package dk.thoerup.messagedriven;

import java.io.IOException;

import javax.annotation.Resource;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


@WebServlet(name = "ProducerServlet", urlPatterns = { "/ProducerServlet" })
public class ProducerServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    
    // why doesn't @Resource work ??
    @Resource(mappedName = "jms/helloFactory")
    private static ConnectionFactory connectionFactory;

    @Resource(mappedName = "jms/hello")
    private static Queue queue;
    

    @Override
    public void init() throws ServletException {
    	
    	try {
    		InitialContext ic = new InitialContext();
    		if (connectionFactory == null) {
    			connectionFactory = (ConnectionFactory)ic.lookup("jms/helloFactory");
    			System.out.println("@Resource failed for connection factory");
    		}
    		if (queue == null) {
    			queue = (Queue)ic.lookup("jms/hello");
    			System.out.println("@Resource failed for queue");
    		}
    	} catch(NamingException ne) {
    		throw new ServletException(ne);
    	}
    }


	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		try {

			Connection connection = connectionFactory.createConnection();			
			
	        
	        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
	        MessageProducer producer = session.createProducer(queue);
	        TextMessage message = session.createTextMessage();
	        message.setStringProperty("name", "World!!");
	        message.setText("this is the body");
	        producer.send(message);
	        response.getWriter().print("Message sent" );
		} catch (Exception e) {
			throw new ServletException(e);
		}
	}


}