Custom Git subcommands

Heavy users of Git often find themselves writing their own Git shortcuts or scripts which combine multiple Git commands for…

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Strategy Pattern with CDI and lambdas

The strategy design pattern dynamically chooses an implementation algorithm, a strategy, at runtime. The pattern can be used to select…

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Java code style operator new line formatting

Last week, I discovered what helped me deciding on what I have struggled with for a longer time: whether to…

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PostgreSQL on Open Liberty

Open Liberty is an interesting new OSS Java EE application server that originated from WebSphere Liberty. You can configure Open…

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EnumSet for enum collections

In the last blog post we discovered EnumMaps for mappings with enum keys. You might have observed that there is…

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Mapping enum keys with EnumMaps

Here’s a type that has been around in the JDK for a while and that comes in handy when we…

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Transactional exception handling in CDI

In Java EE, exceptions that are raised during the execution of a transactional business method cause the transaction to rollback.…

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Write custom AssertJ assertions

AssertJ is an alternative matching library to the widely used Hamcrest matchers. For my own projects I in fact have…

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Caching method results with JCache

In JCache there is a handy functionality that transparently caches the result of methods. You can annotate methods of managed…

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