hi.every one .I use example with google's for jdo Persistence.but I run it has below errors. what's happend for it? what can I do? thanks.
2009-5-2 9:41:15 com.google.appengine.tools.development.ApiProxyLocalImpl log SEVERE: [1241228475187000] 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.arpenker.gxt.client.GreetingService.greetServer(java.lang.String)' threw an unexpected exception: org.datanucleus.jdo.exceptions.ClassNotPersistenceCapableException: The class "The class "com.arpenker.gxt.client.dto.Greeting" is not persistable. This means that it either hasnt been enhanced, or that the enhanced version of the file is not in the CLASSPATH (or is hidden by an unenhanced version), or the Meta-Data/annotations for the class are not found." is not persistable. This means that it either hasnt been enhanced, or that the enhanced version of the file is not in the CLASSPATH (or is hidden by an unenhanced version), or the Meta-Data for the class is not found. NestedThrowables: org.datanucleus.exceptions.ClassNotPersistableException: The class "com.arpenker.gxt.client.dto.Greeting" is not persistable. This means that it either hasnt been enhanced, or that the enhanced version of the file is not in the CLASSPATH (or is hidden by an unenhanced version), or the Meta-Data/annotations for the class are not found. at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure (RPC.java:360) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse (RPC.java:546) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall (RemoteServiceServlet.java:166) at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost (RemoteServiceServlet.java:86) 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: 487) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter (ServletHandler.java:1093) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter (TransactionCleanupFilter.java:43) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter (ServletHandler.java:1084) at org.mortbay.jetty.servlet.ServletHandler.handle (ServletHandler.java:360) 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:712) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java: 405) at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle (DevAppEngineWebAppContext.java:54) at org.mortbay.jetty.handler.HandlerWrapper.handle (HandlerWrapper.java:139) at com.google.appengine.tools.development.JettyContainerService $ApiProxyHandler.handle(JettyContainerService.java:306) at org.mortbay.jetty.handler.HandlerWrapper.handle (HandlerWrapper.java:139) at org.mortbay.jetty.Server.handle(Server.java:313) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java: 506) at org.mortbay.jetty.HttpConnection$RequestHandler.content (HttpConnection.java:844) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:644) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:205) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381) at org.mortbay.io.nio.SelectChannelEndPoint.run (SelectChannelEndPoint.java:396) at org.mortbay.thread.BoundedThreadPool$PoolThread.run (BoundedThreadPool.java:442) Caused by: org.datanucleus.jdo.exceptions.ClassNotPersistenceCapableException: The class "The class "com.arpenker.gxt.client.dto.Greeting" is not persistable. This means that it either hasnt been enhanced, or that the enhanced version of the file is not in the CLASSPATH (or is hidden by an unenhanced version), or the Meta-Data/annotations for the class are not found." is not persistable. This means that it either hasnt been enhanced, or that the enhanced version of the file is not in the CLASSPATH (or is hidden by an unenhanced version), or the Meta-Data for the class is not found. NestedThrowables: org.datanucleus.exceptions.ClassNotPersistableException: The class "com.arpenker.gxt.client.dto.Greeting" is not persistable. This means that it either hasnt been enhanced, or that the enhanced version of the file is not in the CLASSPATH (or is hidden by an unenhanced version), or the Meta-Data/annotations for the class are not found. at org.datanucleus.jdo.NucleusJDOHelper.getJDOExceptionForNucleusException (NucleusJDOHelper.java:305) at org.datanucleus.jdo.JDOPersistenceManager.jdoMakePersistent (JDOPersistenceManager.java:673) at org.datanucleus.jdo.JDOPersistenceManager.makePersistent (JDOPersistenceManager.java:693) at com.arpenker.gxt.server.action.login.GreetingServiceAction.greetServer (GreetingServiceAction.java:49) 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:623) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse (RPC.java:527) ... 25 more Caused by: org.datanucleus.exceptions.ClassNotPersistableException: The class "com.arpenker.gxt.client.dto.Greeting" is not persistable. This means that it either hasnt been enhanced, or that the enhanced version of the file is not in the CLASSPATH (or is hidden by an unenhanced version), or the Meta-Data/annotations for the class are not found. at org.datanucleus.ObjectManagerImpl.assertClassPersistable (ObjectManagerImpl.java:3830) at org.datanucleus.ObjectManagerImpl.persistObjectInternal (ObjectManagerImpl.java:1200) at org.datanucleus.ObjectManagerImpl.persistObject (ObjectManagerImpl.java:1135) at org.datanucleus.jdo.JDOPersistenceManager.jdoMakePersistent (JDOPersistenceManager.java:668) ... 32 more --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. 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