GitHub user andralungu opened a pull request:
https://github.com/apache/flink/pull/801
[FLINK-2150][gelly] Added library method for assigning unique labels to
vertices
This PR adds a library method that assigns unique labels to vertices.
The following facts are used:
* a map function generates an n-bit(n - number of parallel tasks) ID based
on its own index
* with each record, a counter c is increased
* the unique label is then produced by shifting the counter c by the n-bit
mapper ID
Thanks @fhueske for the useful tips!
And thanks @rmetzger for the nice stackoverflow answer
(http://stackoverflow.com/questions/30596556/zipwithindex-on-apache-flink)
If you guys find some spare minutes, you are more than welcome to have a
look at what I did here. If not, we'll just let @vasia do what she does best :)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/andralungu/flink generateUniqueIds
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/801.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #801
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commit d655187a9626be6aca734fdbe035de62e3ead839
Author: andralungu <lungu.an...@gmail.com>
Date: 2015-06-07T13:27:24Z
[FLINK-2150][gelly] Added library method for assigning unique labels to
vertcies
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