io.netty.bootstrap.Bootstrap Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).
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/*
 * Copyright 2012 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:
 *
 *   http://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.bootstrap;

import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelOption;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.ChannelPromise;
import io.netty.util.AttributeKey;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;

import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.util.Map;
import java.util.Map.Entry;

/**
 * A {@link Bootstrap} that makes it easy to bootstrap a {@link Channel} to use
 * for clients.
 *
 * The {@link #bind()} methods are useful in combination with connectionless transports such as datagram (UDP).
 * For regular TCP connections, please use the provided {@link #connect()} methods.
 */
public class Bootstrap extends AbstractBootstrap {

    private static final InternalLogger logger = InternalLoggerFactory.getInstance(Bootstrap.class);

    private volatile SocketAddress remoteAddress;

    public Bootstrap() { }

    private Bootstrap(Bootstrap bootstrap) {
        super(bootstrap);
        remoteAddress = bootstrap.remoteAddress;
    }

    /**
     * The {@link SocketAddress} to connect to once the {@link #connect()} method
     * is called.
     */
    public Bootstrap remoteAddress(SocketAddress remoteAddress) {
        this.remoteAddress = remoteAddress;
        return this;
    }

    /**
     * @see {@link #remoteAddress(SocketAddress)}
     */
    public Bootstrap remoteAddress(String inetHost, int inetPort) {
        remoteAddress = new InetSocketAddress(inetHost, inetPort);
        return this;
    }

    /**
     * @see {@link #remoteAddress(SocketAddress)}
     */
    public Bootstrap remoteAddress(InetAddress inetHost, int inetPort) {
        remoteAddress = new InetSocketAddress(inetHost, inetPort);
        return this;
    }

    /**
     * Connect a {@link Channel} to the remote peer.
     */
    public ChannelFuture connect() {
        validate();
        SocketAddress remoteAddress = this.remoteAddress;
        if (remoteAddress == null) {
            throw new IllegalStateException("remoteAddress not set");
        }

        return doConnect(remoteAddress, localAddress());
    }

    /**
     * Connect a {@link Channel} to the remote peer.
     */
    public ChannelFuture connect(String inetHost, int inetPort) {
        return connect(new InetSocketAddress(inetHost, inetPort));
    }

    /**
     * Connect a {@link Channel} to the remote peer.
     */
    public ChannelFuture connect(InetAddress inetHost, int inetPort) {
        return connect(new InetSocketAddress(inetHost, inetPort));
    }

    /**
     * Connect a {@link Channel} to the remote peer.
     */
    public ChannelFuture connect(SocketAddress remoteAddress) {
        if (remoteAddress == null) {
            throw new NullPointerException("remoteAddress");
        }

        validate();
        return doConnect(remoteAddress, localAddress());
    }

    /**
     * Connect a {@link Channel} to the remote peer.
     */
    public ChannelFuture connect(SocketAddress remoteAddress, SocketAddress localAddress) {
        if (remoteAddress == null) {
            throw new NullPointerException("remoteAddress");
        }
        validate();
        return doConnect(remoteAddress, localAddress);
    }

    /**
     * @see {@link #connect()}
     */
    private ChannelFuture doConnect(final SocketAddress remoteAddress, final SocketAddress localAddress) {
        final ChannelFuture regFuture = initAndRegister();
        final Channel channel = regFuture.channel();
        if (regFuture.cause() != null) {
            return regFuture;
        }

        final ChannelPromise promise = channel.newPromise();
        if (regFuture.isDone()) {
            doConnect0(regFuture, channel, remoteAddress, localAddress, promise);
        } else {
            regFuture.addListener(new ChannelFutureListener() {
                @Override
                public void operationComplete(ChannelFuture future) throws Exception {
                    doConnect0(regFuture, channel, remoteAddress, localAddress, promise);
                }
            });
        }

        return promise;
    }

    private static void doConnect0(
            final ChannelFuture regFuture, final Channel channel,
            final SocketAddress remoteAddress, final SocketAddress localAddress, final ChannelPromise promise) {

        // This method is invoked before channelRegistered() is triggered.  Give user handlers a chance to set up
        // the pipeline in its channelRegistered() implementation.
        channel.eventLoop().execute(new Runnable() {
            @Override
            public void run() {
                if (regFuture.isSuccess()) {
                    if (localAddress == null) {
                        channel.connect(remoteAddress, promise);
                    } else {
                        channel.connect(remoteAddress, localAddress, promise);
                    }
                    promise.addListener(ChannelFutureListener.CLOSE_ON_FAILURE);
                } else {
                    promise.setFailure(regFuture.cause());
                }
            }
        });
    }

    @Override
    @SuppressWarnings("unchecked")
    void init(Channel channel) throws Exception {
        ChannelPipeline p = channel.pipeline();
        p.addLast(handler());

        final Map, Object> options = options();
        synchronized (options) {
            for (Entry, Object> e: options.entrySet()) {
                try {
                    if (!channel.config().setOption((ChannelOption