About transaction

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JDO Doc
9

javax.jdo.PersistenceManagerFactory

transactions. If any PersistenceManager instances have an active transaction, throw a JDOUserException, with one nested JDOUserException for each PersistenceManager with an active Transaction. If there are no active transactions, then close all PersistenceManager instances obtained from
JPA Doc
9

javax.persistence.EntityTransaction

javax.persistence Interface EntityTransaction Interface used to control transactions on resource ... begin() Start a resource transaction. Start a resource transaction. Throws: IllegalStateException - if isActive() is true Since: JPA 1.0 void commit() Commit the current resource transaction, writing
JPA Doc
9

javax.persistence.LockModeType

.OPTIMISTIC_FORCE_INCREMENT are the following. If transaction T1 calls for a lock of type LockModeType ... phenomena can occur: P1 (Dirty read): Transaction T1 modifies a row. Another transaction T2 then reads that row and obtains the modified value, before T1 has committed or rolled back. Transaction T2
JDO Doc
9

javax.jdo.spi.StateInterrogation

transaction. Parameters: pc - the instance. Returns: a copy of the ObjectId of the parameter instance as of the beginning of the transaction. Since: JDO 2.0 See Also: PersistenceManager.getObjectId(Object pc ... if there is one. Return the associated PersistenceManager if there is one. Transactional and persistent
JDO Doc
9

javax.jdo.JDOHelper

whether the instance is persistent, transactional, dirty, new, deleted, or detached ... within the current transaction. Parameters: pc - the PersistenceCapable instance. Returns: a copy of the ObjectId of the parameter instance as of the beginning of the transaction. Since: JDO 1.0
JPA Doc
8

javax.persistence.TypedQuery

or for a criteria query TransactionRequiredException - if there is no transaction ... and the transaction is rolled back Since: JPA 1.0 int getFirstResult() The position of the first result ... back TransactionRequiredException - if a lock mode has been set and there is no transaction PessimisticLockException
Tutorial
7

Step 2: Entity Class and Persistence Unit

/xml/ns/persistence/persistence_2_0.xsd"> transaction-type
Manual
7

Database Management Settings

of the database file with $ added at the end. Every transaction commit is first written to the recovery
Tutorial
7

Step 2: Entity Class and Persistence Unit

name="GuestbookPU" transaction-type="RESOURCE_LOCAL"> com.objectdb.jpa.Provider
Tutorial
7

Step 1: Create a Maven Web Project

>      javax.transaction    jta    1