Update in database in JDO using google app engine ..it didn't work?

One way to update an object with JDO is to fetch the object, then modify it while the PersistenceManager that returned the object is still open. Changes are persisted when the PersistenceManager is closed. For example.

By "didn't work" I'm assuming it didn't update your datastore as opposed to you got an error. If so, you need to begin and commit a JDO transaction if want to make updates to the datastore via this API.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.