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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7549) Use JDK ServiceLoader mechanism to find FileSystem implementations
Date Thu, 01 Sep 2011 18:07:09 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13095483#comment-13095483
] 

Owen O'Malley commented on HADOOP-7549:
---------------------------------------

Sorry, I wasn't clear. Yes, part of using ServiceLoader to load these impls is that we need
to make the schemes for each FileSystem unique. I was proposing that we change

"file" scheme to point to RawLocalFileSystem
"checksum" scheme to point to LocalFileSystem


> Use JDK ServiceLoader mechanism to find FileSystem implementations
> ------------------------------------------------------------------
>
>                 Key: HADOOP-7549
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7549
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs
>    Affects Versions: 0.23.0
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>             Fix For: 0.23.0
>
>         Attachments: HADOOP-7549v1.patch
>
>
> Currently configuring FileSystem implementations must be done by declaring the FileSystem
class in the Hadoop configuration files (core-default.xml, ...).
> Using JDK ServiceLoader mechanism this configuration step can be avoided. Adding the
JAR file with the additional FileSystem implementation would suffice. 
> This is similar to what is being proposed for compression codecs (HADOOP-7350).

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