Hi,
 I am looking for is some usage examples of session-per-thread model in a
JSE environment while using JPA in Spring Framework environment.

To elaborate the requirements:

1. Must use ApplicationContext in a JSE environment (not
WebApplicationContext)

2. A pair of Spring Beans B1, B2 each scoped as 'prototype' is injected with
  @PersistenceContext EntityManager em;

3. This is the implementation of B1:
  public class B1 {
  @PersistenceContext EntityManager em;
 
  @Transactional
  public EntityManager getEntityManager() {
    return em;
  }

 Same is B2.

4. Now, by session-per-thread model, I mean, the following assertion must
satisfy when called from the same thread:
  // call B1, B2 from same thread
   EntityManager em1 = b1.getEntityManager();
   EntityManager em2 = b2.getEntityManager();

  assert em1 == em2;
  assert em1.getDelegate() == em2.getDelegate();

  Interestingly, I am seeing the first assertion pass but the second
fail. While what I want is the second assertion to pass because em1, em2 are
mere proxy while em1.getDelegate() is the actual OpenJPA EntityManager.

5. The application context uses
    org.springframework.orm.jpa.JpaTransactionManager
and org.springframework.orm.jpa.LocalEntityManagerFactoryBean.


Question:
1. Is it possible to do get such a session-per-thread model via Spring
configuration only or one must develop some custom code?

2. Can someone point me to code samples where similar session-per-thread
model is attempted?

3. A TransactionSynchronizationManager exists in Spring codebase ... that
seems to address the issue of binding a resource with a key -- any pointer
to its usage?

Thanks in advance --
--
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