Implementing gateways and clients
In this section, we are going to illustrate how to plug the generated client and server gRPC code into our microservices. This will help us to switch communication between them from JSON-serialized HTTP to Protocol Buffers gRPC calls.
Metadata service
In Chapter 2, we created our internal model structures, such as metadata, and in Chapter 4, we created their Protocol Buffers counterparts. Then, we generated the code for our Protocol Buffers definitions. As a result, we have two versions of our model structures – internal ones, as defined in metadata/pkg/model, and the generated ones, which are located in the gen package.
You might think that having two similar structures is now redundant. While there is certainly some level of redundancy in having such duplicate definitions, these structures practically serve different purposes:
- Internal model: The structures that you create manually for your application should be used across...
