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https://issues.apache.org/jira/browse/OOZIE-2406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15924920#comment-15924920
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Robert Kanter commented on OOZIE-2406:
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Someone was suggesting the [d3|https://d3js.org/] Javascript library. It looks
like it can do a lot of neat things and seemly widely used (so shouldn't go
extinct).
Here's some examples that would be relevant to us:
http://bl.ocks.org/d3noob/5141278
http://bl.ocks.org/mbostock/2706022
https://tylercipriani.com/blog/2016/03/21/Visualizing-Git-Merkle-DAG-with-D3.js/
Looks like it's BSD license, so that should be okay.
> Completely rewrite GraphGenerator code
> --------------------------------------
>
> Key: OOZIE-2406
> URL: https://issues.apache.org/jira/browse/OOZIE-2406
> Project: Oozie
> Issue Type: New Feature
> Affects Versions: 4.2.0
> Reporter: Robert Kanter
>
> The Web UI currently generates a graph of the workflow DAG as a png image
> that it can show to the user ({{GraphGenerator}} class). Unfortunately,
> there are a number of downsides to the current implementation:
> # The image is generated server-side, which doesn't scale well and eats up
> lots of memory
> #- To help combat this issue, we only generate graphs for workflows with less
> than 25 nodes and we disabled the refresh button in the UI
> # It's slow
> # It uses a library ({{net.sf.jung}} from http://jung.sourceforge.net), which
> hasn't been updated since 2010.
> #- This library also has a dependency on a fork of Commons-Collections
> ({{net.sourceforge.collections}} from
> http://sourceforge.net/projects/collections/), which similarly hasn't been
> updated since 2010. This is a problem because we can't update
> Commons-Collections when there are security concerns such as COLLECTIONS-580
> (though Oozie is *not* susceptible to this attack).
> It would be good to do a complete rewrite, using a different library and
> remove Jung and the Commons-Collections fork. Whatever we choose, it should
> an svg which will draw the image on the browser.
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