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Software As If It Matters

David Dossot

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Top Stories by David Dossot

To be able to do anything useful, an ESB must be configured with all sorts of parameters, from endpoint connection URIs to message transformation scripts to content-based routing definitions. Moreover, ESBs like Mule can host custom components, which will process messages and perform user-specific actions on them. Deploying a new version of an ESB configuration raises the question of whether it will break anything. How can we build confidence that everything will be just fine? If unit testing did it for standard software development, what can it do in the realm of the ESB? Since ESBs are becoming increasingly familiar in corporate IT, getting concrete answers is of interest to more and more people. This article details the testing strategies I employ for Mule ESB-driven projects, which I think contain elements that could be generalized to other platforms. I am cer... (more)

My Final Word (Almost)

In "Final Parameters and Local Variables", Dr. Heinz M. Kabutz rants against the generalized used of the final keyword in Java code. For him, this is a "trend' and an "idiotic coding standard". I'm a firm believer of the complete opposite. As a software developer, I spend most of my time reasoning about code. Anything that can make this reasoning easier is welcome. Good practices like short methods and descriptive names fall in this category. I believe immutable variables do too. Immutable variables simplify reasoning because they ensure a stable state within a scope, whether it'... (more)

CRaSH for Mule, an Introduction

This blog is the formal introduction to the CRaSH console for Mule on which I've been working for the past month or so. I've decided to interview myself about it because, hey, if I don't do it, who will? What is CRaSH for Mule? It is a shell that is running embedded in Mule and that gives command-line access to a variety of Mule internal moving parts. It's built thanks to the excellent CRaSH project, a toolkit built by Julien Viet and sponsored by eXo Platform, which allows the easy creation of embedded shells. What can we do with it? Well, it's easy to find it out. Let's connect ... (more)

I write only about funny animals

The rabbit is out of the hat: I'm indeed working on a new book. It's called "RabbitMQ Essentials" and is published by PackT Publishing. Yes, you're reading right, after Mule, it's now RabbitMQ's turn! Clearly, I'm specializing in writing about animal-named technologies. (C) Kallisto Stuffed Animals Why writing yet another book about RabbitMQ? After all, there are already several very excellent books on the subject out there. I think Ross Mason gave the best answer to this question on Twitter: Let me further articulate the reasons why I decided to embark on this new book project whi... (more)

JMX Monitoring for Scout

Scout is a very convenient monitoring platform in the cloud that I have started to use recently. I needed to monitor JMX data point, something that Scout doesn't do by default. One of the many shiny things about Scout is its extensibility: it is super trivial to write a Ruby plug-in and have start use it to report custom data points. Therefore, I've created a JMX plug-in which, after some QA from the awesome team at Scout, just ended up in their repository of supported plug-ins. Read more about this here. ... (more)