/**
* 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;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.metrics.Interns;
import org.apache.hadoop.metrics2.MetricsRecordBuilder;
import org.apache.hadoop.metrics2.lib.DynamicMetricsRegistry;
import org.apache.hadoop.metrics2.lib.MutableFastCounter;
@InterfaceAudience.Private
public class MetricsRegionSourceImpl implements MetricsRegionSource {
private static final Log LOG = LogFactory.getLog(MetricsRegionSourceImpl.class);
private AtomicBoolean closed = new AtomicBoolean(false);
// Non-final so that we can null out the wrapper
// This is just paranoia. We really really don't want to
// leak a whole region by way of keeping the
// regionWrapper around too long.
private MetricsRegionWrapper regionWrapper;
private final MetricsRegionAggregateSourceImpl agg;
private final DynamicMetricsRegistry registry;
private final String regionNamePrefix;
private final String regionPutKey;
private final String regionDeleteKey;
private final String regionGetKey;
private final String regionIncrementKey;
private final String regionAppendKey;
private final String regionScanKey;
/*
* Implementation note: Do not put histograms per region. With hundreds of regions in a server
* histograms allocate too many counters. See HBASE-17016.
*/
private final MutableFastCounter regionPut;
private final MutableFastCounter regionDelete;
private final MutableFastCounter regionIncrement;
private final MutableFastCounter regionAppend;
private final MutableFastCounter regionGet;
private final MutableFastCounter regionScan;
private final int hashCode;
public MetricsRegionSourceImpl(MetricsRegionWrapper regionWrapper,
MetricsRegionAggregateSourceImpl aggregate) {
this.regionWrapper = regionWrapper;
agg = aggregate;
agg.register(this);
LOG.debug("Creating new MetricsRegionSourceImpl for table " +
regionWrapper.getTableName() + " " + regionWrapper.getRegionName());
registry = agg.getMetricsRegistry();
regionNamePrefix = "Namespace_" + regionWrapper.getNamespace() +
"_table_" + regionWrapper.getTableName() +
"_region_" + regionWrapper.getRegionName() +
"_metric_";
String suffix = "Count";
regionPutKey = regionNamePrefix + MetricsRegionServerSource.MUTATE_KEY + suffix;
regionPut = registry.getCounter(regionPutKey, 0L);
regionDeleteKey = regionNamePrefix + MetricsRegionServerSource.DELETE_KEY + suffix;
regionDelete = registry.getCounter(regionDeleteKey, 0L);
regionIncrementKey = regionNamePrefix + MetricsRegionServerSource.INCREMENT_KEY + suffix;
regionIncrement = registry.getCounter(regionIncrementKey, 0L);
regionAppendKey = regionNamePrefix + MetricsRegionServerSource.APPEND_KEY + suffix;
regionAppend = registry.getCounter(regionAppendKey, 0L);
regionGetKey = regionNamePrefix + MetricsRegionServerSource.GET_KEY + suffix;
regionGet = registry.getCounter(regionGetKey, 0L);
regionScanKey = regionNamePrefix + MetricsRegionServerSource.SCAN_KEY + suffix;
regionScan = registry.getCounter(regionScanKey, 0L);
hashCode = regionWrapper.getRegionHashCode();
}
@Override
public void close() {
boolean wasClosed = closed.getAndSet(true);
// Has someone else already closed this for us?
if (wasClosed) {
return;
}
// Before removing the metrics remove this region from the aggregate region bean.
// This should mean that it's unlikely that snapshot and close happen at the same time.
agg.deregister(this);
// While it's un-likely that snapshot and close happen at the same time it's still possible.
// So grab the lock to ensure that all calls to snapshot are done before we remove the metrics
synchronized (this) {
if (LOG.isTraceEnabled()) {
LOG.trace("Removing region Metrics: " + regionWrapper.getRegionName());
}
registry.removeMetric(regionPutKey);
registry.removeMetric(regionDeleteKey);
registry.removeMetric(regionIncrementKey);
registry.removeMetric(regionAppendKey);
registry.removeMetric(regionGetKey);
registry.removeMetric(regionScanKey);
regionWrapper = null;
}
}
@Override
public void updatePut() {
regionPut.incr();
}
@Override
public void updateDelete() {
regionDelete.incr();
}
@Override
public void updateGet(long mills) {
regionGet.incr();
}
@Override
public void updateScanTime(long mills) {
regionScan.incr();
}
@Override
public void updateIncrement() {
regionIncrement.incr();
}
@Override
public void updateAppend() {
regionAppend.incr();
}
@Override
public MetricsRegionAggregateSource getAggregateSource() {
return agg;
}
@Override
public int compareTo(MetricsRegionSource source) {
if (!(source instanceof MetricsRegionSourceImpl)) {
return -1;
}
MetricsRegionSourceImpl impl = (MetricsRegionSourceImpl) source;
if (impl == null) {
return -1;
}
return Long.compare(hashCode, impl.hashCode);
}
void snapshot(MetricsRecordBuilder mrb, boolean ignored) {
// If there is a close that started be double extra sure
// that we're not getting any locks and not putting data
// into the metrics that should be removed. So early out
// before even getting the lock.
if (closed.get()) {
return;
}
// Grab the read
// This ensures that removes of the metrics
// can't happen while we are putting them back in.
synchronized (this) {
// It's possible that a close happened between checking
// the closed variable and getting the lock.
if (closed.get()) {
return;
}
mrb.addGauge(
Interns.info(
regionNamePrefix + MetricsRegionServerSource.STORE_COUNT,
MetricsRegionServerSource.STORE_COUNT_DESC),
this.regionWrapper.getNumStores());
mrb.addGauge(Interns.info(
regionNamePrefix + MetricsRegionServerSource.STOREFILE_COUNT,
MetricsRegionServerSource.STOREFILE_COUNT_DESC),
this.regionWrapper.getNumStoreFiles());
mrb.addGauge(Interns.info(
regionNamePrefix + MetricsRegionServerSource.MEMSTORE_SIZE,
MetricsRegionServerSource.MEMSTORE_SIZE_DESC),
this.regionWrapper.getMemstoreSize());
mrb.addGauge(Interns.info(
regionNamePrefix + MetricsRegionServerSource.MAX_STORE_FILE_AGE,
MetricsRegionServerSource.MAX_STORE_FILE_AGE_DESC),
this.regionWrapper.getMaxStoreFileAge());
mrb.addGauge(Interns.info(
regionNamePrefix + MetricsRegionServerSource.MIN_STORE_FILE_AGE,
MetricsRegionServerSource.MIN_STORE_FILE_AGE_DESC),
this.regionWrapper.getMinStoreFileAge());
mrb.addGauge(Interns.info(
regionNamePrefix + MetricsRegionServerSource.AVG_STORE_FILE_AGE,
MetricsRegionServerSource.AVG_STORE_FILE_AGE_DESC),
this.regionWrapper.getAvgStoreFileAge());
mrb.addGauge(Interns.info(
regionNamePrefix + MetricsRegionServerSource.NUM_REFERENCE_FILES,
MetricsRegionServerSource.NUM_REFERENCE_FILES_DESC),
this.regionWrapper.getNumReferenceFiles());
mrb.addGauge(Interns.info(
regionNamePrefix + MetricsRegionServerSource.STOREFILE_SIZE,
MetricsRegionServerSource.STOREFILE_SIZE_DESC),
this.regionWrapper.getStoreFileSize());
mrb.addCounter(Interns.info(
regionNamePrefix + MetricsRegionSource.COMPACTIONS_COMPLETED_COUNT,
MetricsRegionSource.COMPACTIONS_COMPLETED_DESC),
this.regionWrapper.getNumCompactionsCompleted());
mrb.addCounter(Interns.info(
regionNamePrefix + MetricsRegionSource.COMPACTIONS_FAILED_COUNT,
MetricsRegionSource.COMPACTIONS_FAILED_DESC),
this.regionWrapper.getNumCompactionsFailed());
mrb.addCounter(Interns.info(
regionNamePrefix + MetricsRegionSource.LAST_MAJOR_COMPACTION_AGE,
MetricsRegionSource.LAST_MAJOR_COMPACTION_DESC),
this.regionWrapper.getLastMajorCompactionAge());
mrb.addCounter(Interns.info(
regionNamePrefix + MetricsRegionSource.NUM_BYTES_COMPACTED_COUNT,
MetricsRegionSource.NUM_BYTES_COMPACTED_DESC),
this.regionWrapper.getNumBytesCompacted());
mrb.addCounter(Interns.info(
regionNamePrefix + MetricsRegionSource.NUM_FILES_COMPACTED_COUNT,
MetricsRegionSource.NUM_FILES_COMPACTED_DESC),
this.regionWrapper.getNumFilesCompacted());
mrb.addCounter(Interns.info(
regionNamePrefix + MetricsRegionServerSource.READ_REQUEST_COUNT,
MetricsRegionServerSource.READ_REQUEST_COUNT_DESC),
this.regionWrapper.getReadRequestCount());
mrb.addCounter(Interns.info(
regionNamePrefix + MetricsRegionServerSource.FILTERED_READ_REQUEST_COUNT,
MetricsRegionServerSource.FILTERED_READ_REQUEST_COUNT_DESC),
this.regionWrapper.getFilteredReadRequestCount());
mrb.addCounter(Interns.info(
regionNamePrefix + MetricsRegionServerSource.WRITE_REQUEST_COUNT,
MetricsRegionServerSource.WRITE_REQUEST_COUNT_DESC),
this.regionWrapper.getWriteRequestCount());
mrb.addCounter(Interns.info(regionNamePrefix + MetricsRegionSource.REPLICA_ID,
MetricsRegionSource.REPLICA_ID_DESC),
this.regionWrapper.getReplicaId());
}
}
@Override
public int hashCode() {
return hashCode;
}
@Override
public boolean equals(Object obj) {
return obj == this ||
(obj instanceof MetricsRegionSourceImpl && compareTo((MetricsRegionSourceImpl) obj) == 0);
}
}