@Autowired issues when running junits.

[rasperin]

Hey guys, I have configured a bean in my xml (and I see it getting instantiated on load)

<bean id="cache" class="my.correct.path.CacheImpl" autowire-candidate="true" autowire="byName" name="cache">
		<constructor-arg>
			<util:properties id="properties" location="classpath:META-INF/spring/cache/cache.properties" />
		</constructor-arg>
	</bean>

I've created a common Cache interface for different caching systems, it implements this:

@Component
public interface Cache<T> {
	public Map<Object, T> getRegion(CacheEnum e);
	public T get(Object key, CacheEnum c);
	public void put(Object key, T value, CacheEnum c);
}

I want to autowire it into the project so I try to do this:

@Component
public class TypedCacheImpl<T> implements Serializable {

	private static final long serialVersionUID = -6094798210446446133L;

	@Autowired
	private Cache<T> cache;

	private Repository repo;
	
	@Autowired
	public TypedCacheImpl(Repository repo) {
		this.repo = repo;
	}
	
	@Autowired
	public TypedCacheImpl(Repository repo, Cache<T> cache) {
		this.repo = repo;
		this.cache = cache;
	}
	
	public T findById(String id) {
		T cachedObj = getCache().get(id, CacheEnum.Region);//NPE, getCache is null
		if (cachedObj == null){
			cachedObj = repo.findById(id);
			if(cachedObj != null)getCache().put(id, cachedObj, CacheEnum.Region);
		}
		return cachedObj;
	}
	
	public void setCache(Cache<T> cache){
		this.cache= cache;
	}
	
	public Cache<T> getCache(){
		return cache;
	}

}

CacheImpl.java

@Component
public class CacheImpl<T> extends CacheFactory implements Cache<T>, Serializable  {
    ...
}

I also have the context scan on both CacheImpl and Cache object. (Local implementations) so my question is: Why isn't autowire working in the first place and how do I autowire the specific CacheImpl when I do @Autowired Cache<T> cache; ? I don't want to do Cache cache = (Cache) ApplicationContext.getBean("cache");

Thanks!

[Marten Deinum]

For starters you have 2 instances of your cache, @Autowired will only work with a single instance (or you need to specify the name with @Qualifier). You have 2 instances because you define 1 instance in your xml and the other one is detected using component scanning.