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From "Aaron Kimball (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6420) String-to-String Maps should be embeddable in Configuration
Date Wed, 16 Dec 2009 20:42:18 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12791573#action_12791573

Aaron Kimball commented on HADOOP-6420:

Fair point. I think that the semantics of (A) are clearer. I will modify MAPREDUCE-1126 to
use external sentinel values.

As for your other v8 issues

1) Good call on {{equals()}}
2) {{Configuration.this.get()}} will use deprecation-resolution on the provided key. Deprecation-resolution
is handled at the map key (prefix) level, not on individual subkeys within the map. So those
should not call {{get()}}.
3) Yes.
4) This can be added.
5) I don't see what you mean. If {{Configuration.this.get()}} is used or the current {{Configuration.this.getProps()}},
you still need a {{Configuration.this}} associated with it, so you can't use a static inner
class. You could conceivably hold an explicit reference to the {{Configuration}} object, but
given that the implicit reference is the whole point of a non-static inner class, I don't
see what using a static class buys us.

> String-to-String Maps should be embeddable in Configuration
> -----------------------------------------------------------
>                 Key: HADOOP-6420
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6420
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: conf
>            Reporter: Aaron Kimball
>            Assignee: Aaron Kimball
>         Attachments: HADOOP-6420.2.patch, HADOOP-6420.3.patch, HADOOP-6420.4.patch, HADOOP-6420.5.patch,
HADOOP-6420.6.patch, HADOOP-6420.7.patch, HADOOP-6420.8.patch, HADOOP-6420.patch
> Per MAPREDUCE-1126, we need to be able to take a map of (key, value) pairs and embed
that inside a Configuration object.

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