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8511a9e67b
The pattern if (now > deadline) break; wait(deadline - now); is insufficient in case "now == deadline" because the result would be wait() being called with 0, which would mean "wait until notified". Thus, the timeout would become infinite.
67 lines
1.9 KiB
Java
67 lines
1.9 KiB
Java
/**
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*
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* Copyright 2015 Florian Schmaus
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.igniterealtime.smack.inttest.util;
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import java.util.concurrent.TimeoutException;
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import org.jivesoftware.smack.util.Objects;
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public class ResultSyncPoint<R, E extends Exception> {
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private R result;
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private E exception;
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public R waitForResult(long timeout) throws E, InterruptedException, TimeoutException {
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synchronized(this) {
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if (result != null) {
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return result;
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}
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if (exception != null) {
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throw exception;
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}
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final long deadline = System.currentTimeMillis() + timeout;
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while (result == null && exception == null) {
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final long now = System.currentTimeMillis();
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if (now >= deadline) break;
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wait(deadline - now);
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}
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}
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if (result != null) {
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return result;
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}
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if (exception != null) {
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throw exception;
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}
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throw new TimeoutException("Timeout expired");
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}
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public void signal(R result) {
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synchronized(this) {
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this.result = Objects.requireNonNull(result);
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notifyAll();
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}
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}
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public void signal(E exception) {
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synchronized(this) {
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this.exception = Objects.requireNonNull(exception);
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notifyAll();
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}
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}
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}
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