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19 package org.apache.hadoop.metrics2.lib;
20
21 import org.apache.hadoop.hbase.util.Counter;
22 import org.apache.hadoop.metrics2.MetricsInfo;
23 import org.apache.hadoop.metrics2.MetricsRecordBuilder;
24
25 public class MutableFastCounter extends MutableCounter {
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27 private final Counter counter;
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29 protected MutableFastCounter(MetricsInfo info, long iVal) {
30 super(info);
31 counter = new Counter(iVal);
32 }
33
34 @Override
35 public void incr() {
36 counter.increment();
37 setChanged();
38 }
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44 public void incr(long delta) {
45 counter.add(delta);
46 setChanged();
47 }
48
49 @Override
50 public void snapshot(MetricsRecordBuilder builder, boolean all) {
51 if (all || changed()) {
52 builder.addCounter(info(), value());
53 clearChanged();
54 }
55 }
56
57 public long value() {
58 return counter.get();
59 }
60 }