View Javadoc

1   /**
2    * Copyright 2010 The Apache Software Foundation
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *     http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing, software
15   * distributed under the License is distributed on an "AS IS" BASIS,
16   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17   * See the License for the specific language governing permissions and
18   * limitations under the License.
19   */
20  
21  package org.apache.hadoop.hbase.ipc;
22  
23  import org.apache.hadoop.metrics.util.MBeanUtil;
24  import org.apache.hadoop.metrics.util.MetricsDynamicMBeanBase;
25  import org.apache.hadoop.metrics.util.MetricsRegistry;
26  
27  import javax.management.ObjectName;
28  
29  /**
30   * Exports HBase RPC statistics recorded in {@link HBaseRpcMetrics} as an MBean
31   * for JMX monitoring.
32   */
33  public class HBaseRPCStatistics extends MetricsDynamicMBeanBase {
34    private final ObjectName mbeanName;
35  
36    @SuppressWarnings({"UnusedDeclaration"})
37    public HBaseRPCStatistics(MetricsRegistry registry,
38        String hostName, String port) {
39  	  super(registry, "Metrics for RPC server instance");
40  
41      String name = String.format("RPCStatistics-%s",
42          (port != null ? port : "unknown"));
43  
44      mbeanName = MBeanUtil.registerMBean("HBase", name, this);
45    }
46  
47    public void shutdown() {
48      if (mbeanName != null)
49        MBeanUtil.unregisterMBean(mbeanName);
50    }
51  
52  }