code: public void setMaxActiveSessions( final int max ) {
          final int oldMaxActiveSessions = _maxActiveSessions;
          _maxActiveSessions = max;
          support.firePropertyChange( "maxActiveSessions",
                  Integer.valueOf( oldMaxActiveSessions ),
                  Integer.valueOf( _maxActiveSessions ) );
      }
docs: Set the maximum number of active Sessions allowed, or -1 for no limit.
  
  @param max
  The new maximum number of sessions