Andrzej Karczyński

Deploying multiple spring boot applications to a single application server

Spring boot is great framework to easily create applications with production-ready features such as metrics, health checks and externalized configuration. You can create stand-alone applications with embedded servlet container or you can deploy application traditionally to application server. Unfortunately spring boot

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Advanced faceted search in SQL database using MyBatis

Faceted search is popular technique used in online retailers. Users can search for product using multiple filters, called facets, narrowing result list in each step. In addition to that, filters can show number of products matching each facets for selected conditions.

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How to use MyBatis to effectively perform batch database operations?

During your software projects you must have come across an issue which includes bulk operations on relational database (mass updates, inserts, deletes). As it occurs, performing single statements for bulk operations is lengthy due to the fact that each database action involves using (setting

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Using Tesseract OCR to extract scanned invoice data in Java application

Optical character recognition (OCR) is not an easy problem. It is a process for extracting textual data from an image. OCR is a field of research in pattern recognition, artificial intelligence and computer vision. It can be used to extract

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Devoxx 2015 Poland: Creating microservices

Probably the most popular topic at the Devoxx 2015 conference in Poland was microservices. You could learn about general principles of microservices, how to write, test, deploy, and monitor microservices. In this article I will summarize what I learned, based

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Devoxx 2015 Poland Summary. Is it worth it?

On 22 – 24 June 2015 I attended Devoxx Java conference in Krakow. It is the biggest Java conference in Poland. There was 2000 participants from 20 different countries and 100 speakers. Everyday there was 10 hours of talks, up to 6 talks simultaneously.

In this blog entry I try to summarize common topics, popular trends, favorite speakers and generally what can you expect on Devoxx conference from perspective of java developer.

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