hadoop RouterMetrics 源码
haddop RouterMetrics 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterMetrics.java
/**
* 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.router;
import static org.apache.hadoop.metrics2.impl.MsInfo.ProcessName;
import static org.apache.hadoop.metrics2.impl.MsInfo.SessionId;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.DFSConfigKeys;
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.source.JvmMetrics;
/**
* This class is for maintaining the various Router activity statistics
* and publishing them through the metrics interfaces.
*/
@Metrics(name="RouterActivity", about="Router metrics", context="dfs")
public class RouterMetrics {
private final MetricsRegistry registry = new MetricsRegistry("router");
@Metric("Duration in SafeMode at startup in msec")
private MutableGaugeInt safeModeTime;
private JvmMetrics jvmMetrics = null;
RouterMetrics(
String processName, String sessionId, final JvmMetrics jvmMetrics) {
this.jvmMetrics = jvmMetrics;
registry.tag(ProcessName, processName).tag(SessionId, sessionId);
}
public static RouterMetrics create(Configuration conf) {
String sessionId = conf.get(DFSConfigKeys.DFS_METRICS_SESSION_ID_KEY);
String processName = "Router";
MetricsSystem ms = DefaultMetricsSystem.instance();
JvmMetrics jm = JvmMetrics.create(processName, sessionId, ms);
return ms.register(new RouterMetrics(processName, sessionId, jm));
}
public JvmMetrics getJvmMetrics() {
return jvmMetrics;
}
public void shutdown() {
DefaultMetricsSystem.shutdown();
}
public void setSafeModeTime(long elapsed) {
safeModeTime.set((int) elapsed);
}
}
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