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Some time ago the NOS started providing their data as open data through an API. Using this API you can get the latest news items. You can limit the results to sport news. There is also a search available and a few more categories to find news for. The API is a REST like api and can return xml as well as JSON. In this blog post I am creating an API with the Spring framework RESTTemplate. Continue reading Using the NOS open data API with the springframework and jackson At the end of 2010 I reviewed the book “OSGi and Apache Felix 3.0 Beginner’s Guide“. The people from packt publishing contacted me based on my involvement in the past with OSGi and felix. I wrote a number of blog posts on OSGi and felix and gave a presentation at the NLJug together with [...] Today, I released version 0.6 of the Axon Framework. 0.6 has many new features and is another step towards full production readiness. There is still some work to do, but first, let’s take a look at what has changed… Continue reading Axon Framework 0.6 released Last Thursday (July 22nd, 2010) Rob Pike, a Principal Engineer at Google, gave a talk at the O’Reilly Open Source conference. In this talk he stated that established languages such as C++ and Java are too complex and not adequately suited for today’s computing environments. He then proceeded with some criticism of dynamically typed languages (that I share) and finally ended up plugging the Go language (which he co-developed) as a solution to the problem. Now, Rob Pike is not nobody (in addition to being a Google principle engineer he has C and Unix credentials), plus the Go language has the Google brand name on it, so I thought it would be a good idea to check it out…. Continue reading An evening on the Go
Besides some changes to existing building blocks, such as the event bus, which is now much more powerful, the 0.5 version also includes some new features. Read on to find out more. Continue reading Axon Framework 0.5 released
Read on to find out more. Continue reading Axon Framework – the CQRS framework for Java – version 0.4 released Command Query Responsibility Segregation (CQRS) is an architectural style that makes a clear distinction between commands, which tell an application to do something, and queries, which are requests for information from an application. This distinction comes from the fact that the requirements (and thus also the model) for the execution and validation of commands are significantly different than those for queries. Events play an important role in the synchronization of application state resulting from executed command. Applying a CQRS style architecture involves the development of quite a lot of “plumbing” code: event dispatching, asynchronous event processing, transactions, etc. cqrs4j, an Apache 2 licensed open source framework, takes care of all the plumbing for you. Read on to find out how… Continue reading CQRS made easy with cqrs4j
Last week I was at the NLJug J-Fall. This is a conference for Java developers organized in the name of the Dutch Java Users Group. One of the keynotes was given by Reginald Hutcherson from Sun. He talked about Sun and of course also about making Java and many related products open source. He explained why this was very good. Since we all love free software. This was obviously a comment with a humorous undertone. Yet there are still many people who truly believe open source is just free software. What is really free in this context? Like many others I am think that open source software is not free. Read on to learn why Continue reading Open source as in free |
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Today, I finalized the 0.5 release of the Axon Framework. There is quite a number of changes since the 0.4 version. The 0.5 version is a major step towards production readiness of the framework.
Last week, I published the 0.4 release of the Axon Framework. Axon helps developers build high performance, scalable and extensible applications using the CQRS pattern. The 0.4 release is a major step towards 1.0, and includes transactional event handling, high-performance caching repositories and easy configuration of event sourcing support. Furthermore, we have also built a demo application that uses Flex to get real-time updates pushed from the server.
