Spring Puzzlers - second season
summary
A collection of real Spring gotchas with concrete fixes: annotations on interfaces (like @PostConstruct) are ignored so a custom BeanFactoryPostProcessor is written to scan interfaces and inject init-method names — it works after reflective hacks; JavaConfig bean definitions often lack the concrete class/return-type so interface annotations don’t behave the same as @Component; @Value in configuration must be static for early initialization; injecting generic Lists + @Qualifier matches by bean type/generic not just name; prototype beans are not destroyed by the container.
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chapters (10)
- 0:00Introduction
- 1:07Iron and soldering iron puzzle
- 17:26Qualifier problem
- 23:49Two programmers story
- 35:25Actors and qualifiers puzzle
- 39:00Property placeholder and static methods
- 44:09External configs and @Value
- 46:42Constructors and @Autowired
- 47:30Terminators and destroy methods
- 50:27XML and destroy methods
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