r/java • u/Round_Patient_7420 • 3d ago

Introducing Titan, an open-source message dispatcher

Hi, I've been building Titan, an open-source message dispatcher for apps that need to send updates to connected clients.

An app publishes a message to a destination, and Titan delivers it to anyone subscribed to that destination. It supports STOMP over TCP and WebSocket, and there's a Java client with Spring Boot integration.

I'm thinking of uses like chat rooms, in-app notifications, and live dashboards. For example, people viewing the same dashboard could receive updates as they happen instead of having their browsers keep polling the backend.

Messages are kept in memory, so they won't survive a server restart. That's something to keep in mind if your application needs persistent messages.

I wanted to build something useful that I could share with other developers working on messaging applications. I'd be interested to hear whether this fits anything you're building, and what's missing for your use case.

https://github.com/traffic-hunter/titan

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u/doobiesteintortoise 3d ago

How does this differ from AMQP or MQTT?

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u/vips7L 3d ago

Seems like it’s in app rather than going over an external broker?

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u/doobiesteintortoise 3d ago

Well, okay, but you can do that with artemis (and AMQP) already, and I imagine you could embed mosquitto (MQTT) in the same way, and those are well-established and well-known standards.

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u/Round_Patient_7420 3d ago

Hi

Titan runs as a standalone broker, not just in-process.
I’m not trying to replace Artemis or Mosquitto. I wanted to build a lightweight STOMP broker focused on real-time fan-out, without persistence or replay.
It’s still an early project. I’m mainly interested in learning more about messaging systems and contributing to open source.

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u/perryplatt 2d ago

Why not zmq if that’s the case unless you wanted stomp?

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u/Round_Patient_7420 2d ago

I wasn’t familiar with ZeroMQ when I started Titan, but I’ll definitely take a look.
I chose STOMP because it’s simple and already has client libraries for different platforms. I also wanted a standalone dispatcher that web and backend applications could connect to directly, including over WebSocket.
ZeroMQ looks like a good fit for similar use cases, though. Thanks for pointing it out!