Tcp Netty:在多个Netty客户之间共享NioClientSocketChannelFactory的正确方式是什么
我对内蒂不熟悉。我使用的是“Netty 3.6.2.最终版”。我创建了一个Netty客户端(MyClient),它与远程服务器(服务器实现了基于TCP的自定义协议)通信。我为每个MyClient实例(在构造函数中)创建一个新的ClientBootstrap实例。 我的问题是,如果我在MyClient的所有实例中共享“NioClientSocketChannelFactory”工厂对象,那么何时/如何释放与“NioClientSocketChannelFactory”关联的所有资源 换句话说,由于我的Netty客户端在一个全天候运行的JBOSS容器中运行,我应该通过调用“bootstrap.releaseExternalResources();”来释放所有资源吗?我应该在何时/何地这样做 更多信息:我的Netty客户端是从JBOSS容器中的两个场景调用的。首先,在无限for循环中,每次传递需要发送到远程服务器的字符串(实际上类似于下面的代码) 另一个场景是在并发线程中调用我的Netty客户端,每个线程都调用“new MyClient().handle(stringToSend);” 我在下面给出了基本代码。这与Netty网站上的TelnetClient示例非常相似 MyClientTcp Netty:在多个Netty客户之间共享NioClientSocketChannelFactory的正确方式是什么,tcp,netty,jboss5.x,sharing,Tcp,Netty,Jboss5.x,Sharing,我对内蒂不熟悉。我使用的是“Netty 3.6.2.最终版”。我创建了一个Netty客户端(MyClient),它与远程服务器(服务器实现了基于TCP的自定义协议)通信。我为每个MyClient实例(在构造函数中)创建一个新的ClientBootstrap实例。 我的问题是,如果我在MyClient的所有实例中共享“NioClientSocketChannelFactory”工厂对象,那么何时/如何释放与“NioClientSocketChannelFactory”关联的所有资源 换句话说,由于
import org.jboss.netty.bootstrap.ClientBootstrap;
import org.jboss.netty.channel.socket.nio.NioClientSocketChannelFactory;
public class MyClient {
//Instantiate this only once per application
private final static Timer timer = new HashedWheelTimer();
//All below must come from configuration
private final String host ="127.0.0.1";
private final int port =9699;
private final InetSocketAddress address = new InetSocketAddress(host, port);
private ClientBootstrap bootstrap;
//Timeout when the server sends nothing for n seconds.
static final int READ_TIMEOUT = 5;
public MyClient(){
bootstrap = new ClientBootstrap(NioClientSocketFactorySingleton.getInstance());
}
public String handle(String messageToSend){
bootstrap.setOption("connectTimeoutMillis", 20000);
bootstrap.setOption("tcpNoDelay", true);
bootstrap.setOption("keepAlive", true);
bootstrap.setOption("remoteAddress", address);
bootstrap.setPipelineFactory(new MyClientPipelineFactory(messageToSend,bootstrap,timer));
// Start the connection attempt.
ChannelFuture future = bootstrap.connect();
// Wait until the connection attempt succeeds or fails.
channel = future.awaitUninterruptibly().getChannel();
if (!future.isSuccess()) {
return null;
}
// Wait until the connection is closed or the connection attempt fails.
channel.getCloseFuture().awaitUninterruptibly();
MyClientHandler myClientHandler=(MyClientHandler)channel.getPipeline().getLast();
String messageReceived=myClientHandler.getMessageReceived();
return messageReceived;
}
}
Singleton NioClientSocketChannelFactory
public class NioClientSocketFactorySingleton {
private static NioClientSocketChannelFactory nioClientSocketChannelFactory;
private NioClientSocketFactorySingleton() {
}
public static synchronized NioClientSocketChannelFactory getInstance() {
if ( nioClientSocketChannelFactory == null) {
nioClientSocketChannelFactory=new NioClientSocketChannelFactory(
Executors.newCachedThreadPool(),
Executors.newCachedThreadPool());
}
return nioClientSocketChannelFactory;
}
protected void finalize() throws Throwable {
try{
if(nioClientSocketChannelFactory!=null){
// Shut down thread pools to exit.
nioClientSocketChannelFactory.releaseExternalResources();
}
}catch(Exception e){
//Can't do anything much
}
}
}
MyClientPipelineFactory
public class MyClientPipelineFactory implements ChannelPipelineFactory {
private String messageToSend;
private ClientBootstrap bootstrap;
private Timer timer;
public MyClientPipelineFactory(){
}
public MyClientPipelineFactory(String messageToSend){
this.messageToSend=messageToSend;
}
public MyClientPipelineFactory(String messageToSend,ClientBootstrap bootstrap, Timer timer){
this.messageToSend=messageToSend;
this.bootstrap=bootstrap;
this.timer=timer;
}
public ChannelPipeline getPipeline() throws Exception {
// Create a default pipeline implementation.
ChannelPipeline pipeline = pipeline();
// Add the text line codec combination first,
//pipeline.addLast("framer", new DelimiterBasedFrameDecoder(8192, Delimiters.lineDelimiter()));
pipeline.addLast("decoder", new StringDecoder());
pipeline.addLast("encoder", new StringEncoder());
//Add readtimeout
pipeline.addLast("timeout", new ReadTimeoutHandler(timer, MyClient.READ_TIMEOUT));
// and then business logic.
pipeline.addLast("handler", new MyClientHandler(messageToSend,bootstrap));
return pipeline;
}
}
public class MyClientHandler extends SimpleChannelUpstreamHandler {
private String messageToSend="";
private String messageReceived="";
public MyClientHandler(String messageToSend,ClientBootstrap bootstrap) {
this.messageToSend=messageToSend;
this.bootstrap=bootstrap;
}
@Override
public void channelConnected(ChannelHandlerContext ctx, ChannelStateEvent e){
e.getChannel().write(messageToSend);
}
@Override
public void messageReceived(ChannelHandlerContext ctx, MessageEvent e){
messageReceived=e.getMessage().toString();
//This take the control back to the MyClient
e.getChannel().close();
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) {
// Close the connection when an exception is raised.
e.getChannel().close();
}
}
MyClientHandler
public class MyClientPipelineFactory implements ChannelPipelineFactory {
private String messageToSend;
private ClientBootstrap bootstrap;
private Timer timer;
public MyClientPipelineFactory(){
}
public MyClientPipelineFactory(String messageToSend){
this.messageToSend=messageToSend;
}
public MyClientPipelineFactory(String messageToSend,ClientBootstrap bootstrap, Timer timer){
this.messageToSend=messageToSend;
this.bootstrap=bootstrap;
this.timer=timer;
}
public ChannelPipeline getPipeline() throws Exception {
// Create a default pipeline implementation.
ChannelPipeline pipeline = pipeline();
// Add the text line codec combination first,
//pipeline.addLast("framer", new DelimiterBasedFrameDecoder(8192, Delimiters.lineDelimiter()));
pipeline.addLast("decoder", new StringDecoder());
pipeline.addLast("encoder", new StringEncoder());
//Add readtimeout
pipeline.addLast("timeout", new ReadTimeoutHandler(timer, MyClient.READ_TIMEOUT));
// and then business logic.
pipeline.addLast("handler", new MyClientHandler(messageToSend,bootstrap));
return pipeline;
}
}
public class MyClientHandler extends SimpleChannelUpstreamHandler {
private String messageToSend="";
private String messageReceived="";
public MyClientHandler(String messageToSend,ClientBootstrap bootstrap) {
this.messageToSend=messageToSend;
this.bootstrap=bootstrap;
}
@Override
public void channelConnected(ChannelHandlerContext ctx, ChannelStateEvent e){
e.getChannel().write(messageToSend);
}
@Override
public void messageReceived(ChannelHandlerContext ctx, MessageEvent e){
messageReceived=e.getMessage().toString();
//This take the control back to the MyClient
e.getChannel().close();
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) {
// Close the connection when an exception is raised.
e.getChannel().close();
}
}
只有在确定不再需要releaseExternalResources()时,才应该调用它。例如,当应用程序停止或取消部署时,可能会出现这种情况