Exception while deploying

[Trilochan Bharadwaj]

I use following class hierarchy for Service:

public class ActorModelService implements IService<DefaultActorModel, Long> {

	private static final long serialVersionUID = 1L;
	private ActorModelGenericDAO actorModelGenericDAO;

        @Override
	@Transactional
	public void saveOrUpdate(final DefaultActorModel model) {
		actorModelGenericDAO.saveOrUpdate(model);
	}

	public final ActorModelGenericDAO getActorModelGenericDAO() {
		return actorModelGenericDAO;
	}

	public final void setActorModelGenericDAO(final ActorModelGenericDAO actorModelGenericDAO) {
		this.actorModelGenericDAO = actorModelGenericDAO;
	}
}

And refer to it in controller resource:

@Path(PathPlaceHolder.RESOURCE_PATH_ACTOR)
public class ActorModelResource implements IActorModelResource {

	private ActorModelService service;

	public ActorModelService getService() {
		return service;
	}

	public void setService(final ActorModelService actorModelService) {
		this.service = actorModelService;
	}

	public void batchDelete(final String literal) {
		throw new UnsupportedOperationException("Not Implemented yet!");
	}

	public void batchSaveOrUpdate(final String literal) {
		throw new UnsupportedOperationException("Not Implemented yet!");
	}

	public void delete(final String literal) {
		throw new UnsupportedOperationException("Not Implemented yet!");
	}

	@POST
	@Consumes( { MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
	@Produces( { MediaType.APPLICATION_JSON })
	public String saveOrUpdate(final String literal) {
		final JSONObject jsonObject = JSONObject.fromObject(literal);
		final DefaultActorModel actor = new DefaultActorModel(Long.valueOf((String) jsonObject.get("id")));
		actor.setName((String) jsonObject.get("name"));
		service.saveOrUpdate(actor);
		return "{result:success}";
	}
}

I simply refer to this in my spring resource config xml (for controllers and restful resource configuration) like this:

<!--  CONTROLLERS GO HERE! -->
	<bean id="actorModelResource" class="com.inews.resource.impl.ActorModelResource">
		<property name="service" ref="actorModelService" />
	</bean>

However when I package and deploy the jar on JBoss, I get following exception:

Caused by: org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type '$Proxy310 implementing com.inews.service.IActorModelService,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised' to required type 'com.inews.service.impl.ActorModelService' for property 'service'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [$Proxy310 implementing com.inews.service.IActorModelService,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised] to required type [com.inews.service.impl.ActorModelService] for property 'service': no matching editors or conversion strategy found
	at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:462)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1351)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1310)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1067)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:511)
	... 88 more
Caused by: java.lang.IllegalStateException: Cannot convert value of type [$Proxy310 implementing com.inews.service.IActorModelService,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised] to required type [com.inews.service.impl.ActorModelService] for property 'service': no matching editors or conversion strategy found
	at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:289)
	at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:154)
	at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:452)
	... 92 more

What am I missing ...? My guess is that I am doing something fundamentally wrong in the code ... Any suggestions?


Any help would appreciable ...

[Alaa Nassef]

You have to code to an interface, and not to the concrete class/implementation. Spring doesn't inject an object of your class, but in place injects a proxy to your class. This is needed for Aspect Oriented Programming (AOP). The proxy implements the interfaces that your class implements, but is not an instance of your class. Just code to the interface, and your problem should be solved (I guess). Another thing that might solve the problem is to add the following line to your bean definition

<aop:scoped-proxy proxy-target-class="false" />

Of course you'll need to add the aop name-space to your XML file. As I have said that the second solution might solve the problem, but I do not guarantee this. We have used this to solve a similar problem with DWR, but that's another story.

[Trilochan Bharadwaj]

What do you mean code to an interface ... I am not following; does that mean, I use:

public final class ActorResource{
private IService<DefaultActorModel, Long> service;

}

instead of using DefaultActorModelService?

Can you clarify in the snippet please?

Appreciate your help!
Trilochan

[Costi Ciudatu]

$Proxy310 implementing com.inews.service.IActorModelService

It looks like you already have an interface for the ActorModelService (which probably extends IService<DefaultActorModel, Long>).
If so, you should make the ActorModelService class implement the IActorModelService (so it will have the same interace as your declared service bean).
And then use:

public final class ActorResource{  
    private IApplicationService service;  
}

[Alaa Nassef]

Exactly. Thanks Costi

[Trilochan Bharadwaj]

Replaced Concrete Implementation with Interface and also replaced

IService<DefaultActorModel, Long>

and it worked fine ... Cool thanks All!

One more thing I noted since I am deploying on JBOSS; JBOSS's JNDI binding for UserTransaction are

java:/UserTransaction

as opposed to

java:/comp/UserTransaction 

. Once those changes were made it all went well.

Again appreciate everyone's help!

[Alaa Nassef]

Glad to be of help