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Manual
3

Database Connection using JPA

A connection to a database is represented by an EntityManager instance, which also provides ... . An EntityManagerFactory is constructed for a specific database, and by managing resources efficiently (e.g ... the content of a database require active transactions. Transactions are managed by an EntityTransaction
Forum
3

CM Transaction Implementation

Hi All, How to implement Container Managed Transaction using Glassfish / Weblogic server. Please provide us the step by step instruction, how ti achieve it       Please check the following tutorial: http://www.objectdb.com/tutorial/jpa/ee umesh
Forum
3

New Tutorial: Using BIRT with ObjectDB/JPA

Version 2.2.7 of ObjectDB added support of report generation using the popular open source Business Intelligence and Reporting Tools (BIRT). The new Report Generation with BIRT and JPA tutorial provides step by step instructions on how to use BIRT to produce reports based on data in an ObjectDB database.    
Issue
3

Persist & remove in same transaction

the number of simple entity objects in the database Retrieve the simple entity object using find by id ... the number of simple entity objects in the database Commit the transaction The count operations in step 3 & 6 both return 1 but I would've expected step 6 to return 0. Could you let me know if this is a bug
Forum
3

Report Generation with BIRT and JPA

hi In Report Generation with BIRT and JPA tutorial. step:1 completed but in step:2  "business Intelligence and Reporting tools"   is not  available. attach in image1.jpg Thank you Bimal kumar Dalei ... that BIRT was installed by Help > About Eclipse > Installation Details. hi After Installation Details
Issue
2

Once served to JSF page via @EJB query bean, many list fields are null (but same query ok after fresh persist in @PostConstruct)

showing the query result in indexTest.xhtml. The problems is illustrated by running the attached JavaEE ... either empty or populated are served as null (!). The query is performed by an @EJB: @Stateless public class ... working on my problem, as I am greatly encouraged by experiments last night that lead
Forum
2

objectdb-2.6.9_02 (with "objectdb.temp.no-enhancement-crc-check") vs. generic classes with interfaces: detailed investigation

setup: - The diagnostics here have been recorded carefully at every step, including Git tracking ... .java:274) Caused by: javax.persistence.PersistenceException: com.objectdb.o.UserException: Failed ... .objectdb.o.JPE.g(JPE.java:145) at com.objectdb.o.JPE.g(JPE.java:78) ... 6 more Caused by: com
JPA Doc
2

Criteria Query Selection and Results

The JPA Criteria API interfaces in this group are in use for setting the SELECT and ORDER BY ... clause in a criteria query is represented by Selection: Because Selection is a super interface ... expressions can be represented by CompoundSelection, which is itself a subinterface of Selection
Manual
2

CRUD Database Operations with JPA

a managed entity) by the persist method. The new Point objects are physically stored in the database ... objects in the database by using a simple query: Query q1 = em.createQuery("SELECT COUNT(p) FROM ... the results (using an ORDER BY clause) and even group results (using GROUP BY and HAVING clauses). JPQL
Manual
2

JPA Lifecycle Events

and are invoked automatically by JPA when these events occur. Internal Callback Methods Internal callback ... - when an entity is identified as modified by the EntityManager. @PostUpdate - after updating an entity in ... events by marking it with more than one annotation. By default, a callback method in a super entity