogram1;
+import com.google.gerrit.metrics.MetricMaker;
+import com.google.gerrit.metrics.Timer1;
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
+import org.eclipse.jgit.storage.pack.PackStatistics;
+import org.eclipse.jgit.transport.PostUploadHook;
+
+@Singleton
+public class UploadPackMetricsHook implements PostUploadHook {
+  enum Operation {
+    CLONE,
+    FETCH;
+  }
+
+  private final Counter1<Operation> requestCount;
+  private final Timer1<Operation> counting;
+  private final Timer1<Operation> compressing;
+  private final Timer1<Operation> writing;
+  private final Histogram1<Operation> packBytes;
+
+  @Inject
+  UploadPackMetricsHook(MetricMaker metricMaker) {
+    Field<Operation> operation = Field.ofEnum(Operation.class, "operation");
+    requestCount =
+        metricMaker.newCounter(
+            "git/upload-pack/request_count",
+            new Description("Total number of git-upload-pack requests")
+                .setRate()
+                .setUnit("requests"),
+            operation);
+
+    counting =
+        metricMaker.newTimer(
+            "git/upload-pack/phase_counting",
+            new Description("Time spent in the 'Counting...' phase")
+                .setCumulative()
+                .setUnit(Units.MILLISECONDS),
+            operation);
+
+    compressing =
+        metricMaker.newTimer(
+            "git/upload-pack/phase_compressing",
+            new Description("Time spent in the 'Compressing...' phase")
+                .setCumulative()
+                .setUnit(Units.MILLISECONDS),
+            operation);
+
+    writing =
+        metricMaker.newTimer(
+            "git/upload-pack/phase_writing",
+            new Description("Time spent transferring bytes to client")
+                .setCumulative()
+                .setUnit(Units.MILLISECONDS),
+            operation);
+
+    packBytes =
+        metricMaker.newHistogram(
+            "git/upload-pack/pack_bytes",
+            new Description("Distribution of sizes of packs sent to clients")
+                .setCumulative()
+                .setUnit(Units.BYTES),
+            operation);
+  }
+
+  @Override
+  public void onPostUpload(PackStatistics stats) {
+    Operation op = Operation.FETCH;
+    if (stats.getUninterestingObjects() == null || stats.getUninterestingObjects().isEmpty()) {
+      op = Operation.CLONE;
+    }
+
+    requestCount.increment(op);
+    counting.record(op, stats.getTimeCounting(), MILLISECONDS);
+    compressing.record(op, stats.getTimeCompressing(), MILLISECONDS);
+    writing.record(op, stats.getTimeWriting(), MILLISECONDS);
+    packBytes.record(op, stats.getTotalBytes());
+  }
+}