Re: Inaccurate active session count in JavaMonitor (Solved)

Could not find isLocked() method in MultiECLockManager.  Is it a customized 
method or my version is older:

/* MultiECLockManager.java created by j-rochkind@xxxxxxxxxxxxxxxx on Mon 
21-Jul-2003 */

methods available are:
lock
unlock
registerEditingContext
unregisterEditingContext
makeStrongReferences
findReference
emptyUnregisterQueue
sameThreadAssert

Cheers

Cheong Hee

----- Original Message ----- 
From: "Chuck Hill" <chill@xxxxxxxxxxxxxxxxxx>
To: "Cheong Hee (Gmail)" <chng34@xxxxxxxxx>
Cc: <webobjects-deploy@xxxxxxxxxxxxxxx>
Sent: Tuesday, July 21, 2009 10:04 PM
Subject: Re: Inaccurate active session count in JavaMonitor (Solved)



On Jul 21, 2009, at 2:44 AM, Cheong Hee (Gmail) wrote:

> Yeap, exception found.
>
> lockManager.unlock() throws IllegalStateException when lock count is 
> zero.

Which says to me that it was not locked to begin with.  Try

if (lockManager.isLocked()) {
    lockManager.unlock();
}


> When the lock count is > 1, MultiEC lock manager is happier to  unlock all 
> ECs, but not when lock count=0.  Try to relate why the  lock count=0 is 
> handled by exception.  Is it acting like an  insurance to alert the users 
> that probably error occur when multi- ECs has registered (and assumed 
> locked), but when no lock is found  when called unlock().  Should it or 
> not throwing exception when lock  count = 0?

The throw is correct.  It ensures that your code has balanced calls to
lock and unlock.


> Great thanks, Chuck and it clears doubt on my bad coding.


You are welcome.

Chuck


--
Chuck Hill             Senior Consultant / VP Development

Learn WO at WOWODC'09 East in Montréal this August!
http://www.wocommunity.org/wowodc09/east

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