io.netty.util.concurrent.PromiseAggregator Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
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/*
* Copyright 2014 The Netty Project
*
* The Netty Project licenses this file to you 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:
*
* https://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 io.netty.util.concurrent;
import io.netty.util.internal.ObjectUtil;
import java.util.LinkedHashSet;
import java.util.Set;
/**
* @deprecated Use {@link PromiseCombiner#PromiseCombiner(EventExecutor)}.
*
* {@link GenericFutureListener} implementation which consolidates multiple {@link Future}s
* into one, by listening to individual {@link Future}s and producing an aggregated result
* (success/failure) when all {@link Future}s have completed.
*
* @param the type of value returned by the {@link Future}
* @param the type of {@link Future}
*/
@Deprecated
public class PromiseAggregator> implements GenericFutureListener {
private final Promise aggregatePromise;
private final boolean failPending;
private Set> pendingPromises;
/**
* Creates a new instance.
*
* @param aggregatePromise the {@link Promise} to notify
* @param failPending {@code true} to fail pending promises, false to leave them unaffected
*/
public PromiseAggregator(Promise aggregatePromise, boolean failPending) {
this.aggregatePromise = ObjectUtil.checkNotNull(aggregatePromise, "aggregatePromise");
this.failPending = failPending;
}
/**
* See {@link PromiseAggregator#PromiseAggregator(Promise, boolean)}.
* Defaults {@code failPending} to true.
*/
public PromiseAggregator(Promise aggregatePromise) {
this(aggregatePromise, true);
}
/**
* Add the given {@link Promise}s to the aggregator.
*/
@SafeVarargs
public final PromiseAggregator add(Promise... promises) {
ObjectUtil.checkNotNull(promises, "promises");
if (promises.length == 0) {
return this;
}
synchronized (this) {
if (pendingPromises == null) {
int size;
if (promises.length > 1) {
size = promises.length;
} else {
size = 2;
}
pendingPromises = new LinkedHashSet>(size);
}
for (Promise p : promises) {
if (p == null) {
continue;
}
pendingPromises.add(p);
p.addListener(this);
}
}
return this;
}
@Override
public synchronized void operationComplete(F future) throws Exception {
if (pendingPromises == null) {
aggregatePromise.setSuccess(null);
} else {
pendingPromises.remove(future);
if (!future.isSuccess()) {
Throwable cause = future.cause();
aggregatePromise.setFailure(cause);
if (failPending) {
for (Promise pendingFuture : pendingPromises) {
pendingFuture.setFailure(cause);
}
}
} else {
if (pendingPromises.isEmpty()) {
aggregatePromise.setSuccess(null);
}
}
}
}
}