Spring Qualifier and property placeholder

Question

Does anyone know if I should be able to use property placeholder as an expression in a Qualifier? I can't seem to get this working.

I am using spring 3.0.4.

@Controller public class MyController {    @Autowired    @Qualifier("${service.class}")    Service service; }  @Service @Qualifier("ServiceA") ServiceA implements Service {    public void print() {        System.out.println("printing ServiceA.print()");    }  }  @Service @Qualifier("ServiceB") ServiceB implements Service {    public void print() {       System.out.println("printing ServiceB.print()");    }  } 

XML:

<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">         <property name="location" value="file:/etc/config.properties"/> </bean> 

config.properties:

config.properties service.class=serviceB 

Answer 1

This works. You can leave off the service names if you just use the default spring bean name. serviceA vs ServiceA, etc.

@Controller class MyController { @Autowired(required=false) @Qualifier("Service") Service service;  public static void main(String[] args) {    ApplicationContext context = new ClassPathXmlApplicationContext("app-ctx.xml", MyController.class);    for(String s:context.getBeanDefinitionNames()){        System.out.println(s);        for(String t:context.getAliases(s)){            System.out.println("\t" + t);        }    }    context.getBean(MyController.class).service.print();   } }  public interface Service {     void print(); }  @Service(value="ServiceA") public class ServiceA implements example.Service {     public void print() {         System.out.println("printing ServiceA.print()");     }  }  @Service(value="ServiceB") public class ServiceB implements example.Service {     public void print() {         System.out.println("printing ServiceB.print()");     }  } 

XML:

<beans>     <alias name="${service.class}" alias="Service"/>     <context:property-placeholder location="example/app.properties"/>     <context:component-scan base-package="example"/> <beans> 

Props:

service.class=ServiceB