Different approach than in classic AtLeastOnceDelivery because I would like: * support flow control, with a work pulling approach * be possible to use with or without persistence (without it may loose messages if producer node crashes) * detect lost messages on the consumer side and let that drive resends, instead of aggressively resending from producer side * deliver messages in order and deduplicate resent messages * have an efficient protocol for acknowledgments over the network (not ack each message), but still have a simple one-by-one protocol for the end user * support 3 use cases (building blocks) * point-to-point * work pulling * sharding * optional durable queue, with one event sourced implementation * protobuf serialization * ApiMayChange * reference docs and examples * api docs * doc example code missing so far |
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Akka 

We believe that writing correct concurrent & distributed, resilient and elastic applications is too hard. Most of the time it's because we are using the wrong tools and the wrong level of abstraction.
Akka is here to change that.
Using the Actor Model we raise the abstraction level and provide a better platform to build correct concurrent and scalable applications. This model is a perfect match for the principles laid out in the Reactive Manifesto.
For resilience, we adopt the "Let it crash" model which the telecom industry has used with great success to build applications that self-heal and systems that never stop.
Actors also provide the abstraction for transparent distribution and the basis for truly scalable and fault-tolerant applications.
Learn more at akka.io.
Reference Documentation
The reference documentation is available at doc.akka.io, for Scala and Java.
Community
You can join these groups and chats to discuss and ask Akka related questions:
- Forums: discuss.akka.io
- Chat room about using Akka:
- Issue tracker:
In addition to that, you may enjoy following:
- The news section of the page, which is updated whenever a new version is released
- The Akka Team Blog
- @akkateam on Twitter
- Questions tagged #akka on StackOverflow
- Projects built with Akka:
Contributing
Contributions are very welcome!
If you see an issue that you'd like to see fixed, the best way to make it happen is to help out by submitting a pull request implementing it.
Refer to the CONTRIBUTING.md file for more details about the workflow, and general hints on how to prepare your pull request. You can also ask for clarifications or guidance in GitHub issues directly, or in the akka/dev chat if a more real time communication would be of benefit.
A chat room is available for all questions related to developing and contributing to Akka:
License
Akka is Open Source and available under the Apache 2 License.