ServiceLocator in PetStore

[Edy Yu]

I am browsing Pet Store 1.3.1 from Sun.
Any body can give me a reason why they use one service locator for web tier and the other for Business/EJB tier. The only difference I noticed is the web tier service locator "cache" the references.

[Rufus BugleWeed]

If you're using Apache/Tomcat will your web container be in a different JVM than your EJB container? Perhaps they will even be on different machines.

[Edy Yu]

Rufus:
Let me summarize your explaination in my words. Let me know if I've got your point.
Web server could be in a differnt machine which makes JNDI lookups in the remote EJB container performancewise costly.
My question again will be, can I also use the cashing idea on the EJB tier? Remember even JNDI lookups in the same VM is time-consuming.
[ October 05, 2002: Message edited by: Edy Yu ]