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