org.apache.hudi.org.apache.hadoop.hbase.regionserver.DumpRegionServerMetrics Maven / Gradle / Ivy
/*
* 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.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.management.ManagementFactory;
import javax.management.MBeanServer;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import org.apache.hadoop.hbase.util.JSONBean;
import org.apache.yetus.audience.InterfaceAudience;
/**
* Utility for doing JSON and MBeans.
*/
@InterfaceAudience.Private
public final class DumpRegionServerMetrics {
/**
* Dump out a subset of regionserver mbeans only, not all of them, as json on System.out.
*/
public static String dumpMetrics() throws MalformedObjectNameException, IOException {
StringWriter sw = new StringWriter(1024 * 100); // Guess this size
try (PrintWriter writer = new PrintWriter(sw)) {
JSONBean dumper = new JSONBean();
try (JSONBean.Writer jsonBeanWriter = dumper.open(writer)) {
MBeanServer mbeanServer = ManagementFactory.getPlatformMBeanServer();
jsonBeanWriter.write(mbeanServer,
new ObjectName("java.lang:type=Memory"), null, false);
jsonBeanWriter.write(mbeanServer,
new ObjectName("Hadoop:service=HBase,name=RegionServer,sub=IPC"), null, false);
jsonBeanWriter.write(mbeanServer,
new ObjectName("Hadoop:service=HBase,name=RegionServer,sub=Replication"), null, false);
jsonBeanWriter.write(mbeanServer,
new ObjectName("Hadoop:service=HBase,name=RegionServer,sub=Server"), null, false);
}
}
sw.close();
return sw.toString();
}
public static void main(String[] args) throws IOException, MalformedObjectNameException {
String str = dumpMetrics();
System.out.println(str);
}
private DumpRegionServerMetrics() {}
}