Migration Guide 2.1.x to 2.2.x
The 2.2 release contains several structural changes that require some simple, mechanical source-level changes in client code.
Akka has in 2.2 been refactored to require
scala.collection.immutable data structures as much as possible,
this leads to fewer bugs and more opportunity for sharing data safely.
If you need to convert from Java to
scala.collection.immutable.Iterable you should use
and if you need to convert from Scala you can simply switch to using immutable collections yourself or use the
API changes to FSM and TestFSMRef
timerActive_? method has been deprecated in both the
FSM trait and the
class. You should now use the
isTimerActive method instead. The old method will remain
throughout 2.2.x. It will be removed in Akka 2.3.