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12

JPA Persistable Types

. It can contain constructors, methods, fields and nested types with any access modifiers (public, protected ... their ordinal numbers. Caution is required when modifying an enum type that is already in use in
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Eclipse Public License - v 1.0

the Agreement is copyrighted and may only be modified in the following manner. The Agreement Steward ... . No one other than the Agreement Steward has the right to modify this Agreement. The Eclipse Foundation
12

Working with JPA Entity Objects

Entities section. If a managed entity object is modified within an active transaction the change ... the Configuration chapter. By default, managed entity objects that have not been modified or removed
8

JPA Lifecycle Events

- when an entity is identified as modified by the EntityManager. @PostUpdate - after updating an entity in
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ObjectDB Website - Terms and Conditions of Use

, and under this license you may not: modify or copy the materials; use the materials for any commercial purpose
8

Deleting JPA Entity Objects

. A TransactionRequiredException is thrown if there is no active transaction when remove is called because operations that modify
8

DELETE Queries in JPA/JPQL

a separate EntityManager for DELETE queries. As with any operation that modifies the database, DELETE
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Step 3: Define an EJB Session Bean

to wrap every operation that modifies the database (such as persist) by transaction begin and commit
0

javax.jdo.JDOEntityManager

, String name) Get a modifiable FetchGroup for the Class and name. Get a modifiable FetchGroup for the Class and name. If a modifiable FetchGroup already exists in the PersistenceManager scope, return ... store. If the object identity is being changed in the transaction, by the application modifying
0

javax.jdo.PersistenceManager

) Get a modifiable FetchGroup for the Class and name. Get a modifiable FetchGroup for the Class and name. If a modifiable FetchGroup already exists in the PersistenceManager scope, return it. If not ... is being changed in the transaction, by the application modifying one or more of the application key fields

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

Need Help?

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