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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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Spring MVC: REST application with CNVR vol. 1

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Not so long time ago I have read an article written by Paul Chapman about Content Negotiating View Resolver (CNVR). That post on a Spring Framework Blog inspired me to investigate this framework’s area. As a result I have developed a sample REST application based on Spring MVC with CNVR. The application demonstrates a basic flow of a REST service ...

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Run your Unit Tests in Parallel

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It was about time when the developer of Unit Tests had the ability to run the tests in Parallel using annotations. In today’s blog post, we will look at how you can make your traditional Junit Tests to run in parallel using annotations provided by Easytest. EasyTest  is a Testing Framework build on top of JUnit to provide you ease ...

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Java FutureTask Example Program

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Sometime back I wrote a post about Java Callable Future interfaces that we can use to get the concurrent processing benefits of threads as well as they are capable of returning value to the calling program. FutureTask is base concrete implementation of Future interface and provides asynchronous processing. It contains the methods to start and cancel a task and also ...

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