[jboss-user] [JBossCache] - Re: Concurrency problem

[manik.surtani@jboss.com]

JBC does not acquite cluster-wide locks.  These are only done when a tx is committing.

Try this:


  | 
  | boolean doSomething()
  | {
  |     int X = -1;
  |     while (X == -1)
  |     {
  |         try
  |         { 
  |             X = getX();
  |         }
  |         catch (RollbackException e)
  |         {
  |             X = -1;
  |         }
  |     }
  |     return X;
  | }
  | 
  | int getX()
  | {
  |     // start a new tx here.
  |     Integer X = (Integer) cache.get(fqn, key);
  |     X++;
  |     cache.put(fqn, key, X);
  |     // commit tx here.
  |     return X;
  | }
  | 
  | 

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