Yes, this feature isn't launched in the production server yet. You can try it out in the 1.3.5 DevAppServer, but it requires a slightly workaround:
Extract the "apphosting/tools/dev-channel-js.js" file from appengine-api-1.0-sdk-1.3.5.jar and move it to /_ah/channel/jsapi in your war directory (as if it were a static file). Your HTML should then use <script src="/_ah/channel/jsapi">. You should not reference http://talkgadget.google.com/talkgadget/channel.js directly. That path will never work in the DevAppServer. The dance-dance-robot sample will be updated when 1.3.6 is launched and this works in the DevAppServer without the above workaround. On Mon, Jul 19, 2010 at 10:13 PM, GoSharp Lite <[email protected]>wrote: > I have the same error using dev server. > > If you deploy your app to production server, below error log shows > channel service is not enable. > > exception: com.google.apphosting.api.ApiProxy > $FeatureNotEnabledException: The channel service is not enabled. > > It seems we have to patiently wait:) > > On Jul 20, 10:36 am, Daniel Guermeur <[email protected]> wrote: > > Thanks for the tip about channel.js. This is what I needed. > > > > Now I get an error when pushing a message to a client. I get this: > > > > com.google.appengine.api.channel.ChannelFailureException: An > > unexpected error occurred. > > Caused by: com.google.apphosting.api.ApiProxy$ApplicationException: > > ApplicationError: 2: > > > > Here is the stack trace. Let me know of any ideas you might have. > > > > Thanks! > > Daniel > > > > SEVERE: Failed to push the message > > com.metadot.book.stalkrapp.shared.mess...@1010a3b to client channel- > > [email protected] > > com.google.appengine.api.channel.ChannelFailureException: An > > unexpected error occurred. > > at > > > com.google.appengine.api.channel.ChannelServiceImpl.sendMessage(ChannelServiceImpl.java: > > 59) > > at > > > com.metadot.book.stalkrapp.server.PushServer.sendMessageToOneUser(PushServer.java: > > 82) > > at > > > com.metadot.book.stalkrapp.server.FriendsServiceImpl.getFriend(FriendsServiceImpl.java: > > 283) > > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > > at > > > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java: > > 39) > > at > > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java: > > 25) > > at java.lang.reflect.Method.invoke(Method.java:597) > > at > > > com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java: > > 100) > > at > > com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java: > > 562) > > at > > > com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java: > > 188) > > 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 javax.servlet.http.HttpServlet.service(HttpServlet.java:713) > > at javax.servlet.http.HttpServlet.service(HttpServlet.java:806) > > at > org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java: > > 511) > > at org.mortbay.jetty.servlet.ServletHandler > > $CachedChain.doFilter(ServletHandler.java:1166) > > at > > > com.metadot.book.stalkrapp.server.servlets.LoginFilter.doFilter(LoginFilter.java: > > 31) > > at org.mortbay.jetty.servlet.ServletHandler > > $CachedChain.doFilter(ServletHandler.java:1157) > > at > > > com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java: > > 51) > > at org.mortbay.jetty.servlet.ServletHandler > > $CachedChain.doFilter(ServletHandler.java:1157) > > at > > > com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java: > > 43) > > at org.mortbay.jetty.servlet.ServletHandler > > $CachedChain.doFilter(ServletHandler.java:1157) > > at > > > com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java: > > 122) > > at org.mortbay.jetty.servlet.ServletHandler > > $CachedChain.doFilter(ServletHandler.java:1157) > > at > > org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java: > > 388) > > at > > org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java: > > 216) > > at > > org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java: > > 182) > > at > > org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java: > > 765) > > at > org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java: > > 418) > > at > > > com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java: > > 70) > > at > > org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java: > > 152) > > at com.google.appengine.tools.development.JettyContainerService > > $ApiProxyHandler.handle(JettyContainerService.java:349) > > at > > org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java: > > 152) > > at org.mortbay.jetty.Server.handle(Server.java:326) > > at > org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java: > > 542) > > at org.mortbay.jetty.HttpConnection > > $RequestHandler.content(HttpConnection.java:938) > > at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755) > > at > org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218) > > at > org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) > > at > > org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java: > > 409) > > at org.mortbay.thread.QueuedThreadPool > > $PoolThread.run(QueuedThreadPool.java:582) > > Caused by: com.google.apphosting.api.ApiProxy$ApplicationException: > > ApplicationError: 2: > > at > > > com.google.appengine.api.channel.dev.LocalChannelService.sendChannelMessage(LocalChannelService.java: > > 91) > > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > > at > > > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java: > > 39) > > at > > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java: > > 25) > > at java.lang.reflect.Method.invoke(Method.java:597) > > at com.google.appengine.tools.development.ApiProxyLocalImpl > > $AsyncApiCall.call(ApiProxyLocalImpl.java:305) > > at com.google.appengine.tools.development.ApiProxyLocalImpl > > $AsyncApiCall.call(ApiProxyLocalImpl.java:262) > > at java.util.concurrent.Executors$PrivilegedCallable > > $1.run(Executors.java:463) > > at java.security.AccessController.doPrivileged(Native Method) > > at java.util.concurrent.Executors > > $PrivilegedCallable.call(Executors.java:460) > > at > java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) > > at java.util.concurrent.FutureTask.run(FutureTask.java:138) > > at java.util.concurrent.ThreadPoolExecutor > > $Worker.runTask(ThreadPoolExecutor.java:886) > > at java.util.concurrent.ThreadPoolExecutor > > $Worker.run(ThreadPoolExecutor.java:908) > > at java.lang.Thread.run(Thread.java:637) > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine for Java" group. > To post to this group, send email to > [email protected]. > To unsubscribe from this group, send email to > [email protected]<google-appengine-java%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/google-appengine-java?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. 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