About transaction

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Manual
10

SELECT clause (JPQL / Criteria API)

are not associated with an EntityManager and changes to them when a transaction is active are not
Manual
10

Running JPA Queries

if no transaction is active. On success - the executeUpdate method returns the number of objects
Manual
10

Retrieving JPA Entity Objects

The Java Persistence API (JPA) provides various ways to retrieve objects from the database. The retrieval of objects does not require an active transaction because it does not change the content of the database. The persistence context serves as a cache of retrieved entity objects. If a requested
Manual
10

JPA Entity Fields

in the database for the first time) is 1. For every transaction in which an entity object is modified
JDO Doc
9

makeTransactional(pc)

to transactional boundaries. Transient instances normally do not observe transaction boundaries. This method makes transient instances sensitive to transaction completion. If an instance is modified in a transaction, and the transaction rolls back, the state of the instance is restored to the state
JDO Doc
8

getObjectById(oid, validate)

it. If there is no transaction in progress, the returned instance will be hollow or persistent-nontransactional, at the choice of the implementation. If there is a transaction in progress, the returned instance ... is established to this instance, then the transaction in which the association was made will fail
JPA Doc
8

javax.persistence.spi.PersistenceUnitInfo

to be used by the persistence provider for accessing data outside a JTA transaction. Returns the non ... transaction. The data source corresponds to the named non-jta-data-source element in the persistence.xml ... to be used by the persistence provider for accessing data outside a JTA transaction Since: JPA 1.0 String
JPA Doc
8

javax.persistence.Query

query TransactionRequiredException - if there is no transaction QueryTimeoutException ... back PersistenceException - if the query execution exceeds the query timeout value set and the transaction is rolled ... - if a lock mode has been set and there is no transaction PessimisticLockException - if pessimistic
JDO Doc
7

currentTransaction()

Method javax.jdo.PersistenceManager Transaction currentTransaction() Return the Transaction instance associated with a PersistenceManager. There is one Transaction instance associated with each PersistenceManager instance. The Transaction instance supports options as well as transaction completion
JDO Doc
7

flush()

to the data store. It has no effect if a transaction is not active. If a datastore transaction is active ... transaction is active, this method obtains a datastore connection, synchronizes the cache ... is held until the end of the transaction. If exceptions occur during flush, the implementation