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.

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 ...

Read More »

The Right To Be Forgotten In Your Application

software-development-2-logo

You’ve probably heard about “the right to be forgotten” according to which Google has to delete search results about you, if you ask them to. According to a new General Data Protection Regulation of the EU, the right to be forgotten means that a data subject (user) can request the deletion of his data from any data controller (which includes ...

Read More »

Why I Introduced Scala In Our Project

scala-logo

I don’t like Scala. And I think it has some bad and very ugly aspects that make it a poor choice for mainstream development. But recently I still introduced it in our project. Not only that, but the team has no experience with Scala. And I’ll try to explain why that is not a bad idea. First and most important ...

Read More »

Writing Laws Is Quite Like Programming

software-development-2-logo

In the past year I’ve taken the position of an adviser in the cabinet of a deputy prime minister and as a result of that I had the option to draft legislation. I’ve been doing that with a colleague, both with strong technical background, and it turned out we are not bad at it. Most of “our” laws passed, including ...

Read More »

Custom Audit Log With Spring And Hibernate

jboss-hibernate-logo

If you need to have automatic auditing of all database operations and you are using Hibernate…you should use Envers or spring data jpa auditing. But if for some reasons you can’t use Envers, you can achieve something similar with hibernate event listeners and spring transaction synchronization. First, start with the event listener. You should capture all insert, update and delete ...

Read More »

Spring-Managed Hibernate Event Listeners

jboss-hibernate-logo

Hibernate offers event listeners as part of its SPI. You can hook your listeners to a number of events, including pre-insert, post-insert, pre-delete, flush, etc. But sometimes in these listeners you want to use spring dependencies. I’ve written previously on how to do that, but hibernate has been upgraded and now there’s a better way (and the old way isn’t ...

Read More »

Installing Java Application As a Windows Service

java-logo

It sounds like something you’d never need, but sometimes, when you distribute end-user software, you may need to install a java program as a Windows service. I had to do it because I developed a tool for civil servants to automatically convert and push their Excel files to the opendata portal of my country. The tool has to run periodically, ...

Read More »

Why I Prefer Merge Over Rebase

git-logo

There are many ways to work with git. The workflows vary depending on the size of the team, organization, and on the way of working – is it distributed, is it sprint-based, is it a company, or an open-source project, where a maintainer approves pull requests. You can use vanilla-git, you can use GitHub, BitBucket, GitLab, Stash. And then on ...

Read More »

Dirty Hacks Are OK

software-development-2-logo

In practically every project you’ve used a “dirty hack”. setAccessbile(true), sun.misc.Unsafe, changing a final value with reflection, copy-pasting a class from a library to change just one line of wrong code. Even if you haven’t directly, a library that you are using most certainly contains some of these. Whenever we do something like that, we are reminded (by stackoverflow answers ...

Read More »

A Beginner’s Guide to Addressing Concurrency Issues

software-development-2-logo

Inserts, updates and deletes. Every framework tutorial starts with these and they are seen as the most basic functionality that just works. But what if two concurrent requests try to modify the same data? Or try to insert the same data that should be unique? Or the inserts and updates have side-effects that have to be stored in other tables ...

Read More »

Want to take your Java skills to the next level?

Grab our programming books for FREE!

Here are some of the eBooks you will get:

  • Spring Interview QnA
  • Multithreading & Concurrency QnA
  • JPA Minibook
  • JVM Troubleshooting Guide
  • Advanced Java
  • Java Interview QnA
  • Java Design Patterns