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// 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.googlesource.gerrit.plugins.replication;
import com.google.gerrit.metrics.Description;
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;
@Singleton
public class ReplicationMetrics {
private final Timer1<String> executionTime;
private final Histogram1<String> executionDelay;
private final Histogram1<String> executionRetries;
@Inject
ReplicationMetrics(MetricMaker metricMaker) {
Field<String> DEST_FIELD = Field.ofString("destination");
executionTime = metricMaker.newTimer(
"replication_latency",
new Description("Time spent pushing to remote destination.")
.setCumulative()
.setUnit(Description.Units.MILLISECONDS),
DEST_FIELD);
executionDelay = metricMaker.newHistogram(
"replication_delay",
new Description("Time spent waiting before pushing to remote destination")
.setCumulative()
.setUnit(Description.Units.MILLISECONDS),
DEST_FIELD);
executionRetries = metricMaker.newHistogram(
"replication_retries",
new Description("Number of retries when pushing to remote destination")
.setCumulative()
.setUnit("retries"),
DEST_FIELD);
}
/**
* Start the replication latency timer for a destination.
* @param name the destination name.
* @return the timer context.
*/
Timer1.Context start(String name) {
return executionTime.start(name);
}
/**
* Record the replication delay and retry metrics for a destination.
* @param name the destination name.
* @param delay replication delay in milliseconds.
* @param retries number of retries.
*/
void record(String name, long delay, long retries) {
executionDelay.record(name, delay);
executionRetries.record(name, retries);
}
}
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