• Post Reply Bookmark Topic Watch Topic
  • New Topic

EJB Home Factory  RSS feed

 
Arijit Ghosh
Ranch Hand
Posts: 174
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I plan to implement EJB Home Factory but this involves caching oh EJB Home.
Can anyone tell me whether JBOSS and JONAS allows stale homes ?
 
Tim Holloway
Bartender
Posts: 18662
71
Android Eclipse IDE Linux
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Yes. It's common practice to cache the Home interface in order to avoid the JNDI overhead, and, in fact, I'm preparing to publish something that does just that.
The downside is that if you hot-redeploy the EJB, the home interface reference will go stale unless you add logic to detect and correct that.
 
Arijit Ghosh
Ranch Hand
Posts: 174
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Thanks Tim. But I need something urgently... I am using Jboss. I have edited the necessary web.xml and ejb-jar.xml file.

Now the main thing ---
to write the EJBHome Factory Java file ....
Any pointers ?
 
Tim Holloway
Bartender
Posts: 18662
71
Android Eclipse IDE Linux
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
The way I do it is just to create a servlet that runs at server startup. In that servlet's init() method, I lookup the home interface(s) and store them into the application context.
 
Simon Brown
sharp shooter, and author
Ranch Hand
Posts: 1913
6
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Take a look at Floyd's EJB Design Patterns book on http://www.theserverside.com.
The way that I've done it is simply to have a singleton class through which you can lookup and cache JNDI references. Using a singleton does mean that you may have more than one copy in a cluster, but it does mean that you can use the factory from the presentation (web) and business (ejb) tiers of your architecture.
Simon
 
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!