Refer to the EJB spec. The container will not allow multiple threads to use the same instance of an SLSB. From the spec - "The container must ensure that only one thread can be executing an instance at any time". Given that, why would you want to synchronize on an EJB method anyways ? Also, SLSB have no state (no instance variables).  The same principle applies to SFSB in addition to the fact an instance is tied to a single client.

Tareq

On May 15, 2006, at 2:40 AM, Andreas Berg wrote:

You shouldn't. The only reason to synchronize a stateless session bean is if your bean is not stateless. Then ask yourself why you chose a stateless bean for some stateful purpose.
 
If you really want to synchronize your SLSB you need to think about the runtime environment. If all the instances of the SLSB run in a single JVM, you can use the standard Java synchronization features inside the bean to synchronize. But this doesn't work with a clustered environment. AFAIK there is no standard approach to solve this.
 
Kind regards,
 
Andreas.
 
 
Andreas Berg
Zelfi AG
Hechtsheimer Straße 33
55131 Mainz
Telefon: 06131-9064850
Telefax: 06131-9064853
 


Von: A mailing list for Enterprise JavaBeans development [mailto:EJB-INTEREST@JAVA.SUN.COM] Im Auftrag von Kalra, Ashwani
Gesendet: Montag, 15. Mai 2006 06:42
An: EJB-INTEREST@JAVA.SUN.COM
Betreff: Synchronizing ejb method

Hi,
The client of my ejb can be an jsp or standalone java class.  How can I synchronize access to the SLSB ejb method? I am using ejb2.0 version
 
 

__________________
Regards
Ashwani Kalra

 
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