Dear hakkers,

the first release candidate for Akka 2.3.0 is waiting just around the corner, 
and as the subject says, the Pipeline infrastructure in our shiny new Akka IO 
package, which was introduced in version 2.2.0, will be discontinued. The whole 
IO subsystem was marked “experimental” throughout the 2.2.x series and 
unfortunately this part of the experiment did not work out: the API is just too 
clunky and unintuitive.

We have something brewing which will be more than just a replacement for 
Pipelines: inspired by RxJava we are working on implementing Reactive Streams 
for Akka which will allow declarative transformation of streaming data of all 
kinds, with proper handling of back-pressure and of course fully typed. This 
will hopefully be available for preview in a few weeks and it will be included 
in the 2.4 milestones as soon as it is ready. Doing IO with this abstraction 
will be a breeze.

So instead of keeping Pipelines in a zombie state and luring people into their 
dead arms we decided to cull them early. For those of you who need some fresh 
Akka but also want to stay on Pipelines for the time being we will release a 
bugfix release 2.2.4 very soon as well.

Regards,


Dr. Roland Kuhn
Akka Tech Lead
Typesafe – Reactive apps on the JVM.
twitter: @rolandkuhn


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