Examples of oracle.toplink.essentials.sessions.UnitOfWork

Package oracle.toplink.essentials.sessions

Examples of oracle.toplink.essentials.sessions.UnitOfWork

oracle.toplink.essentials.sessions.UnitOfWork
Purpose: To allow object level transactions. This class represents the public API of the unit of work and should be used to maintain complete compatibility.
Description: The unit of work is a session that implements all of the normal protocol of a TopLink session. It can be spawned from any other session including another unit of work. Objects can be brought into the unit of work through reading them or through registering them. The unit of work will opperate on its own object space, that is the objects within the unit of work will be clones of the orignial objects. When the unit of work is commited, all changes to any objects registered within the unit of work will be commited to the database. A minimal commit/update will be performed and any foreign keys/circular reference/referencial integrity will be resolved. If the commit to the database is successful the changed objects will be merged back into the unit of work parent session.
Responsibilities:
- Allow parallel transactions against a session's objects.
- Allow nested transactions.
- Not require the application to write objects that is changes, automatically determine what has changed.
- Perform a minimal commit/update of all changes that occured.
- Resolve foreign keys for newly created objects and maintain referencial integrity.
- Allow for the object transaction to use its own object space.

    super.beginTransaction(entityManager, definition);
    if (!definition.isReadOnly() && !this.lazyDatabaseTransaction) {
      // This is the magic bit. As with the existing Spring TopLink integration,
      // begin an early transaction to force TopLink to get a JDBC Connection
      // so that Spring can manage transactions with JDBC as well as TopLink.
      UnitOfWork uow = (UnitOfWork) getSession(entityManager);
      uow.beginEarlyTransaction();
    }
    // Could return the UOW, if there were any advantage in having it later.
    return null;
  }

View Full Code Here

    super.beginTransaction(entityManager, definition);
    if (!definition.isReadOnly() && !this.lazyDatabaseTransaction) {
      // This is the magic bit. As with the existing Spring TopLink integration,
      // begin an early transaction to force TopLink to get a JDBC connection
      // so that Spring can manage transactions with JDBC as well as TopLink.
      UnitOfWork uow = (UnitOfWork) getSession(entityManager);
      uow.beginEarlyTransaction();
    }
    // Could return the UOW, if there were any advantage in having it later.
    return null;
  }

View Full Code Here

  * @param entity
  */
  public void refresh(Object entity){
        try {
            verifyOpen();
            UnitOfWork uow = getActivePersistenceContext(checkForTransaction(!isExtended()));
            if(!contains(entity, uow)) {
                throw new IllegalArgumentException(ExceptionLocalization.buildMessage("cant_refresh_not_managed_object", new Object[]{entity}));
            }
            ReadObjectQuery query = new ReadObjectQuery();
            query.setSelectionObject(entity);
            query.refreshIdentityMapResult();
            query.cascadeByMapping();
            query.setLockMode(ObjectBuildingQuery.NO_LOCK);
            Object refreshedEntity = null;
            refreshedEntity = uow.executeQuery(query);
            if(refreshedEntity == null) {
                //bug3323, should also invalidate the shared cached object if object not exists in DB.
                uow.getParent().getIdentityMapAccessor().invalidateObject(entity);
                throw new EntityNotFoundException(ExceptionLocalization.buildMessage("entity_no_longer_exists_in_db", new Object[]{entity}));
            }
        } catch (RuntimeException e) {
            this.setRollbackOnly();
            throw e;

View Full Code Here

TOP

Related Classes of oracle.toplink.essentials.sessions.UnitOfWork

oracle.toplink.essentials.internal.ejb.cmp3.base.EntityManagerImpl

org.springframework.orm.jpa.vendor.TopLinkJpaDialect

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.