Spring is discouraging use of filed injection, and in favor or constructor injection.
However, when the beans need to cross reference to each other. For example:
class BeanA{
@Autowired
public BeanA(BeanB beanB) {
this.beanB= beanB;
}
}
class BeanB{
@Autowired
public BeanB(BeanA beanA) {
this.beanA= beanA;
}
this will instead throw out exception
APPLICATION FAILED TO START
***************************
Description:
The dependencies of some of the beans in the application context form a cycle:
┌─────┐
| beanA defined in URL [jar:file:/...class]
↑ ↓
| beanB defined in URL [jar:file:/....class]
↑ ↓
| xx (field xx)
Changes
Instead of just saying "Field injection is not recommended", can we make it clear, by adding
Field injection is not recommended **however, please don't constructor injection with circular reference** ?
sbrannen
commented
3 years ago
Background
Spring is discouraging use of filed injection, and in favor or constructor injection.
However, when the beans need to cross reference to each other. For example:
this will instead throw out exception
Changes
Instead of just saying "Field injection is not recommended", can we make it clear, by adding
?
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