I'm new to jdo and GAE so I probably have some simple misunderstanding that
someone can quickly solve.
I have one servlet "A" that modifies an entity and another servlet "B" that
deletes the same entity. The problem is that when both are called at the
same time, the entity is being recreated after it was deleted.
What I mean is:
servlet A does
delme = pm.getObjectById( Thingy.class, sameKey );
Transaction tx = pm.currentTransaction();
try{
tx.begin();
pm.deletePersistent( delme );
tx.commit();
}
finally{
if( tx.isActive() ){
tx.rollback();
}
}
servlet B does
persistme = pm.getObjectById( Thingy.class, sameKey );
persistme.changeSomeValue();
Transaction tx = pm.currentTransaction();
try{
tx.begin();
pm.makePersistent( persistme );
tx.commit();
}
finally{
if( tx.isActive() ){
tx.rollback();
}
}
I would like servlet B to fail if the entity was deleted by Servlet A.
Instead, Servlet B just recreates the deleted entity. Anyone know what I
need to do here?
(the actual code is a little more complex than this eg the entity I am
modifying is actually a dependent child in an list of another entity)
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