[GitHub] [incubator-brpc] feng-y edited a comment on issue #1243: brpc::Join(CallId id) 支持带超时的等待

[GitBox <gi...@apache.org>]

feng-y edited a comment on issue #1243:
URL: https://github.com/apache/incubator-brpc/issues/1243#issuecomment-693219844


   一个不太靠谱的基于future的实现
   ```
   void HandleEchoResponse(
           brpc::Controller* cntl,
           example::EchoResponse* response,
           std::shared_ptr<std::promise<bool>> waiter) {
       waiter->set_value(true);
   }
         std::shared_ptr<std::promise<bool>> waiter(std::make_shared<std::promise<bool>>());
   
           // Because `done'(last parameter) is NULL, this function waits until
           // the response comes back or error occurs(including timedout).
           google::protobuf::Closure* done = brpc::NewCallback(
               &HandleEchoResponse, &cntl, &response, waiter);
   
           auto call_id = cntl.call_id();
           stub.Echo(&cntl, &request, &response, done);
           LOG(INFO) << "waiting Join:" << errno << ", " << EINVAL;
           // brpc::Join(call_id);
           if (waiter->get_future().wait_for(std::chrono::microseconds(1)) != std::future_status::ready) {
             LOG(INFO) << "timeout";
             brpc::StartCancel(call_id);
           } else {
           .......
          }
   
   ```


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