org.apache.flink.runtime.iterative.concurrent.SolutionSetUpdateBarrier Maven / Gradle / Ivy
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* 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,
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*/
package org.apache.flink.runtime.iterative.concurrent;
import org.apache.flink.runtime.iterative.task.IterationHeadTask;
import org.apache.flink.runtime.iterative.task.IterationTailTask;
import java.util.concurrent.CountDownLatch;
/**
* Resettable barrier to synchronize the
* {@link IterationHeadTask} and
* the {@link IterationTailTask} in case of
* iterations that contain a separate solution set tail.
*/
public class SolutionSetUpdateBarrier {
private CountDownLatch latch;
public void setup() {
latch = new CountDownLatch(1);
}
/**
* Waits (blocking) on barrier.
*
* @throws InterruptedException
*/
public void waitForSolutionSetUpdate() throws InterruptedException {
latch.await();
}
/**
* Releases the waiting thread.
*/
public void notifySolutionSetUpdate() {
latch.countDown();
}
}