问题描述
我已经使用 javax websockets 构建了一个客户端服务器应用程序。尽管JSR 356没有停止websocket容器的方法,但我设法在将其投射到 jetty Lifecyle 之后停止了该容器em>。一旦停止我写的容器
system.exit(1);
但是从客户端程序返回的代码始终为零。
代码: @ClientEndpoint
public boolean close()
{
try
{
if(this.container != null && this.container instanceof LifeCycle) {
logger.trace("stoping container...");
((LifeCycle) this.container).stop();
}
this.session.close();
return true;
}
catch (Exception e)
{
logger.trace("Exception occured while closing the connection",e);
return false;
}
}
code:从另一个类调用close方法
public closeConnection(){
this.wc.close();
System.exit(1);
}
感谢您的帮助:-)
解决方法
您是要尝试从属于容器的线程还是容器的ThreadPool / Executor调用closeConnection
或close
?
此外,一旦容器停止,所有会话也将停止。
将@ClientEndpoint
close()
更改为...
public void close()
{
try
{
this.session.close();
}
catch (Exception e)
{
logger.trace("Exception occured while closing the connection",e);
}
}
然后简单地使closeConnection()
...
public closeConnection()
{
LifeCycle.stop(this.wc.getContainer());
System.exit(1);
}
可以在
找到一个可行的例子
https://github.com/joakime/javaxwebsocket-client-returncode
其中有代码...
App.java
package org.eclipse.jetty.demo;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import javax.websocket.ClientEndpointConfig;
import javax.websocket.ContainerProvider;
import javax.websocket.DeploymentException;
import javax.websocket.WebSocketContainer;
import org.eclipse.jetty.util.component.LifeCycle;
public class App
{
private static final App MAIN_INSTANCE = new App();
private WebSocketContainer client;
public static void main(String[] args) throws IOException,DeploymentException,URISyntaxException
{
App.MAIN_INSTANCE.connect();
}
public static void stop(int returnCode)
{
// Trigger stop from thread that does not belong to Container.
new Thread(() ->
{
LifeCycle.stop(App.MAIN_INSTANCE.client);
System.exit(returnCode);
}).start();
}
private WebSocketContainer getClientContainer()
{
if (client == null)
client = ContainerProvider.getWebSocketContainer();
return client;
}
public void connect() throws IOException,URISyntaxException
{
URI echoUri = URI.create("wss://echo.websocket.org");
ClientEndpointConfig clientEndpointConfig = ClientEndpointConfig.Builder.create()
.configurator(new OriginServerConfigurator(echoUri))
.build();
EchoEndpoint echoEndpoint = new EchoEndpoint();
getClientContainer().connectToServer(echoEndpoint,clientEndpointConfig,echoUri);
System.out.printf("Connected to : %s%n",echoUri);
}
}
EchoEndpoint.java
package org.eclipse.jetty.demo;
import javax.websocket.CloseReason;
import javax.websocket.Endpoint;
import javax.websocket.EndpointConfig;
import javax.websocket.MessageHandler;
import javax.websocket.Session;
/**
* Basic Echo Client Endpoint
*/
public class EchoEndpoint extends Endpoint implements MessageHandler.Whole<String>
{
private Session session;
@Override
public void onClose(Session session,CloseReason closeReason)
{
System.out.printf("Connection closed: Session.id=%s - %s%n",session.getId(),closeReason);
this.session = null;
}
@Override
public void onOpen(Session session,EndpointConfig config)
{
System.out.printf("Got open: Session.id=%s%n",session.getId());
this.session = session;
this.session.addMessageHandler(this);
try
{
session.getBasicRemote().sendText("Hello");
session.getBasicRemote().sendText("How are things?");
session.getBasicRemote().sendText("Thanks for the conversation.");
}
catch (Throwable t)
{
t.printStackTrace();
}
}
@Override
public void onMessage(String msg)
{
System.out.printf("Got msg: \"%s\"%n",msg);
if (msg.contains("Thanks"))
{
App.stop(1);
}
}
@Override
public void onError(Session session,Throwable cause)
{
cause.printStackTrace();
}
}