suggestion for spreeding your great work

[Just-some-one]

Hello Jakob

thanks for your great tutorial

i think sharing some of your work (a tutorial that not there) on dev.java will bring some of the audience to your tutorial site

there many missing tutorial there like

1. concurrency
2. jdbc
3. xml
4. design patteren
   and so on

so pick one or 2 of your great tutorials and publish it there

by the way

for Synchronized Block Limitations and Alternatives section of synchronized

What if you want to allow N threads to enter a synchronized block, and not just one? You could use a Semaphore to achieve that behaviour. Java actually comes with a built-in Java Semaphore class you can use.

there typo on the link for Java Semaphore

also for concurrency-models
all link for vert.x does not exist

thanks again and have a nice day :)