manifold VS Squants

Considering the Amount domain types, I like the manifold project’s unit expression[1] approach where the unit and domain type are integrated and always reconciled.

1. https://github.com/manifold-systems/manifold/tree/master/man...

> I am glad to see a project that provides a robust and elegant API for building rest services in Java.

Alternatives for _consuming_ REST services is perhaps an equally interesting proposition, particularly since there are potentially potentially many consumers per service e.g., the manifold JSON project[1].

Other areas where Springboot feels overbearing include JPA/ORM support. In my view this is its greatest weakness, but like the "no one ever got fired for buying IBM" cliche, the same can be said today about Springboot.

1. https://github.com/manifold-systems/manifold/blob/master/man...

Scala's squants library is a nice implementation of units-of-measure/dimensional-analysis http://www.squants.com

In particular it uses types for dimensions; whilst units are just constructors. Hence `Meters(2)` and `Microns(7)` have the same type (`Length`).

squants for the “Market” package to use in financial calculations.

take a peek at https://www.squants.com looks like not in your language, but maybe you can apply some same concepts

You might find the Squants library for Scala interesting; it even seems like an apt usage of some oft-questioned language features.

https://github.com/typelevel/squants