Issue
I am using java based configuration. I have following code setup which showing error.
public class MyWebInitializer implements WebApplicationInitializer {
public static Logger logger = Logger.getLogger(MyWebInitializer.class);
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
logger.info("initializing web context");
AnnotationConfigWebApplicationContext annotationConfigWebApplicationContext = new AnnotationConfigWebApplicationContext();
annotationConfigWebApplicationContext.register(FrontController.class);
ServletRegistration.Dynamic dispatcher = servletContext.addServlet("dispatcher",
new DispatcherServlet(annotationConfigWebApplicationContext));
dispatcher.setLoadOnStartup(1);
dispatcher.addMapping("/");
logger.info("On start up method complete");
}
}
Front Controller setup:
@Configuration
@EnableWebMvc
@ComponentScan("com.ishwor.crm.controller,com.ishwor.crm.entity,com.ishwor.crm.DAO")
@PropertySource("classpath:hibenrate.properties")
@EnableTransactionManagement
public class FrontController implements WebMvcConfigurer {
public static Logger logger = Logger.getLogger(FrontController.class);
@Autowired
Environment environment;
@Bean
InternalResourceViewResolver internalResourceViewResolver() {
logger.info("inside view resolver function ");
InternalResourceViewResolver resolver = new InternalResourceViewResolver();
resolver.setPrefix("/WEB-INF/views/");
resolver.setSuffix(".jsp");
resolver.setViewClass(JstlView.class);
logger.info("View Resolving complete ");
return resolver;
}
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
logger.info("Inside static resource handler");
// for css and js
registry.addResourceHandler("/resources/**").addResourceLocations("/WEB-INF/resources/")
.setCacheControl(CacheControl.maxAge(2, TimeUnit.HOURS).cachePublic());
logger.info("static resource handling complete");
}
// hibernate configuration
@Bean(name = "sessionFactory")
public LocalSessionFactoryBean sessionBean() {
logger.info("Creating sesion bean");
LocalSessionFactoryBean bean = new LocalSessionFactoryBean();
bean.setDataSource(dataSource());
bean.setPackagesToScan(
new String[] { "com.ishwor.crm.entity", "com.ishwor.crm.DAO", "com.ishwor.crm.DAOImpl" });
bean.setHibernateProperties(hibernateProperties());
logger.info("Creating sesion bean=== successfull!!!");
return bean;
}
@Bean
public DataSource dataSource() {
logger.info("Datasource method invoked");
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(environment.getRequiredProperty("jdbc.driverClassName"));
dataSource.setUsername(environment.getRequiredProperty("jdbc.username"));
dataSource.setPassword(environment.getRequiredProperty("jdbc.password"));
dataSource.setUrl(environment.getRequiredProperty("jdbc.url"));
logger.info("DataSource Invoke complete");
return dataSource;
}
private Properties hibernateProperties() {
Properties properties = new Properties();
logger.info("setting properties for hibernated");
properties.put("hibernate.dialect", environment.getRequiredProperty("hibernate.dialect"));
properties.put("hibernate.show_sql", environment.getRequiredProperty("hibernate.show_sql"));
properties.put("hibernate.format_sql", environment.getRequiredProperty("hibernate.format_sql"));
properties.put("hibernate.hbm2ddl.auto", environment.getRequiredProperty("hibernate.hbm2ddl.auto"));
logger.info("setting properties completed");
return properties;
}
@Bean
public HibernateTransactionManager getTransactionManager() {
HibernateTransactionManager transactionManager = new HibernateTransactionManager();
transactionManager.setSessionFactory(sessionBean().getObject());
return transactionManager;
}
}
Entity Setp:
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name = "customer")
public class Customer {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "id")
private long id;
@Column(name = "first_name")
private String firstName;
@Column(name = "last_name")
private String lastName;
@Column(name = "email")
private String email;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public Customer() {
}
public Customer(String firstName, String lastName, String email) {
this.firstName = firstName;
this.lastName = lastName;
this.email = email;
}
@Override
public String toString() {
return "Customer [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + ", email=" + email + "]";
}
}
DAO Setup:
package com.ishwor.crm.DAO;
import java.util.List;
import com.ishwor.crm.entity.Customer;
public interface CustomerDAO {
public List<Customer> getCustomer();
}
DAOImpl setup
package com.ishwor.crm.DAOImpl;
import java.util.List;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.query.Query;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
import com.ishwor.crm.DAO.CustomerDAO;
import com.ishwor.crm.entity.Customer;
@Repository
public class CustomerDAOImpl implements CustomerDAO {
@Autowired
@Qualifier("sessionFactory")
private SessionFactory sessionFactory;
public CustomerDAOImpl() {
}
@Override
@Transactional
public List<Customer> getCustomer() {
// get current hibernate Session
Session currenSession = sessionFactory.getCurrentSession();
// create Query
Query<Customer> myQuery = currenSession.createQuery("from customer", Customer.class);
// execute query and get result
return myQuery.getResultList();
}
}
But Using this DAO as Autowired show the Error I have following customerController setup:
package com.ishwor.crm.controller;
import java.util.List;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import com.ishwor.crm.DAO.CustomerDAO;
import com.ishwor.crm.entity.Customer;
@Controller()
@RequestMapping("/customer")
public class CustomerController {
public static Logger logger = Logger.getLogger(CustomerController.class);
// Autowired customerDAO
@Autowired
private CustomerDAO customerDAO;
@RequestMapping("/list")
public String customerHome(Model model) {
logger.info("customer index metho browsed");
List<Customer> customer = customerDAO.getCustomer();
model.addAttribute("customer", customer);
return "/customer/index";
}
}
Note Without autowiring on controller class code working fine. Should I Used the @service annotation using other one more class and interface in order to this work .
Solution
Scanning of components failed.
Add com.ishwor.crm.DAOImpl
package in @ComponentScan
in the code :
@ComponentScan("com.ishwor.crm.controller,com.ishwor.crm.entity,com.ishwor.crm.DAO,com.ishwor.crm.DAOImpl")
Replace CustomerDAOImpl
by CustomerDAO
in the CustomerController
. It will work.
@Autowired
private CustomerDAO customerDAO;
Answered By - Anish B.