[jboss-user] [JBoss Cache Users] - Re: how to lock a node for update?

[manik.surtani@jboss.com]

"alllle" wrote : 
  | I assume you are referring to some thing like this (from the doc):
  | // SNIP
  | 
Yes.

"alllle" wrote : 
  | I wonder if you can explain it in a little more detail. I need some clarification to my confusions:
  | - when is the lock obtained? is it, like the write lock, at the time when the transaction commits or it is at the time when the read happens?
  | 
When the read happens.  

"alllle" wrote : 
  | - What is considered as a "read"? I mean, does cache.getNode() considered a "read", or only when I do a subsequent node.get("key") is when the lock obtained?
  | 
cache.getNode() is a read.

"alllle" wrote : 
  | - With "REPEATABLE_READ" isolation, is the "write skew" still a problem? - I think it's not but I'd like to get a confirmation from you.
  | 
Write skews are *only* a problem with R_R.  See the discussion in the user guide for details.

"alllle" wrote : 
  | - What is the scope of the current "InvocationContext"? Is it within the current transaction, or current thread, or something else?
  | 
Invocation contexts last for, well, an invocation!  :-)



View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4256831#4256831

Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4256831