In my last two posts I looked at using .proto files to define the IDL which protoc.exe along with gRPC generated our preferred language’s data files and method calls – in our case this meant generating C# files.<\/p>\n
Now let’s look at how we can extend our code a little further, for example to include meat data\/headers for sending tokens or other state between the client and server.<\/p>\n
What was generated for us?<\/strong><\/p>\n When we generated our code using the gRPC plugin, we started with the IDL method written as <\/p>\n however several overloads for this method were generated (I’ve cleaned them up to remove superfluous namespaces etc. and to make them easier to read in a blog post<\/p>\n\r\nservice MusicService {\r\n rpc Query(NotesRequest) returns (NotesResponse) {\r\n }\r\n<\/pre>\n\r\npublic virtual NotesResponse Query(\r\n NotesRequest request, \r\n Metadata headers = null, \r\n DateTime? deadline = null, \r\n CancellationToken cancellationToken = \r\n default(CancellationToken))\r\n{\r\n return Query(request, \r\n new CallOptions(\r\n headers, \r\n deadline, \r\n cancellationToken));\r\n}\r\n\r\npublic virtual NotesResponse Query(\r\n NotesRequest request, \r\n CallOptions options)\r\n{\r\n return CallInvoker.BlockingUnaryCall(\r\n __Method_Query, \r\n null, \r\n options, \r\n request);\r\n}\r\n\r\npublic virtual AsyncUnaryCall<NotesResponse> QueryAsync(\r\n NotesRequest request, \r\n Metadata headers = null, \r\n DateTime? deadline = null, \r\n CancellationToken cancellationToken = \r\n default(CancellationToken))\r\n{\r\n return QueryAsync(\r\n request, \r\n new CallOptions(\r\n headers, \r\n deadline, \r\n cancellationToken));\r\n}\r\n\r\npublic virtual AsyncUnaryCall<NotesResponse> QueryAsync(\r\n NotesRequest request, \r\n CallOptions options)\r\n{\r\n return CallInvoker.AsyncUnaryCall(\r\n __Method_Query, \r\n null, \r\n options, \r\n request);\r\n}\r\n<\/pre>\n