如何在C ++中使用gRPC同时连接到多个服务器？

Question

I wanted to submit the same data to multiple servers at the same time using gRPC.

I looked at the greeterAsyn2 c++ example: https://github.com/grpc/grpc/blob/v1.8.x/examples/cpp/helloworld/greeter_async_client2.cc

From the example: In order to create 1 channel you can just do this:

GreeterClient greeter(grpc::CreateChannel(
            "localhost:50051", grpc::InsecureChannelCredentials()));

As this would create the stub for the channel:

class GreeterClient {
  public:
    explicit GreeterClient(std::shared_ptr<Channel> channel)
            : stub_(Greeter::NewStub(channel)) {}
}

And I would be able to submit data using

greeter.SayHello("hello world");  

But what if I want to submit data to 2 different servers using 2 different channels?

If I would just add another GreeterClient object called greeter2:

GreeterClient greeter2(grpc::CreateChannel(
            "10.0.0.3:9008", grpc::InsecureChannelCredentials()));

I get a segmentation fault when trying to submit the data to the second server:

greeter2.SayHello("hello world");  

Answer 1

What you are doing seems okay, I will need to see the stack trace to see what is going wrong.

Consider the channel as an abstract data pipe to a service and if you want to talk to multiple servers, just create multiple channels and send rpcs on them separately.