| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.hadoop.metrics2.lib; |
| |
| import org.apache.hadoop.metrics2.MetricsRecordBuilder; |
| |
| /** |
| * A mutable long counter |
| */ |
| public class MetricMutableCounterLong extends MetricMutableCounter<Long> { |
| |
| private volatile long value; |
| |
| /** |
| * Construct a mutable long counter |
| * @param name of the counter |
| * @param description of the counter |
| * @param initValue the initial value of the counter |
| */ |
| public MetricMutableCounterLong(String name, String description, |
| long initValue) { |
| super(name, description); |
| this.value = initValue; |
| } |
| |
| public synchronized void incr() { |
| ++value; |
| setChanged(); |
| } |
| |
| /** |
| * Increment the value by a delta |
| * @param delta of the increment |
| */ |
| public synchronized void incr(long delta) { |
| value += delta; |
| setChanged(); |
| } |
| |
| public void snapshot(MetricsRecordBuilder builder, boolean all) { |
| if (all || changed()) { |
| builder.addCounter(name, description, value); |
| clearChanged(); |
| } |
| } |
| |
| } |