2D array in proto file for C++ grpc

[Anirudh Kasturi]

Hello folks,

I have a 2D array emulation in my proto file.

In C++, after generating the protobuf files,  I see I have methods declared for adding "columns" (add_columns) in the pb.h  without any parameters.  Also there is another method declared to add "records" (add_records) in the pb.h without any parameters.  

In Java the generated functions accept message builder as a parameter and it is easy to construct the request.

In C++ for fields in proto file with standard datatypes like string and int I have setters that accept the string and int as parameters.  For type google.protobuf.Value or type Record, I have no parameters. 

Here is the code.  How can I populate the request with the "columns" values of type google.protobuf.Value and "records" values of type Record?  Any help is appreciated.  Thank you !

message DataMessage {

        int32 Status = 1;

        int32 Entries = 2;

        repeated string columnNames = 4;

        // By repeating this message, we somewhat emulate a 2D array

        message Record {

                repeated google.protobuf.Value columns = 1;

        }

        repeated Record records = 5;

}

 

[Eric Gribkoff]

If I'm understanding your question correctly, you are asking about setting nested message values in a proto using the C++ API. The protobuf documentation provides an example of doing this at https://developers.google.com/protocol-buffers/docs/cpptutorial#writing-a-message.

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[Anirudh Kasturi]

Thanks a lot Eric ! Yes I saw this example before, but after your email, when I again looked at it, things made a lot of sense.  

Best,

Anirudh