By default Kafka can only acknowledge all messages up to an offset; with kmq, it’s possible to acknowledge individual messages. How does this impact performance & latency? Read more on … Continue Reading →
Category Archives: Akka
akka-stream vs scalaz-stream
I recently published a comparison of akka-stream and scalaz-stream, with code examples (same problems implemented using both libraries) on SoftwareMill’s blog.
MacWire 1.0 is here!
A couple of days ago MacWire 1.0 was released! If you don’t yet know what MacWire is: a light-weight and non-intrusive Scala Dependency Injection library. In fact, it’s more of … Continue Reading →
Clustering reactmq with akka-cluster
In the last two posts on reactmq, I described how to write a reactive, persistent message queue. The queue has the following characteristics: there is a single broker storing the … Continue Reading →
Making the Reactive Queue durable with Akka Persistence
Some time ago I wrote how to implement a reactive message queue with Akka Streams. The queue supports streaming send and receive operations with back-pressure, but has one downside: all … Continue Reading →
Reactive Queue with Akka Reactive Streams
Update 15/09/2014: introduced API changes from akka-streams 0.7.Update 30/10/2014: introduced API changes from akka-streams 0.9.Update 15/12/2014: introduced API changes from akka-streams 1.0-M1. Reactive streams is a recently announced initiative to … Continue Reading →
Spray server in a Docker container
Docker is a pretty new, but very exciting project; with Docker you can create lightweight, self-sufficient containers with any application inside, and later run the containers on a variety of … Continue Reading →
Akka vs Storm
I was recently working a bit with Twitter’s Storm, and it got me wondering, how does it compare to another high-performance, concurrent-data-processing framework, Akka. What’s Akka and Storm? Let’s start … Continue Reading →
ElasticMQ 0.7.0: long polling, non-blocking implementation using Akka and Spray
ElasticMQ 0.7.0, a message queueing system with an actor-based Scala and Amazon SQS-compatible interfaces, was just released. It is a major rewrite, using Akka actors at the core and Spray … Continue Reading →
Typed ask for Akka
Akka is a great tool for writing distributed applications. One thing that always surprised me though is that while being based on Scala, which is a very type-safe language, the … Continue Reading →