If you have a team developing OSGi applications for Apache Karaf, Vagrant provides an easy way to ensure everyone is testing local deployments in a consistent context. Vagrant is a little like Docker, using a layered approach to build up virtual environments. In this case, we create an Ubuntu “box”, running on a VirtualBox VM, and automatically set it up with everything necessary for Karaf testing. Continue reading
By default, each Apache Camel route has its own error handler, meaning each independently catches and handles Exceptions thrown within it. But, what if a “parent route” needs to catch and handle Exceptions thrown by a sub-route? Here’s one approach: Continue reading
Here’s a quick tip: the easiest way to find transaction leaks in Wildfly/JCA. In standalone.xml’s JCA subsystem, change
That will automatically close un-closed JCA connections and spit out a nice warning/stacktrace, showing exactly where the transaction was opened.
Here are a few notes I took while reading The Checklist Manifesto, by Atul Gawande. Admittedly, the notes are sparse. Although the book makes powerful points, the whole thing could be condensed into a few pages. Instead, it provides 200 pages of anecdotes and examples. Helpful, for sure, but largely repetitious…
Want an easy way to backup your server to Amazon S3? Simply use this shell script as a cron job (I currently have it set to run every 3 days). This specific script assumes a YUM-based software repository, MySQL, and Apache. However, it can easily be changed for different environments. Continue reading
My list of unorganized notes from The Open Organization, by Jim Whitehurst (Red Hat CEO): Continue reading
Gone are the days of requiring large amounts of resources to adequately run a fast, enterprise-grade web server. I currently run a single DigitalOcean instance (the 1GB memory plan) and host many web platforms with no performance issues, whatsoever. I thought I’d share the settings that have been working really well in this low-memory environment. Note that the server is running CentOS 7, but these settings should be applicable for any OS.
When adding a new website to an existing web server, the process of setting up Apache and creating FTP users is a bit tedious. However, it’s really easy to automate with a simple script. The following is an example Shell script that automatically: Continue reading
Today was not a good day. In short, a nonprofit’s online donation form was hit 1,285 times in an attempt to validate stolen credit cards. Unfortunately, 120 of those succeeded, meaning our Stripe account had over $600 in fraudulent donations. I needed a quick way to fully refund those charges, but in bulk. Through the Java API client, I was able to do the following. I figured I’d throw it out here, in case someone else can use it. Note that although it uses the Java client, the concept is identical for others. Continue reading
Getting right to the point, many (possibly even most) software/web developers will simply hand you the deliverable upon project completion and call it a day. The tools and processes used are often held back, forcing you to always go through them for updates or eventually argue with them to get what you need. Although the former may make a bit of business sense on the consultant’s side, I’d argue that this methodology is terrible. Continue reading