ConcurrentCountMetric.java

// 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();
  }
}