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About Transaction

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Tutorial
8

Step 2: Entity Class and Persistence Unit

/persistence_2_0.xsd"> transaction-type="JTA"> com
Tutorial
8

Step 2: Entity Class and Persistence Unit

.com/xml/ns/persistence/persistence_2_0.xsd"> transaction
Tutorial
8

Step 2: Entity Class and Persistence Unit

name="GuestbookPU" transaction-type="RESOURCE_LOCAL"> com.objectdb.jpa.Provider
Tutorial
8

Step 4: Add a Servlet Class

the transaction if still active) is closed. The next step is adding a JSP page that will produce the guestbook page output.
Tutorial
8

Step 4: Add a Servlet Class

the page output. Finally, the database connection (including the transaction if still active) is closed
FAQ
8

What is ObjectDB?

ObjectDB is an Object Oriented Database Management System (ODBMS). It provides all the standard database management services (storage and retrieval, transactions, lock management, query processing, etc.), but it uses an object oriented model to store and manage data. You can easily store ordinary
Manual
8

SELECT clause (JPQL / Criteria API)

are not associated with an EntityManager and changes to them when a transaction is active are not
JDO Doc
7

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
6

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
6

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