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I'm storing some data and I want to use it to plot a round-robin chart on a web page and I thought that RRDB4J could be a good fit. Unfortunately it’s not much documented, so I’m asking for advice.
I was thinking to use RRD4J+mongoDB for storing the data in round robin fashion, then query and show the data with Chart.js and https://github.com/adessoAG/wicked-charts and apache wicket.
Suggestions? Tutorials?
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I need to play audio stream and I'm looking for some library with support for multiple codecs and PCM(raw data). I also need to adjust the pace of audio. I'm aware of this solution however I don't know how to adjust the pace. I hoped I'll just import some library that will do all the things, but there are so many of them that I'm kind of lost. I was looking at Java Media Framework but it seems to be quite overkill. Thanks
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I would like to create CMS in JavaEE. I want use graph database. Which graph database is good for this purpose? What do you recommend? I seek free/open source graph database.
I can personally encourage you to use neo4j - http://neo4j.com/. It's new, quite simple, easy to use on Java and has quite good documentation. Although be aware of some minor issues (like an application crashing occasionaly when used heavily).
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Can you find a good tutorial or documentation about achieving a good pagination in a Google App Engine Objectify world?
I found some posts:
http://groups.google.com/group/objectify-appengine/browse_thread/thread/b640b5d377b620b4
But nothing seems to help me. Is there some sort of LIMIT query?
The post you linked to describes the correct way to do pagination: Using cursors. You can fetch using offsets and limits, but it's inefficient and should be avoided.
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what is the best Java library for manipulating graphs (specifically, for social network analysis)? I've seen Jung, but I was wondering if you knew anything better (I don't need to visualize networks, only computation).
Thank you
I've found jgrapht pretty useful - it has all the major algorithms (e.g. Bellman-Ford, ...)
neo4j is the choice
And here is a video
If you are aiming for high efficiency
http://grph.inria.fr/
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I have really enjoyed playing Robocode with my first robot. Now I want to make something a little more exciting. What's the best tutorial on making advanced robots?
Have you tried robowiki.net? They have a ton of resources including advanced topics like:
Pattern Matching
Clustering
Statistical partitioning
A number of the top bots in the Roborumble are also open source.
When you're ready, be sure to enter your robot in the rumble.