Question

I have:

@Component
class MyDecorator{
  private Cache cache;
  /*
  some wrapped methods like get put remove
  */
}

Is it possible to autowire MyDecorator in different places with different cache?
I can configure XML like this:

<bean id="id1" class="MyDecorator ">
    <property name="cache" value="Cache1" />
</bean>
<bean id="id2" class="MyDecorator ">
    <property name="cache" value="Cache2" />
</bean>

But is there more elegance way without addition of xml configs, only with annotation?

Correct code should be

    @Configuration
    public class AppConfig { 
@Bean
    public MyAdapter adaptedCache2() {
        return new MyAdapter (cache1);
    }

    @Bean
    public MyAdapter adaptedCache2() {
        return new MyAdapter (cache2);
    }} 

according to specs will be generated two beans adaptedCache1 and adaptedCache2
and now i can
autowire those beans with qualifiers adaptedCache1 and adaptedCache2

Answer 1

With Java configuration (Spring 3.1) you can write:

@Bean
public MyDecorator decoratedCache1() {
    return new MyDecorator(cache1);
}

@Bean
public MyDecorator decoratedCache2() {
    return new MyDecorator(cache2);
}

Of course in this case MyDecorator does not need @Component:

@Component
class MyDecorator{
    private final Cache cache;

    public MyDecorator(Cache cache) {
        this.cache = cache;
    }

}