Interface LockManager

public void lock(Object obj,
                 Object owner,
                 int timeout)
            throws LockNotGrantedException,
                   ClassCastException,
                   ChannelException

Obtain lock on obj for specified owner. Implementation should try to obtain lock few times within the specified timeout.

Parameters:

obj - obj to lock, usually not full object but object's ID.

owner - object identifying entity that will own the lock.

timeout - maximum time that we grant to obtain a lock.

Throws:

LockNotGrantedException - if lock is not granted within specified period.

ChannelException - if something bad happened to communication channel.

public void unlock(Object obj,
                   Object owner)
            throws LockNotReleasedException,
                   ClassCastException,
                   ChannelException

Release lock on obj owned by specified owner.

Parameters:

obj - obj to lock, usually not full object but object's ID.

owner - object identifying entity that will own the lock.

Throws:

ChannelException - if something bad happened to communication channel.