NoSuchBeanDefinitionException raised even though #Autowire and # repository # service are properly configured - spring

Question

My controller class:
#Controller
public class UsersController
{
#Autowired
TechRequestService techrequestservices;
#RequestMapping(value="/service_request", method=RequestMethod.POST)
public #ResponseBody Map<String,Object> SaveServiceRequest(#Valid Servicerequest servicerequest,BindingResult result){
Map<String,Object> map = new HashMap<String,Object>();
Object obj=new Object();
if(result.hasErrors())
{
for (Object object : result.getAllErrors()) {
if(object instanceof FieldError) {
FieldError fieldError = (FieldError) object;
obj= (fieldError.getDefaultMessage());
}
map.put("status","400");
map.put("message",obj);
return map;
}}
techrequestservices.save_servicerequest(servicerequest);
map.put("status","200");
map.put("message","Your record have been saved successfully");
return map;
}
}
My Service Implementation class:
#Service
public class TechRequestServiceImpl implements TechRequestService{
#Autowired
TechRequestServiceDao techrequestservicedao;
public boolean save_servicerequest(Servicerequest servicerequest) {
return techrequestservicedao.save_servicerequest(servicerequest);
}
public List<Servicerequest> list() {
// TODO Auto-generated method stub
return techrequestservicedao.list();
}
}
My DaoImpl Class:
#Repository
#Transactional
public class TechRequestServiceDaoImpl implements TechRequestService {
#Autowired
SessionFactory session;
#Override
public boolean save_servicerequest(Servicerequest servicerequest) {
// TODO Auto-generated method stub
session.getCurrentSession().saveOrUpdate(servicerequest);
return true;
}
#Override
public List<Servicerequest> list() {
return session.getCurrentSession().createQuery("from Search_type_case").list();
}
}
The request comes through ajax and the pojo variables are getting their values initialized properly as i confirmed it by placing a print statement in ever setter method of pojos. The full stack trace of the exception as follows:
SEVERE: Exception sending context initialized event to listener instance of class
[org.springframework.web.context.ContextLoaderListener]
org.springframework.beans.factory.BeanCreationException: Error
creating bean with name 'usersController': Injection of autowired
dependencies failed; nested exception is
org.springframework.beans.factory.BeanCreationException: Could not
autowire field: com.servicesapi.TechRequestService
com.controllers.UsersController.techrequestservices; nested exception
is org.springframework.beans.factory.BeanCreationException: Error
creating bean with name 'techRequestServiceImpl': Injection of
autowired dependencies failed; nested exception is
org.springframework.beans.factory.BeanCreationException: Could not
autowire field: com.daoapi.TechRequestServiceDao
com.servicesimpl.TechRequestServiceImpl.techrequestservicedao; nested
exception is
org.springframework.beans.factory.NoSuchBeanDefinitionException: No
qualifying bean of type [com.daoapi.TechRequestServiceDao] found for
dependency: expected at least 1 bean which qualifies as autowire
candidate for this dependency. Dependency annotations:
{#org.springframework.beans.factory.annotation.Autowired(required=true)}
at
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
at
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at
org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at
org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)
at
org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839)
at
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)
at
org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:444)
at
org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:326)
at
org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)
at
org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4792)
at
org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5256)
at
org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at
org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1421)
at
org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1411)
at java.util.concurrent.FutureTask.run(Unknown Source) at
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at
java.lang.Thread.run(Unknown Source)

Answer 1

Is your Component-Scan set correctly to scan packages inside a given path? Try setting the component-scan in the spring xml configuration to scan the relevant packages as follows:
<context:component-scan base-package="com.main"/>
where your dao, service and controller packages are located inside com.main. This will scan all files under com.main while checking for bean definations.

Answer 2

Both TechRequestServiceImpl and TechRequestServiceDaoImpl implements TechRequestService therefore there are two beans of type TechRequestService in the context, but none of type: TechRequestServiceDao.
To fix: TechRequestServiceDaoImpl should implement TechRequestServiceDao