Shervin Asgari Shervin Asgari - 1 month ago 17
Java Question

@Autowired works but not @Inject

I have a Resource which injects the following class

@Component
public class CustomDozerBeanMapper implements Mapper {
private final DozerBeanMapper beanMapper;

public CustomDozerBeanMapper() {
this.beanMapper = new DozerBeanMapper();
BeanMappingBuilder builder = new BeanMappingBuilder() {
protected void configure() {
//some mapping stuff
}
};
beanMapper.addMapping(builder);
}

@Override
public <T> T map(Object o, Class<T> aClass) throws MappingException {
return beanMapper.map(o, aClass);
}

@Override
public void map(Object o, Object o1) throws MappingException {
beanMapper.map(o, o1);
}

@Override
public <T> T map(Object o, Class<T> aClass, String s) throws MappingException {
return beanMapper.map(o, aClass, s);
}

@Override
public void map(Object o, Object o1, String s) throws MappingException {
beanMapper.map(o, o1, s);
}
}


In my applicationContext.xml I have declared

<context:annotation-config/>
<context:component-scan base-package="foo.bar"/>
<bean id="customDozerMapper" class="foo.bar.CustomDozerBeanMapper" />


Then in our resource I inject it

class SomeResource {
@Inject CustomDozerMapper customDozerMapper;

//We have loads of other Injects which work just fine, only this class has problems
}





Caused by: A MultiException has 1 exceptions. They are:
1. org.glassfish.hk2.api.UnsatisfiedDependencyException: There was no object available for injection at SystemInjecteeImpl(requiredType=CustomDozerBeanMapper,parent=SomeResource,qualifiers={},position=-1,optional=false,self=false,unqualified=null,1098507248)

at org.jvnet.hk2.internal.ThreeThirtyResolver.resolve(ThreeThirtyResolver.java:75)
at org.jvnet.hk2.internal.Utilities.justInject(Utilities.java:947)
at org.jvnet.hk2.internal.ServiceLocatorImpl.inject(ServiceLocatorImpl.java:975)
at org.jvnet.hk2.internal.ServiceLocatorImpl.inject(ServiceLocatorImpl.java:965)
at org.glassfish.jersey.server.spring.SpringComponentProvider$SpringManagedBeanFactory.provide(SpringComponentProvider.java:191)
at org.jvnet.hk2.internal.FactoryCreator.create(FactoryCreator.java:153)
at org.jvnet.hk2.internal.SystemDescriptor.create(SystemDescriptor.java:471)
at org.jvnet.hk2.internal.PerLookupContext.findOrCreate(PerLookupContext.java:70)
at org.jvnet.hk2.internal.Utilities.createService(Utilities.java:2072)
at org.jvnet.hk2.internal.ServiceLocatorImpl.internalGetService(ServiceLocatorImpl.java:761)
at org.jvnet.hk2.internal.ServiceLocatorImpl.getService(ServiceLocatorImpl.java:700)
at org.glassfish.jersey.internal.inject.Injections.getOrCreate(Injections.java:172)
at org.glassfish.jersey.server.model.MethodHandler$ClassBasedMethodHandler.getInstance(MethodHandler.java:284)
at org.glassfish.jersey.server.internal.routing.PushMethodHandlerRouter.apply(PushMethodHandlerRouter.java:74)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:109)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:112)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:112)


Now if I change and use @Autowired, it works fine
We are using Spring for dependency management, but for some reason h2k is being used, and I get the following exception

Can anyone please explain what the problem might be?

Why does it work with @Autowired and not @Inject

Why is h2k being used, and not Spring?

Answer

Probably, the problem may be because of 2 bean declarations (one in the XML configuration and the another one with @Component) and a DI container couldn't able to pick up one of them.

All solutions that are available here:

  1. removing one of the bean definitions (I'd prefer the XML one)
  2. specifying a bean by the @Qualifier or @Named annotation