MyServlet.java :  » HTTP » ostas-blog-src » com » blogspot » ostas » spring » Java Open Source

package com.blogspot.ostas.spring;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.springframework.context.ApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

import com.blogspot.ostas.spring.beans.ClassWithSimpleBeanInjection;
import com.blogspot.ostas.spring.beans.SimpleBean;

public class MyServlet extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet 
{
   static final long serialVersionUID = 1L;
   private static final Logger logger = Logger.getLogger(MyServlet.class.getName());   
   private ApplicationContext context = null;
   //private SimpleBean simpleBean = null;
   private ClassWithSimpleBeanInjection simpleBean = null;

   @Override  
   public void init()
   {
     try 
     {
      super.init();
      context = WebApplicationContextUtils.getWebApplicationContext(getServletContext());
      //singleton
      //simpleBean = (SimpleBean) context.getBean("simpleBean");
      //prototype
      //simpleBean = (SimpleBean) context.getBean("simpleBeanPrototype");
      //with injection
      simpleBean = (ClassWithSimpleBeanInjection) context.getBean("classWithSimpleBeanInjection");
      
      logger.info("Context started. servlet.init() called");
      } 
    catch (ServletException e) 
    {
      e.printStackTrace();
    }     
   }
   public MyServlet() 
  {
    super();
    logger.info("Servlet coustructor called");
  }
  private String s;
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException 
  {
    PrintWriter out = response.getWriter();
    
    simpleBean = (ClassWithSimpleBeanInjection) context.getBean("classWithSimpleBeanInjection");
    s = simpleBean.injectedBeanMethodCall();
    
    try 
    {
      out.printf("%s\n", s);
    } 
    catch (Exception e) 
    {
      e.printStackTrace();
    }
  }                
}