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Daniel Persson

Daniel Persson

Things I run across in my work and spare time that could be beneficial to the coder community

Category: Tips

Doing an automatic upgrade of ceph cluster using cephadm

In this video, I look into installing and enabling orchestration using cephadm. Then I will perform an automatic upgrade with … More

Talking about lambda functions in java using example

We look into lambda functions in java using example code and understand what functions could help you with. Java has … More

Writing a custom log4j appender in java, using RabbitMQ

We look into writing a custom log4j appender in java and how to send you to log messages with an … More

Looking at logrotate in debian and timers in general.

We look into logrotate on Debian and figure out how timers actually work with a system with cron installed and … More

Looking into java service provider interface (SPI). Learning by example.

I took a look at the service provider interface in java. This is a needed interface to build simple services … More

How to create a video in java

In this tutorial, I go through how to create a video in java. Using the framework Xuggle we can create … More

A quick tutorial on using JSON-simple parsing JSON documents in java

This simple tutorial will show you how to parse JSON in java using JSON-simple from Google. JSON-simple is a bit … More

Looking into Apache Common CLI

I write a lot of small java applications and need a good command line interpreter. Apache Common CLI helps me … More

Validation using schematron in java by example

We write a simple example in java to run a validation using Schematron. The framework Schematron is a way to … More

Back to the basics – Java By Example (Invoice)

In this video, I get back to the basics and show you how to use the code from my series … More

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