Win a copy of Learn Spring Security (video course) this week in the Spring forum!
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic

ServiceLocator in PetStore

 
Edy Yu
Ranch Hand
Posts: 264
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
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
Ranch Hand
Posts: 1551
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
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
Ranch Hand
Posts: 264
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
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 ]
 
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic