The Web Semantic

“show the latest ….” is a common prefix to user stories these days.  Others have noted the same and given this symptom a moniker; ”The real time web“.  Typically we just throw things into a table with an indexed timestamp column and query accordingly.

In jo4neo, finding the most recent additions requires two simple steps:

1. annotation your type with @neo(recency=true)
2. use the ObjectGraph.getMostRecent() method to retrieve the latest inserts.

In this small example, we’re indicating to jo4neo that we’d like it to remember our “Post” inserts in most recent order. » Read the rest of this entry «

Graphs in and of themselves are not self indexing like relational databases, however, you can construct indexes via strong relationships between the nodes of interest.  The pattern I’ll be discussing in this post maps time (year, month, day, hour) into a graph format as nodes and edges.  Once time, or some subset, is represented as a graph we can then associate events or moment intervals as nodes related to a particular hour of a particular day, month and year.  ( This post is based on a full example here.) » Read the rest of this entry «

neoblog is a simple application I built to test drive jo4neo.  You are welcome to browse the code here for details not covered in this post. It demonstrates the feasibility of utilizing view tier objects to persist graph relationships.

neoblog with 3 posts

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Roles and Users is a classic domain model well suited to representation as a directed graph. The neo4j team has provided us with a good summary of how to implement this pattern using neo4j here . Utilizing jo4neo we can also solve this problem via a combination of the neo graph database and simple java objects.  The code and maven build for this example are posted here.  I encourage you to run the example and browse the code.  We’ll need two domain classes, » Read the rest of this entry «

I’ve recently returned from the Øredev developer’s conference in Malmo, Sweden where I had the privilege of  sharing knowledge with a very eclectic group of technologists . In addition to existing trends such as language agnosticism on the JVM, Agile, and mobile proliferation I noticed 3 emerging trends that stood out. Some of the concepts will be familiar to you and while they are not drastic departures from the past, they are significant and becoming more prominent and recognizable as we near the end of 2009.

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