prescriptionbean.java

来自「100多M的J2EE培训内容」· Java 代码 · 共 95 行

package bible.ejb.message.prescription;

import java.io.Serializable;
import java.rmi.RemoteException;
import javax.ejb.EJBException;
import javax.ejb.MessageDrivenBean;
import javax.ejb.MessageDrivenContext;
import javax.ejb.CreateException;
import javax.naming.*;
import javax.jms.*;

import org.xml.sax.*;
import org.xml.sax.helpers.*;


public class PrescriptionBean implements MessageDrivenBean,javax.jms.MessageListener {


    public  PrescriptionBean() {

    }

    public void setMessageDrivenContext(MessageDrivenContext mdc)
    {


    }

    public void ejbCreate() {

    }

     public void onMessage(Message incomingMsg) {
        TextMessage msg =   null;
    String msgType  =   null;
    String msgPayload = null;

        try {
            if (incomingMsg instanceof TextMessage) {

            msg = (TextMessage) incomingMsg;
        msgType = msg.getStringProperty("neccesity");
        msgPayload = msg.getText();

        if (msgType.equals("immediate"))
          processPrescription(msgPayload);

            } else {
              System.out.println("Only accepting text messages");
            }
        } catch (JMSException e) {
            e.printStackTrace();
        } catch (Throwable te) {
            te.printStackTrace();
        }
    }

    public void ejbRemove() {

    }


  public void processPrescription(String prescriptionXmlDocument)
  {

      try {
      PrescriptionXmlParser parser = new PrescriptionXmlParser();

      // Create SAX 2 parser...
        XMLReader xr = XMLReaderFactory.createXMLReader("org.apache.xerces.parsers.SAXParser");

        // Set the ContentHandler...
        xr.setContentHandler(parser);

        xr.parse( prescriptionXmlDocument );

    Prescription currentPrescription = parser.getPrescription();

    // Now that you have the prescription object
    // you can make calls to various backend order
    // management systems

      }
      catch (Exception e)
      {

          System.out.println("Message not parsed correctly");
      }
  }



}