why use two servicelocator?

[chao cai]

I see the post here said use two servicelocator one for web tier and one for business tier,Why?

[Ali Reza Hosseini]

i think this is because in the web tier you need to access some session beans as facades to the business tier, so you use a service locator.

on the other hand in the business tier from a session bean you need to access some other components such as entity beans or other session beans.
therefor you need here a service locator also ..

[chao cai]

In my opinion ,one is enough you can the getHome/getLocalHome method provide by servicelocator will return the EJBHome/EJBLocalHome,not the special EJBHome such as XXXHome.