gRPC Messenger

A super lightweight gRPC messaging system between microservices.

Why gRPC?

• gRPC is ~6x faster than REST API (gRPC vs REST speed comparison)
• gRPC serializes using Protocol Buffers which send data as binary; REST usually uses JSON or XML which use text based data.
• gRPC supports bidirectional streaming; REST uses request-response.
• gRPC communicates using HTTP 2 which is faster reduces network delay through the use of multiplexing.

What is gRPC

Getting started

• Messages are not saved
• Topics are created by either publishing or subscribing
• Subscribers will not receive messages sent to a topic prior to subscribing

broker_service

Service broker which receives messages from publishers and distributes messages to subscribers.

publisher_service

Example for placing code in a service pushing messages to subscribers.

subscribe_service

Example for listening for messages.

Contributing to this repo

Generate protobuf files

Run this when editing the .proto files.

# Delete __pycache__ directory if it exists.
rm -r protos/__pycache__

# Delete existing protobuf files if they exist.
rm -r protos/*_pb2*

# Generate new protobuf files.
python3 -m grpc_tools.protoc -I. --python_out=. --grpc_python_out=. protos/*