Java的gRPC protobuf生成器-生成的不同代码

Question

I look through different tutorials about gRPC and use it in Java, but code I get after protoc launch and code in tutorials are quite different. For instance, I look video from Ray Tsang and service interface looks like GreetingServiceGrpc.GreetingService, but when Itry to generate my own, I get GreetingService.Interface. Also, there's no effect from 'stream' keyword in my generated code, so I don't understand how can I use it. I have a feeling that I use some wrong tool at all or at least another version of it. Please, point me the right way :)

protoc.exe --version  // 3.0.0

Answer 1

protoc.exe by itself only generates protobuf message classes. To generate gRPC code, it needs to work with the gRPC code generator plugin. The easiest way to use it is through protobuf-maven-plugin or protobuf-gradle-plugin , which will download protoc and the gRPC code-gen plugin and run them for you. You can find example snippets for the Maven/Gradle plugins from the README of gRPC Java. There is also a stand-alone example project that uses the Gradle plugin.