I’ve recently become very interested in blockchain, and that, naturally led me to Ethereum and Bitcoin. From there, I got a little interested in online trading, but since I prefer not to have to think about trading, I started thinking about a trading bot. Part of the work I needed to do was write a Java API for Qaudrigacx. The API is here and is free to use under the GPL v3 terms.
I’ve been interested in RIAK for a while, and ORM’s are nothing short of fascinating. I decided to try writing an ORM for Riak, and the results are here: https://github.com/teverett/cbean My ORM is not an ORM of course, because RIAK is not relational. However it is ORM-like; I can store POJO’s and retrieve them. The…
Jasper is the JSP compiler inside Tomcat. For reasons, mainly of curiosity, I wanted to build a Pragmatach plugin which exposes Jasper. Pragmatach supports some template engines such as FreeMarker, ThymeLeaf and Velocity, but I thought Jasper would be a good addition. I chose to use Tomcat 6, mainly because Tomcat 7 uses Servlet 3.0. Pragmatach…
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…
I’ve recently been quite interested in Graph languages, not for Graph Databases, but for representing information, in code that is essentially “things” and “relationships”. For example, one perspective on Organizations is that they are simply representable as people, systems and the information that flows between them. Those three building blocks are, in theory, enough to…
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 a reason to parse a large data set, for another project. I decided that an ideal “large data set” would be my Outlook mail saved archives. Sadly, Outlook for Mac doesn’t output PST files, it outputs OLM archives, which are, essentially, giant zip files full of XML. I was coding this all…