08-02-2023, 01:05 PM
**Example**
interface IA
{
public void someFunction();
}
@Resource(name="b")
class B implements IA
{
public void someFunction()
{
//busy code block
}
public void someBfunc()
{
//doing b things
}
}
@Resource(name="c")
class C implements IA
{
public void someFunction()
{
//busy code block
}
public void someCfunc()
{
//doing C things
}
}
class MyRunner
{
@Autowire
@Qualifier("b")
IA worker;
worker.someFunction();
}
Can someone explain this to me.
- How does spring know which polymorphic type to use.
- Do I need `@Qualifier` or `@Resource`?
- Why do we autowire the interface and not the implemented class?
interface IA
{
public void someFunction();
}
@Resource(name="b")
class B implements IA
{
public void someFunction()
{
//busy code block
}
public void someBfunc()
{
//doing b things
}
}
@Resource(name="c")
class C implements IA
{
public void someFunction()
{
//busy code block
}
public void someCfunc()
{
//doing C things
}
}
class MyRunner
{
@Autowire
@Qualifier("b")
IA worker;
worker.someFunction();
}
Can someone explain this to me.
- How does spring know which polymorphic type to use.
- Do I need `@Qualifier` or `@Resource`?
- Why do we autowire the interface and not the implemented class?