/**
* 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.regionserver.wal;
import org.apache.hadoop.hbase.metrics.BaseSourceImpl;
import org.apache.hadoop.metrics2.MetricHistogram;
import org.apache.hadoop.metrics2.lib.MutableCounterLong;
/**
* Class that transitions metrics from HLog's MetricsWAL into the metrics subsystem.
*
* Implements BaseSource through BaseSourceImpl, following the pattern.
*/
public class MetricsWALSourceImpl extends BaseSourceImpl implements MetricsWALSource {
private final MetricHistogram appendSizeHisto;
private final MetricHistogram appendTimeHisto;
private final MetricHistogram syncTimeHisto;
private final MutableCounterLong appendCount;
private final MutableCounterLong slowAppendCount;
public MetricsWALSourceImpl() {
this(METRICS_NAME, METRICS_DESCRIPTION, METRICS_CONTEXT, METRICS_JMX_CONTEXT);
}
public MetricsWALSourceImpl(String metricsName,
String metricsDescription,
String metricsContext,
String metricsJmxContext) {
super(metricsName, metricsDescription, metricsContext, metricsJmxContext);
//Create and store the metrics that will be used.
appendTimeHisto = this.getMetricsRegistry().newHistogram(APPEND_TIME, APPEND_TIME_DESC);
appendSizeHisto = this.getMetricsRegistry().newHistogram(APPEND_SIZE, APPEND_SIZE_DESC);
appendCount = this.getMetricsRegistry().newCounter(APPEND_COUNT, APPEND_COUNT_DESC, 0l);
slowAppendCount = this.getMetricsRegistry().newCounter(SLOW_APPEND_COUNT, SLOW_APPEND_COUNT_DESC, 0l);
syncTimeHisto = this.getMetricsRegistry().newHistogram(SYNC_TIME, SYNC_TIME_DESC);
}
@Override
public void incrementAppendSize(long size) {
appendSizeHisto.add(size);
}
@Override
public void incrementAppendTime(long time) {
appendTimeHisto.add(time);
}
@Override
public void incrementAppendCount() {
appendCount.incr();
}
@Override
public void incrementSlowAppendCount() {
slowAppendCount.incr();
}
@Override
public void incrementSyncTime(long time) {
syncTimeHisto.add(time);
}
}