Home » Author Archives: Bozhidar Bozhanov

Author Archives: Bozhidar Bozhanov

Bozhidar Bozhanov
Senior Java developer, one of the top stackoverflow users, fluent with Java and Java technology stacks - Spring, JPA, JavaEE, as well as Android, Scala and any framework you throw at him. creator of Computoser - an algorithmic music composer. Worked on telecom projects, e-government and large-scale online recruitment and navigation platforms.

Computer Science Concepts That Non-Technical People Should Know

Sometimes it happens that people speak different languages. Even when speaking the same language. People have their own professional inclinings. Biologist may see the world as the way a cell work, cosmologist may see relationships between people as attraction between planets. And as with languages different professional afflictions give you an useful way of seeing the world. And I think ...

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Forget ISO-8859-1

UTF-8 was first presented in 1993. One would assume that 24 years is enough to time for it to become ubiquitous, especially given that the Internet is global. ASCII doesn’t even cover French letters, not to mention Cyrillic or Devanagari (the Hindi script). That’s why ASCII was replaced by ISO-8859-1, which kind of covers most of western languages’ orthographies. 88.3% ...

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Anemic Objects Are OK

I thought for a while that object-oriented purism has died off. But it hasn’t – every now and then there’s an article that tries to tell us how evil setters and getters are, how bad (Java) annotations are, and how horrible and anti-object-oriented the anemic data model is (when functionality-only services act upon data-only objects) and eventually how dependency injection ...

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Amend Your Contract To Allow For Side Projects

The other day Joel Spolsky blogged a wonderful overview of the copyright issues with software companies in terms of its employees. The bottom line is: most companies have an explicit clause in their contracts which states that all intellectual property created by a developer is owned by the employer. This is needed, because the default (in many countries, including mine) ...

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Keep Server IPs In Apps

As a consequence of the Dyn attack many major websites were down, including twitter – the browsers could not resolve an IP address of the servers because the authoritative name server (Dyn) was down. Whether that could be addressed globally, I don’t know – there was an interesting discussion on reddit about my proposal to increase TTL – how the ...

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Using Named Database Locks

In a beginner’s guide to concurrency, I mentioned advisory locks. These are not the usual table locks – they are table-agnostic, database-specific way to obtain a named lock from your application. Basically, you use your database instance for centralized application-level locking. What could it be used for? If you want to have serial operations, this is a rather simple way ...

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Short DNS Record TTL And Centralization Are Serious Risks For The Internet

Yesterday Dyn, a DNS-provider, went down after a massive DDoS. That led to many popular websites being inaccessible, including twitter, LinkedIn, eBay and others. The internet seemed to be “crawling on its knees”. We’ll probably read an interesting post-mortem from Dyn, but why did that happen? First, DDoS capacity is increasing, using insecure and infected IoT devices with access to ...

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The Broken Scientific Publishing Model and My Attempt to Improve It

I’ll begin this post with a rant about the state of scientific publishing, then review the technology “disruption” landscape and offer a partial improvement that I developed (source). Scientific publishing is quite important – all of science is based on previously confirmed “science”, so knowing what the rest of the scientific community has done or is doing is essential to ...

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Traditional Web Apps And RESTful APIs

java-interview-questions-answers

When we are building web applications these days, it is considered a best practice to expose all our functionality as a RESTful API and then consume it ourselves. This usually goes with a rich front-end using heavy javascript, e.g. Angular/Ember/Backbone/React. But a heavy front-end doesn’t seem like a good default – applications that require the overhead of a conceptually heavy ...

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