Spring Framework Reference Documentation
5.0.0.M1 Spring Framework iv
Inner beans .............................................................................................. 37
Collections ............................................................................................... 37
Null and empty string values ..................................................................... 39
XML shortcut with the p-namespace .......................................................... 40
XML shortcut with the c-namespace .......................................................... 41
Compound property names ....................................................................... 42
Using depends-on ............................................................................................ 42
Lazy-initialized beans ....................................................................................... 42
Autowiring collaborators .................................................................................... 43
Limitations and disadvantages of autowiring ............................................... 44
Excluding a bean from autowiring .............................................................. 45
Method injection ............................................................................................... 45
Lookup method injection ........................................................................... 46
Arbitrary method replacement ................................................................... 48
3.5. Bean scopes ..................................................................................................... 49
The singleton scope ......................................................................................... 50
The prototype scope ......................................................................................... 50
Singleton beans with prototype-bean dependencies ............................................ 51
Request, session, application, and WebSocket scopes ....................................... 51
Initial web configuration ............................................................................ 52
Request scope ......................................................................................... 52
Session scope .......................................................................................... 53
Application scope ..................................................................................... 53
Scoped beans as dependencies ................................................................ 54
Custom scopes ................................................................................................ 56
Creating a custom scope .......................................................................... 56
Using a custom scope .............................................................................. 57
3.6. Customizing the nature of a bean ....................................................................... 58
Lifecycle callbacks ............................................................................................ 58
Initialization callbacks ............................................................................... 59
Destruction callbacks ................................................................................ 59
Default initialization and destroy methods .................................................. 60
Combining lifecycle mechanisms ............................................................... 61
Startup and shutdown callbacks ................................................................ 62
Shutting down the Spring IoC container gracefully in non-web applications
................................................................................................................. 64
ApplicationContextAware and BeanNameAware ................................................. 64
Other Aware interfaces ..................................................................................... 65
3.7. Bean definition inheritance ................................................................................. 66
3.8. Container Extension Points ................................................................................ 68
Customizing beans using a BeanPostProcessor ................................................. 68
Example: Hello World, BeanPostProcessor-style ........................................ 69
Example: The RequiredAnnotationBeanPostProcessor ............................... 71
Customizing configuration metadata with a BeanFactoryPostProcessor ................ 71
Example: the Class name substitution PropertyPlaceholderConfigurer .......... 72
Example: the PropertyOverrideConfigurer .................................................. 73
Customizing instantiation logic with a FactoryBean ............................................. 74
3.9. Annotation-based container configuration ............................................................ 74
@Required ....................................................................................................... 76
@Autowired ..................................................................................................... 76
