netty future

[ligengyong2010]

本人新编写了一个netty的hello程序，代码如下：
public class HelloWorldServer {
public static void main(String[]args){
// Server服务启动器
ServerBootstrap bootstrap =
new ServerBootstrap(
new NioServerSocketChannelFactory(
Executors.newCachedThreadPool(),
Executors.newCachedThreadPool())
);
bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
public ChannelPipeline getPipeline() {
ChannelPipeline pipeline = Channels.pipeline();
pipeline.addLast("decoder", new StringDecoder());
pipeline.addLast("encoder", new StringEncoder());
pipeline.addLast("handler", new HelloWorldServerHandler());
return pipeline;
}
});
bootstrap.bind(new InetSocketAddress(8088));
}
}

public class HelloWorldServerHandler extends SimpleChannelHandler{
public void channelConnected(ChannelHandlerContext ctx,ChannelStateEvent e)
throws Exception {
e.getChannel().write("Hello, World");
}
public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) {
System.out.println("Unexpected exception from downstream." + e.getCause());
e.getChannel().close();
}
}

public class HelloWorldClient {
public static void main(String []args){
ClientBootstrap bootstrap = new ClientBootstrap(
new NioClientSocketChannelFactory(
Executors.newCachedThreadPool(),
Executors.newCachedThreadPool())
);
bootstrap.setPipelineFactory(
new ChannelPipelineFactory(){
public ChannelPipeline getPipeline() {
ChannelPipeline pipeline = Channels.pipeline();
pipeline.addLast("decoder", new StringDecoder());
pipeline.addLast("encoder", new StringEncoder());
pipeline.addLast("handler", new HelloWorldClientHandler());
return pipeline;
}
}
);
ChannelFuture future = bootstrap.connect(new InetSocketAddress("localhost", 8088));
future.getChannel().getCloseFuture().awaitUninterruptibly();
bootstrap.releaseExternalResources();
}

}

public class HelloWorldClientHandler extends SimpleChannelHandler {
public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) {
String message = (String) e.getMessage();
System.out.println(message);
e.getChannel().close();
}
public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) {
System.out.println("Unexpected exception from downstream." + e.getCause());
e.getChannel().close();
}
}
在例子中ChannelFuture和java本身的Future有什么区别呀，另外可否有高手简单介绍一下nio netty和mina的区别，nio需要注册读和写事件，mina也是时间过滤的 netty采用什么机理呢