Erreur lors d'un appel RPC en utilisant gwt-sl
salut
je voudrait intégrer la bibliothèque GWT-sl(gwt 2.0.0 et GWT-sl 1.1)
j'ai debuter avec un simple exemple mais j'ai l'erreur suivante (en mode developpement)
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[WARN] Exception while dispatching incoming RPC call
java.lang.RuntimeException: com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract java.lang.String gwt.spring.serverlibrary.client.GreetingService.greetServer(java.lang.String)' threw an unexpected exception: java.lang.NullPointerException
at org.gwtwidgets.server.spring.GWTRPCServiceExporter.handleExporterProcessingException(GWTRPCServiceExporter.java:384)
at org.gwtwidgets.server.spring.GWTRPCServiceExporter.processCall(GWTRPCServiceExporter.java:353)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:224)
at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
at org.gwtwidgets.server.spring.GWTRPCServiceExporter.handleRequest(GWTRPCServiceExporter.java:407)
at org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter.handle(HttpRequestHandlerAdapter.java:49)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:771)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:716)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:647)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:563)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
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$RequestHandler.content(HttpConnection.java:843)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
Caused by: com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract java.lang.String gwt.spring.serverlibrary.client.GreetingService.greetServer(java.lang.String)' threw an unexpected exception: java.lang.NullPointerException
at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:378)
at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:361)
at org.gwtwidgets.server.spring.GWTRPCServiceExporter.encodeResponseForFailure(GWTRPCServiceExporter.java:223)
at org.gwtwidgets.server.spring.GWTRPCServiceExporter.handleInvocationTargetException(GWTRPCServiceExporter.java:256)
at org.gwtwidgets.server.spring.GWTRPCServiceExporter.processCall(GWTRPCServiceExporter.java:344)
... 27 more
Caused by: java.lang.NullPointerException
at javax.servlet.GenericServlet.getServletContext(GenericServlet.java:160)
at gwt.spring.serverlibrary.server.GreetingServiceImpl.greetServer(GreetingServiceImpl.java:15)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.gwtwidgets.server.spring.GWTRPCServiceExporter.invokeMethodOnService(GWTRPCServiceExporter.java:169)
at org.gwtwidgets.server.spring.GWTRPCServiceExporter.processCall(GWTRPCServiceExporter.java:338)
... 27 more
[ERROR] 500 - POST /activities/services/activityService (127.0.0.1) 57 bytes
Request headers
Host: localhost:8888
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; fr; rv:1.9.1.8) Gecko/20100202 Firefox/3.5.8
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Referer: http://localhost:8888/activities/hosted.html?activities
X-GWT-Permutation: HostedMode
X-GWT-Module-Base: http://localhost:8888/activities/
Content-Type: text/x-gwt-rpc; charset=utf-8
Content-Length: 180
Pragma: no-cache
Cache-Control: no-cache
Response headers
Content-Type: text/plain |
l'erreur provient de la ligne suivante:
Code:
String serverInfo = getServletContext().getServerInfo();
en supprimant cette ligne , ça marche bien.
Une autre chose, avant d'intégrer GWT-sl, cette ligne fonctionne correctement!
d'autre part, le mode web ne fonctionne jamais; j'ai toujours ce message:
Code:
Etat HTTP 404 - Servlet activities n'est pas disponible.
