How to use cache in openmrs

Development
1

How can I use Cache in my module. I need to cache some data for later use, How do setup any of ehcache or caffeine on my openmrs module

2

Do you find this helpful? https://wiki.openmrs.org/display/docs/Caching+service+methods

3

I saw this link before, but for some unknown reason it did not work for me, I will still debug it to see were the error is coming from.