It's important to understand that spring gets around the wiring problem by being a system for declaring and using global variables. This turns out to be a funda

It's important to understand that spring gets around the wiring problem by being a system for declaring and using global variables. This turns out to be a fundamental waste of time, as the whole point of making things dependency-injectable in the first place was to avoid global variables. However, every spring bean is a global variable, and every bean reference, whether explicit or implicit via autowiring, is a reference to a global variable. Spring results in bad, un-modular, hard-to-debug, and hard-to-maintain wiring code. Just say "no" to runtime dependency injection frameworks.