1 files changed, 39 insertions, 0 deletions
diff --git a/java/com/google/gerrit/metrics/proc/JGitMetricModule.java b/java/com/google/gerrit/metrics/proc/JGitMetricModule.java
new file mode 100644
index 0000000000..438f70e9c3
--- /dev/null
+++ b/java/com/google/gerrit/metrics/proc/JGitMetricModule.java
@@ -0,0 +1,39 @@
+// 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.metrics.proc;
+
+import com.google.gerrit.metrics.Description;
+import com.google.gerrit.metrics.Description.Units;
+import com.google.gerrit.metrics.MetricMaker;
+import org.eclipse.jgit.storage.file.WindowCacheStats;
+
+public class JGitMetricModule extends MetricModule {
+  @Override
+  protected void configure(MetricMaker metrics) {
+    metrics.newCallbackMetric(
+        "jgit/block_cache/cache_used",
+        Long.class,
+        new Description("Bytes of memory retained in JGit block cache.")
+            .setGauge()
+            .setUnit(Units.BYTES),
+        WindowCacheStats::getOpenBytes);
+
+    metrics.newCallbackMetric(
+        "jgit/block_cache/open_files",
+        Integer.class,
+        new Description("File handles held open by JGit block cache.").setGauge().setUnit("fds"),
+        WindowCacheStats::getOpenFiles);
+  }
+}