discourse/message_bus

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1662 stars · 129 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

MessageBus is a Ruby gem providing a reliable publish/subscribe messaging bus for server-to-server and server-to-web-client communication. It runs as Rack middleware, supporting polling, long-polling, and streaming across all common Ruby web servers.

Use cases

• publish and subscribe to messages between Ruby processes
• push real-time updates from a Rails or Sinatra app to browsers
• deliver targeted messages to specific users or client sessions
• replay message backlogs on a channel after reconnecting
• handle thousands of concurrent long-poll connections in Rack apps

When to choose

• you run a Rails, Sinatra, or Rack app and need reliable pub/sub messaging without a dedicated message broker
• you want real-time client updates using long-polling that works on standard Ruby web servers
• you need battle-tested infrastructure, as it powers Discourse in production at scale

When to avoid

• you need a full-featured distributed message queue like Kafka or RabbitMQ with guaranteed delivery semantics across services
• your stack is not Ruby/Rack based
• you prefer WebSocket-first solutions like Action Cable or AnyCable

Facets

library · maturity stable

message-queue middleware websocket http-server web-development backend ruby pub-sub long-polling rack-middleware real-time-messaging rubygem messaging real-time web-server rack

Member repositories

For agents

markdown · JSON · MCP: product_card(name="discourse/message_bus")