| /** |
| * 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.hdfs.server.federation.metrics; |
| |
| import static org.apache.hadoop.metrics2.impl.MsInfo.ProcessName; |
| import static org.apache.hadoop.metrics2.impl.MsInfo.SessionId; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.metrics2.MetricsSystem; |
| import org.apache.hadoop.metrics2.annotation.Metric; |
| import org.apache.hadoop.metrics2.annotation.Metrics; |
| import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem; |
| import org.apache.hadoop.metrics2.lib.MetricsRegistry; |
| import org.apache.hadoop.metrics2.lib.MutableGaugeInt; |
| import org.apache.hadoop.metrics2.lib.MutableRate; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| |
| /** |
| * Implementations of the JMX interface for the State Store metrics. |
| */ |
| @Metrics(name = "StateStoreActivity", about = "Router metrics", |
| context = "dfs") |
| public final class StateStoreMetrics implements StateStoreMBean { |
| |
| private final MetricsRegistry registry = new MetricsRegistry("router"); |
| |
| @Metric("GET transactions") |
| private MutableRate reads; |
| @Metric("PUT transactions") |
| private MutableRate writes; |
| @Metric("REMOVE transactions") |
| private MutableRate removes; |
| @Metric("Failed transactions") |
| private MutableRate failures; |
| |
| private Map<String, MutableGaugeInt> cacheSizes; |
| |
| private StateStoreMetrics(Configuration conf) { |
| registry.tag(SessionId, "RouterSession"); |
| registry.tag(ProcessName, "Router"); |
| cacheSizes = new HashMap<>(); |
| } |
| |
| public static StateStoreMetrics create(Configuration conf) { |
| MetricsSystem ms = DefaultMetricsSystem.instance(); |
| return ms.register(new StateStoreMetrics(conf)); |
| } |
| |
| public void shutdown() { |
| DefaultMetricsSystem.shutdown(); |
| reset(); |
| } |
| |
| public void addRead(long latency) { |
| reads.add(latency); |
| } |
| |
| public long getReadOps() { |
| return reads.lastStat().numSamples(); |
| } |
| |
| public double getReadAvg() { |
| return reads.lastStat().mean(); |
| } |
| |
| public void addWrite(long latency) { |
| writes.add(latency); |
| } |
| |
| public long getWriteOps() { |
| return writes.lastStat().numSamples(); |
| } |
| |
| public double getWriteAvg() { |
| return writes.lastStat().mean(); |
| } |
| |
| public void addFailure(long latency) { |
| failures.add(latency); |
| } |
| |
| public long getFailureOps() { |
| return failures.lastStat().numSamples(); |
| } |
| |
| public double getFailureAvg() { |
| return failures.lastStat().mean(); |
| } |
| |
| public void addRemove(long latency) { |
| removes.add(latency); |
| } |
| |
| public long getRemoveOps() { |
| return removes.lastStat().numSamples(); |
| } |
| |
| public double getRemoveAvg() { |
| return removes.lastStat().mean(); |
| } |
| |
| /** |
| * Set the size of the cache for a State Store interface. |
| * |
| * @param name Name of the record to cache. |
| * @param size Number of records. |
| */ |
| public void setCacheSize(String name, int size) { |
| String counterName = "Cache" + name + "Size"; |
| MutableGaugeInt counter = cacheSizes.get(counterName); |
| if (counter == null) { |
| counter = registry.newGauge(counterName, name, size); |
| cacheSizes.put(counterName, counter); |
| } |
| counter.set(size); |
| } |
| |
| @VisibleForTesting |
| public void reset() { |
| reads.resetMinMax(); |
| writes.resetMinMax(); |
| removes.resetMinMax(); |
| failures.resetMinMax(); |
| |
| reads.lastStat().reset(); |
| writes.lastStat().reset(); |
| removes.lastStat().reset(); |
| failures.lastStat().reset(); |
| } |
| } |