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.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 {
26
27 private final Counter counter;
28
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 }
39
40 /**
41 * Increment the value by a delta
42 * @param delta of the increment
43 */
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 }