Let's say I have following spring.xml (SomeBean is managed by spring)
<bean id="some_bean" class="SomeBean" />
and class (this one is not managed)
public class MyClass {
@<some magic or something else?>
private SomeBean sb;
}
and my main
public class Main {
public static void main(String[] args) {
new MyClass().getSB();
}
}
How to make that by creation of new class (using new keyword) MyClass instance have access to bean with id="some_bean"?
You can inject some_bean directly to your pre-existing MyClass if you employ Spring AOP and annotate it with @Configurable:
@Configurable
public class MyClass {
@Autowired
private SomeBean sb;
}
The above code will inject by Type. If you happen to have more than one SomeBeans, then inject by name:
@Configurable
public class MyClass {
@Autowired
@Qualifier("some_bean")
private SomeBean sb;
}
AspectJ for 1st time. It says that I might need 3 jars (aspectjrt, aspectjtools and aspectjweaver) so i add them into dependency. Also tried add something like <context:spring-configured/> but nothing really happens as well. What I'm missing?If you have access to application context then you can get it as:
public class MyClass {
@Autowire
private SomeBean sb;
}
public class Main {
public static void main(String[] args) {
ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
MyClass myClass = new MyClass();
ctx.getAutowireCapableBeanFactory().autowireBeanProperties(myClass, AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, true);
}
One alternative if you don't like AOP / AspectJ is to create a MyClassFactory bean that is responsible for creating new instances of MyClass, and inject a SomeBean reference into them (either by constructor injection or method injection), e.g.
@Service
public class MyClassFactory {
@Autowired
private SomeBean sb;
public MyClass createMyClassWithSomeBean() {
MyClass myClass = new MyClass();
myClass.setSomeBean(sb);
return myClass;
}
}
public class Main {
public static void main(String[] args) {
ApplicationContext ctx = new ClassPathXmlApplicationContext("spring.xml");
MyClassFactory factory = ctx.getBean(MyClassFactory.class);
MyClass myClass = factory.createMyClassWithSomeBean();
}
}
