public static ProcessContext connect(Identity sender, Identity receiver) {
    //
    SocialServiceContext ctx = SocialServiceContextImpl.getInstance();
    StreamProcessContext processCtx =
        StreamProcessContext.getIntance(StreamProcessContext.CONNECT_ACTIVITY_PROCESS, ctx);
    processCtx.sender(sender).receiver(receiver);

    try {
      if (ctx.isAsync()) {
        beforeAsync();
        ctx.getServiceExecutor().async(StreamProcessorFactory.connectStream(), processCtx);
      } else {
        ctx.getServiceExecutor().execute(StreamProcessorFactory.connectStream(), processCtx);
      }

    } finally {
      LOG.debug(processCtx.getTraceLog());
    }

    return processCtx;
  }