how to stream CSV data over gRPC?

Question

I'm fairly new to microservices and grpc itself so excuse any ignorance. I have a CSV file and I'm trying to iterate through the file line by line in one microservice and then stream each line to another microservice. The second microservice would then do some sort of calculation before being pushed onto a webserver. Does anyone know how you'd go about this?

Answer 1

You should use bidi-stream for this;

• client

for (line: file.readline()) {
    requestObserver.onNext(line);
}
requestObserver.onCompleted();

• server

StreamObserver<String>{
   onNext(HelloMessage helloMessage) {
     // handle content here
   }
}