ManualClock.java

/**
 * The MIT License
 * Copyright © 2010 JmxTrans team
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.googlecode.jmxtrans.util;

import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;

import static java.util.concurrent.TimeUnit.MILLISECONDS;

public class ManualClock implements Clock {

	private volatile AtomicLong currentTimeMillis = new AtomicLong(0l);

	public ManualClock() {
		setTime(0L, MILLISECONDS);
	}

	public ManualClock(long time, TimeUnit unit) {
		setTime(time, unit);
	}

	@Override
	public long currentTimeMillis() {
		return currentTimeMillis.get();
	}

	public void setTime(long time, TimeUnit unit) {
		currentTimeMillis.set(MILLISECONDS.convert(time, unit));
	}

	public void waitFor(long duration, TimeUnit unit) {
		currentTimeMillis.addAndGet(MILLISECONDS.convert(duration, unit));
	}
}