code: private int getGlobalNoOfParticipants() throws Exception{
          if(sid == null){
              globalNoOfParticipants = calls.size();
          }else{
              CallDetailRecordsDao dao = storage.getCallDetailRecordsDao();
              globalNoOfParticipants = dao.getTotalRunningCallDetailRecordsByConferenceSid(sid);
          }
          if(logger.isDebugEnabled())
              logger.debug("sid: "+sid+"globalNoOfParticipants: "+globalNoOfParticipants);
          return globalNoOfParticipants;
      }
docs: get global total no of participants from db
  @throws Exception