Re: Is tapestry coupled with Hibernate API?

[matias.blasi]

Exactly that! I am seeing the code of
src/test/java/com/kenai/tapestryjpa/example/app0/services/UserDAOImpl.java

Here you inject:

package com.kenai.tapestryjpa.example.app0.services;

import javax.persistence.EntityManager;

public class UserDAOImpl implements UserDAO {                                   
       
        private final EntityManager entityManager;
        public UserDAOImpl(EntityManager value) {
                this.entityManager = value;
        }
        public void add(User user) {
                entityManager.persist(user);
        }

As far as I understand, javax.persistence.EntityManager is an interface, so,
there should be any mechanism to determine which impl will be used at
runtime, right?

Regards,
Matías.


Piero Sartini-3 wrote:
> 
>> My only question now, is "what about tapestry-jpa?" isn't it an
>> abstraction
>> for my scenario?
>> It hasn't documentation yet, but Piero, correct me if I am wrong, if I
>> use
>> the tapestry-jpa interfaces into my DAO implementation, I would be
>> de-coupled from the JPA implementation that I will be using at runtime,
>> right?
>>
>> Anyway, I don't know how I could inject a org.hibernate.EntityManager in
>> the
>> javax.persistence.EntityManager, since they don't share any interface.
> 
> You don't need the hibernate EntityManager... just inject the JPA
> EntityManager.
> I've created a demo webapp using JPA2 yesterday. You can find it
> inside the subversion repository:
> https://svn.kenai.com/svn/tapestry-jpa~main
> 
> Also I've wrote some quick notes on how to get started with tapestry-jpa:
> http://kenai.com/projects/tapestry-jpa/pages/Quickstart
> 
> They are work in progress, but maybe its still helpful.
> 
> To make everything easier, there is now also a maven2 repository for
> tapestry-jpa:
> http://tapestry-jpa.kenai.com/maven-snapshot-repository/
> 
> Hope this helps.
> 
>         Piero
> 
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