5.1. Business logic organization patterns
Figure 5.1 shows the architecture of a typical service. As described in chapter 2, the business logic is the core of a hexagonal architecture. Surrounding the business logic are the inbound and outbound adapters. An inbound adapter handles requests from clients and invokes the business logic. An outbound adapter, which is invoked by the business logic, invokes other services and applications.
Figure 5.1. The Order Service has a hexagonal architecture. It consists of the business logic and one or more adapters that interface with external applications and other services.
This service consists of the business ...