About @PersistenceContext

api-jpa

JPA Annotations for Java EE

Reference (JavaDoc) of JPA 2 Java EE annotations, including @PersistenceContext, @PersistenceContexts, @PersistenceProperty, @PersistenceUnit, @PersistenceUnits and PersistenceContextType The following JPA annotations are in use to integrate JPA into a Java EE application and are managed by the Java EE container: javax.persistence.PersistenceContext javax.persistence.PersistenceContextType javax.persisten ...

 
api-jpa

javax.persistence.PersistenceContext

Expresses a dependency on a container-managed EntityManager and its associated persistence context.(Annotation of JPA)

 
tutorial

Step 3: Define an EJB Session Bean

Explains how to define an EJB session bean in a NetBeans Java EE web application.... { // Injected database connection: @PersistenceContext private EntityManager em ;   // Stores a ... em field (because it is annotated with the  @PersistenceContext annotation). Handles transactions ...

 
tutorial

Step 3: Define an EJB Session Bean

Explains how to define an EJB session bean in an Eclipse Java EE 6 web application.... { // Injected database connection: @PersistenceContext private EntityManager em ;   // Stores a ... into the em field (because it is annotated with the @PersistenceContext annotation). Handles transactions automatically using ...

 
tutorial

Step 3: Define a Spring DAO Component

Explains how to define a JPA DAO component (bean) in an Eclipse Spring MVC JPA web application project.... { // Injected database connection: @PersistenceContext private EntityManager em ;   // Stores a ... em field (because it is annotated with the  @PersistenceContext annotation). Handles transactions ...

 
tutorial

Step 3: Define a Spring DAO Component

Explains how to define a JPA DAO component (bean) in a NetBeans Spring MVC JPA web application project.... { // Injected database connection: @PersistenceContext private EntityManager em ;   // Stores a ... em field (because it is annotated with the  @PersistenceContext annotation). Handles transactions ...

 
forum_thread

JBOSS AS7 7.1.1 - Entity not persisted and createNamedQuery fire exception

I'm trying to have the guestbook example running in the following environment: jboss as 7.1.1 final oracle jdk 1.7.0_04 maven 3.0.4 objectdb 2.4.0_04 installed as a module of jboss No IDE is used for building the Guestbook.war only maven.   My GuestDAO code is as follows: ... ) private EntityManager em ; // @PersistenceContext(unitName = "guest-pu" ) private EntityManager em; ...

 
forum_thread

@OneToMany(fetch = FetchType.LAZY) list is always null

Hello. @OneToMany(fetch = FetchType.LAZY) doesn't work when using EJB or something else related to J2EE. parent.getChildren() returns null. Here is a simple example: Bean: ... Thanks for the reply. Isn't it open when using @PersistenceContext? edit ...

 
forum_thread

Update is ignored by ObjectDB

Hi! Sorry for my bad english skills. When I execute fulfilOrder, only Order entity is updated in the database, and User entity remains modified only in code, even if I go: user = smdb.find(User.class, user.id); In this source highlighted lines modifying entity, but not the database. #1 2014-01-25 20:53 Hi! Sorry for my bad english skills. When I execute fulfilOrder, only Order entity is updated in the database, an ...

 
forum_thread

Persist not working when ObjectDB and another db is used in the same application (through spring) with different tx managers

Hi,  Object are not being persisted when ObjectDB and another db is used in the same application (through spring) with different tx managers, please find an example of this below. Any help is greatly appreciate as we are currently evaluating ObjectDB to use in our new enterprise application and we need to decide if we are going to purchase it very soon. Many Thanks   Persistence.xml #1 2015-11-04 17:05 Hi,  Object are not being persisted when ObjectDB and another db is used in the same applicatio ...