Thursday, February 26, 2015

Simple way to avoid ConcurrentModificationException

    Some time ago I spotted ConcurrentModificationExcepion in the logs. I decided to take a closer look at that in order to get rid of the problem.

Saturday, February 21, 2015

Ticking bomb in JDK 1.7.0_45 and blessing of soak tests

    Hello my friends! This is the first post in 2015 so it can be a little bit explosive. Actually, I have something that may be interesting for you if you like sleeping well. It sounds a little bit funny, doesn't it?

Sunday, December 28, 2014

Properties overriding in Spring

    Encapsulation can be applied not only to classes. It can also be applied to properties but in slightly different flavor. From my standpoint encapsulation and convention over configuration are two important factors which determine the robustness of the solution.

Tuesday, December 2, 2014

XPath evaluation performance tweaks

    I have recently played with XPath evaluation in Java. I must admit that default configuration of XPath processor in JDK is really broken. I was able to achieve some really significant performance gains with just a couple of simple tricks.

Monday, November 10, 2014

Destructive habits

    I have been using JUnit for quite a long time. I have recently done some coding with TestNG and I was a little bit shocked when I saw the assertion exception for the first time.

Thursday, October 23, 2014

The marriage

    Howdy! I have been recently involved in many marriage related things and I was not able to update my blog frequently. The last period of my private life was really intensive. On the other hand, this is a technical blog so something technical needs to be mentioned - the silence should be broken!

Wednesday, August 20, 2014

Java volatile keyword by example

    Volatile keyword seems to be a little bit enigmatic at first glance. It is rather rare to see that keyword on a daily basis. How does it work? What effect can it have on the program execution?

Friday, July 25, 2014

JMeter and WebSphere MQ Series integration

    JMeter is a popular tool for executing load tests. There is much information about it on the web. However, integration of JMeter with WebSphere MQ Series (JMS provider) is not that common. Let's try to do it!

Wednesday, July 23, 2014

Ignore particular tests on failure with JUnit

    Why on earth would you like to ignore some tests if they failed?! - you may ask. If they failed they must be red and they must draw your attention or even cut your fingers. In general, it is true. However, there is no ALWAYS and there is no NEVER.

Sunday, June 22, 2014

Simple in-memory caching with Spring 3.2 and Google Guava

    There was a proposal (not really original :)) that we can use cache to relieve external system and make our own system faster. It should be a really simple in-memory cache without any replication and fancy mechanisms. It should only have max-number-of-elements and expiration-time-after-write properties. Can that requirement be implemented in Spring easily?