UnorderedThreadPoolEventExecutor.java — netty Source File

Source Code

/*
 * Copyright 2016 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.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;
import org.jetbrains.annotations.NotNull;

import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.concurrent.Callable;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.Delayed;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.RejectedExecutionHandler;
import java.util.concurrent.RunnableScheduledFuture;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;

import static java.util.concurrent.TimeUnit.NANOSECONDS;

/**
 * {@link EventExecutor} implementation which makes no guarantees about the ordering of task execution that
 * are submitted because there may be multiple threads executing these tasks.
 * This implementation is most useful for protocols that do not need strict ordering.
 * <p>
 * <strong>Because it provides no ordering, care should be taken when using it!</strong>
 *
 * @deprecated The behavior of this event executor deviates from the typical Netty execution model
 * and can cause subtle issues as a result.
 * Applications that wish to process messages with greater parallelism, should instead do explicit
 * off-loading to their own thread-pools.
 */
@Deprecated
public final class UnorderedThreadPoolEventExecutor extends ScheduledThreadPoolExecutor implements EventExecutor {
    private static final InternalLogger logger = InternalLoggerFactory.getInstance(
            UnorderedThreadPoolEventExecutor.class);

    private final Promise<?> terminationFuture = GlobalEventExecutor.INSTANCE.newPromise();
    private final Set<EventExecutor> executorSet = Collections.singleton(this);
    private final Set<Thread> eventLoopThreads = ConcurrentHashMap.newKeySet();

    /**
     * Calls {@link UnorderedThreadPoolEventExecutor#UnorderedThreadPoolEventExecutor(int, ThreadFactory)}
// ... (269 more lines)