• Post Reply Bookmark Topic Watch Topic
  • New Topic

Activation

 
Mandan Happy
Ranch Hand
Posts: 65
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Dear Geeks,
Is Activation a RMI only phenomena...is there anything like RMI daemon out there in the CORBA world....which ORBS??.
Thanks in Advance
Ignorant_About_Corba_Guy
 
Michael Ernest
High Plains Drifter
Sheriff
Posts: 7292
Netbeans IDE VI Editor
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
The principle of activation first shows up in RPC (Remote Procedure Call) semantics. RPC is a Sun innovation; it was designed to help separate socket details from "just calling stuff" on the remote machine. RPC makes it "simpler" to write distributed programs because the details of data exchange in the networking layer get generalized and handled through pre-compilation.
The idea of waking up a program upon demand is essential to the way RPC works. You can conserving system memory and resources mure effectively if you run one program that then loads needed programs specified by a client request. JVM's don't have a daemon or "TSR" (terminate-and-stay-resident) facility, so the only way to emulate this feature is by having one program invoke another.
The real key here is persistence, or being able to quiesce the data when there's clearly no demand for it. Not keeping files open helps assure the integrity of file data as well as conserve the system's limited pool of file descriptors.
------------------
Michael Ernest, co-geek of: The Complete Java 2 Certification Study Guide
[This message has been edited by Michael Ernest (edited December 20, 2001).]
 
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!