code.google.nfs.rpc.netty.client.NettyClientFactory.java Source code

Introduction

Here is the source code for code.google.nfs.rpc.netty.client.NettyClientFactory.java

Source

package code.google.nfs.rpc.netty.client;

/**
 * nfs-rpc
 *   Apache License
 *   
 *   http://code.google.com/p/nfs-rpc (c) 2011
 */
import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.PooledByteBufAllocator;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;

import java.net.InetSocketAddress;
import java.util.concurrent.ThreadFactory;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import code.google.nfs.rpc.NamedThreadFactory;
import code.google.nfs.rpc.client.AbstractClientFactory;
import code.google.nfs.rpc.client.Client;
import code.google.nfs.rpc.netty.serialize.NettyProtocolDecoder;
import code.google.nfs.rpc.netty.serialize.NettyProtocolEncoder;

/**
 * Netty Client Factory,to create client based on netty API
 * 
 * @author <a href="mailto:bluedavy@gmail.com">bluedavy</a>
 */
public class NettyClientFactory extends AbstractClientFactory {

    private static final Log LOGGER = LogFactory.getLog(NettyClientFactory.class);

    private static final int PROCESSORS = Runtime.getRuntime().availableProcessors();

    private static AbstractClientFactory _self = new NettyClientFactory();

    private static final ThreadFactory workerThreadFactory = new NamedThreadFactory("NETTYCLIENT-WORKER-");

    private static EventLoopGroup workerGroup = new NioEventLoopGroup(PROCESSORS, workerThreadFactory);

    private NettyClientFactory() {
        ;
    }

    public static AbstractClientFactory getInstance() {
        return _self;
    }

    protected Client createClient(String targetIP, int targetPort, int connectTimeout, String key)
            throws Exception {
        Bootstrap bootstrap = new Bootstrap();
        bootstrap.group(workerGroup).channel(NioSocketChannel.class)
                .option(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT)
                .option(ChannelOption.TCP_NODELAY,
                        Boolean.parseBoolean(System.getProperty("nfs.rpc.tcp.nodelay", "true")))
                .option(ChannelOption.SO_REUSEADDR,
                        Boolean.parseBoolean(System.getProperty("nfs.rpc.tcp.reuseaddress", "true")));
        if (connectTimeout < 1000) {
            bootstrap.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 1000);
        } else {
            bootstrap.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, connectTimeout);
        }
        final NettyClientHandler handler = new NettyClientHandler(this, key);
        bootstrap.handler(new ChannelInitializer<SocketChannel>() {

            protected void initChannel(SocketChannel channel) throws Exception {
                ChannelPipeline pipeline = channel.pipeline();
                pipeline.addLast("decoder", new NettyProtocolDecoder());
                pipeline.addLast("encoder", new NettyProtocolEncoder());
                pipeline.addLast("handler", handler);
            }

        });
        ChannelFuture future = bootstrap.connect(new InetSocketAddress(targetIP, targetPort)).sync();
        future.awaitUninterruptibly(connectTimeout);
        if (!future.isDone()) {
            LOGGER.error("Create connection to " + targetIP + ":" + targetPort + " timeout!");
            throw new Exception("Create connection to " + targetIP + ":" + targetPort + " timeout!");
        }
        if (future.isCancelled()) {
            LOGGER.error("Create connection to " + targetIP + ":" + targetPort + " cancelled by user!");
            throw new Exception("Create connection to " + targetIP + ":" + targetPort + " cancelled by user!");
        }
        if (!future.isSuccess()) {
            LOGGER.error("Create connection to " + targetIP + ":" + targetPort + " error", future.cause());
            throw new Exception("Create connection to " + targetIP + ":" + targetPort + " error", future.cause());
        }
        NettyClient client = new NettyClient(future, key, connectTimeout);
        handler.setClient(client);
        return client;
    }

}