processor aware of recovery

[HP]

Hi guys, I was wondering if the processor receives any message notifying it of the completion of recovery.  In cases where a Message(...) is received and responds to the sender, on recovery, the response ends up in deadletter, if the processor was aware it was still recovering, it could by-pass the respond logic as desired.

-Hiral

[Martin Krasser]

Hi Hiral,

this is currently not the case. As a workaround you could use

sender != system.deadLetters

for conditional replies.

akka-persistence might help you in the future:

- processors are aware of recovery status
- senders of replayed messages are restored from journal (and can be resolved, if needed)

I plan to migrate the HBase journal to akka-persistence soon - currently working on a journal provider API. The migrated journal will be offered as separate jar in the eligosource Maven repo i.e. it won't be part of Akka persistence. Hope this will allow you a transition to akka-persistence.

Cheers,
Martin

On 27.09.13 20:22, HP wrote:

Hi guys, I was wondering if the processor receives any message notifying it of the completion of recovery.  In cases where a Message(...) is received and responds to the sender, on recovery, the response ends up in deadletter, if the processor was aware it was still recovering, it could by-pass the respond logic as desired.

-Hiral

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[HP]

Thanks Martin, we'll use the workaround.  We probably won't be able to move to the snapshot version of Akka 2.3 so may not be able to use the akka-persistence module right away. 

[Martin Krasser]

A first Akka 2.3 milestone should be out in a few weeks I think.