/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.hadoop.hbase.replication.regionserver;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.hbase.CompatibilitySingletonFactory;
import org.apache.hadoop.hbase.replication.regionserver.MetricsReplicationSource;
/**
* This class is for maintaining the various replication statistics for a sink and publishing them
* through the metrics interfaces.
*/
@InterfaceAudience.Private
public class MetricsSink {
public static final String SINK_AGE_OF_LAST_APPLIED_OP = "sink.ageOfLastAppliedOp";
public static final String SINK_APPLIED_BATCHES = "sink.appliedBatches";
public static final String SINK_APPLIED_OPS = "sink.appliedOps";
private MetricsReplicationSource rms;
private long lastTimestampForAge = System.currentTimeMillis();
public MetricsSink() {
rms = CompatibilitySingletonFactory.getInstance(MetricsReplicationSource.class);
}
/**
* Set the age of the last applied operation
*
* @param timestamp The timestamp of the last operation applied.
* @return the age that was set
*/
public long setAgeOfLastAppliedOp(long timestamp) {
lastTimestampForAge = timestamp;
long age = System.currentTimeMillis() - lastTimestampForAge;
rms.setGauge(SINK_AGE_OF_LAST_APPLIED_OP, age);
return age;
}
/**
* Refreshing the age makes sure the value returned is the actual one and
* not the one set a replication time
* @return refreshed age
*/
public long refreshAgeOfLastAppliedOp() {
return setAgeOfLastAppliedOp(lastTimestampForAge);
}
/**
* Convience method to change metrics when a batch of operations are applied.
*
* @param batchSize
*/
public void applyBatch(long batchSize) {
rms.incCounters(SINK_APPLIED_BATCHES, 1);
rms.incCounters(SINK_APPLIED_OPS, batchSize);
}
}