How is this "SNS and SQS rolled into one"? What's the SQS-like part in this? This seems very similar to SNS, with some additional flexibility around event filtering, and the added bonus of various SaaS integrations that can replace traditional webhooks.

Not a ton of outside integrations, but this library creates and maintains an esb using sqs and sns with just a few annotations in java. Uses json as the message and maps to pojo in the application.

https://bitbucket.org/pythagorasio/java-message-bus/src/mast...

Its also published on maven central. Io.pythagoras.messagebus

Disclosure: I’m the primary author.