question: public int registerHandler ( GitRebaseEditorHandler handler ) { addInternalHandler ( ) ; Integer rc = null ; synchronized ( myHandlersLock ) { for ( int i = Integer . MAX_VALUE ; i > 0 ; i -- ) { int code = Math . abs ( oursRandom . nextInt ( ) ) ; if ( code > 0 && ! myHandlers . containsKey ( code ) ) { rc = code ; break ; } } if ( rc == null ) { throw new IllegalStateException ( "There is a problem with random number allocation" ) ; } myHandlers . put ( rc , handler ) ; } return rc ; }
target:  Register the handler in the service