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foojay is a place for friends of OpenJDK, providing free, reference materials and blogs for daily Java usage.

I used to believe (and still do) that DTOs should be a thing of the past. Yet, it seems their usage is still widespread.

Let’s continue our journey to learn microservice. Today we will learn to use a full-fledged MongoDB database running in a Docker container.

This article argues how Apache Cassandra is the Serverless database that is open and free as in freedom in the modern cloud era.

This article argues why Apache Pulser is better than Apache Kafka when it comes to using cloud and microservices and how it fits the …

Mar 2, 2022 Shai Almog

Posted two new videos in the "140 Second Duckling" series. They cover some basic and some little-known features of debuggers. Such as …

What happens if the child-task creates more tasks and the parent-task waits for the child-tasks to finish in TheadPool in java.

Kover is a code coverage tool for Kotlin. It's still in incubator phase but I took it for a spin and it is already very useful as part of …

It is more beneficial to use sealed and value class instead of enumerations in Kotlin; let’s find out why.

Feb 28, 2022 Shai Almog

New OSS approach for debugging live applications - right from inside your IDE or terminal window, and without stopping the live application.

The DurationAPI is coming out of its experimental stage and offers a nice DSL to easily work with time durations.