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Manual
106

Retrieving JPA Entity Objects

. JPA queries and JPQL are described in chapter 4. Retrieval by Refresh Managed objects can be reloaded from the database by using the refresh method: em.refresh(employee); The content ... since it was retrieved. An IllegalArgumentException is thrown by refresh if the argument is not
Manual
77

Locking in JPA

employee = em.find( Employee.class, 1, LockModeType.PESSIMISTIC_WRITE); Similarly, the refresh method can also receive a lock mode: em.refresh(employee, LockModeType.PESSIMISTIC_WRITE ... , properties); ... em.refresh(employee, LockModeType.PESSIMISTIC_WRITE, properties); Setting
JDO Doc
72

refresh(pc)

Method javax.jdo.PersistenceManager void refresh(   Object pc ) Refresh the state of the instance from the data store. In an optimistic transaction, the state of instances in the cache might not ... will refresh nontransactional state. Parameters: pc - the instance to refresh. Since: JDO 1.0
JPA Doc
69

CacheStoreMode.REFRESH

Enum Constant javax.persistence.CacheStoreMode REFRESH Insert/update entity data into cache when read from database and when committed into database. Forces refresh of cache for items read from database. Since: JPA 2.0
JPA Doc
69

CascadeType.REFRESH

Enum Constant javax.persistence.CascadeType REFRESH Cascade refresh operation Since: JPA 1.0
JPA Doc
69

refresh(entity)

Method javax.persistence.EntityManager void refresh(   Object entity ) Refresh the state of the instance from the database, overwriting changes made to the entity, if any. Parameters: entity - entity instance Throws: IllegalArgumentException - if the instance is not an entity or the entity is not
JPA Doc
69

refresh(entity, lockMode)

Method javax.persistence.EntityManager void refresh(   Object entity,   LockModeType lockMode ) Refresh the state of the instance from the database, overwriting changes made to the entity, if any, and lock it with respect to given lock mode type. If the lock mode type is pessimistic and the entity
JPA Doc
69

refresh(entity, lockMode, properties)

Method javax.persistence.EntityManager void refresh(   Object entity,   LockModeType lockMode,   Map properties ) Refresh the state of the instance from the database, overwriting changes made to the entity, if any, and lock it with respect to given lock mode type and with specified
JPA Doc
69

refresh(entity, properties)

Method javax.persistence.EntityManager void refresh(   Object entity,   Map properties ) Refresh the state of the instance from the database, using the specified properties, and overwriting changes made to the entity, if any. If a vendor-specific property or hint is not recognized
Forum
34

EntityManager.refresh takes a long time

EntityManager.refresh takes a long time for entity object Person in this code:     logger.log ... .INFO, "begin refresh for person = " +             person + "  "+ new Date().toString());         em.refresh(person);         logger.log(Level.INFO, "end refresh for person = " +             person