Active Objects vs Entity Manager

[Garambela Asadela]

While developing a plugin I implemented my persistence layer with help of the Active Objects Library. 

Somehow it just worked but when I was researching about testing AO's, I saw the use of EntityManager in many places and wondered if I'd have to use it, too.

As I couldn't find any satisfying content in the documentation about it I want to ask you, Atlassian Experts, what exactly the use of this EntityManager is.

• Does using it have an advantage over using "pure Active Objects" without it? 
• How can I test my AO's without it or can I just use the EM for my Unit-Tests?
• Will my plugin still be backwards compatible when I use the EM?

Thank you very much in advance!

G.A.

[Nic Brough -Adaptavist-]

You're already using it, it's a key part of the AO functionality.

See https://developer.atlassian.com/docs/atlassian-platform-common-components/active-objects/developing-your-plugin-with-active-objects/the-active-objects-library/creating-an-entitymanager