[concurrency-interest] Question about Double-checked locking
chakritsus at yahoo.com
Sun May 14 08:34:41 EDT 2006
> > No changing from synchronized to Lock doesn't make
> a difference to the
> > double-check part. You must establish a
> "happens-before" relationship
> > between the thread setting the value in the map,
> and the thread
> > reading it.
Can you elaborate "happens-before" relationship part?
Suppose If I replace HashMap wih ConcurrentHashMap,
How can I avoid double-checked locking problem.
My Aim is that if the value is not present in the map
for a key , load it from Database. Otherwise simply
use get() method and return it.
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
More information about the Concurrency-interest