Hermes

Hermes is a tiny MQTT compatible broker written in Go.

The goals of the project are as below

• Easy to compile, and run
• Tiny footprint
• Extensible
• Adhering to standards

Current features

This is in no way ready to be consumed. This is a project which arose out of my boredom during COVID-19, and general issues whilst working with other production ready brokers such as ActiveMQ, Solace, NATS etc.

• [x] CONNECT
• [x] PUBLISH, PUBACK
• [x] SUBSCRIBE, SUBACK
• [x] DISCONNECT
• [x] Persistent sessions
• [x] QoS 2 support
• [x] Offline messages
• [ ] Wildcard subscriptions
• [ ] Shared Subscriptions
• [ ] Extended authentication
• [ ] MQTT over WebSocket
• [ ] Clustering

Usage

Any compatible MQTT client library can be used to interact with the broker

• Java (eclipse/paho.mqtt.java)
• Go (eclipse/paho.golang)
• Other clients can be found here

Planned features

The following are some features from the top of my head which I will work on

• Support for more transports such as WebSocket, gRPC, Rsocket(?)
• Support for clustering
• Authentication & extensible middleware
• Message Persistence

Contributing

Fork it, give it a spin, and let me know!