Infrastructure as a Service, like OpenStack and AWS, have made it possible to consume infrastructure on demand. It’s important to understand the ways in which both humans and machines interact with IaaS offerings in order to design optimal systems that leverage all possible automation opportunities. I drew the diagram below to help illustrate. Everything is… Continue reading
Posts tagged rest
OpenStack REST API
There are some high quality resources that already cover the OpenStack API, so this is a YEA (yet another example) post. See the resources section below for some helpful links. OpenStack APIs provide access to all OpenStack components, such as nova (compute), glance (VM images), swift (object storage), cinder (block storage), keystone (authentication) and neutron… Continue reading
Design principles for REST APIs
I have recently had to work with a few REST APIs that exhibited some poor design choices that I had previously assumed would be obvious. Since they may not be obvious to everyone, I wanted to highlight them. Idempotent operations When an operation is idempotent that means that an end state will be identical regardless… Continue reading
Echo for REST client debugging
Recently I was debugging a REST client class in Java. The service I was calling simply returned that the request was incomplete. Without access to the service logs and without more meaningful feedback from the service, I decided to create an echo script that would allow me to see exactly what my REST client was… Continue reading
RESTful Java Servlet: Serializing to/from JSON with Jackson
In a previous article I demonstrated one way to create a RESTful interface using a plain Java Servlet. In this article I wanted to extend that to include JSON serialization using Jackson. I found a very simple article showing a basic case mapping a POJO to JSON and back again. However, when I copied this… Continue reading
RESTful Java Servlet
For a recent project I found that a RESTful interface would be appropriate. My first inclination was to use Jersey (or one of the JAX-RS implementations available). The environment where this new REST API would deploy is still using Java 1.5. This became a major roadblock when I was found that none of the JAX-RS… Continue reading
Software licensing: Jersey framework for REST
I did some investigation into building the RESTful API for the software licensing system using wicket. At first I was encouraged that URL management was so easy (nevermind that really old article I just linked to). Wicket Not Ideal for RESTful APIs In the end I decided that wicket was not a good choice for… Continue reading
Software licensing: RESTful API, resources vs. parameters
I’m starting to build out the RESTful API for the software licensing system. The first api call to implement is this http://mysite/api/sitelicenses/?apikey=KEYVAL That came from the initial design documents and implicitly suggests that there is a difference between the resource and parameters passed in when asking for the resource. This distinction is important and came… Continue reading
WordPress plugin licensing: API and class diagram
In the first article in this series, I sketched out some of the basic design ideas for the wordpress plugin licensing system. The next step is to come up with some more concrete details about how the application will work, what information it will manage and what the interfaces will look like when accessing it…. Continue reading