| /* |
| * 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() {} |
| } |