/*
* Copyright 2014 NAVER Corp.
*
* 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 com.navercorp.pinpoint.rpc.client;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* @author Taejin Koo
*/
public class ConnectFuture {
private final Logger logger = LoggerFactory.getLogger(this.getClass());
private static final AtomicReferenceFieldUpdater<ConnectFuture, Result> FIELD_UPDATER = AtomicReferenceFieldUpdater.newUpdater(ConnectFuture.class, Result.class, "result");
private final CountDownLatch latch;
private volatile Result result;
public enum Result {
SUCCESS, FAIL
}
public ConnectFuture() {
this.latch = new CountDownLatch(1);
}
public Result getResult() {
return this.result;
}
void setResult(Result connectResult) {
final Result result = this.result;
if (result == null) {
if (FIELD_UPDATER.compareAndSet(this, null, connectResult)) {
latch.countDown();
}
}
}
public void await() throws InterruptedException {
latch.await();
}
public boolean await(long timeout, TimeUnit timeUnit) throws InterruptedException {
return latch.await(timeout, timeUnit);
}
public void awaitUninterruptibly() {
while (true) {
try {
await();
return;
} catch (InterruptedException e) {
logger.debug(e.getMessage(), e);
}
}
}
}