Software As If It Matters

David Dossot

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Top Stories by David Dossot

I'm super excited to announce RxMule, my latest open source project. RxMule provides reactive extensions for Mule ESB, via a set of specific bindings for RxJava. For several years, I've been mulling over the idea of creating a DSL for configuring Mule. Indeed, there is a treasure trove of pre-existing transports and connectors for Mule, which is very compelling for anyone building connected applications (which, nowadays, is probably everybody). Unfortunately developers can be put off by the XML-based DSL used to configure Mule, and thus may pass the opportunity to leverage all this available goodness. As Rx is gaining traction, more and more developers are getting accustomed to its concepts and primitives. With this mind, and knowing that Mule is at core an event processing platform, it dawned on me that instead of creating a DSL that would mimic the XML artifacts... (more)

DevOps Days Vancouver 2014 By @DDossot | @DevOpsSummit [#DevOps]

Call Me Never (Ignite Talk) I've been super honored to give an ignite talk during DevOps Days Vancouver 2014. Ignite talks are intense, as the slides mercilessly fly-by every 15 seconds, and this for 5 minutes sharp (yes, that's just 20 slides!). In this talk, I tried to present some of the lessons we've learned at Unbounce while rebuilding our page serving infrastructure. Our availability target is five-nines (that's an allowance of 6 seconds of downtime per week) so we've put lots of effort into building a stable, self-healing, gracefully-degrading piece of software. We had a f... (more)

Grafting Mule Endpoints

In Mule ESB, outbound dispatching to a destination whose address is known at runtime only is a pretty trivial endeavor. A less frequent practice consists in programmatically defining inbound service endpoints. I recently had to do such thing for a little side project I'm running where Mule is used as a frontal bus and load throttler in front of a R nodes exposed over RMI. The goal was to have a non-fixed number of file inbound endpoints defined in a simple properties file and declare them on a particular service during the initialization sequence of Mule. As an integration framewo... (more)

Meet jerg, a JSON Schema to Erlang Records Generator

I'm happy to announce the very first release of my latest Erlang open source project, jerg, a JSON Schema to Erlang Records Generator. The objective of this project is to be a build tool that parses a rich domain model defined in JSON Schema (as specified in the IETF Internet Draft) in order to generate record definitions that can be used to Erlang applications to both read and write JSON. I believe that having a formally defined object model for the data that's exchange over web resources is a major plus for APIs. It doesn't necessary imply that consumers have to generate static c... (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)