Go-gRPC-Demo

Why?

In a REST or GraphQL architecture we have
Client sending request
Server giving response

But this process is

Slow

Synchronous

Not Scalable

How?

How to make the client server intercation Scalable?

For that we use Remote Procedure Calls (RPC)

RPC directly calls functions from client to server Instead of JSON, we use protobuf files Here, payload size is small and accelerates communication

Client Server communication can happen via Streaming (sequences of mesages)
Stream is continous flow of data
Its asynchronous
Extremely scalable
Usecase: MICROSERVICES!, Blockchains

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There are mainly 4 types of communications in GRPC

1. Unary API

   Regular request-response

2. Server Streaming

   Client sends a request to server

   Server sends a strea of data to client

3. Client Streaming

   Client sends a stream of data to server

   Server provides a siple response to client

4. Bi-Directional Streaming

   Both client and server can communicate via streaming.

   And they can do this parallely,

   Not like request response wehre client sneds first and then server gives response - not like this.

   Its like a two way-traffic

   Even though its a stream, not a queue, sequence of messages is preserved

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To Run the project

Install the dependencies

go mod tidy

Run the server

go run server/main.go

Run the client

go run client/main.go