File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Developer Certification (SCJD/OCMJD) and the fly likes I need to lock the Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Certification » Developer Certification (SCJD/OCMJD)
Bookmark "I need to lock the "read" function?" Watch "I need to lock the "read" function?" New topic

I need to lock the "read" function?

xiaoma wang
Ranch Hand

Joined: Mar 04, 2002
Posts: 74
hi, everybody:
In the FBM assignment, it says " Note that the locking required is effectively a "write" lock only". In my understanding, we do not need to lock the concurrently "read" activities on the record even this record is being modified by another client. Is that correct?
Xiaoma Wang
Michael Morris
Ranch Hand

Joined: Jan 30, 2002
Posts: 3451
Hi Xiaoma,
That's the way I understand it even though you may get an occasional "dirty read." You just have to remember to run the sequence lock, read, modify, unlock for a booking transaction.
Hope this helps
Michael Morris

Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius - and a lot of courage - to move in the opposite direction. - Ernst F. Schumacher
I agree. Here's the link:
subject: I need to lock the "read" function?
It's not a secret anymore!