Hi,
This is the first time that I have worked with Datastore, I followed
the tutorial here
http://code.google.com/appengine/docs/java/datastore/usingjdo.html,
but whenever I run the project I got this error:
org.datanucleus.jdo.exceptions.ClassNotPersistenceCapableException:
The class "The class "my class" 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.
Error on MailHandler
at
org.datanucleus.jdo.NucleusJDOHelper.getJDOExceptionForNucleusException(NucleusJDOHelper.java:
241)
at
org.datanucleus.jdo.JDOPersistenceManager.jdoMakePersistent(JDOPersistenceManager.java:
674)
at
org.datanucleus.jdo.JDOPersistenceManager.makePersistent(JDOPersistenceManager.java:
694)
at com.waveassistant.app.MailHandler.doPost(MailHandler.java:82)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
...........................
Also, I tried to clean/build the project, just maybe there is a
problem on the logs. So I got this error also:
java.lang.RuntimeException: Unexpected exception
at com.google.appengine.tools.enhancer.Enhancer.execute(Enhancer.java:
59)
at com.google.appengine.tools.enhancer.Enhance.<init>(Enhance.java:
60)
at com.google.appengine.tools.enhancer.Enhance.main(Enhance.java:41)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.appengine.tools.enhancer.Enhancer.execute(Enhancer.java:
57)
... 2 more
Caused by: org.datanucleus.exceptions.NucleusException: Plugin
(Bundle) "org.datanucleus.store.appengine" is already registered.
Ensure you dont have multiple JAR versions of the same plugin in the
classpath. The URL "file:/D:/MasteringWave/Eclipse/WaveAssistant/war/
WEB-INF/lib/datanucleus-appengine-1.0.6.final.jar" is already
registered, and you are trying to register an identical plugin located
at URL "file:/C:/eclipse/plugins/
com.google.appengine.eclipse.sdkbundle.1.3.3_1.3.3.v201004231111/
appengine-java-sdk-1.3.3.1/lib/user/orm/datanucleus-
appengine-1.0.6.final.jar."
at
org.datanucleus.plugin.NonManagedPluginRegistry.registerBundle(NonManagedPluginRegistry.java:
434)
at
org.datanucleus.plugin.NonManagedPluginRegistry.registerBundle(NonManagedPluginRegistry.java:
340)
at
org.datanucleus.plugin.NonManagedPluginRegistry.registerExtensions(NonManagedPluginRegistry.java:
222)
at
org.datanucleus.plugin.NonManagedPluginRegistry.registerExtensionPoints(NonManagedPluginRegistry.java:
153)
at
org.datanucleus.plugin.PluginManager.registerExtensionPoints(PluginManager.java:
82)
at org.datanucleus.OMFContext.<init>(OMFContext.java:160)
at
org.datanucleus.enhancer.DataNucleusEnhancer.<init>(DataNucleusEnhancer.java:
172)
at
org.datanucleus.enhancer.DataNucleusEnhancer.<init>(DataNucleusEnhancer.java:
150)
at
org.datanucleus.enhancer.DataNucleusEnhancer.main(DataNucleusEnhancer.java:
1157)
... 7 more
Please Advise.
Thanks in advance,
Paul
--
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 google-appengine-j...@googlegroups.com.
To unsubscribe from this group, send email to
google-appengine-java+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/google-appengine-java?hl=en.
