Help with MDB

Question

I have a message driven bean, which is listening to a queue for a particular message. On receiving the message it should invoke a remote interface In a session bean)for further business action, basically a validation done by the session bean.
How can I invoke that and pass the message to the session bean.?
the session bean code is below and in has the DriverValidate Remote interface.
package dlr.ecom.creditapp.backend.business;
//import dlr.ecom.creditapp.backend.database.DBSelectRow;
import dlr.ecom.creditapp.backend.database.wrapper.DbSystemAcc;
* Bean implementation class for Enterprise Bean: DriverValidate
public class DriverValidateBean implements javax.ejb.SessionBean {
     private javax.ejb.SessionContext mySessionCtx;
     * getSessionContext
     public javax.ejb.SessionContext getSessionContext() {
          return mySessionCtx;
     * setSessionContext
     public void setSessionContext(javax.ejb.SessionContext ctx) {
          mySessionCtx = ctx;
     * ejbCreate
     public void ejbCreate() throws javax.ejb.CreateException {
     * ejbActivate
     public void ejbActivate() {
     * ejbPassivate
     public void ejbPassivate() {
     * ejbRemove
     public void ejbRemove() {
     public String execute(String msg){
          try {
     //String request = "<InquiryRequest><SystemId>999999</SystemId><DealerId>999999</DealerId><DataType>DB</DataType><AccountId>TEST1</AccountId><PartnerId>DT</PartnerId><TransType>IMPORT</TransType><UserId>TEST1</UserId><ClientIp>139.126.12.54</ClientIp></InquiryRequest>";
     String response;
          System.out.println("Input msg" + msg);
          ValdatDealer validatedealer = new ValdatDealer();
          response = validatedealer.checkDealer(msg);
          System.out.println(response);
          return response;
          /*DbSystemAcc sa = new DbSystemAcc("999999","999999","DT","TEST1");
          System.out.println("Validation"+sa.getDmsIp());
          //DBSelectRow[] dr = DBWrapper.getInstance().getDBLocalHome().create().TaskSelect("Select * from DB2Admin.dealersystem");
          //System.out.println(dr.length);
          catch (Exception exp){
               exp.printStackTrace();
          return new String();
And the MDB code is below
package dlr.ecom.creditapp.backend.framework;
import javax.jms.*;
import javax.naming.*;
import javax.naming.directory.*;
import javax.rmi.PortableRemoteObject;
* Bean implementation class for Enterprise Bean: CreditAppValidate
public class CreditAppValidateBean
     implements javax.ejb.MessageDrivenBean, javax.jms.MessageListener {
     private javax.ejb.MessageDrivenContext fMessageDrivenCtx;
     * getMessageDrivenContext
     public javax.ejb.MessageDrivenContext getMessageDrivenContext() {
          return fMessageDrivenCtx;
     * setMessageDrivenContext
     public void setMessageDrivenContext(javax.ejb.MessageDrivenContext ctx) {
          fMessageDrivenCtx = ctx;
     * ejbCreate
     public void ejbCreate() {
     * onMessage
     public void onMessage(Message inMessage) {
     TextMessage msg = null;
     try {
          if (inMessage instanceof TextMessage) {
               msg = (TextMessage)inMessage;
               DriverValidate validate = (DriverValidate)msg.getText();
                         // Invoke DriverValidation
               System.out.println("Invoking MDB onMessage() now.");
               System.out.println("Message Object is: " + msg);
               System.out.println("Text message is: " + ((TextMessage)msg).getText());
               System.out.println();
          } else {
     }catch (JMSException e) {
               System.out.println("Whoops! A JMSException occurred: " + e);
               e.printStackTrace();
     * ejbRemove
     public void ejbRemove() {
thanks

Answer 1

Hi,
You have to lookup your session bean via jndi. Your MDB code should be something like:
// get the text from message
String toValidate = msg.getText();
// obtain a reference to your DriverValidateBean
InitialContext jndi = new InitialContext();
Object lObject = jndi.lookup("ejb/driver/ DriverValidateBean");
DriverValidateBeanHome myDriverValidateBeanHome = (DriverValidateBeanHome) PortableRemoteObject.narrow(lObject, DriverValidateBeanHome.class);
DriverValidateBean validator = myDriverValidateBeanHome.create();
// perform operations
validator.execute ( toValidate );
Hope it helps
Arnaud
www.arjuna.com