Deploy the SAML Spring Security Extension as a Standalone Module

I am doing some research on extending Spring Security SAML because we have several Spring applications that need to be integrated with SSO (SimpleSamlPHP).

Although there are several applications, they are functionally unique, and they will all run on the same server.

I read the help documentation, in particular the point "6 - Integration into applications" and it says there:

The SAML module can be directly embedded into new or existing Spring applications. In this case, the application itself includes the SAML library in the WEB-INF / lib directory of the war archive and handles all SAML interactions. Another use case for SAML is to deploy it as a stand-alone module that passes information about the authenticated user to the target application using a special mechanism. This chapter only discusses the first option.

I think that the stand-alone option might be interesting in our situation. Does anyone know what to do with this option? How do I deploy a SAML library as a stand-alone module? How do I integrate apps with this stand-alone module?