SimpleChannelPool.java — netty Source File

Source Code

/*
 * Copyright 2015 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.pool;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.EventLoop;
import io.netty.util.AttributeKey;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.FutureListener;
import io.netty.util.concurrent.GlobalEventExecutor;
import io.netty.util.concurrent.Promise;
import io.netty.util.internal.PlatformDependent;

import java.util.Deque;
import java.util.concurrent.Callable;

import static io.netty.util.internal.ObjectUtil.*;

/**
 * Simple {@link ChannelPool} implementation which will create new {@link Channel}s if someone tries to acquire
 * a {@link Channel} but none is in the pool atm. No limit on the maximal concurrent {@link Channel}s is enforced.
 *
 * This implementation uses LIFO order for {@link Channel}s in the {@link ChannelPool}.
 *
 */
public class SimpleChannelPool implements ChannelPool {
    private static final AttributeKey<SimpleChannelPool> POOL_KEY =
        AttributeKey.newInstance("io.netty.channel.pool.SimpleChannelPool");
    private final Deque<Channel> deque = PlatformDependent.newConcurrentDeque();
    private final ChannelPoolHandler handler;
    private final ChannelHealthChecker healthCheck;
    private final Bootstrap bootstrap;
    private final boolean releaseHealthCheck;
    private final boolean lastRecentUsed;

    /**
     * Creates a new instance using the {@link ChannelHealthChecker#ACTIVE}.
     *
     * @param bootstrap         the {@link Bootstrap} that is used for connections
     * @param handler           the {@link ChannelPoolHandler} that will be notified for the different pool actions
     */
    public SimpleChannelPool(Bootstrap bootstrap, final ChannelPoolHandler handler) {
        this(bootstrap, handler, ChannelHealthChecker.ACTIVE);
// ... (366 more lines)