DI Frameworks – some hidden pearls
summary
Compares CDI, Spring, Dagger, HK2 and BonDI with concrete tests: finds BonDI bug: producer ordering is random (ConcurrentHashMap key order causes surprising selection), shows reflection fails on some Java 8 classes, demonstrates prototype and module merge semantics that queue rather than merge, and contrasts annotation‑processing (Dagger) vs runtime reflection (BonDI/Weld) tradeoffs. Publishes a dynamic DI prototype with runtime switching and caching and reports a microbenchmark hitting 3 million injects/sec JIT benchmark to prove feasibility.
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chapters (9)
- 0:00Introduction and background
- 4:05Dependency injection basics
- 12:21Life cycle and scopes
- 21:46Qualifiers and alternatives
- 30:50Module and object graph handling
- 37:57Prototypes and deep copies
- 41:29Reflection and annotation processing
- 47:48Dynamic context and performance
- 53:58Choosing the right framework
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