Configuring auto-discovery for spring beans is quite easy and straight forward in the spring application. With auto-discovery in place, you won’t have to manually register the beans in spring config files. This is a way to minimize the xml verbosity in your application. You just need to add the following line to the spring config file and it’s done.
<context:component-scan base-package="impls.di.annotation.reference"/>
the above line make spring scan through the edu.jft.prashant.utils package and will register the classes as beans that are annotated with:
- @Component
- @Controller
- @Repository
- @Service
- Any custom annotation that is itself annotated with @Component.
So, let’s modify the SimplePoem in this example for auto-discovery. Annotate it with @Component like:
@Component("poem")
public class SimplePoem implements Poem {
@Value("${poem}")
String poem;
public void recite(){
System.out.println(poem);
}
}
With our class marked with @Component, component-scan will scan the package and will register it as a bean in the spring context.
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