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/*
* Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.util.Collection;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.TimeUnit;
/**
* Wraps an ExecutorService to allow ExecutorService and Future's default
* methods to be tested.
*/
class DelegatingExecutorService implements ExecutorService {
private final ExecutorService delegate;
DelegatingExecutorService(ExecutorService delegate) {
this.delegate = delegate;
}
private <V> Future<V> wrap(Future<V> future) {
return new Future<V>() {
@Override
public boolean cancel(boolean mayInterruptIfRunning) {
return future.cancel(mayInterruptIfRunning);
}
@Override
public boolean isCancelled() {
return future.isCancelled();
}
@Override
public boolean isDone() {
return future.isDone();
}
@Override
public V get() throws InterruptedException, ExecutionException {
return future.get();
}
@Override
public V get(long timeout, TimeUnit unit)
throws InterruptedException, ExecutionException, TimeoutException {
return future.get(timeout, unit);
}
};
};
@Override
public void shutdown() {
delegate.shutdown();
}
@Override
public List<Runnable> shutdownNow() {
return delegate.shutdownNow();
}
@Override
public boolean isShutdown() {
return delegate.isShutdown();
}
@Override
public boolean isTerminated() {
return delegate.isTerminated();
}
@Override
public boolean awaitTermination(long timeout, TimeUnit unit)
throws InterruptedException {
return delegate.awaitTermination(timeout, unit);
}
@Override
public <T> Future<T> submit(Callable<T> task) {
return wrap(delegate.submit(task));
}
@Override
public <T> Future<T> submit(Runnable task, T result) {
return wrap(delegate.submit(task, result));
}
@Override
public Future<?> submit(Runnable task) {
return wrap(delegate.submit(task));
}
@Override
public <T> List<Future<T>> invokeAll(Collection<? extends Callable<T>> tasks)
throws InterruptedException {
return delegate.invokeAll(tasks).stream().map(f -> wrap(f)).toList();
}
@Override
public <T> List<Future<T>> invokeAll(Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit)
throws InterruptedException {
return delegate.invokeAll(tasks, timeout, unit).stream().map(f -> wrap(f)).toList();
}
@Override
public <T> T invokeAny(Collection<? extends Callable<T>> tasks)
throws InterruptedException, ExecutionException {
return delegate.invokeAny(tasks);
}
@Override
public <T> T invokeAny(Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit)
throws InterruptedException, ExecutionException, TimeoutException {
return delegate.invokeAny(tasks, timeout, unit);
}
@Override
public void execute(Runnable task) {
delegate.execute(task);
}
}
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