6 Handling external dependencies and infrastructure
This chapter covers
- Decoupling infrastructure code from the domain
- Understanding how far to go when decoupling infrastructure
- Creating wrappers on top of infrastructure libraries and data structures
Software systems rarely exist in isolation; they often interact with databases for data persistence or web services from external companies or internal teams. A significant challenge in software design is preventing our code from being contaminated by these outside details.
You may wonder why this is a problem. There are a few reasons to protect your domain from external influences. First, they can impede your ability to replace a component with something simpler, which would facilitate testing. ...
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