| // Copyright 2016 Twitter. All rights reserved. |
| // |
| // Licensed 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 com.twitter.heron.api.metric; |
| |
| // A thread safe count metric |
| public class ConcurrentCountMetric implements IMetric<Long> { |
| private CountMetric counter; |
| |
| public ConcurrentCountMetric() { |
| counter = new CountMetric(); |
| } |
| |
| public synchronized void incr() { |
| counter.incr(); |
| } |
| |
| public synchronized void incrBy(long incrementBy) { |
| counter.incrBy(incrementBy); |
| } |
| |
| @Override |
| public synchronized Long getValueAndReset() { |
| return counter.getValueAndReset(); |
| } |
| } |