Ice and stateless servers
zet
Member ✭
in Help Center
Hi,
i'm new to Ice and come from a J2EE background, with a distant CORBA knowledge.
I've checked the documentation, but found nothing comparable to a Java Stateless Sessionbean (SSB).
Is there an easy way to build a Ice server that
o uses a pool of (stateless) objects
o guarantees that during a call, the object is used by exactly one client
o grows/shrinks the pool dynamicly
o blocks incoming connections until a pool object is available?
Thanks for any answers,
Jürgen
i'm new to Ice and come from a J2EE background, with a distant CORBA knowledge.
I've checked the documentation, but found nothing comparable to a Java Stateless Sessionbean (SSB).
Is there an easy way to build a Ice server that
o uses a pool of (stateless) objects
o guarantees that during a call, the object is used by exactly one client
o grows/shrinks the pool dynamicly
o blocks incoming connections until a pool object is available?
Thanks for any answers,
Jürgen
0
Comments
- Allocate a bunch of servants and put them in a free list.
- Write a servant locator that, for each incoming call, takes a servant from the free list, puts the servant into a in-use list, and returns that servant; if the free list is empty, block in the locate() call until a servant gets back into the free list; in the deactivate call, remove the servant from the in-use list and put it back on the free list.
All this takes only about 15-20 lines of code. If you are looking for inspiration, read the section on evictors in the doc and look at the code in demo/book/evictor. (An evictor is similar but a bit more complex than what you want to do.Cheers,
Michi.