[qooleot]

I think by "model logic" he is referring to MVC and things like data model relationships (and an ORM possibly), validation/casting, etc.

For example, in a single programming language and framework you could say:

payment.isPayPay()

from a payment out of a database wrapped into a model.

It has not been traditionally easy to share that business logic across languages (and by easy I mean not wrapping huge numbers of methods in http requests).

[BradRuderman]

This is correct. Business logic that exists in the model methods like in an MVC framework talking to backend services. When you have micro services in general you tend to have logic replicated in all the different micro services and even the consumers of those services.

[fmontesi]

Thanks, I get it now.

If you use Jolie for implementing MVC, then every component is automatically a microservice (by construction from the language) and you can reuse them very easily in Jolie, Java, and Javascript inside of web browsers.

If you use other languages:

- if you need to use logic handled by a Jolie microservice, then you just need an API for making remote calls to that microservice. Jolie provides HTTP/JSON, HTTP/XML, SOAP, SODEP, XML-RPC, Java RMI, HTTP/GWT, and others. We have native libraries in Java (also usable in Scala) for making it even easier and look more native. You do not need to consider which protocol you will use in your logic, Jolie separates data format from logic by design. So it boils down to how easy it is to make remote calls in the "client" language.

- if you have programmed your logic in another language, you will need to expose it somehow to Jolie. If you use Java or Javascript, we can reuse it natively or almost natively. Otherwise, you will need to expose the functionalities using one of the protocols above, then Jolie will immediately see it as a native service as if it were implemented in Jolie (we make no difference between stuff implemented in Jolie or not if you support any of our communication means).

Is this a satisfactory answer? We can dive into examples if you have something specific in mind.