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From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3481) Refactor HttpFS handling of JAX-RS query string parameters
Date Tue, 26 Jun 2012 18:41:44 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3481?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13401594#comment-13401594
] 

Alejandro Abdelnur commented on HDFS-3481:
------------------------------------------

On the warning:

Offending source:

{code}
...
  private static final Map<Enum, Class<Param<?>>[]> PARAMS_DEF =
    new HashMap<Enum, Class<Param<?>>[]>();

  static {
    PARAMS_DEF.put(Operation.OPEN,
      new Class[]{DoAsParam.class, OffsetParam.class, LenParam.class});
...
{code}

{code}
[WARNING] /home/jenkins/jenkins-slave/workspace/PreCommit-HDFS-Build/trunk/hadoop-hdfs-project/hadoop-hdfs-httpfs/src/main/java/org/apache/hadoop/fs/http/server/HttpFSParametersProvider.java:[48,6]
[unchecked] unchecked conversion
found   : java.lang.Class[]
required: java.lang.Class<org.apache.hadoop.lib.wsrs.Param<?>>[]
{code}

Regarding the duplication of Parameter class, I think the reason for the duplication is that
Webhdfs is tightly coupled with HDFS code (within the same maven module) while HttpFS is decoupled
and could (in theory) be used without HDFS itself in the classpath. As part of HDFS-2645 all
this dup code would go away.

                
> Refactor HttpFS handling of JAX-RS query string parameters
> ----------------------------------------------------------
>
>                 Key: HDFS-3481
>                 URL: https://issues.apache.org/jira/browse/HDFS-3481
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 2.0.1-alpha
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>             Fix For: 2.0.1-alpha
>
>         Attachments: HDFS-3481.patch, HDFS-3481.patch, HDFS-3481.patch
>
>
> Explicit parameters in the HttpFSServer became quite messy as they are the union of all
possible parameters for all operations.

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