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netty java 调用
之前使用过MINA框架,感觉效率非常好,使用长连接可以支持10万次以上的并发。
今天尝试使用了Netty框架,感觉使用上也非常方便,具体效率问题,在接下来的博客会详细解读:
NioServerSocketChannelFactory创建服务端的ServerSocketChannel,采用多线程执行非阻塞IO,和Mina的设计
模式一样,都采用了Reactor模式。其中bossExecutor、workerExecutor是两个线程池,bossExecutor用来接收客户端连接,workerExecutor用来执行非阻塞的IO操作,主要是read,write。
Java代码
- package netty;
- import org.jboss.netty.bootstrap.ServerBootstrap;
- import org.jboss.netty.channel.ChannelFactory;
- import org.jboss.netty.channel.ChannelPipeline;
- import org.jboss.netty.channel.ChannelPipelineFactory;
- import org.jboss.netty.channel.Channels;
- import org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory;
- import org.jboss.netty.handler.codec.string.StringDecoder;
- import org.jboss.netty.handler.codec.string.StringEncoder;
- import java.net.InetSocketAddress;
- import java.util.concurrent.Executors;
- /**
- * Created by IntelliJ IDEA.
- * User: flychao88
- * Date: 12-6-6
- * Time: 上午10:14
- * To change this template use File | Settings | File Templates.
- */
- public class DiscardServer {
- public static void main(String[] args) throws Exception {
- ChannelFactory factory = new NioServerSocketChannelFactory(
- Executors.newCachedThreadPool(),
- Executors.newCachedThreadPool());
- ServerBootstrap bootstrap = new ServerBootstrap (factory);
- bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
- public ChannelPipeline getPipeline() {
- ChannelPipeline pipeline = Channels.pipeline();
- pipeline.addLast("encode",new StringEncoder());
- pipeline.addLast("decode",new StringDecoder());
- pipeline.addLast("handler",new DiscardServerHandler());
- return pipeline;
- }
- });
- bootstrap.setOption("child.tcpNoDelay", true);
- bootstrap.setOption("child.keepAlive", true);
- bootstrap.bind(new InetSocketAddress(8080));
- }
- }
Java代码
- package netty;
- import org.jboss.netty.buffer.ChannelBuffer;
- import org.jboss.netty.buffer.ChannelBuffers;
- import org.jboss.netty.channel.*;
- /**
- * Created by IntelliJ IDEA.
- * User: flychao88
- * Date: 12-6-6
- * Time: 上午10:10
- * To change this template use File | Settings | File Templates.
- */
- public class DiscardServerHandler extends SimpleChannelUpstreamHandler {
- @Override
- public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) {
- System.out.println("服务器接收1:"+e.getMessage());
- }
- @Override
- public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) {
- e.getCause().printStackTrace();
- Channel ch = e.getChannel();
- ch.close();
- }
- }
Java代码
- package netty;
- import org.jboss.netty.bootstrap.ClientBootstrap;
- import org.jboss.netty.channel.ChannelFactory;
- import org.jboss.netty.channel.ChannelPipeline;
- import org.jboss.netty.channel.ChannelPipelineFactory;
- import org.jboss.netty.channel.Channels;
- import org.jboss.netty.channel.socket.nio.NioClientSocketChannelFactory;
- import org.jboss.netty.handler.codec.string.StringDecoder;
- import org.jboss.netty.handler.codec.string.StringEncoder;
- import java.net.InetSocketAddress;
- import java.util.concurrent.Executors;
- /**
- * Created by IntelliJ IDEA.
- * User: flychao88
- * Date: 12-6-6
- * Time: 上午10:21
- * To change this template use File | Settings | File Templates.
- */
- public class TimeClient {
- public static void main(String[] args) throws Exception {
- ChannelFactory factory = new NioClientSocketChannelFactory(
- Executors.newCachedThreadPool(),
- Executors.newCachedThreadPool());
- ClientBootstrap bootstrap = new ClientBootstrap(factory);
- bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
- public ChannelPipeline getPipeline() {
- ChannelPipeline pipeline = Channels.pipeline();
- pipeline.addLast("encode",new StringEncoder());
- pipeline.addLast("decode",new StringDecoder());
- pipeline.addLast("handler",new TimeClientHandler());
- return pipeline;
- }
- });
- bootstrap.setOption("tcpNoDelay" , true);
- bootstrap.setOption("keepAlive", true);
- bootstrap.connect (new InetSocketAddress("127.0.0.1", 8080));
- }
- }
Java代码
- package netty;
- /**
- * Created by IntelliJ IDEA.
- * User: flychao88
- * Date: 12-6-6
- * Time: 上午10:22
- * To change this template use File | Settings | File Templates.
- */
- import org.jboss.netty.buffer.ChannelBuffer;
- import org.jboss.netty.buffer.ChannelBuffers;
- import org.jboss.netty.channel.*;
- import java.util.Date;
- public class TimeClientHandler extends SimpleChannelUpstreamHandler {
- @Override
- public void channelConnected(ChannelHandlerContext ctx, ChannelStateEvent e) {
- e.getChannel().write("abcd");
- }
- @Override
- public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) {
- e.getChannel().close();
- }
- @Override
- public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) {
- e.getCause().printStackTrace();
- e.getChannel().close();
- }
netty java 调用
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