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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jrt;
/**
* Invokes asynchronous JRT requests in a blocking method, that can be aborted by calling shutdown().
* This can be used when one would like to use invokeSync(), but when abortion is required.
* <p>
* This class is thread safe.
*
* @author <a href="mailto:havardpe@yahoo-inc.com">Haavard Pettersen</a>
*/
//@ThreadSafe
public class InvokeProxy {
private boolean active = true;
private Request pending = null;
public Request invoke(Request req, Target target, double timeout) {
SingleRequestWaiter waiter = null;
synchronized (this) {
if (active) {
waiter = new SingleRequestWaiter();
target.invokeAsync(req, timeout, waiter);
pending = req;
} else {
req.setError(ErrorCode.ABORT, "Aborted by user");
}
}
if (waiter != null) {
waiter.waitDone();
synchronized (this) {
pending = null;
}
}
return req;
}
public void shutdown() {
synchronized (this) {
active = false;
if (pending != null) {
pending.abort();
}
}
}
}
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