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From "Chris Douglas (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-8608) Add Configuration API for parsing time durations
Date Wed, 03 Oct 2012 21:37:09 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-8608?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chris Douglas updated HADOOP-8608:
----------------------------------

    Attachment: 8608-0.patch

{code}
public void setTimeDuration(String name, long value, TimeUnit unit);
public long getTimeDuration(String name, long defaultValue, TimeUnit unit);
{code}

It warns when the unit is unspecified and assumes whatever the caller requested.
                
> Add Configuration API for parsing time durations
> ------------------------------------------------
>
>                 Key: HADOOP-8608
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8608
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: conf
>    Affects Versions: 3.0.0
>            Reporter: Todd Lipcon
>         Attachments: 8608-0.patch
>
>
> Hadoop has a lot of configurations which specify durations or intervals of time. Unfortunately
these different configurations have little consistency in units - eg some are in milliseconds,
some in seconds, and some in minutes. This makes it difficult for users to configure, since
they have to always refer back to docs to remember the unit for each property.
> The proposed solution is to add an API like {{Configuration.getTimeDuration}} which allows
the user to specify the units with a postfix. For example, "10ms", "10s", "10m", "10h", or
even "10d". For backwards-compatibility, if the user does not specify a unit, the API can
specify the default unit, and warn the user that they should specify an explicit unit instead.

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