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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.MutableFastCounter;
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 MutableFastCounter appendCount;
40    private final MutableFastCounter slowAppendCount;
41    private final MutableFastCounter logRollRequested;
42    private final MutableFastCounter lowReplicationLogRollRequested;
43    private final MutableFastCounter writtenBytes;
44  
45    public MetricsWALSourceImpl() {
46      this(METRICS_NAME, METRICS_DESCRIPTION, METRICS_CONTEXT, METRICS_JMX_CONTEXT);
47    }
48  
49    public MetricsWALSourceImpl(String metricsName,
50                                String metricsDescription,
51                                String metricsContext,
52                                String metricsJmxContext) {
53      super(metricsName, metricsDescription, metricsContext, metricsJmxContext);
54  
55      //Create and store the metrics that will be used.
56      appendTimeHisto = this.getMetricsRegistry().newTimeHistogram(APPEND_TIME, APPEND_TIME_DESC);
57      appendSizeHisto = this.getMetricsRegistry().newSizeHistogram(APPEND_SIZE, APPEND_SIZE_DESC);
58      appendCount = this.getMetricsRegistry().newCounter(APPEND_COUNT, APPEND_COUNT_DESC, 0l);
59      slowAppendCount =
60          this.getMetricsRegistry().newCounter(SLOW_APPEND_COUNT, SLOW_APPEND_COUNT_DESC, 0l);
61      syncTimeHisto = this.getMetricsRegistry().newTimeHistogram(SYNC_TIME, SYNC_TIME_DESC);
62      logRollRequested =
63          this.getMetricsRegistry().newCounter(ROLL_REQUESTED, ROLL_REQUESTED_DESC, 0L);
64      lowReplicationLogRollRequested = this.getMetricsRegistry()
65          .newCounter(LOW_REPLICA_ROLL_REQUESTED, LOW_REPLICA_ROLL_REQUESTED_DESC, 0L);
66      writtenBytes = this.getMetricsRegistry().newCounter(WRITTEN_BYTES, WRITTEN_BYTES_DESC, 0l);
67    }
68  
69    @Override
70    public void incrementAppendSize(long size) {
71      appendSizeHisto.add(size);
72    }
73  
74    @Override
75    public void incrementAppendTime(long time) {
76      appendTimeHisto.add(time);
77    }
78  
79    @Override
80    public void incrementAppendCount() {
81      appendCount.incr();
82    }
83  
84    @Override
85    public void incrementSlowAppendCount() {
86      slowAppendCount.incr();
87    }
88  
89    @Override
90    public void incrementSyncTime(long time) {
91      syncTimeHisto.add(time);
92    }
93  
94    @Override
95    public void incrementLogRollRequested() {
96      logRollRequested.incr();
97    }
98  
99    @Override
100   public void incrementLowReplicationLogRoll() {
101     lowReplicationLogRollRequested.incr();
102   }
103 
104   @Override
105   public long getSlowAppendCount() {
106     return slowAppendCount.value();
107   }
108 
109   @Override
110   public void incrementWrittenBytes(long val) {
111     writtenBytes.incr(val);
112   }
113 
114   @Override
115   public long getWrittenBytes() {
116     return writtenBytes.value();
117   }
118 
119 }