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From "Aaron T. Myers (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8135) Add ByteBufferReadable interface to FSDataInputStream
Date Fri, 02 Mar 2012 23:18:54 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8135?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13221343#comment-13221343
] 

Aaron T. Myers commented on HADOOP-8135:
----------------------------------------

+1
                
> Add ByteBufferReadable interface to FSDataInputStream
> -----------------------------------------------------
>
>                 Key: HADOOP-8135
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8135
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: fs
>            Reporter: Henry Robinson
>            Assignee: Henry Robinson
>         Attachments: HADOOP-8135.2.patch, HADOOP-8135.patch
>
>
> To prepare for HDFS-2834, it's useful to add an interface to FSDataInputStream (and others
inside hdfs) that adds a read(ByteBuffer...) method as follows:
> {code}
>   /**
>    * Reads up to buf.remaining() bytes into buf. Callers should use
>    * buf.limit(..) to control the size of the desired read.
>    * 
>    * After the call, buf.position() should be unchanged, and therefore any data
>    * can be immediately read from buf.
>    * 
>    * @param buf
>    * @return - the number of bytes available to read from buf
>    * @throws IOException
>    */
>   public int read(ByteBuffer buf) throws IOException;
> {code}

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