CounterGenerator.java

/*
 * Copyright (c) 2010 Yahoo! Inc. 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. See accompanying LICENSE file.
 */

package voldemort.performance.benchmark.generator;

/**
 * Generates a sequence of integers 0, 1, ...
 */
public class CounterGenerator extends IntegerGenerator {

    private int counter;

    public CounterGenerator(int countStart) {
        counter = countStart;
        setLastInt(countStart - 1);
    }

    @Override
    public synchronized int nextInt() {
        int lastInt = counter;
        counter++;
        setLastInt(lastInt);
        return lastInt;
    }

}