Software As If It Matters

David Dossot

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Top Stories by David Dossot

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 while the ink on Mule in Action is still wet: RabbitMQ is a great piece of open source technology and I think it can use all the coverage it can get. From the get go, RabbitMQ has been built with the idea to make things right: it's a breeze to install and configure. Adding extra plug-ins is a no-... (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)

ESB Testing Strategies with Mule

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... (more)

Software Manifestos: A Matter Of Trust?

As software manifestos have started to proliferate these past months, I have started to wonder what could be the root cause for their creation. Why would thought leaders gather, assert a small set of values and shrink-wrap them as a manifesto, calling for others to sign it? My feeling is that these manifestos are the expression of a pushback on a particular aspect of software development that went insane. Here is a little game: match the manifestos with the software insanities they push back on: Big methodology and design up-front Software craftsmanship manifestoArmy of flying monk... (more)

Monitoring RabbitMQ with Zabbix

If you use RabbitMQ as your message oriented middleware and Zabbix as your monitoring and graphing tool, you're probably wondering how to monitor the former with the latter. Here is the Zabbix Agent configuration I use to keep track of the number of messages pending delivery and the total number of queues (this second parameter may not make sense for you if you don't create a lot of dynamic queues): UserParameter=rabbitmq.local.queues.count[*],sudo rabbitmqctl -q list_queues -p $1 | wc -l UserParameter=rabbitmq.local.messages_ready.count[*],sudo rabbitmqctl -q list_queues -p $1 m... (more)