Spring Boot gRPC demo in Kotlin

Example code to show how to make a gRPC server using Spring Boot & gRPC Spring Boot Starter plugin in Kotlin.

Instructions

Checkout the repo and then do gradle build in order to generate the Proto files.

Start the server with java -jar build/libs/kotlin-grpc-demo-1.0-SNAPSHOT.jar.

gRPC server will run on port 6565 by default.

Connect a python client

Install the grpcio-tools package:

$ pip install grpcio-tools

Use the following command to generate the Python code for the protobuf:

$ mkdir python_client
$ cd python_client
$ python -m grpc_tools.protoc -I../src/main/proto --python_out=. --grpc_python_out=. ../src/main/proto/demo.proto

Run this to connect to the server and make a request:

import grpc
import demo_pb2_grpc
import demo_pb2
channel = grpc.insecure_channel('localhost:6565')
stub = demo_pb2_grpc.DemoStub(channel)
request = demo_pb2.DemoRequest()
response = stub.SayHello(request)
print(response)