About begin

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Manual
11

Database Connection using JPA

via the getTransaction method: try { em.getTransaction().begin(); // Operations ... (); } A transaction is started by a call to begin and ended by a call to either commit or rollback. All the operations
Manual
11

Setting and Tuning of JPA Queries

). The setFirstResult method is used to specify where the result window begins, i.e. how many results at the beginning of the complete result list should be skipped and ignored. The setMaxResults method
Manual
11

Obtaining a JPA Database Connection [2011-02-11]

transaction. Given an EntityManager, em, it is very easy to begin a transaction: em.getTransaction().begin
Manual
11

Database Connection using JPA [2011-08-30]

via the getTransaction method: try { em.getTransaction().begin(); // Operations ... (); } A transaction is started by a call to begin and ended by a call to either commit or rollback. All the operations
Manual
11

Obtaining a JPA Database Connection

transaction. Given an EntityManager, em, it is very easy to begin a transaction: em.getTransaction().begin
Manual
11

Updating JPA Entity Objects

.getTransaction().begin(); employee.setNickname("Joe the Plumber"); em.getTransaction().commit ... ); em.getTransaction().begin(); employee.projects[0] = new Project(); // not detected
Manual
8

Deleting JPA Entity Objects

); em.getTransaction().begin(); em.remove(employee); em.getTransaction().commit
Tutorial
8

Step 3: Define an EJB Session Bean

transaction begin and commit. The next step is adding a Servlet Class that will serve as the application controller.
Result
8

Posting to ObjectDB Website - Important Instructions [2018-08-06]

");         EntityManager em = emf.createEntityManager();         em.getTransaction().begin();         MyEntity e = new
Tutorial
8

Step 3: Add a Main Class

: em.getTransaction().begin(); for (int i = 0; i < 1000; i++) { Point p = new