Jakub Kubrynski

I'm software developer by vocation. Java team leader at work and open source enthusiast at home. Strongly interested in new technologies. Fan of java.util.concurrent and sun.misc.Unsafe. My motto is "minimum code, maximum functionality.

Enterprise Java
Jakub KubrynskiApril 6th, 2017
2 127
Understanding the first level JPA cache
I can bet that every Java developer at least heard about L1 (aka EntityManager or Session) cache. But is your level…
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Core Java
Jakub KubrynskiDecember 5th, 2016
0 37
Why should you care about equals and hashcode
Equals and hash code are fundamental elements of every Java object. Their correctness and performance are crucial for your applications.…
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Core Java
Jakub KubrynskiNovember 10th, 2015
0 54
Smart package structure to improve testability
There are many ways of dividing whole application into packages. Discussions about pros and cons of packaging by feature or…
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Enterprise Java
Jakub KubrynskiNovember 6th, 2015
0 322
JPA in case of asynchronous processing
Few years ago in Java world it was almost obvious that every “enterprise” class project needed JPA to communicate with…
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Core Java
Jakub KubrynskiMay 18th, 2015
0 37
Do we really still need a 32-bit JVM?
Even today (and it’s 2015) we have two versions or Oracle HotSpot JDK – adjusted to 32 or 64 bits architecture.…
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Core Java
Jakub KubrynskiMarch 23rd, 2015
0 37
Using jstat to report custom JVM metric sets
I’ve always been missing possibility to configure custom headers in JStat. Of course there are a lot of predefined data…
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Enterprise Java
Jakub KubrynskiJanuary 5th, 2015
0 33
Dependency injection pitfalls in Spring
There are three injection variants in Spring framework: Setter-based injection Constructor-based injection Field-based injection Each of those mechanisms has advantages and…
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Core Java
Jakub KubrynskiNovember 27th, 2014
0 58
Need micro caching? Memoization to the rescue
Caching solves wide sort of performance problems. There are many ways to integrate caching into our applications. For example when…
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Core Java
Jakub KubrynskiAugust 28th, 2014
0 155
Debugging OpenJDK
Sometimes debugging Java code is not enough and we need to step over the native part of Java. I spent…
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Thank you!