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/*
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2019 AT&T Intellectual Property. 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.common.utils.time;
import java.util.concurrent.CountDownLatch;
/**
* Work item used when a thread invokes sleep(). The thread's "sleep()" method will
* enqueue this item and then invoke {@link #await()} to wait for the test/controlling
* thread to fire it, indicating that the end of the sleep time has been reached.
*/
public class SleepItem extends WorkItem {
/**
* Thread that invoked "sleep()".
*/
private final Thread thread;
/**
* This will be decremented when this work item is fired, thus releasing the
* "sleeping" thread to continue its work.
*/
private final CountDownLatch latch = new CountDownLatch(1);
/**
* Constructs the object.
*
* @param currentTime time with which this item is associated
* @param sleepMs time for which the thread should sleep
* @param thread thread that invoked "sleep()"
*/
public SleepItem(TestTime currentTime, long sleepMs, Thread thread) {
super(currentTime, sleepMs);
this.thread = thread;
}
@Override
public void interrupt() {
thread.interrupt();
}
@Override
public void fire() {
latch.countDown();
}
/**
* Waits for the sleep time to be reached.
*
* @throws InterruptedException if the current thread is interrupted
*/
public void await() throws InterruptedException {
latch.await();
}
@Override
public String toString() {
return "SleepItem [nextMs=" + getNextMs() + ", latch=" + latch + ", thread=" + thread + "]";
}
}
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