Dependency Injection, Containers, and Service Lifetime
This chapter is about dependency injection (DI), a cornerstone of modern software development because it promotes loosely coupled, testable, and maintainable code. DI decouples the creation of an object’s dependencies from the object’s behavior, allowing these dependencies to be provided externally.
DI containers automate the process of injecting dependencies, relieving developers from manually constructing and managing the lifecycle of dependencies. By configuring services within a container, applications can dynamically resolve and inject required dependencies at runtime, ensuring that each component receives the appropriate service instances. This not only simplifies the construction and wiring of dependencies but also enhances the modularity and flexibility of an application.
Understanding service lifetimes is essential for effective dependency management. Service lifetimes define the scope and duration...