MultiThreadIoEventLoopGroup.java — netty Source File

Source Code

/*
 * Copyright 2024 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.channel;

import io.netty.util.concurrent.EventExecutorChooserFactory;
import io.netty.util.internal.EmptyArrays;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.Executor;
import java.util.concurrent.ThreadFactory;

/**
 * {@link IoEventLoopGroup} implementation that will handle its tasks with multiple threads.
 * <p>
 * This group supports advanced thread management strategies, such as dynamic auto-scaling,
 * by providing a custom {@link EventExecutorChooserFactory}. To enable utilization-based
 * auto-scaling, pass an instance of
 * {@link io.netty.util.concurrent.AutoScalingEventExecutorChooserFactory}.
 */
public class MultiThreadIoEventLoopGroup extends MultithreadEventLoopGroup implements IoEventLoopGroup {

    /**
     * Creates a new instance of the {@link MultiThreadIoEventLoopGroup} using the default number
     * of threads and default {@link ThreadFactory}.
     */
    public MultiThreadIoEventLoopGroup(IoHandlerFactory ioHandlerFactory) {
        this(0, ioHandlerFactory);
    }

    /**
     /**
     * Creates a new instance of the {@link MultiThreadIoEventLoopGroup} using the default {@link ThreadFactory}.
     *
     * @param nThreads          the number of threads and so {@link EventLoop}s that are created.
     * @param ioHandlerFactory  the {@link IoHandlerFactory} that will be used to create {@link IoHandler} for handling
     *                          IO.
     */
    public MultiThreadIoEventLoopGroup(int nThreads, IoHandlerFactory ioHandlerFactory) {
        this(nThreads, (Executor) null, ioHandlerFactory);
    }

    /**
     * Create a new instance using the default number of thread.
     *
     * @param threadFactory     the {@link ThreadFactory} that is used.
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