About activation

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Manual
11

Database Explorer [2011-09-21]

manages an active transaction for every open database file. All the editing operations are associated with the active transaction. The File > Save menu command commits the transaction (applying
Manual
11

Database Explorer

manages an active transaction for every open database file. All the editing operations are associated with the active transaction. The File > Save menu command commits the transaction (applying
JDO Doc
10

javax.jdo.PersistenceManager

if a transaction is not active. If a datastore transaction is active, this method verifies ... if flush were called, but it is not required to do so. If an optimistic transaction is active ... the persistent instance from the data store. This method must be called in an active transaction
JDO Doc
9

javax.jdo.FetchPlan

javax.jdo Interface FetchPlan Fetch groups are activated using methods on this interface ... the fetch group to the set of active fetch groups. Add the fetch group to the set of active fetch groups ... all active groups leaving no active fetch group. Remove all active groups leaving no active fetch
JDO Doc
9

javax.jdo.Transaction

environment, or if the transaction is already active. Since: JDO 1.0 See Also: setOptimistic getOptimistic ... is not active. Since: JDO 1.0 String getIsolationLevel() Get the value for transaction isolation level ... getNontransactionalRead() If true, allows persistent instances to be read without a transaction active
JDO Doc
8

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

SELECT clause (JPQL / Criteria API)

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

JPA Persistable Types

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