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From Dain Sundstrom <>
Subject Re: Entity bean can not remove itself
Date Tue, 11 Jul 2006 17:09:33 GMT
It has been a long time since I looked at this stuff, but I'm not  
sure an entity can remove itself.  The one thing I know for certain,  
is that calling the ejbRemove remove method has not effect on the  
entity state.  The ejbRemove method is a callback invoked by the  
entity container when the entity container has decided to remove the  
entity.  If you call this method directly, the entity container does  
not see this.

After reviewing the 2.1 spec, I can't see any where that specifies  
that entity can remove itself.  Every remove example, has another  
bean removing the target bean.  At the very least, I'd start by  
marking the entity as reentrant since a remove is conceivably  
reentrancy.  Then I'd try, entityContext.getEJB[Local]Object().remove()


On Jul 10, 2006, at 10:56 PM, D. Strauss wrote:

> Hello, Markus
> try this:
> Way a (the Collection way):
> java.util.Collection<EjbLocal> c=ejbHome.findAll();
> EjbLocal delBean=null;
> for(EjbLocal l : c){
> 	//find the bean you want to remove: for now, find the last one
> 	delBean=l;
> }
> c.remove(delBean);
> Way b (the usual way):
> EjbLocal delBean=ejbHome.findByPrimaryKey(12);
> delBean.remove();
> Best regards
> Dirk
> mahu2425 schrieb:
>> Hello Dirk,
>> I'm not sure what you mean by "collection version of ejbRemove()".
>> Could you please explain it a little bit more?
>> Thank in advance,
>> Markus
>>> Hello, Markus
>>> now I get it ^^ (at least I think so)
>>> So, to summarize it: you work with a CMP bean that is used by  
>>> various
>>> other beans (JMS in particular). After all things have been done  
>>> I want
>>> to remove the bean?
>>> Using ejbRemove() is OK but you may want to use the Collection  
>>> version
>>> of ejbRemove. I think (if I remember correctly) that ejbRemove()  
>>> always
>>> crashed the EJB container. So I used the collection method. It is a
>>> little bit difficult but it worked.
>>> Give it a try and tell us if it works.
>>> Best regards
>>> Dirk
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