57 lines
2.2 KiB
Java
57 lines
2.2 KiB
Java
/*
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* Copyright 2016 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* https://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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.util.concurrent;
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import io.netty.util.internal.ObjectUtil;
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import io.netty.util.internal.logging.InternalLogger;
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import io.netty.util.internal.logging.InternalLoggerFactory;
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/**
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*
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* @deprecated use {@link PromiseNotifier#cascade(boolean, Future, Promise)}.
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*/
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@Deprecated
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public final class UnaryPromiseNotifier<T> implements FutureListener<T> {
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private static final InternalLogger logger = InternalLoggerFactory.getInstance(UnaryPromiseNotifier.class);
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private final Promise<? super T> promise;
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public UnaryPromiseNotifier(Promise<? super T> promise) {
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this.promise = ObjectUtil.checkNotNull(promise, "promise");
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}
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@Override
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public void operationComplete(Future<T> future) throws Exception {
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cascadeTo(future, promise);
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}
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public static <X> void cascadeTo(Future<X> completedFuture, Promise<? super X> promise) {
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if (completedFuture.isSuccess()) {
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if (!promise.trySuccess(completedFuture.getNow())) {
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logger.warn("Failed to mark a promise as success because it is done already: {}", promise);
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}
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} else if (completedFuture.isCancelled()) {
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if (!promise.cancel(false)) {
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logger.warn("Failed to cancel a promise because it is done already: {}", promise);
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}
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} else {
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if (!promise.tryFailure(completedFuture.cause())) {
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logger.warn("Failed to mark a promise as failure because it's done already: {}", promise,
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completedFuture.cause());
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}
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}
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}
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}
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