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https://issues.apache.org/jira/browse/MAPREDUCE-3970?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran updated MAPREDUCE-3970:
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Attachment: MAPREDUCE-3970.patch
* {{ServiceOperations}} class to start/stop services with preflight checking of
initial state. This is how callers should start and stop services -including
{{Service}} implementations that encapsulate other services.
* Tests, including some more in {{TestServiceLifecycle}}. That test formalises
the current behaviour of service operations (all subclass operations called
first).
> Add ServiceOperations class to aid working with Services
> --------------------------------------------------------
>
> Key: MAPREDUCE-3970
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3970
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Components: mrv2
> Affects Versions: 0.23.1, 0.24.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Attachments: MAPREDUCE-3970.patch
>
>
> Add Helper methods to move things through lifecycles. init->start is common,
> stop-if-service!=null another. Some static methods can execute these, and
> even call stop() if init() raises an exception. These could go into a class
> ServiceOps in the same package. These can be used by those services that wrap
> other services, and help manage more robust shutdowns.
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