Thanks for answering Anders, your answers were very helpful.
for #1 (starting in a known state). I was more asking how do I start
with a 'fresh/clean' journal with no history. I can manually remove
the files, but I was hoping there was something in the test-kit I
could do which will achieve this so I can do the tests in my IDE.
On Mon, Jan 5, 2015 at 6:55 AM, Anders Båtstrand <ander...@gmail.com> wrote:
> I have only been using Akka Persistence for a few months, but this is my
> suggestions:
>
> 1. I always start empty, but that is possibly not what you want. Maybe a
> file based storage, and you copy the files in place right before you start
> the Akka system?
>
> 2. I have solved the same problem by letting the parent actor be responsible
> for killing the children. That is: The child receives an event that it
> calculates should result in it's own destruction, and it then calls the
> parent, which then kills it (and updates a map over actors). In my case the
> parent is also delegating messages to the child, so this way I am sure not
> to send messages to any actor that is on the way down (that is, before the
> parent received the Terminated-message).
>
> 3. I am not sure i understood the question. I have CreateChild and KillChild
> events persistent from the parent actor. During recovery, it makes a map
> over actors it should create or not, and only creates then
> onRecoveryComplete. That way I do not create actors I would immediatly kill.
>
> Hope this was helpful!
>
> Best regards,
>
> Anders Båtstrand
>
> kl. 19:20:30 UTC+1 fredag 2. januar 2015 skrev Ian Holsman følgende:
>>
>> Hi.
>>
>> I'm building a 'toy' game that makes uses of akka-persistence, in order to
>> learn it.
>>
>> in a nutshell the game is 1000's of people/bots create villages, they act
>> independently of each other, and generally pass messages to each other to
>> chat/fight and all that good stuff.
>>
>> Where I am having problems are:
>>
>> 1. how do I initialize the persistence system at the start of testing so I
>> am in a 'known state' when I start.
>>
>> 2. how I assign IDs (persistanceId) to actors.
>> Ideally I would use a map reference for while the villages exist, and be
>> able to re-use them if a new village is created. but the problem is it finds
>> the old village, and replays all the events (including the death event which
>> kills it).
>> I don't mind re-using a old actor, but i'd like to stop it (ie poisonpill)
>> when it isn't active.
>>
>> It seems like they need to be unique for the life of the system, and to do
>> so I would need a counter in place or GUIDs. but then I would need to keep
>> track of the Map reference/GUID mapping meaning my code would need to first
>> talk to the mapping holder, and then to the village itself (2 messages, 1
>> sync) which seems like non-ideal. (as opposed to context.actorselection("XYZ
>> map-reference") ! message which I guess is still 2 messages under the
>> covers, 1 sync too)
>>
>> 3. the recovery log only seems to 'start' when I bring up the actor.
>> Is there a way to know which actors are currently 'active' and just let
>> Akka start them all up, instead of me keeping a list/map of 'active'
>> villages, and manually restarting them.
>>
>>
>>
>> Thanks ..
>>
>> Ian.
>
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Ian Holsman
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PH: + 61-3-9028 8133 / +1-(425) 998-7083
--
>>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>>>>>>> Check the FAQ:
>>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
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