question: public void unlock ( Object key ) { String uid = String . valueOf ( key ) ; Transaction tr = lockedUIDHashMap . get ( uid ) ; if ( tr == null ) { return ; } try { tr . commit ( ) ; } catch ( Exception e ) { logger . warn ( "Failed to commit transaction and unlocking the object, ignoring" , e ) ; } finally { lockedUIDHashMap . remove ( uid ) ; } }
target:  Unlocks the given lock on the key