org.apache.activemq.artemis.utils.SimpleFutureImpl Maven / Gradle / Ivy
/**
* 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 org.apache.activemq.artemis.utils;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
public class SimpleFutureImpl implements SimpleFuture {
public SimpleFutureImpl() {
}
V value;
Throwable exception;
private final CountDownLatch latch = new CountDownLatch(1);
boolean canceled = false;
@Override
public boolean cancel(boolean mayInterruptIfRunning) {
canceled = true;
latch.countDown();
return true;
}
@Override
public boolean isCancelled() {
return canceled;
}
@Override
public boolean isDone() {
return latch.getCount() <= 0;
}
@Override
public void fail(Throwable e) {
this.exception = e;
latch.countDown();
}
@Override
public V get() throws InterruptedException, ExecutionException {
latch.await();
if (this.exception != null) {
throw new ExecutionException(this.exception);
}
return value;
}
@Override
public void set(V v) {
this.value = v;
latch.countDown();
}
@Override
public V get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException {
latch.await(timeout, unit);
return value;
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy