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ChunkQueueMetrics xref
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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.hadoop.chukwa.datacollection.agent.metrics;
19  
20  import org.apache.hadoop.metrics.MetricsContext;
21  import org.apache.hadoop.metrics.MetricsRecord;
22  import org.apache.hadoop.metrics.MetricsUtil;
23  import org.apache.hadoop.metrics.Updater;
24  import org.apache.hadoop.metrics.util.MetricsBase;
25  import org.apache.hadoop.metrics.util.MetricsIntValue;
26  import org.apache.hadoop.metrics.util.MetricsLongValue;
27  import org.apache.hadoop.metrics.util.MetricsRegistry;
28  import org.apache.hadoop.metrics.util.MetricsTimeVaryingInt;
29  
30  public class ChunkQueueMetrics implements Updater {
31  
32    public MetricsRegistry registry = new MetricsRegistry();
33    private MetricsRecord metricsRecord;
34    private ChunkQueueActivityMBean mbean;
35  
36  
37    public MetricsIntValue queueSize =
38      new MetricsIntValue("queueSize", registry,"Queue size");
39    
40    public MetricsLongValue dataSize =
41      new MetricsLongValue("dataSize", registry,"Data size");
42    
43    public MetricsTimeVaryingInt addedChunk =
44      new MetricsTimeVaryingInt("addedChunk", registry,"number of added chunk");
45    
46    public MetricsTimeVaryingInt removedChunk =
47      new MetricsTimeVaryingInt("removedChunk", registry,"number of removed chunk");
48    
49    public MetricsIntValue fullQueue =
50      new MetricsIntValue("fullQueue", registry,"Queue is full");
51    
52    
53    /** Creates a new instance of QueueMetrics 
54     * @param processName is jvm process of Agent process
55     * @param recordName is mbean record name
56     * */
57    public ChunkQueueMetrics(String processName, String recordName) {
58        MetricsContext context = MetricsUtil.getContext(processName);
59        metricsRecord = MetricsUtil.createRecord(context, recordName);
60        mbean = new ChunkQueueActivityMBean(registry, recordName);
61        context.registerUpdater(this);
62        
63    }
64  
65  
66    /**
67     * Since this object is a registered updater, this method will be called
68     * periodically, e.g. every 5 seconds.
69     */
70    public void doUpdates(MetricsContext unused) {
71      synchronized (this) {
72        for (MetricsBase m : registry.getMetricsList()) {
73          m.pushMetric(metricsRecord);
74        }
75      }
76      metricsRecord.update();
77    }
78  
79    public void shutdown() {
80      if (mbean != null)
81        mbean.shutdown();
82    }
83  
84  }