1
vote
1answer
109 views

From a DDD perspective is a report generating service a domain service or an infrastructure service?

Let assume we have the following service whose responsibility is to generate Excel reports: class ExcelReportService{ public String generateReport(String fileFormatFilePath, ResultSet data){ ...
4
votes
5answers
532 views

How to model an address type in DDD?

I have an User entity that has a Set of Address where Address is a value object: class User{ ... private Set<Address> addresses; ... public setAddresses(Set<Address> ...
1
vote
1answer
332 views

Applying DDD principles in a RESTish web service

I am developing an RESTish web service. I think I got the idea of the difference between aggregation and composition. Aggregation does not enforce lifecycle/scope on the objects it references. ...
1
vote
2answers
161 views

Determining the aggregates in this domain

I'm working on an ordering system where we receive tab delimited files that look like this (I removed most of the columns for clarity): OrderId OrderLineId BuyerName BuyerAdress ...
1
vote
1answer
324 views

Refactoring the shipping application code to use DDD factories

I was trying to find examples for using DDD factories and I came across the shipping application from Eric Evans' book. However when I checked the BookingService the code to create a Cargo had this ...
3
votes
1answer
100 views

Handling ground-breaking changes in a production system - Insert intermediate level Management object

As our client request, we are proceeding to change the base of our system. We already have the following structure: A class has many students. (simple typical one - to - many) Now we must change ...
4
votes
2answers
327 views

A design decision in composition or aggregation

I've recently had doubts about some design decisions that I frequently make, so this time I decided to take some time and try to analyze it to find the best solution. I will describe a simple scenario ...
7
votes
2answers
613 views

Domain Services as facades

I read .NET Domain-Driven Design with C#: Problem - Design - Solution and I noticed that the author created a domain service for each aggregate root. However, the domain services were only facades to ...
17
votes
5answers
959 views

Do ORMs enable the creation of rich domain models?

After using Hibernate on most of my projects for about 8 years, I've landed on a company that discourages its use and wants applications to only interact with the DB through stored procedures. After ...
1
vote
1answer
389 views

DDD and validation of aggregate root

Suppose an aggregate root : MailConfiguration (wrapping an AddressPart object). The AddressPart object is a simple immutable value object with some fields like senderAdress, recipentAddress (to make ...
19
votes
6answers
17k views

Difference between a service class and a Helper class

I would like to know what differentiates a Service class from a utility class or a helper class? A class only with underlying methods calls the dao's is a service? Doesn't the usage of Helper ...