Juraj Blahunka

Force automatic reload of "Expires: never" resources (css, js)

Mon, 19 May 2014 00:00:00 +0000

During website development, you have probably already experienced following situation:

Make significant changes to website CSS
Deploy changed CSS to webserver / app server
Verify changed resource by navigating to website an pressing “Reload”
Everything looks allright, you pack your bags and head home

And the story continues… You arrive home and you realize, that your CSS is not refreshed. What happened wrong? You start to investigate. Then you realize, that the resource was cached by your browser and doesn’t change on a simple page request, because you are using a long resource expiration.

Recover from GTID replication relay log error in MySQL 5.6 using GTID_PURGED

Sun, 18 May 2014 00:00:00 +0000

Recently, we had an error in our production system. Replication on MySQL Slave failed. It was not caused by a bug, but by an unexpected Slave server restart of the whole machine. After checking SHOW SLAVE STATUS\G we got scared, that Master’s binlog is also corrupt, which happened not so long ago - MySQL Bug #7022.

Fortunately, Master’s binlog was intact, so we moved back to Slave, to solve the problem (removed MySQL noise for brevity):

Inject JBoss 7 system properties into your Java EE application

Sat, 17 May 2014 00:00:00 +0000

How do you make your Java EE application configurable? Do you use Maven profiles? Properties file? Environment properties? If you have developed with JBoss 7 before, you have probably already heard about JBoss 7 System Properties.

They are usually specified in configuration file of mode specific directory, for example standalone, they are persistent (live through server restarts) and can be configured, most usually via jboss-cli.

One of the great things about Java EE application development is its flexibility. Why not use this flexibility to inject these properties into runtime?

Hello, world!

Tue, 08 Apr 2014 00:00:00 +0000

I did it! My first steps with new platform and legendary words every programmer is happy to see. Hello, world! And hello to you!

Welcome to my Blog, a place, where I will discuss my thoughts on software development. I hope, that I will achieve at least some of following goals:

Contribute to the Open Source community, so expect musings about personal projects (GitHub).
Remind myself about stuff I tend to forget, so expect mental notes about small pieces of technology.
Create content, which is easy to read, understand and process, so expect a lot of:

try {
	writeContent();
} catch (NoPointInPublishingException e) {
	tryAgain();
}

My name is Juraj Blahunka and I’m Java+.