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2nd March 2018

PHP application cannot connect to MySQL over SSL

By Desislav Kamenov Coding, Infrastructure, Solution Architecture  3 Comments
This article describes how to solve PDOException: SQLSTATE[HY000] [2002] Connection refused when connecting from any PHP application with PDO::MySQL to a SSL enabled MySQL database with mismatching CN.
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22nd February 2018

MySQL SSL/TLS connections with Oracle SQL Developer

By Desislav Kamenov Infrastructure  8 Comments
This article covers how to setup Oracle SQL Developer to use MySQL driver and connect via SSL/TLS to a MySQL server database with a PKCS12 certificate.
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5th August 2017

How do you identify your objects?

By Desislav Kamenov Coding, Solution Architecture  1 Comment
In every software application there is a need to uniquely identify objects. Depending on their real-life representation there are properties, which naturally serve as a unique key. For example a car object can use its plate number, a person object can use their fingerprint image, a flight can use its code etc. But other objects
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5th August 2017

Funny images – episode 1

By Desislav Kamenov Fun  0 Comments
A collection of funny images I’ve stumbled upon recently.
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23rd June 2017

Application errors monitoring with HipChat and Bash

By Desislav Kamenov Infrastructure, Solution Architecture  0 Comments
The classical support flow – an error occurs, a user opens a ticket / phones support,  company investigates, a fix is put in place, ticket is updated / user is called back – is very reactive. Here’s how we made it a bit proactive with HipChat and Bash for free to increase user satisfaction.
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22nd June 2017

Cloud backed on-demand thumbnails of any size

By Desislav Kamenov Coding, Infrastructure, Solution Architecture  1 Comment
A solution of how to provide on-demand thumbnails of any size, based on user uploaded images, stored on Google Cloud Storage with Nginx and a Java restful web service. Cache generated thumbnails and make them disposable keeping only originals. Save storage space by deleting old or all thumbnails.
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