Tag Archives: java

Mar 13 2012
1 Comment
Gremlin, Java

JUNG in Neo4j – Part 1

It’s nice to have an arsenal. In the world of graph databases, one such stock room is the Java Universal Network/Graph Framework(JUNG) which contains a cache of algorithms from graph theory, data mining, and social network analysis, such as routines for clustering, decomposition, optimization, random graph generation, statistical analysis, and calculation of network distances, flows, and importance measures (centrality, PageRank, HITS, etc.).

We can use JUNG via the Blueprints ouplementation and access it via Gremlin. It doesn’t come pre-packaged with Neo4j, but Michael Hunger playing the role of “Tank” and was able to load up our stock room with a few key strokes.
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Feb 28 2012
32 Comments
Java

Batch Importer – Part 2

If you’ve been following along, we got Michael’s Batch Importer, compiled it, created some test data, ran it and saw millions of nodes and relationships loaded into Neo4j.

So now we’re ready for our own data. I am going to show you how to get data from a Relational Database like PostgreSQL into a format we can use. If you’re using SQL Server, MySQL, Oracle, etc, the directions will be slightly different, but you’ll get the picture.
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Feb 28 2012
46 Comments
Java

Batch Importer – Part 1

Data is everywhere… all around us, but sometimes the medium it is stored in can be a problem when analyzing it. Chances are you have a ton of data sitting around in a relational database in your current application… or you have begged, borrowed or scraped to get the data from somewhere and now you want to use Neo4j to find how this data is related.

Michael Hunger wrote a batch importer to load csv data quickly, but for some reason it hasn’t received a lot of love. We’re going to change that today and I’m going to walk you through getting your data out of tables and into nodes and edges.

Let’s clone the project and jump in.
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Feb 16 2012
5 Comments
Java

Importing Wikipedia into Neo4j with Graphipedia

Wouldn’t it be cool to import Wikipedia into Neo4j?

Mirko Nasato thought so, and built graphipedia using the batch importer that does just that.

It’s written in Java, so if you’re a pure ruby guy, I’ll walk you through the steps.

Let’s clone the project and jump in.

git clone git://github.com/mirkonasato/graphipedia.git
cd graphipedia

If you look in here you’ll see a pom.xml file which means you’ll need to download Maven and build the project.

sudo apt-get install maven2
mvn install

You’ll see a bunch of stuff flying by, that’s just the dependencies being downloaded. At the end you should see this:
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