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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6223) New improved FileSystem interface for those implementing new files systems.
Date Tue, 01 Sep 2009 21:41:34 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6223?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12750121#action_12750121
] 

Doug Cutting commented on HADOOP-6223:
--------------------------------------

> one could deprecate parts of FileSystem and them delete or make-package private its methods.
> It is simpler to simply create a new class called AbstractFileSystem

I don't see how this is simpler.  It breaks existing users and implementations just to have
a different name.  If we want to encourage folks to use the FileContext API in place of the
FileSystem API directly then we can deprecate and subsequently remove utility methods in FileSystem
that make it easier to use, so that it becomes mostly a set of abstract methods. Renaming
it seems gratuitously incompatible.

> New improved FileSystem interface for those implementing new files systems.
> ---------------------------------------------------------------------------
>
>                 Key: HADOOP-6223
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6223
>             Project: Hadoop Common
>          Issue Type: Sub-task
>            Reporter: Sanjay Radia
>
> The FileContext API (HADOOP-4952) provides an improved interface for the application
writer.
> This lets us simplify the FileSystem API since it will no longer need to deal with notions
of default filesystem [ / ],  wd, and config
> defaults for blocksize, replication factor etc. Further it will not need the many overloaded
methods for create() and open() since
> the FileContext API provides that convenience.
> The FileSystem API can be simplified and can now be restricted to those implementing
new file systems.
> This jira proposes that we create new file system API,  and deprecate FileSystem API
after a few releases.

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