FixedChannelPool.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 static io.netty.util.internal.ObjectUtil.checkPositive;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.util.concurrent.EventExecutor;
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.ObjectUtil;

import java.nio.channels.ClosedChannelException;
import java.util.ArrayDeque;
import java.util.Queue;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.Callable;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

/**
 * {@link ChannelPool} implementation that takes another {@link ChannelPool} implementation and enforce a maximum
 * number of concurrent connections.
 */
public class FixedChannelPool extends SimpleChannelPool {

    public enum AcquireTimeoutAction {
        /**
         * Create a new connection when the timeout is detected.
         */
        NEW,

        /**
         * Fail the {@link Future} of the acquire call with a {@link TimeoutException}.
         */
        FAIL
    }

    private final EventExecutor executor;
    private final long acquireTimeoutNanos;
    private final Runnable timeoutTask;

    // There is no need to worry about synchronization as everything that modified the queue or counts is done
// ... (467 more lines)