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Interfaces to be implemented in order to smooth
over hadoop version differences
/*
* 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 java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.metrics.BaseSourceImpl;
import org.apache.hadoop.metrics2.MetricHistogram;
import org.apache.hadoop.metrics2.lib.MutableFastCounter;
import org.apache.yetus.audience.InterfaceAudience;
/**
* Class that transitions metrics from MetricsWAL into the metrics subsystem. Implements BaseSource
* through BaseSourceImpl, following the pattern.
* @see org.apache.hadoop.hbase.regionserver.wal.MetricsWALSource
*/
@InterfaceAudience.Private
public class MetricsWALSourceImpl extends BaseSourceImpl implements MetricsWALSource {
private final MetricHistogram appendSizeHisto;
private final MetricHistogram appendTimeHisto;
private final MetricHistogram syncTimeHisto;
private final MutableFastCounter appendCount;
private final MutableFastCounter slowAppendCount;
private final MutableFastCounter logRollRequested;
private final MutableFastCounter errorRollRequested;
private final MutableFastCounter lowReplicationRollRequested;
private final MutableFastCounter slowSyncRollRequested;
private final MutableFastCounter sizeRollRequested;
private final MutableFastCounter writtenBytes;
private final MutableFastCounter successfulLogRolls;
// Per table metrics.
private final ConcurrentMap perTableAppendCount;
private final ConcurrentMap perTableAppendSize;
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().newTimeHistogram(APPEND_TIME, APPEND_TIME_DESC);
appendSizeHisto = this.getMetricsRegistry().newSizeHistogram(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().newTimeHistogram(SYNC_TIME, SYNC_TIME_DESC);
logRollRequested =
this.getMetricsRegistry().newCounter(ROLL_REQUESTED, ROLL_REQUESTED_DESC, 0L);
errorRollRequested =
this.getMetricsRegistry().newCounter(ERROR_ROLL_REQUESTED, ERROR_ROLL_REQUESTED_DESC, 0L);
lowReplicationRollRequested = this.getMetricsRegistry().newCounter(LOW_REPLICA_ROLL_REQUESTED,
LOW_REPLICA_ROLL_REQUESTED_DESC, 0L);
slowSyncRollRequested = this.getMetricsRegistry().newCounter(SLOW_SYNC_ROLL_REQUESTED,
SLOW_SYNC_ROLL_REQUESTED_DESC, 0L);
sizeRollRequested =
this.getMetricsRegistry().newCounter(SIZE_ROLL_REQUESTED, SIZE_ROLL_REQUESTED_DESC, 0L);
writtenBytes = this.getMetricsRegistry().newCounter(WRITTEN_BYTES, WRITTEN_BYTES_DESC, 0L);
successfulLogRolls =
this.getMetricsRegistry().newCounter(SUCCESSFUL_LOG_ROLLS, SUCCESSFUL_LOG_ROLLS_DESC, 0L);
perTableAppendCount = new ConcurrentHashMap<>();
perTableAppendSize = new ConcurrentHashMap<>();
}
@Override
public void incrementAppendSize(TableName tableName, long size) {
appendSizeHisto.add(size);
MutableFastCounter tableAppendSizeCounter = perTableAppendSize.get(tableName);
if (tableAppendSizeCounter == null) {
// Ideally putIfAbsent is atomic and we don't need a branch check but we still do it to avoid
// expensive string construction for every append.
String metricsKey = String.format("%s.%s", tableName, APPEND_SIZE);
perTableAppendSize.putIfAbsent(tableName,
getMetricsRegistry().newCounter(metricsKey, APPEND_SIZE_DESC, 0L));
tableAppendSizeCounter = perTableAppendSize.get(tableName);
}
tableAppendSizeCounter.incr(size);
}
@Override
public void incrementAppendTime(long time) {
appendTimeHisto.add(time);
}
@Override
public void incrementAppendCount(TableName tableName) {
appendCount.incr();
MutableFastCounter tableAppendCounter = perTableAppendCount.get(tableName);
if (tableAppendCounter == null) {
String metricsKey = String.format("%s.%s", tableName, APPEND_COUNT);
perTableAppendCount.putIfAbsent(tableName,
getMetricsRegistry().newCounter(metricsKey, APPEND_COUNT_DESC, 0L));
tableAppendCounter = perTableAppendCount.get(tableName);
}
tableAppendCounter.incr();
}
@Override
public void incrementSlowAppendCount() {
slowAppendCount.incr();
}
@Override
public void incrementSyncTime(long time) {
syncTimeHisto.add(time);
}
@Override
public void incrementLogRollRequested() {
logRollRequested.incr();
}
@Override
public void incrementErrorLogRoll() {
errorRollRequested.incr();
}
@Override
public void incrementLowReplicationLogRoll() {
lowReplicationRollRequested.incr();
}
@Override
public void incrementSlowSyncLogRoll() {
slowSyncRollRequested.incr();
}
@Override
public void incrementSizeLogRoll() {
sizeRollRequested.incr();
}
@Override
public long getSlowAppendCount() {
return slowAppendCount.value();
}
@Override
public void incrementWrittenBytes(long val) {
writtenBytes.incr(val);
}
@Override
public void incrementSuccessfulLogRolls() {
successfulLogRolls.incr();
}
@Override
public long getSuccessfulLogRolls() {
return successfulLogRolls.value();
}
}