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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2634) Deprecate exists() and isDir() to simplify ClientProtocol.
Date Thu, 17 Jan 2008 21:58:34 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2634?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12560101#action_12560101
] 

Doug Cutting commented on HADOOP-2634:
--------------------------------------

Hairong has addressed these inconsistencies in HADOOP-2566.

Yes, the implementation of exists() in terms of getFileStatus() would be simple.  However
it is considered bad style to use exceptions for normal control flow, and exists() returning
false is a normal condition.  We might just have to live with that...


> Deprecate exists() and isDir() to simplify ClientProtocol.
> ----------------------------------------------------------
>
>                 Key: HADOOP-2634
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2634
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: dfs
>    Affects Versions: 0.15.0
>            Reporter: Konstantin Shvachko
>
> ClientProtocol can be simplified by removing two methods
> {code}
> public boolean exists(String src) throws IOException;
> public boolean isDir(String src) throws IOException;
> {code}
> This is a redundant api, which can be implemented in DFSClient as convenience methods
using
> {code}
> public DFSFileInfo getFileInfo(String src) throws IOException;
> {code}
> Note that we already deprecated several Filesystem method and advised to use getFileStatus()
instead.
> Should we deprecate them in 0.16?

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