Stack traces are undoubtedly a very useful instrument for tracing the processing flow in the event of an error. Error messages, invocation hierarchy, root causes, not necessarily in a very compact format, but it provides valuable information for us developers. Sooner or later, however, you will notice that stack traces…

In today’s blog post, we cover a topic that at first seems pretty trivial to programmers outside of the world of Reactive Programming. I’m talking about “try-catch-finally”. Most programming languages offer keywords for this purpose, so it is very easy to implement and use. In a try block we perform…

When starting with Reactive Programming, some operators are easy to grasp and some are rather difficult to understand. Some operators share a common purpose, like map and flatMap that both transform the input type into some potential different output type. …

Today’s blog post stems from a recent discovery in a customer project. We are maintaining a service that was suffering from a performance problem. The service prepares infrastructural data from various sources and offers them to the outside world, nothing extraordinary. …

Today, at peak times customer facing applications often have to cope with tens of thousands or more simultaneous requests. While cloud computing and the accompanying possibilities of dynamic scaling of applications help to overcome this, they also reach their limits at some point. …

I’m a passionate Scala developer. I like the language and the concepts behind it and especially the stuff you’re able to do that only few general-purpose language support. Features like pattern matching, type classes, for comprehensions, or extension methods to which I have become accustomed and wouldn’t want to miss…

At Digital Frontiers we all have our favourite languages. The other day we were arguing about advantages and shortcomings of some specific ones and decided to have a closer look at them, using a Sudoku verifier as common example. …

In my last blog post, I gave you an introduction to reactive programming that was meant to explain when to use and, even more important, when not to use reactive programming. This emerging programming paradigm is initially anything but easy to grasp. …

Reactive Programming has long since begun its journey from pure web applications to Java Enterprise applications. It promises higher performance and lower memory footprints through the use of asynchronous non-blocking calls. Most likely, you already read some documentation and blog posts about Reactive Programming or one of its implementations in…