February 2013
Intermediate to advanced
656 pages
21h 26m
English
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Chapter 7. Services
Sometimes, it just isn’t a thing.
—Eric Evans
A Service in the domain is a stateless operation that fulfills a domain-specific task. Often the best indication that you should create a Service in the domain model is when the operation you need to perform feels out of place as a method on an Aggregate (10) or a Value Object (6). To alleviate that uncomfortable feeling, our natural tendency might be to create a static method on the class of an Aggregate Root. However, when using DDD, that tactic is a code smell that likely indicates you need a Service instead.
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.