What is Nats?

Nats is a message broker where it relays messages from clients to clients in realtime It can also broadcast messages to everyone.

Basic concept

1. Client A connects to nats-server.
2. Client B connects to nats-server.
   1. Client A subcribes(listens) to Subject_X(channel/room).
   2. Client B publishes(writes) a message to Subject_X(channel/room).
   3. Client A will receive message published by Client B.

Use cases

Anything that requires realtime messaging:

• Live chat
• Live notification
• Live stock price quote

Selling point

It is freaking small. Perfect for embedded devices.

• Nats-server is just 1 file: 16MB.