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
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