grpc-echo-example

Simple gRPC echo example of all possible kinds of methods. The server is static, while you can run the client in 4 different ways, each will communicate differently with the gRPC server:

• "simple" RPC call (no streams, you call a function and get a reponse)
• the clients streams messages to the server on a single channel
• the server streams messages to the client on a single channel
• both sides stream messages on a single channel

The server sends back the exact input the client sends, while using different methods of communication.

Instructions

Run the server first, then run any amount of clients you want, with any configuration you want.

Server

Run npm start server

Clients

Simple RPC

The clients calls a function on the server and gets a response. How to run: npm start client simple.

Client streams messages

The client sends the same message multiple times (hard coded currently) as a stream, the server returns one message in the end as a response: the amount of messages it received, alongside the original message. How to run: npm start client clientStream.

Server streams messages

The client sends the message once, while the server sends it back multiple times (hard coded currently) as a stream. How to run: npm start client serverStream.

Bidirectional streams

The client sends a stream of messages, the server sends that message back for each message the client sends. Both directions are sent in streams. How to run: npm start client biStream.