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From "Robert Joseph Evans (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-237) Refreshing the RM page forgets how many rows I had in my Datatables
Date Thu, 28 Feb 2013 22:07:13 GMT

    [ https://issues.apache.org/jira/browse/YARN-237?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13589976#comment-13589976

Robert Joseph Evans commented on YARN-237:

The change looks more or less OK to me.  I am not thrilled about how we modify the data table's
init string by looking for the first '{', but I think it is OK.  I just have a few concerns,
and most if it deals with my lack of knowledge about jQuery and localStorage.  I know that
localStorage is not supported on all browsers.  I also know that localStorage can throw a
QUOTA_EXCEEDED exception.  What happens when we run into these situations?  Will the page
stop working or will jQuery degrade gracefully and simply not allow us to save the data. 
What about if the data stored in the key is not what we expect.  Will jQuery make the page
unusable.  We currently have tables with the same name on different pages.  If they are not
kept in sync there could be some issues with the data that is saved.

Which brings up another point I am also a bit concerned about the key we are using as part
of the localStorage.  The key is the id of the data table.  I would prefer it if we could
some how make it obvious that these values are for a data table, and not some other "apps"
> Refreshing the RM page forgets how many rows I had in my Datatables
> -------------------------------------------------------------------
>                 Key: YARN-237
>                 URL: https://issues.apache.org/jira/browse/YARN-237
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: resourcemanager
>    Affects Versions: 2.0.2-alpha, 0.23.4, 3.0.0
>            Reporter: Ravi Prakash
>            Assignee: jian he
>              Labels: usability
>         Attachments: YARN-237.patch
> If I choose a 100 rows, and then refresh the page, DataTables goes back to showing me
20 rows.
> This user preference should be stored in a cookie.

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