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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  
19  package org.apache.hadoop.hbase.regionserver.wal;
20  
21  import org.apache.hadoop.hbase.classification.InterfaceAudience;
22  import org.apache.hadoop.hbase.metrics.BaseSourceImpl;
23  import org.apache.hadoop.metrics2.MetricHistogram;
24  import org.apache.hadoop.metrics2.lib.MutableCounterLong;
25  
26  
27  /**
28   * Class that transitions metrics from MetricsWAL into the metrics subsystem.
29   *
30   * Implements BaseSource through BaseSourceImpl, following the pattern.
31   * @see org.apache.hadoop.hbase.regionserver.wal.MetricsWAL
32   */
33  @InterfaceAudience.Private
34  public class MetricsWALSourceImpl extends BaseSourceImpl implements MetricsWALSource {
35  
36    private final MetricHistogram appendSizeHisto;
37    private final MetricHistogram appendTimeHisto;
38    private final MetricHistogram syncTimeHisto;
39    private final MutableCounterLong appendCount;
40    private final MutableCounterLong slowAppendCount;
41    private final MutableCounterLong logRollRequested;
42    private final MutableCounterLong lowReplicationLogRollRequested;
43  
44    public MetricsWALSourceImpl() {
45      this(METRICS_NAME, METRICS_DESCRIPTION, METRICS_CONTEXT, METRICS_JMX_CONTEXT);
46    }
47  
48    public MetricsWALSourceImpl(String metricsName,
49                                String metricsDescription,
50                                String metricsContext,
51                                String metricsJmxContext) {
52      super(metricsName, metricsDescription, metricsContext, metricsJmxContext);
53  
54      //Create and store the metrics that will be used.
55      appendTimeHisto = this.getMetricsRegistry().newTimeHistogram(APPEND_TIME, APPEND_TIME_DESC);
56      appendSizeHisto = this.getMetricsRegistry().newSizeHistogram(APPEND_SIZE, APPEND_SIZE_DESC);
57      appendCount = this.getMetricsRegistry().newCounter(APPEND_COUNT, APPEND_COUNT_DESC, 0l);
58      slowAppendCount =
59          this.getMetricsRegistry().newCounter(SLOW_APPEND_COUNT, SLOW_APPEND_COUNT_DESC, 0l);
60      syncTimeHisto = this.getMetricsRegistry().newTimeHistogram(SYNC_TIME, SYNC_TIME_DESC);
61      logRollRequested =
62          this.getMetricsRegistry().newCounter(ROLL_REQUESTED, ROLL_REQUESTED_DESC, 0L);
63      lowReplicationLogRollRequested = this.getMetricsRegistry()
64          .newCounter(LOW_REPLICA_ROLL_REQUESTED, LOW_REPLICA_ROLL_REQUESTED_DESC, 0L);
65    }
66  
67    @Override
68    public void incrementAppendSize(long size) {
69      appendSizeHisto.add(size);
70    }
71  
72    @Override
73    public void incrementAppendTime(long time) {
74      appendTimeHisto.add(time);
75    }
76  
77    @Override
78    public void incrementAppendCount() {
79      appendCount.incr();
80    }
81  
82    @Override
83    public void incrementSlowAppendCount() {
84      slowAppendCount.incr();
85    }
86  
87    @Override
88    public void incrementSyncTime(long time) {
89      syncTimeHisto.add(time);
90    }
91  
92    @Override
93    public void incrementLogRollRequested() {
94      logRollRequested.incr();
95    }
96  
97    @Override
98    public void incrementLowReplicationLogRoll() {
99      lowReplicationLogRollRequested.incr();
100   }
101 
102   @Override
103   public long getSlowAppendCount() {
104     return slowAppendCount.value();
105   }
106 }