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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging 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.example.socksproxy;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelOption;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.socks.SocksCmdRequest;
import io.netty.handler.codec.socks.SocksCmdResponse;
import io.netty.handler.codec.socks.SocksCmdStatus;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.GenericFutureListener;
import io.netty.util.concurrent.Promise;

@ChannelHandler.Sharable
public final class SocksServerConnectHandler extends SimpleChannelInboundHandler {

    private final Bootstrap b = new Bootstrap();

    @Override
    public void channelRead0(final ChannelHandlerContext ctx, final SocksCmdRequest request) throws Exception {
        Promise promise = ctx.executor().newPromise();
        promise.addListener(
            new GenericFutureListener>() {
            @Override
            public void operationComplete(final Future future) throws Exception {
                final Channel outboundChannel = future.getNow();
                if (future.isSuccess()) {
                    ctx.channel().writeAndFlush(new SocksCmdResponse(SocksCmdStatus.SUCCESS, request.addressType()))
                            .addListener(new ChannelFutureListener() {
                                @Override
                                public void operationComplete(ChannelFuture channelFuture) {
                                    ctx.pipeline().remove(SocksServerConnectHandler.this);
                                    outboundChannel.pipeline().addLast(new RelayHandler(ctx.channel()));
                                    ctx.pipeline().addLast(new RelayHandler(outboundChannel));
                                }
                            });
                } else {
                    ctx.channel().writeAndFlush(new SocksCmdResponse(SocksCmdStatus.FAILURE, request.addressType()));
                    SocksServerUtils.closeOnFlush(ctx.channel());
                }
            }
        });

        final Channel inboundChannel = ctx.channel();
        b.group(inboundChannel.eventLoop())
                .channel(NioSocketChannel.class)
                .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 10000)
                .option(ChannelOption.SO_KEEPALIVE, true)
                .handler(new DirectClientHandler(promise));

        b.connect(request.host(), request.port()).addListener(new ChannelFutureListener() {
            @Override
            public void operationComplete(ChannelFuture future) throws Exception {
                if (future.isSuccess()) {
                    // Connection established use handler provided results
                } else {
                    // Close the connection if the connection attempt has failed.
                    ctx.channel().writeAndFlush(
                            new SocksCmdResponse(SocksCmdStatus.FAILURE, request.addressType()));
                    SocksServerUtils.closeOnFlush(ctx.channel());
                }
            }
        });
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        SocksServerUtils.closeOnFlush(ctx.channel());
    }
}