service class not executing in spring

[maheedar sand]

Hi,

I am new to spring 3.0 and following spring in action 3rd edition. I am trying to execute spring MVC application as described in chapter 7. I am getting a null pointer exception when I run the application in STS.
CODE

HomeController

     package com.habuma.spitter.mvc;

import java.util.Map;

import javax.inject.Inject;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.habuma.spitter.service.SpitterService;

@Controller
public class HomeController {

  private SpitterService spitterService;

  public HomeController()  {}

  @Inject
  public HomeController(SpitterService spitterService) {
    this.spitterService = spitterService;
  }
  
  @RequestMapping(value={"/","/home"}, method=RequestMethod.GET)
  public String showHomePage(Map<String, Object> model) {
    model.put("spittles", 
              spitterService.getRecentSpittles(spittlesPerPage));
    return "home";
  }


  //<start id="spittlesPerPage"/> 
  public static final int DEFAULT_SPITTLES_PER_PAGE = 25;
  
  private int spittlesPerPage = DEFAULT_SPITTLES_PER_PAGE;
  
  public void setSpittlesPerPage(int spittlesPerPage) {
    this.spittlesPerPage = spittlesPerPage;
  }
  
  public int getSpittlesPerPage() {
    return spittlesPerPage;
  }
  //<end id="spittlesPerPage"/> 
}

     

SpitterServiceImpl.java

     package com.habuma.spitter.service;

import java.util.List;

import com.habuma.spitter.domain.Spittle;
import com.habuma.spitter.persistence.SpitterDao;

public class SpitterServiceImpl implements SpitterService {

	@Override
	public List<Spittle> getRecentSpittles(int count) {
		System.out.println("Inside getRecentSpittles method");
		List<Spittle> recentSpittles = spitterDao.getRecentSpittle();
		
		System.out.println("recentSpittles: " + recentSpittles.size());
		
		return recentSpittles;
	}
	
	private SpitterDao spitterDao;

	public void setSpitterDao(SpitterDao spitterDao) {
		this.spitterDao = spitterDao;
	}
}

     

web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"> <context-param> <param-name>contextConfigLocation</param-name> <param-value> classpath:resources/spitter-service.xml classpath:resources/persistence-context.xml classpath:resources/spitter-data.xml </param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <servlet> <servlet-name>spitter</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>spitter</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>

spitter-servlet.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> <mvc:resources location="/resources/" mapping="/resources/**"/> <mvc:annotation-driven/> <context:component-scan base-package="com.habuma.spitter.mvc"/> <!-- <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/WEB-INF/views"></property> <property name="suffix" value=".jsp"></property> </bean> --> <bean class="org.springframework.web.servlet.view.tiles2.TilesViewResolver"></bean> <bean class="org.springframework.web.servlet.view.tiles2.TilesConfigurer"> <property name="definitions"> <list> <value>/WEB-INF/views/**/views.xml</value> </list> </property> </bean> </beans>


What I found is service class is not injected at runtime. Please help me!!!

Thanks and Regards,
sathish.g.

[maheedar sand]

Hi,

I'm able to figure out a way...
I removed @Inject which is used for service and done the same injection using @Autowired annotation and the application is working fine


Thanks for everyone for their extended cooperation...

Thanks and Regards,
sathish.g.