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Building a Manufacturing Service Bus (MSB) with WSO2 ESB

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Before getting in to the subject, I would like to introduce few terminology commonly used in the manufacturing industry. The term Manufacturing Execution System (MES) was coined by AMR Research in 1990, the MES concept has evolved for almost three decades from the development of advanced, computer information systems for manufacturing. Following is the definition on an MES from the ...

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Converting Grails Applications to Plugins and vice versa

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I was in London last week on vacation with my family and was lucky that there was a London GGUG meetup during my visit. David Dawson discussed modularizing Grails applications by refactoring them into multiple plugins (you can see the video of his talk here). One thing that he mentioned was the idea of plugins that can be run like ...

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Advanced scripting in Activiti: Custom Configuration Injection

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The scripting task is probably one of the ‘oldest’ classes in the Activiti code base, but I think it is still underused by many. The (perceived?) downsides are of course performance (interpretation vs compilation) and less support from IDE perspective. However, the benefits (imo) outweigh this: Scripts are defined in the process xml itself. No more worries about versioning and ...

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Job Hopping For Geeks

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I first wrote about the topic of job hopping back in 2007 and I feel the advice I gave then is still relevant in 2013, although the perceptions and attitudes of most hiring managers have evolved significantly.  The post in 2007 was partly inspired by a past client (financial trading firm) that would only accept résumés of software engineers that were ...

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Why You Can’t Work For Google

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Many new entrants to today’s technology job market are obsessed with the handful of high-profile companies that set the trends in the industry, and the next generation of software engineers seem to think that the only companies worth working for are Google, Microsoft, Apple, Facebook, Yahoo, Twitter, and Amazon.  Software development has become both a celebrity culture (where companies and ...

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Spring MVC: REST application with CNVR vol. 3

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This is a final, third part of Spring MVC REST tutorial with CNVR. Here I will demonstrate how all that stuff works, which I have developed within first two parts. Here will be four sections for each type of CRUD operations: CREATE, READ, UPDATE, DELETE. As a pre-requirement you need to install any REST client for a working with a ...

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Spring MVC: REST application with CNVR vol. 2

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In the previous post I have made a fast overview of the setting up environment for Spring MVC REST project with CNVR. In this part I can focus directly on a controller and on demonstration of a REST service. As usually I’m going to make a short introduction and after that I will go through the controller methods and explain ...

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Groovy Sql and Oracle ‘Invalid column index’ SQLException

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There are some minor potential dangers associated with Groovy’s def keyword. The Groovy style and language feature guidelines for Java developers provides some warnings about use of def. In this blog post, I demonstrate an advantage of being more explicit in typing when using Groovy SQL with an Oracle database to avoid a potential “Invalid column index” SQLException because I’ve ...

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Spring MVC – @RequestBody and @ResponseBody demystified

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In this post i want to dig into spring mvc a little, revealing what happens behind the scenes when a request is converted to your parameter object and vice versa. Before we start, i want to explain the purpose of these annotations. What are @RequestBody and @ResponseBody for? They are annotations of the spring mvc framework and can be used ...

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