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JDO Doc
9

javax.jdo.PersistenceManagerFactory

addFetchGroups( FetchGroup... groups) Add the FetchGroups to the set of active fetch groups. Add the FetchGroups to the set of active fetch groups. FetchGroups are made unmodifiable before being added ... to see that all PersistenceManager instances obtained from this PersistenceManagerFactory have no active
JPA Doc
8

JPA Exceptions

, an attempt to update the database with no active transaction is represented by: Database update
Manual
8

JPA Lifecycle Events

throws an exception within an active transaction, the transaction is marked for rollback
Manual
8

JPA Persistable Types

the original classes and enable transparent activation and transparent persistence. For example
Result
8

ObjectDB License

days of the purchase date, provided that you haven't activated your license. Server License ObjectDB
Manual
8

Running JPA Queries

").executeUpdate(); A TransactionRequiredException is thrown if no transaction is active. On success
Tutorial
8

Step 4: Add a Servlet Class

the transaction if still active) is closed. The next step is adding a JSP page that will produce the guestbook page output.
Tutorial
8

Step 4: Add a Servlet Class

the page output. Finally, the database connection (including the transaction if still active) is closed
Manual
8

SELECT clause (JPQL / Criteria API)

are not associated with an EntityManager and changes to them when a transaction is active are not
Issue
8

Explorer bug ? Objects seem to be missing from database in Class view, but are present as references

1st project)) INFO: RequestBean []: Created: com.greensoft.entity.Activity [null](TEST: the 1st activity) INFO: RequestBean []: Persisted: com.greensoft.entity.Activity [14](TEST: the 1st activity) INFO: RequestBean []: Created: com.greensoft.entity.Activity [null](TEST: the 2nd activity) INFO