Introduction

The code is an oversimplified example of how to

1. Create C++ gRPC async server with multiple endpoints
2. How to asynchronously call another gRPC service from the server endpoint code

Build the example

First, built the gRPC library and the example in a container:

docker build -f grpc-ubuntu2004.Dockerfile --no-cache -t drepin/grpc-cpp:grpc-ubuntu2004 .
docker build -f grpc-cpp-async-server.Dockerfile --no-cache -t drepin/grpc-cpp:grpc-cpp-async-server .

Start an interactive bash session in the container

docker run -it --rm drepin/grpc-cpp:grpc-cpp-async-server

Run the pinger server and clients:

# In bash shell 1 run pinger service:
/opt/grpc-cpp-async/bin/Release/pinger_server.exe &
# In bash shell 2 connect to it with a block client:
/opt/grpc-cpp-async/bin/Release/pinger_client.exe

# In bash shell 1 run pinger service:
/opt/grpc-cpp-async/bin/Release/pinger_server.exe &
# In bash shell 2 connect to it with an async client:
/opt/grpc-cpp-async/bin/Release/pinger_client_async.exe

Run the talker server (that calls pinger) and client tests:

# In bash shell 1 run pinger service:
/opt/grpc-cpp-async/bin/Release/pinger_server.exe &
# In bash shell 2 run talker service:
/opt/grpc-cpp-async/bin/Release/talker_async_server.exe &
# In bash shell 3 connect to it with an async client:
/opt/grpc-cpp-async/bin/Release/talker_client.exe