public static ProcessContext addMentioners(ExoSocialActivity activity, String[] mentioners) {
    //
    StreamProcessContext processCtx =
        StreamProcessContext.getIntance(
            StreamProcessContext.UPDATE_ACTIVITY_MENTIONER_PROCESS, ctx);
    processCtx.activity(activity).mentioners(mentioners);

    try {
      processCtx.getTraceElement().start();
      ctx.getServiceExecutor().async(StreamProcessorFactory.addMentioners(), processCtx);
      processCtx.getTraceElement().end();
    } finally {
      LOG.debug(processCtx.getTraceLog());
    }

    return processCtx;
  }