Implementing Domain-Driven Design

Integration Basics

When two Bounded Contexts need to integrate, there are a few reasonably straightforward ways this can be done in code.

One such straightforward approach is for a Bounded Context to expose an application programming interface (API), and another Bounded Context to use that API via remote procedure calls (RPCs). The API could be made available using SOAP or simply support sending XML requests and responses over HTTP (not the same as REST). Actually, there are several ways to create a remotely accessible API. This is one of the more popular ways to integrate, and since it supports a procedure call style, it is easily understood by programmers used to calling procedures or methods. That’s pretty much all of us.

A second straightforward ...