# Messaging

`messaging` package defines `Publisher`, `Subscriber` and an aggregate `Pubsub` interface. 

`Subscriber` interface defines methods used to subscribe to a message broker such as MQTT or NATS or RabbitMQ. 

`Publisher` interface defines methods used to publish messages to a message broker such as MQTT or NATS or RabbitMQ.

`Pubsub` interface is composed of `Publisher` and `Subscriber` interface and can be used to send messages to as well as to receive messages from a message broker.