About Persistence Context

manual

Working with JPA Entity Objects

Explains the entity object lifecycle and the persistence context.... Entity Object Life Cycle The Persistence Context Entity Object Life Cycle The life cycle ...

 
tutorial

Step 3: Add a Context Listener Class

Explains how to add a servlet context listener (to manage an application scope EntityManagerFactory) in an Eclipse Web Application.... by a JPA's EntityManagerFactory javax.persistence.EntityManagerFactory JPA interface Interface used to ... stores it as an application scope attribute in the servlet context - when the web application starts ( contextInitialized ). ...

 
tutorial

Step 3: Add a Context Listener Class

Explains how to add a servlet context listener (to manage an application scope EntityManagerFactory) in a NetBeans Web Application.... by a JPA's EntityManagerFactory javax.persistence.EntityManagerFactory JPA interface Interface used to ... stores it as an application scope attribute in the servlet context - when the web application starts ( contextInitialized ). ...

 
manual

Storing JPA Entity Objects

Explains how to use JPA to store (persist) entity objects in the database.... the object with an owner EntityManager javax.persistence.EntityManager JPA interface Interface used to interact with the persistence context. See JavaDoc Reference Page... em and changes its state to ...

 
api-jpa

javax.persistence.EntityManager

Interface used to interact with the persistence context.(Interface of JPA)

 
forum_thread

How to Use a SF with extended Persistence Context?

Hey, I have a problem to use SF with an Extended Persistence Context Regarding to Transactions. The need for an extended persistence Context emerges for the need to create queries in advance for fast execution so I need to store the queries and I need an EntityManager that doesn't get closed between calls. When I call the SF directly no problem happens but if I use SL to hold a reference to the SF I get com.objectdb.o._PersistenceException: Attempt to begin a new transaction when a transaction is active. ... Hey, I have a problem to use SF with an Extended Persistence Context Regarding to Transactions. The need for an extended persistence ...

 
issue

objectdb-2.6.9_06: Extended Persistence Context fails: 'Attempt to begin a new transaction when a transaction is active'

objectdb-2.6.9_01 NetBeans8.1+Glassfish4.1.1 Mac OS X Possibly related: How to Use a SF with extended Persistence Context? Test mini web app at: https://www.webel.com.au/downloads/objectdb/GreensoftObjectdbTestWebMini3683.2016-09-29.tgz ... Possibly related:  How to Use a SF with extended Persistence Context? [EDIT: 2006-09-29 New improved version of test mini web app ...

 
manual

Database Connection using JPA

Describes the main JPA interfaces: EntityManagerFactory, EntityManager and EntityTransaction. Working with the Java Persistence API (JPA) consists of using the following interfaces: This ... is represented by an EntityManager javax.persistence.EntityManager JPA interface Interface used to interact with the persistence context. See JavaDoc Reference Page... instance, which also provides ...

 
manual

Detached Entity Objects

Explains detached entity objects and how to work with detached objects in JPA, including merging them into an EntityManager.... they are not managed by any EntityManager javax.persistence.EntityManager JPA interface Interface used to interact with the persistence context. See JavaDoc Reference Page... but still represent objects ...

 
forum_thread

Object DB vs EclipseLink/TopLink: Unloaded relationships in detached entities

This topic is for those considering migrating from EclipseLink JPA or TopLink to ObjectDB JPA. ... the JPA spec by ObjectDB, but thanks to insistence and persistence from ObjectDB support I now concede the difference is due to an ... as described here: Extended Persistence Context in Stateful Session Beans This however has the consequence of ...