Hi drthink , The class 'com/google/gdata/client/ authn/oauth/GoogleOAuthParameters ' causing the exception is contained in gdata-core-1.0.jar jar file. Make sure the jar is on your classpath.
Thanks On Jun 9, 3:01 am, drthink <[email protected]> wrote: > I am building a GWT-GAE-Java application that imports Google Contacts > using the GData Java Client library. I am following this example > here: http://code.google.com/apis/gdata/docs/auth/oauth.html > > I am attempting the first stage of this demo where I create a URL the > user gets redirected to to authenticate my application to extract > contact data. > > The problem is I can't get it to work. My code is running on the > server section of the GWT application, and it fails on the first line > where the GoogleOAuthParameters is initialized with a > "NoClassDefFoundError". > > I have tried changing this every which way and I am pulling my > proverbial hair out. > > I recognize that there is a GWT-Client library for managing this > process from the client side of GWT, but I don't want to use that as > it doesn't use oAuth. > > Any ideas? > > Cheers > Gene > > **** CODE > GoogleOAuthParameters oauthParameters = new GoogleOAuthParameters(); > oauthParameters.setOAuthConsumerKey(CONSUMER_KEY); > oauthParameters.setOAuthConsumerSecret(CONSUMER_SECRET); > oauthParameters.setScope("https://docs.google.com/feeds/";); > oauthParameters.setOAuthCallback("http://www.example.com/ > UpgradeToken.jsp"); > > GoogleOAuthHelper oauthHelper = new GoogleOAuthHelper(new > OAuthHmacSha1Signer()); > oauthHelper.getUnauthorizedRequestToken(oauthParameters); > > String approvalPageUrl = > oauthHelper.createUserAuthorizationUrl(oauthParameters); > System.out.println(approvalPageUrl); > > *****ERROR > Jun 8, 2010 2:56:52 PM > com.google.appengine.tools.development.ApiProxyLocalImpl log > SEVERE: [1276034212868000] javax.servlet.ServletContext log: Exception > while dispatching incoming RPC call > com.google.gwt.user.server.rpc.UnexpectedException: Service method > 'public abstract com.sohoappspot.scheduler.shared.UserInfo > com.sohoappspot.scheduler.client.rpc.GreetingService.getUserInformation() > throws java.lang.IllegalArgumentException' threw an unexpected > exception: java.lang.NoClassDefFoundError: com/google/gdata/client/ > authn/oauth/GoogleOAuthParameters > at > com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java: > 378) > at > com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java: > 581) > 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.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: java.lang.NoClassDefFoundError: com/google/gdata/client/ > authn/oauth/GoogleOAuthParameters > at > com.sohoappspot.scheduler.server.GreetingServiceImpl.getContactsAuthSubLogin(GreetingServiceImpl.java: > 96) > at > com.sohoappspot.scheduler.server.GreetingServiceImpl.getUserInformation(GreetingServiceImpl.java: > 78) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java: > 57) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java: > 43) > at java.lang.reflect.Method.invoke(Method.java:616) > 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) > ... 30 more -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. 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