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https://issues.apache.org/jira/browse/HBASE-21246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16646943#comment-16646943
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stack commented on HBASE-21246:
-------------------------------

bq. You have a suggestion?

I was commenting on the fact that we have a String (one 'key') to lookup 
another 'key' (WALIdentity), not on the class naming; i.e. a key to a key to an 
artifact seems like a tier too many.

I can create a WALIdentity and it has no associated WAL instance? So we'd build 
handling for case where we are passed a WALIdentity with no associated WAL? So 
lots of NoSuchWALIDExceptions on the API?

> Introduce WALIdentity interface
> -------------------------------
>
>                 Key: HBASE-21246
>                 URL: https://issues.apache.org/jira/browse/HBASE-21246
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>            Priority: Major
>             Fix For: HBASE-20952
>
>         Attachments: 21246.003.patch, 21246.HBASE-20952.001.patch, 
> 21246.HBASE-20952.002.patch, 21246.HBASE-20952.004.patch, 
> 21246.HBASE-20952.005.patch
>
>
> We are introducing WALIdentity interface so that the WAL representation can 
> be decoupled from distributed filesystem.
> The interface provides getName method whose return value can represent 
> filename in distributed filesystem environment or, the name of the stream 
> when the WAL is backed by log stream.



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