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使用JAVA操作netty框架
使用JAVA操作netty框架
xiaoxiao
2021-12-14
16
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();
}
}
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