This article provides a practical introduction to graph databases with a focus on the Groovy ecosystem. It explores Grails GORM support for Neo4j as well as query comparisons between the Neo4j Cypher language, SQL and the Gremlin graph DSL.
This article originally appeared in the May 2013 issue of GroovyMag.
A few months back I was working on a Grails & Solr project – so it was a prime opportunity to answer my call to action (see the Solr plugin section of ‘Using Lucene in Grails’) and upgrade the Solr plugin to 3.5.0.
This was done in two phases, the first was to update the SolrJ client as required by the project and then once the project was completed to update the bundled Solr server with the aim of contributing the update back.
TLDR: Grails Solr Plugin using
3.5.0 3.6.0 available from https://github.com/rbramley/grails-solr-plugin pending https://github.com/mbrevoort/grails-solr-plugin/pull/2
Posted in Notes, Search
Tagged grails, solr
Apache Mahout is a scalable machine learning framework that can be used to create intelligent applications. In this article we’ll see how Mahout can be used to create personalised recommendations within a Grails application.
This article originally appeared in the February 2012 edition of GroovyMag.
Apache Lucene is the leading open source search engine and is used in many businesses, projects and products. Lucene has sub-projects which provide additional functionality such as the Nutch web crawler and the Solr search service. This article gives an introduction to Lucene, a tutorial on three Grails Lucene plugins and a comparison between them.
This article originally appeared in the September 2011 edition of GroovyMag.
This is a quick how-to post on getting Change Risk Anti-Patterns statistics for your Grails code.
Firstly thanks to Jeff Winkler for bringing the new GMetrics v0.5 CrapMetric to my attention and thanks to Chris Mair for his great work on GMetrics (and Codenarc).
Browser Push is the collective term for techniques that allow a server to send asynchronous data updates in near real time to a browser. This article provides an overview of browser push and then provides a sample of Grails usage by extending the example project from the ‘Using JMS in Grails‘ article in the June 2011 edition to send event-driven updates to the browser.
This article originally appeared in the July 2011 edition of GroovyMag.
The Java Message Service (JMS) API is one of the cornerstones of the Java Enterprise Edition that allows applications to reliably communicate using asynchronous messages sent via a message broker. This article provides an introduction to JMS, the JMS support in the Spring Framework and then provides practical examples of usage within Grails using the JMS plugin.
This article originally appeared in the June 2011 edition of GroovyMag.