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https://issues.apache.org/jira/browse/HDDS-25?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16466524#comment-16466524
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Anu Engineer commented on HDDS-25:
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[~elek] Thanks for posting the draft. It looks good to me. some questions.
# Nit: The {{EventExecutor Interface}} some functions have the comments
swapped. You might want to fix them later.
# {EventPublisher#fireEvent }-- ? Does it have an error interface ? or should
we use exceptions ?
# Do we need a executor per event type ? or just have a thread pool ?
# Suppose, I have to get a respose for an Event that I have queued, does it
make sense to support a future interface – or is that mute ? Should we have an
Event ID – for the same purpose if we want to indicate this is in response to
that command.
[~msingh], [~nandakumar131] Please share your thoughts too.
> Simple async event processing for SCM
> -------------------------------------
>
> Key: HDDS-25
> URL: https://issues.apache.org/jira/browse/HDDS-25
> Project: Hadoop Distributed Data Store
> Issue Type: Improvement
> Components: SCM
> Reporter: Elek, Marton
> Assignee: Elek, Marton
> Priority: Major
> Fix For: 0.2.1
>
> Attachments: HDDS-25.001.patch
>
>
> For implementing all the SCM status changes we need a simple async event
> processing.
> Our use-case is very similar to an actor based system: we would like to
> communicate with full asny event/messages, process the different events on
> different threads, ...
> But a full Actor framework (such as Akka) would be overkill for this use
> case. We don't need distributed actor systems, actor hierarchy or complex
> resiliency.
> As a first approach we can use a very simple system where a common EventQueue
> entry point could route events to the async event handlers
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