ResponseBag.java

/**
* Copyright 2014 The CmRaft Project
*
* 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 com.chicm.cmraft.log;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

public class ResponseBag<T> {
  private Map<T, Integer> map = new ConcurrentHashMap<T, Integer>();
  
  public synchronized void add(T key, int number) {
    int currentNumber = map.get(key) == null? 0: map.get(key);
    map.put(key, number+currentNumber);
  }
  
  public int get(T key) {
    return map.get(key) == null ? 0 : map.get(key);
  }
}