Quadrigacx API

I recently found myself in a situation where mission-critical software was suffering from performance problems due to relying on a remote API which was both slow (as slow as 11sec / transaction), and unreliable.   In this case, it turned out that there were multiple applications accessing this API, and every individual application was affected….

Back in the day, Paradox was a pretty amazing database.  I recently had a reason to read some Paradox files for a friend, who had a client with a Paradox database.  They needed their data out of the database to insert into something more modern. Googling for the file format of a Paradox DB didn’t…

If you haven’t read this book, I highly recommend it.  I discovered it in high school and finally purchased my first copy at the now-gone Duthie Books in Kitsilano.  Without going into the details of the book, the author uses a simple Peano arithmetic called Typographical Number Theory  (TNT) to illustrate some of his points. An example…

When writing custom servlets, it can be quite useful to unit test them.  In my case, I used a combination of testng and mockito.  The basic idea is simple; mock a HttpServletRequest, and a HttpServletResponse and pass them to the custom servlet.  There is a bit more too it, so here’s an example. final HttpServletRequest…

I recently had reason to get to know OpenAPI at work, so I decided to become familiar with it. I have a HomeSeer home controller at home, which exposes a JSON API, so I decided to write a Java OpenAPI server to expose the JSON API over OpenAPI. The net result is hsOpenAPI. It exposes…

A couple projects I’ve been working on have a need for a REPL style console.  I had written a simple framework for creating REPL’s, which is open-sourced here.