Followed this Tutorial<https://developers.google.com/gdata/articles/eclipse>and
the issue is gone.
If anyone else has the same issue refer to that...
Τη Τετάρτη, 25 Ιουλίου 2012 4:17:00 μ.μ. UTC+3, ο χρήστης gg έγραψε:
>
> Hi guys.
>
> I am just starting to get a feel about Google Code and GWT.
>
> So my first thing to do was to download the Google Plugin for Eclipse and
> create a new Project.
>
> The project comes with an example, the greeting example. So i deployed
> that to App Engine and it worked great.
>
> Now I want to put some functionality in the example. So via eclipse, i
> d/led the Contacts API and automatically the jars were placed in the
> classpath and lib directory.
>
> So in the server side, in GreetingServiceImpl.java I added the following
> line
>
> ContactsService service = new ContactsServic("Contacts");
>
>
>
> So the file looks like this:
>
>
> package com.gnt.server;
>>
>> import com.gnt.client.GreetingService;
>> import com.gnt.shared.FieldVerifier;
>> import com.google.gdata.client.contacts.ContactsService;
>> import com.google.gwt.user.server.rpc.RemoteServiceServlet;
>>
>> /**
>> * The server side implementation of the RPC service.
>> */
>> @SuppressWarnings("serial")
>> public class GreetingServiceImpl extends RemoteServiceServlet implements
>> GreetingService {
>>
>> public String greetServer(String input) throws
>> IllegalArgumentException {
>> // Verify that the input is valid.
>> if (!FieldVerifier.isValidName(input)) {
>> // If the input is not valid, throw an
>> IllegalArgumentException back to
>> // the client.
>> throw new IllegalArgumentException(
>> "Name must be at least 4 characters long");
>> }
>>
>> String serverInfo = getServletContext().getServerInfo();
>> String userAgent =
>> getThreadLocalRequest().getHeader("User-Agent");
>>
>> // Escape data from the client to avoid cross-site script
>> vulnerabilities.
>> input = escapeHtml(input);
>> userAgent = escapeHtml(userAgent);
>> ContactsService contactsService = new ContactsService("Contacts");
>> return "Hello, " + input + "!<br><br>I am running " + serverInfo
>> + ".<br><br>It looks like you are using:<br>" + userAgent;
>> }
>>
>> /**
>> * Escape an html string. Escaping data received from the client
>> helps to
>> * prevent cross-site script vulnerabilities.
>> *
>> * @param html the html string to escape
>> * @return the escaped string
>> */
>> private String escapeHtml(String html) {
>> if (html == null) {
>> return null;
>> }
>> return html.replaceAll("&", "&").replaceAll("<", "<")
>> .replaceAll(">", ">");
>> }
>> }
>>
>>
> Now, the Remote Procedure Call fails and in the logs i only see
>
> javax.servlet.ServletContext log: Exception while dispatching incoming RPC
> call
>> com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public
>> abstract java.lang.String
>> com.gnt.client.GreetingService.greetServer(java.lang.String) throws
>> java.lang.IllegalArgumentException' threw an unexpected exception:
>> java.lang.NoClassDefFoundError: com/google/gdata/client/GoogleService
>> at
>> com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:385)
>> at
>> com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:588)
>> at
>> com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208)
>> at
>> com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248)
>> at
>> com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
>> 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:511)
>> at
>> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
>> at
>> com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:102)
>> at
>> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
>> at
>> com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:35)
>> 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
>> 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.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:249)
>> 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$RequestHandler.headerComplete(HttpConnection.java:923)
>> at
>> com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76)
>> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
>> at
>> com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:135)
>> at
>> com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:477)
>> at
>> com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:449)
>> at
>> com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:455)
>> at com.google.tracing.TraceContext.runInContext(TraceContext.java:695)
>> at
>> com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:333)
>> at
>> com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:325)
>> at
>> com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:453)
>> at
>> com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251)
>> at java.lang.Thread.run(Thread.java:679)
>> Caused by: java.lang.NoClassDefFoundError:
>> com/google/gdata/client/GoogleService
>> at
>> com.google.appengine.runtime.Request.process-ff033622b2cd8d3f(Request.java)
>> at java.lang.ClassLoader.defineClass1(Native Method)
>> at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
>> at
>> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
>> at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
>> at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>> at java.lang.reflect.Method.invoke(Method.java:616)
>> at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
>> at
>> com.gnt.server.GreetingServiceImpl.greetServer(GreetingServiceImpl.java:32)
>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>> at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>> at java.lang.reflect.Method.invoke(Method.java:43)
>> at
>> com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:569)
>> at
>> com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208)
>> at
>> com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248)
>> at
>> com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>> at
>> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
>> at
>> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
>> at
>> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
>> at
>> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
>> at
>> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
>> at
>> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
>> at
>> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>> at
>> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
>> at
>> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
>> at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
>> at
>> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>> at org.mortbay.jetty.Server.handle(Server.java:326)
>> at
>> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
>> at
>> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
>> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
>> at
>> com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:449)
>> at
>> com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:455)
>> at com.google.tracing.TraceContext.runInContext(TraceContext.java:695)
>> at
>> com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:333)
>> at
>> com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:325)
>> at
>> com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:453)
>> ... 1 more
>> Caused by: java.lang.ClassNotFoundException:
>> com.google.gdata.client.GoogleService
>> at
>> com.google.appengine.runtime.Request.process-ff033622b2cd8d3f(Request.java)
>> ... 34 more
>>
>>
>
>
> Can someone pls explain to me why this happens? All the necessary jars are
> in the classpath as well as in the lib directory...
>
> Why am i Getting this?
>
> Caused by: java.lang.NoClassDefFoundError:
> com/google/gdata/client/GoogleService
>
>
>
> Is there another way to get Contacts?
>
> Thank you and sorry for the big post!
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