DDD Entities making use of Services

Question

I have an application that I\'m trying to build with at least a nominally DDD-type domain model, and am struggling with a certain piece.

My entity has some business logi

Answer 1

Have your service accept the Ticket entity as a parameter. Services should be stateless and the same service should be able to provide its services to any number of entities.

In your situation I would pull the FinancialCalculatorService and RateCalculatorService out of your entity and make the methods on each service accept the Ticket entity as a parameter.

Take a second and read pg. 105 of Domain-Driven Design by Eric Evans