Which thread executes CompletableFuture’s tasks and callbacks?

CompletableFuture is still a relatively fresh concept, despite being introduced almost two years ago (!) in March 2014 with Java…

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Spock VW: writing custom Spock framework extensions

Spock framework has multiple built-in extensions that support many core features like @Ignore and @Timeout annotations. But more importantly developers…

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Dependency injection: syntax sugar over function composition

Quoting Dependency Injection Demystified: “Dependency Injection” is a 25-dollar term for a 5-cent concept. *James Shore, 22 Mar, 2006 Dependency…

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Displaying progress of Spring application startup in web browser

When you restart your enterprise application, what do your clients see when they open the web browser? They see nothing,…

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Server-sent events with RxJava and SseEmitter

Spring framework 4.2 GA is almost released, let’s look at some new features it provides. The one that got my…

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RESTful considered harmful

I don’t like RESTful principles and APIs. In recent years it is seen as universal protocol for inter-process communication, especially…

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Consuming java.util.concurrent.BlockingQueue as rx.Observable

Classical producer-consumer pattern is relatively simple in Java since we have java.util.concurrent.BlockingQueue. To avoid busy waiting and error-prone manual locking…

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Writing a download server. Part VI: Describe what you send (Content-type, et.al.)

As far as HTTP is concerned, what client is downloading is just a bunch of bytes. However client would really…

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Writing a download server. Part V: Throttle download speed

In the age of botnets that you can rent for few hundred bucks and run your very own distributed-denial-of-service attack,…

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