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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.handler;
import com.google.common.util.concurrent.AbstractFuture;
/**
* <p>This class provides an implementation of {@link CompletionHandler} that allows you to wait for either {@link
* #completed()} or {@link #failed(Throwable)} to be called. If failed() was called, the corresponding Throwable will
* be rethrown when calling either of the get() methods. Unless an exception is thrown, the get() methods will always
* return Boolean.TRUE.</p>
*
* <p>Notice that calling {@link #cancel(boolean)} throws an UnsupportedOperationException.</p>
*
* @author <a href="mailto:simon@yahoo-inc.com">Simon Thoresen</a>
*/
public final class FutureCompletion extends AbstractFuture<Boolean> implements CompletionHandler {
@Override
public void completed() {
set(true);
}
@Override
public void failed(Throwable t) {
setException(t);
}
@Override
public final boolean cancel(boolean mayInterruptIfRunning) {
throw new UnsupportedOperationException();
}
@Override
public final boolean isCancelled() {
return false;
}
}
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