[seam-dev] Re: Blocked threads

[Christian Bauer]

> - Removing the joinTransaction() that is triggered on every  
> EntityHome.getInstance(). EntityQuery and EntityIdentity do the  
> same. This also doesn't seem to be necessary, at least not for Seams  
> ManagedPersistenceContext which enlists the EM with the transaction  
> on @Unwrap (and it has a condition that avoids double-joins - hence  
> only one UT JNDI lookup per request).

Checked with Emmanuel: At least for Hibernate it is OK to call  
entityManager.joinTransaction() repeatedly, it caches. However, the  
way Seam is doing it there always is a Transaction.instance() first  
which does a JNDI lookup. This gives us some more ways how we can  
rewrite that part of the code.