artifact not available in maven central vaadin

Question

if I look at:

vaadin.com/vaadin-8/releases/7.7.21

I can see that version 7.7.21 is available, while on maven central is not available

https://repo.maven.apache.org/maven2

Now I wonder why? Besides if I look at:

https://vaadin.com/support/vaadin-7-extended-maintenance

there is written that version 7.7.23 has "Changed license from Apache 2.0 to CVDLv4.", that means "I cannot use 7.7.22 anymore? without paying?

Answer 1

We released 7.7.18 to 7.7.22 in private maven repository (password available only for those who have subscription) and changed distribution mechanism since version 7.7.23. Regardless of distribution mechanism Vaadin 7.7.18+ is no longer a free product. Legit use requires to obtain license of Vaadin 7 Extended Support, which is option included in Vaadin's Prime subscription.