Use Websockets in GWT's DevMode

Question

has anyone an idea, how to run my app in DevMode with a working WebsocketConnection? First I thought the missing jetty jars (websocket, continuation, http, io, server and util) were the reason for errors, because when i compiled the app and put it on an external jetty, there was no problem with WebsocketConnection. So i searched for them and added them to my project. But now everytime i start it in DevMode i get an exceptionlike this:

[WARN] /testchat/WebSocketChatServlet
java.lang.NullPointerException
at org.eclipse.jetty.websocket.WebSocketFactory.upgrade(WebSocketFactory.java:197)
at org.eclipse.jetty.websocket.WebSocketFactory.acceptWebSocket(WebSocketFactory.java:304)
at org.eclipse.jetty.websocket.WebSocketServlet.service(WebSocketServlet.java:78)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:829)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:513)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)

[ERROR] 500 - GET /testchat/WebSocketChatServlet (127.0.0.1) 3129 bytes

Answer 1

The Jetty team is only too happy to help Google port GWT to jetty-7. We have actually contacted them several times about it over the space of a couple of years, including sending along code, however we've never had a response from them. So Google, if you're listening, we're here to help :)

Jan