Hi,
I am getting the below exception even when I have the entity with Id 4 for
the kind X.
Could not retrieve entity of kind X with key X("X(4)")
org.datanucleus.exceptions.NucleusObjectNotFoundException: Could not
retrieve entity of kind X with key X("X(4)")
at
com.google.appengine.datanucleus.DatastoreExceptionTranslator.wrapEntityNotFoundException(DatastoreExceptionTranslator.java:61)
at
com.google.appengine.datanucleus.EntityUtils.getEntityFromDatastore(EntityUtils.java:670)
at
com.google.appengine.datanucleus.DatastorePersistenceHandler.fetchObject(DatastorePersistenceHandler.java:543)
at
org.datanucleus.state.JDOStateManager.loadFieldsFromDatastore(JDOStateManager.java:1638)
at org.datanucleus.state.JDOStateManager.validate(JDOStateManager.java:3511)
at org.datanucleus.ObjectManagerImpl.findObject(ObjectManagerImpl.java:3379)
at
org.datanucleus.api.jdo.JDOPersistenceManager.getObjectById(JDOPersistenceManager.java:1722)
at
org.datanucleus.api.jdo.JDOPersistenceManager.getObjectById(JDOPersistenceManager.java:1740)
...................
Below is the structure of Kind X,
@PersistenceCapable
class X {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key xId;
// getter setter for xId and other attributes
}
I am trying to retrieve this using below code,
getX(String id){
PersistenceManager pm = PMF.get().getPersistenceManager();
...
Key k = KeyFactory.createKey(X.class.getSimpleName(), id);
X x = pm.getObjectById(X.class, k);
//X x = pm.getObjectById(X.class, id); // Even this does not work
return x;
...
}
I am sure I am doing some silly and basic mistake here. Can someone out
here figure out as to what am I doing wrong over here ?
Thanks !
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