jpa-2.0

Problem I'm writing a standalone utility program which, given a jar containing a JPA-2 annotated persistence unit, needs to programmatically get a list of all my @Entity classes in a particular persistence unit. I'd like to decide which of 2 approaches would be the way to go to get this information, and why; or if there is another better way I haven't thought of. Solution 1 Java program puts jar on the classpath, creates persistence unit from the classes in the jar using JavaSE methodologies. Then it uses the javax.persistence classes to get the JPA Metamodel, pull back list of class tokens

does anyone know if and how the solution for following question (which is written in the JPA API) can be written using the hibernate criteria API? To be more specific I have a Discussion entity that contains a list of participants (which is a list of usernames): @ElementCollection @Column(name = "user_name") @CollectionTable(name = "DISCUSSION_USER", joinColumns = @JoinColumn(name = "DISCUSSION_ID")) @OrderColumn(name = "ORDER_INDEX") private List<String> participants = new ArrayList<String>(); Now I need to retrieve all Discussions where a given username is a participant. If I would have

I am using JPA 2.0 and my persistence provider is Hibernate; however, I'd like to just include a standard API from javax, but in central, there is no 2.0 artifact. I am currently using the Hibernate JPA 2.0 artifact, but I'd like to use something more standard. Is this possible? Thanks, Walter Pascal Thivent I am currently using the Hibernate JPA 2.0 artifact, but I'd like to use something more standard There is still no javax.persistence:persistence-api:jar:2.0 artifact from Sun/Oracle. Either use the full javax:javaee-api:jar:6.0 artifact if you want something from Sun/Oracle... or just

I am trying to persist the entity with constraint validation, when invoke persist - there is constraint that thrown and the caller get EjbTransactionRolledbackException ... so I try to call the validation explicit and throw ConstraintViolationException / RuntimeException and still the caller get EjbTransactionRolledbackException ... when I throw MyException extends Exception - the caller get MyException Even when I call explicit sc.setRollBackOnly it's still happened :( This shouldn't be the behavior. what's going on? Configuration: Netbeans 6.9.1 Glassfish 3.0.1 JPA 2.0 (EclipseLink) EJB 3.1

We are in the process of re-thinking our tech stack and below are our choices (We can't live without Spring and Hibernate due to the complexity etc of the app). We are also moving from J2EE 1.4 to Java EE 5. Technology stack Java EE 5 JPA 2.0 (I know Java EE 5 only supports JPA 1.0 but we want to use Hibernate as the JPA provider) Hibernate 3.6.0 (We already have lots of hbm files with custom types etc. so we doesn't want to migrate them at this time to JPA. This means we want both jpa/hbm mappings work together and hence the Hibernate as the JPA provider instead of using the default that

I am building a new web app and I am using Spring, JPA/Hibernate, and Postgres. Some of my tables have creation_ts and lastupdate_ts columns which are timestamp columns that track when an insert occurred and when the last update occurred on a row. I am also using a naming convention for columns in my tables so as a matter of design policy every table is guaranteed to have two columns pkey which is an integer surrogate key, and version for optimistic locking. I have two ways to keep these fields up to date. Option A: use triggers This is the solution I have in place right now, I have two