/*
* 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.flink.runtime.testutils;
import org.apache.flink.runtime.concurrent.Executors;
import java.util.List;
import java.util.concurrent.AbstractExecutorService;
import java.util.concurrent.Callable;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
/**
* This implements a variant of the {@link Executors#directExecutor()} that also implements the
* {@link ScheduledExecutorService} interface.
* Scheduled executables are actually scheduled, all other (call / execute) execute synchronously.
*/
public class DirectScheduledExecutorService extends AbstractExecutorService implements ScheduledExecutorService {
private final ScheduledExecutorService scheduledService =
java.util.concurrent.Executors.newSingleThreadScheduledExecutor();
// ------------------------------------------------------------------------
// Direct Executor
// ------------------------------------------------------------------------
@Override
public void execute(Runnable command) {
if (!isShutdown()) {
command.run();
} else {
throw new RejectedExecutionException();
}
}
// ------------------------------------------------------------------------
// Scheduled Executor
// ------------------------------------------------------------------------
@Override
public ScheduledFuture<?> schedule(Runnable command, long delay, TimeUnit unit) {
return scheduledService.schedule(command, delay, unit);
}
@Override
public <V> ScheduledFuture<V> schedule(Callable<V> callable, long delay, TimeUnit unit) {
return scheduledService.schedule(callable, delay, unit);
}
@Override
public ScheduledFuture<?> scheduleAtFixedRate(Runnable command, long initialDelay, long period, TimeUnit unit) {
return scheduledService.scheduleAtFixedRate(command, initialDelay, period, unit);
}
@Override
public ScheduledFuture<?> scheduleWithFixedDelay(Runnable command, long initialDelay, long delay, TimeUnit unit) {
return scheduledService.scheduleWithFixedDelay(command, initialDelay, delay, unit);
}
// ------------------------------------------------------------------------
// Shutdown
// ------------------------------------------------------------------------
@Override
public void shutdown() {
scheduledService.shutdown();
}
@Override
public List<Runnable> shutdownNow() {
return scheduledService.shutdownNow();
}
@Override
public boolean isShutdown() {
return scheduledService.isShutdown();
}
@Override
public boolean isTerminated() {
return scheduledService.isTerminated();
}
@Override
public boolean awaitTermination(long timeout, TimeUnit unit) throws InterruptedException {
return scheduledService.awaitTermination(timeout, unit);
}
}