I will use the typical e-commerce system as an example of my problem here.
The e-commerce system has bounded contexts like
Identity and Access.
Sales could be a core bounded context. The
Shipping is a supporting bounded context. And the
Identity and Access is a generic bounded context.
The core bounded context should be self-built, but the supporting bounded context and the generic bounded context could use the third-party system.
Let's say we only use a third-party system for
Identity and Access bounded context.
Since each bounded context should have its own database, when the new user is registered in
Indentity and Access bounded context, we have to create a new
But the third-party system has its own definition of
user data and when it changes, the UI and the server have to change too. This causes a lot of trouble when building a big system.
How would you integrate the third-party system to this system?