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From "angela (JIRA)" <j...@apache.org>
Subject [jira] Created: (JCR-224) Lock: Session.addLockToken(String) does make the session to a lock holder
Date Tue, 27 Sep 2005 12:42:48 GMT
Lock: Session.addLockToken(String) does make the session to a lock holder
-------------------------------------------------------------------------

         Key: JCR-224
         URL: http://issues.apache.org/jira/browse/JCR-224
     Project: Jackrabbit
        Type: Bug
  Components: locks  
    Reporter: angela


JSR170 says:

Lock.getLockToken(): 
"May return the lock token for this lock. If this Session holds the lock token for this lock,
then this method will return that lock token. If this Session does not hold the applicable
lock token then this method will return null."

Session.addLockToken(String lt):
"Adds the specified lock token to this session. Holding a lock token allows the Session object
of the lock owner to alter nodes that are locked by the lock specified by that particular
lock token."

and:

"Note that, as mentioned above, any user with the correct lock token assumes the power to
remove a lock and alter nodes under that lock. It does not have to be the lock owner."

If i remember the discussion regarding the locking correctly, it was decided, that the locktoken
is turned to any session, that contains the proper token. And: the Lock.getLockToken() is
the only way to find out, whether a given session is allowed to modify a locked node (in contrast
to the isLocked() method). 

I have the impression, that the current implementation does not respect this:

Lock.getLockToken() passes the call to the LockInfo object. The latter performs the following
check:

public String getLockToken(Session session) {
        if (session.equals(lockHolder)) {
            return lockToken.toString();
        }
        return null;
    }

where the lockHolder is set to a particular session in consequence to Session.addLockToken
but only if the lockHolder is null... otherwise the call it is ignored (LockManagerImpl line
468). 

however, from the above quotes, i would rather expect, that the method should check, if the
given Session holds the lockToken associated with this lock. 

regards
angela

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