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From Dhruba Borthakur <dhr...@gmail.com>
Subject Re: Private, LimitedPrivate and contrib modules
Date Thu, 05 Nov 2009 20:15:22 GMT
Hi sanjay,

Most of the contrib modules are in the same package as their containers. For
example, the fair share scheduler is in contrib but its package name is
org.apache.hadoop.mapred. Doesn't this mean that the fair-share scheduler
code can use LimitedPrivate methods from org.apache.hadoop.mapred package?

thanks,
dhruba

On Thu, Nov 5, 2009 at 11:05 AM, Sanjay Radia <sradia@yahoo-inc.com> wrote:

>
> Sorry for the late reply .. I missed in in my inbox.
>
> On Sep 18, 2009, at 1:29 PM, Tom White wrote:
>
>  I'm trying to better understand the meaning of the annotations defined
>> in org.apache.hadoop.classification.InterfaceAudience.
>>
>> 1. Private is documented as being "Intended for use only within Hadoop
>> itself". Does this mean the whole Hadoop project, or the subproject
>> that the annotated element is in? (Or another scope?)
>>
>>
>
> Private means private to the subproject (ie private to HDFS, to MR, etc).
> We should update the doc to clarify this.
>
>>
>> 2. Is a contrib module considered to be a part of the subproject? For
>> example, if something is marked as LimitedPrivate in Common say, with
>> intended audience MapReduce, can MapReduce contrib modules use it?
>>
>>
> I believe the answer should be no.
>
>> Or, assuming the second meaning for 1, if something is marked as
>> Private in MapReduce, can MapReduce contrib modules use it?
>>
>>
> Again I believe the answer should be no.
>
> Any concrete examples that we can  use to examine/discuss this further
>
>>
>> Thanks,
>> Tom
>>
>>
>


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