I'm working on a part of my Akka application which must gracefully shutdown
when a shutdown hook has been detected.
The use case of my question is in case of deployment while the application
is making some tasks. In this specific case, we do want to delay the
deployment until my actors have not finished their tasks.
My application is composed by a ClusterGroup with a limited number of
routees (worker actors). To make a graceful shutdown, I like idea in
Basically what I want to do is :
1. Create a Reaper as in the article, collected dead souls
2. A shutdown hook has been detected, send a PoisonPill to each actors
in my actor system (I have all the elements for that)
3. When all worker actors has been killed with seeing PoisonPill
message, shutdown the actor system + the application (using System.exit or
My main problem is that I need a mechanism of Akka or Scala to wait (or to
timeout) the termination of my worker actors.
I'm using following code to detect that my application has been shutdown
from an external signal :
// let actors finished their work, blocking call ?
For reader of this question, I'm using Akka 2.5.7 and Scala 2.11.11.
Can I have advices for such use case ? I don't think that I'm only one to
make such things so I'm listening all ideas :)
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