org.xnio.FinishedIoFuture Maven / Gradle / Ivy
package org.xnio;
import java.io.IOException;
import java.util.concurrent.CancellationException;
import java.util.concurrent.TimeUnit;
import static org.xnio.IoFuture.Status.DONE;
/**
* An implementation of {@link IoFuture} that represents an immediately-successful operation.
*
* @param the type of result that this operation produces
*/
public class FinishedIoFuture implements IoFuture {
private final T result;
/**
* Create an instance.
*
* @param result the operation result
*/
public FinishedIoFuture(T result) {
this.result = result;
}
/**
* Cancel the operation. Since this operation is always complete, this is a no-op.
*
* @return this instance
*/
public IoFuture cancel() {
return this;
}
@Override
public Status getStatus() {
return DONE;
}
@Override
public Status await() {
return DONE;
}
@Override
public Status await(final long time, final TimeUnit timeUnit) {
return DONE;
}
@Override
public Status awaitInterruptibly() throws InterruptedException {
return DONE;
}
@Override
public Status awaitInterruptibly(final long time, final TimeUnit timeUnit) throws InterruptedException {
return DONE;
}
@Override
public T get() throws IOException, CancellationException {
return result;
}
@Override
public T getInterruptibly() throws IOException, InterruptedException, CancellationException {
return result;
}
@Override
public IOException getException() throws IllegalStateException {
throw new IllegalStateException();
}
@Override
public IoFuture addNotifier(final Notifier notifier, final A attachment) {
notifier.notify(this, attachment);
return this;
}
}