code: public Date setDatastreamState(Context context,
                                     String pid,
                                     String dsID,
                                     String dsState,
                                     String logMessage) throws ServerException {
          return worker.setDatastreamState(context,
                                           pid,
                                           dsID,
                                           dsState,
                                           logMessage);
      }
docs: Delegate to the JournalWorker.