This week's book giveaway is in the OCPJP forum.
We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line!
See this thread for details.
The moose likes Developer Certification (SCJD/OCMJD) and the fly likes Information return form lock Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login


Win a copy of OCA/OCP Java SE 7 Programmer I & II Study Guide this week in the OCPJP forum!
JavaRanch » Java Forums » Certification » Developer Certification (SCJD/OCMJD)
Bookmark "Information return form lock" Watch "Information return form lock" New topic
Author

Information return form lock

Ray Cheeny
Ranch Hand

Joined: Aug 21, 2002
Posts: 74
Hi,
I use the Object as the key and recordNum as the
value in the LockManager.
Now I wonder :
1. When the lock -1 has occured ,should any other
client which wants to get lock be waiting or be
informed something.
2. If I want to informed the client sth,how to do? Maybe throw a exception,right?

Thanks!!!
Mark Spritzler
ranger
Sheriff

Joined: Feb 05, 2001
Posts: 17258
    
    6

Ray the general thought on this issue is that you can safely assume that only the server when shutting down will call lock(-1).
When the server is then shutdown, any client still "connected" will start getting IOExceptions or other networking related exception, which you should already be handling on the client side, and that will be your "Message" that will be shown to the client.
Mark


Perfect World Programming, LLC - Two Laptop Bag - Tube Organizer
How to Ask Questions the Smart Way FAQ
 
jQuery in Action, 2nd edition
 
subject: Information return form lock