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/*
* Copyright (C) 2011 The Guava Authors
*
* 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.
*/
package org.glassfish.jersey.internal.guava;
import java.util.concurrent.CancellationException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
/**
* Utilities for treating interruptible operations as uninterruptible.
* In all cases, if a thread is interrupted during such a call, the call
* continues to block until the result is available or the timeout elapses,
* and only then re-interrupts the thread.
*
* @author Anthony Zana
* @since 10.0
*/
final class Uninterruptibles {
// Implementation Note: As of 3-7-11, the logic for each blocking/timeout
// methods is identical, save for method being invoked.
private Uninterruptibles() {
}
/**
* Invokes {@code future.}{@link Future#get() get()} uninterruptibly.
* To get uninterruptibility and remove checked exceptions, see
* {@link Futures#getUnchecked}.
*
*
If instead, you wish to treat {@link InterruptedException} uniformly
* with other exceptions, see {@link Futures#get(Future, Class) Futures.get}
* or {@link Futures#makeChecked}.
*
* @throws ExecutionException if the computation threw an exception
* @throws CancellationException if the computation was cancelled
*/
public static V getUninterruptibly(Future future)
throws ExecutionException {
boolean interrupted = false;
try {
while (true) {
try {
return future.get();
} catch (InterruptedException e) {
interrupted = true;
}
}
} finally {
if (interrupted) {
Thread.currentThread().interrupt();
}
}
}
}