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Impulse: “Crafted Design”


About half a year ago I urged you to watch Robert C. Martin’s talk Architecture – The Lost Years. It argued in favor of a design that clearly displays the application’s domain (e.g. logical units, services, use cases, …) and keeps auxiliary aspects (e.g. delivery mechanism, persistence, …) on the sidelines. While I really liked the talk, it was fairly ...

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Creating a Message Driven Bean with AWS SQS in Spring


In my previous post I showed a simple example how to use AWS SQS with Spring Framework to put messages on a queue and to read them from the queue. In this post I go one step further and use Spring to create a ‘Message Driven Bean’ so each message that is put on the queue is picked up and ...

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Netflix Archaius for property management – Basics


Netflix Archaius provides a neat set of features to load dynamic properties into an application. This blog post is just a documentation of the extent of Archaius that I have understood, there is much more to it than I have documented here, but this should provide a good start:     Default Behavior Consider a simple properties file: stringprop=propvalue listprop=value1, ...

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WildFly 9 on NetBeans, Eclipse, IntelliJ, OpenShift, and Maven


WildFly 9 CR1 was recently released. Lots of cool features are included: Intelligent load balancing HTTP/2 and SPDY support A new offline CLI mode Graceful single node shutdown A new Servlet-only distribution And this is above the usual Java EE 7 compliance! This blog is a quick check to verify that it works in all three major IDEs and OpenShift. ...

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Logging JAX-WS SOAP messages in Spring


Whenever you’re using JAX-WS within Spring you’ll probably want to log the incoming and outgoing SOAP messages – if only for debugging during development. So the first thing to do is increase the log levels, right? Unfortunately this will have no effect. What you will have to do is to make use of the interface. So how do we ...

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Updating code at runtime (spring-loaded demystified)


When the development cycle from compile over deployment up to testing takes too long, one wishes to be able to replace the running code just in time without the need for restarting an application server and waiting until deployment has been finished. Commercial solutions like JRebel or open source frameworks like Grails help in such kind of situations. Replacing code ...

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Getting Started With Gradle: Integration Testing


Because the standard project layout of a Java project defines only one test directory (src/test), we have no standard way to add integration tests to our Gradle build. If we want to use the standard project layout, we can add integration tests to our Gradle build by using one of the following options:       We can add our ...

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