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https://issues.apache.org/jira/browse/HDFS-9616?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bob Hansen updated HDFS-9616:
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Attachment: HDFS-9616.HDFS-8707.004.patch
New patch: fix spacing in event.h
To your question: since there is currently only one valid response for release
builds, we don't check the response at all. As soon as we have actionable
responses in release builds, we'll revisit the call sites to Do The Right Thing.
> libhdfs++ Add runtime hooks to allow a client application to add low level
> monitoring and tests.
> ------------------------------------------------------------------------------------------------
>
> Key: HDFS-9616
> URL: https://issues.apache.org/jira/browse/HDFS-9616
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: hdfs-client
> Reporter: James Clampffer
> Assignee: Bob Hansen
> Attachments: HDFS-9616.HDFS-8707.002.patch,
> HDFS-9616.HDFS-8707.003.patch, HDFS-9616.HDFS-8707.004.patch
>
>
> It would be nice to have a set of callable objects and corresponding event
> hooks in useful places that can be set by a client application at runtime.
> This is intended to provide a scalable mechanism for implementing counters
> (#retries, #namenode requests) or application specific testing e.g. simulate
> a dropped connection when the test system running the client application
> requests.
> Current implementation plan is a struct full of callbacks (std::functions)
> owned by the FileSystemImpl. A callback could be set (or left as a no-op)
> and when the code hits the corresponding event it will be invoked with a
> reference to the object (for context) and each method argument by reference.
> The callback returns a bool: true to continue execution or false to bail out
> of the calling method.
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