Hi i've circled the web but I just cant get this going.
I have a MDB listening from a queue, receives the message and the call the
respective process model on a Stateless Session Bean. I'm using XDoclet and
can't seam to get this to work.
The MDB Bean looks like this:
ackage is.scholar.orchestrator.ejb;
|
| import is.scholar.orchestrator.interfaces.MainOrchestratorLocal;
| import is.scholar.orchestrator.interfaces.MainOrchestratorUtil;
|
| import javax.ejb.CreateException;
| import javax.ejb.EJBException;
| import javax.ejb.MessageDrivenBean;
| import javax.ejb.MessageDrivenContext;
| import javax.jms.JMSException;
| import javax.jms.Message;
| import javax.jms.MessageListener;
| import javax.jms.TextMessage;
| import javax.naming.InitialContext;
| import javax.naming.NamingException;
|
| /**
| * XDoclet-based Message Driven entity bean.
| *
| * To generate EJB related classes using XDoclet:
| *
| * - Add Standard EJB module to XDoclet project properties
| * - Customize XDoclet configuration
| * - Run XDoclet
| *
| * Below are the xdoclet-related tags needed for this EJB.
| *
| * @ejb.bean name="UIOutboxProcessorMDB"
| * display-name="UIOutboxProcessorMDB"
| * description="MDB that retreives transactionaly a message from
its outbox queue and sends it to the corresponding method en the orchestrator"
| * destination-type="javax.jms.Queue"
| * acknowledge-mode="Auto-acknowledge"
| * transaction-type = "Container"
| * subscription-durability = "Durable"
| *
| * @jboss.destination-jndi-name name="queue/UIOutboxQueue"
| *
| * @ejb.ejb-ref ejb-name="MainOrchestrator"
| * type="Session"
| * view-type="local"
| * ref-name="MainOrchestrator"
| *
| * @jboss.ejb-local-ref ref-name="MainOrchestrator"
| * jndi-name="ejb/MainOrchestrator"
| */
| public class UIOutboxProcessorMDB implements MessageDrivenBean,
MessageListener {
|
| private static final long serialVersionUID = 4883475689156890475L;
|
| /** The MessageDrivenContext */
| private MessageDrivenContext context;
|
| private InitialContext initialContext;
|
| MainOrchestratorLocal orchestrator;
|
| public UIOutboxProcessorMDB() {
| super();
| }
|
| /**
| * Set the associated context. The container calls this method
| * after the instance creation. <br>
| *
| * The enterprise bean instance should store the reference to the
context
| * object in an instance variable. <br>
| *
| * This method is called with no transaction context.
| *
| * @param newContext A MessageDrivenContext interface for the instance.
| *
| * @throws EJBException Thrown by the method to indicate a failure
caused by a system-level error.
| *
| *
| *
| */
| public void setMessageDrivenContext(MessageDrivenContext newContext)
throws EJBException {
| context = newContext;
| }
|
| public void ejbRemove() throws EJBException {
| // TODO Auto-generated method stub
|
| }
|
| /**
| * Method that retreives a message from the message queue specified
| * Since container managed transaction in enabled if there is an
exception
| * between the retreiving of the message and the end of the process
specified
| * in the orchestrator SessionBean the transaction will be rolled back
with
| * no need for user specified commit() or rollback methods()
| * @param msg the message from the user interface outbox
| */
| public void onMessage(Message msg) {
| try {
| System.out.println("UIOMDB: Received Message from
queue");
| TextMessage tm = (TextMessage) msg;
| String theMessage = tm.getText();
| orchestrator =
MainOrchestratorUtil.getLocalHome().create();
| System.out.println("UIOMDB: Createnew StatelessSB
Orchestrator");
| orchestrator.processMessageFromUIOutbox(theMessage);
| System.out.println("UIOMDB: Orchestrator returned from
process message");
| } catch (CreateException e) {
| e.printStackTrace();
| } catch (NamingException e) {
| e.printStackTrace();
| } catch (JMSException e) {
| e.printStackTrace();
| } catch (EJBException e) {
| e.printStackTrace();
| }
| }
|
| /**
| * An ejbCreate method as required by the EJB specification.
| *
| * The container calls the instance?s <code>ejbCreate</code> method
| * immediately after instantiation.
| *
| * @ejb.create-method
| */
| public void ejbCreate() {
|
| }
|
| }
|
The Session Bean looks like this:
package is.scholar.orchestrator.ejb;
|
| import java.rmi.RemoteException;
|
| import javax.ejb.CreateException;
| import javax.ejb.EJBException;
| import javax.ejb.SessionBean;
| import javax.ejb.SessionContext;
| import javax.jms.JMSException;
| import javax.jms.Queue;
| import javax.jms.QueueConnection;
| import javax.jms.QueueConnectionFactory;
| import javax.jms.QueueSender;
| import javax.jms.QueueSession;
| import javax.jms.Session;
| import javax.jms.TextMessage;
| import javax.naming.InitialContext;
| import javax.naming.NamingException;
|
| /**
| * XDoclet-based session bean. The class must be declared
| * public according to the EJB specification.
| *
| * To generate the EJB related files to this EJB:
| * - Add Standard EJB module to XDoclet project properties
| * - Customize XDoclet configuration for your appserver
| * - Run XDoclet
| *
| * Below are the xdoclet-related tags needed for this EJB.
| *
| * @ejb.bean name="MainOrchestrator"
| * jndi-name="ejb/MainOrchestrator"
| * type="Stateless"
| * view-type="local"
| *
| */
| public class MainOrchestratorBean implements SessionBean {
|
| private static final long serialVersionUID = -5234607840877395891L;
| /** The session context */
| private SessionContext context;
| private QueueConnectionFactory connectionFactory;
|
| public MainOrchestratorBean() {
| super();
| // TODO Auto-generated constructor stub
| }
|
| /**
| * Set the associated session context. The container calls this method
| * after the instance creation.
| *
| * The enterprise bean instance should store the reference to the
context
| * object in an instance variable.
| *
| * This method is called with no transaction context.
| *
| * @throws EJBException Thrown if method fails due to system-level
error.
| */
| public void setSessionContext(SessionContext newContext) throws
EJBException {
| context = newContext;
| }
|
| public void ejbRemove() throws EJBException, RemoteException {
| // TODO Auto-generated method stub
|
| }
|
| public void ejbActivate() throws EJBException, RemoteException {
| // TODO Auto-generated method stub
|
| }
|
| public void ejbPassivate() throws EJBException, RemoteException {
| // TODO Auto-generated method stub
|
| }
|
| /**
| * An ejbCreate method as required by the EJB specification.
| *
| * The container calls the instance?s <code>ejbCreate</code> method
whose
| * signature matches the signature of the <code>create</code> method
invoked
| * by the client. The input parameters sent from the client are passed
to
| * the <code>ejbCreate</code> method. Each session bean class must have
at
| * least one <code>ejbCreate</code> method. The number and signatures
| * of a session bean?s <code>create</code> methods are specific to each
| * session bean class.
| *
| * @throws CreateException Thrown if method fails due to system-level
error.
| *
| * @ejb.create-method
| *
| */
| public void ejbCreate() throws CreateException {
| //Set up all the queues
| try {
| connectionFactory = (QueueConnectionFactory) new
InitialContext().lookup("JQCF");
| } catch (NamingException ex) {
| ex.printStackTrace();
| }
|
| }
|
| /**
| *
| * @ejb.interface-method view-type = "local"
| *
| * @throws EJBException
| * Thrown if method fails due to system-level error.
| * @throws NamingException
| * @throws JMSException
| */
| public void processMessageFromUIOutbox(String aMessage) throws
EJBException, NamingException, JMSException {
| System.out.println("ORCH: received call to processMessageUIO");
| Queue queue = (Queue)new
InitialContext().lookup("queue/ScholarXMLInboxQueue");
| QueueConnection connection =
connectionFactory.createQueueConnection();
| QueueSession session =
(QueueSession)connection.createQueueSession(true,Session.AUTO_ACKNOWLEDGE);
| QueueSender sender = (QueueSender)session.createSender(queue);
| TextMessage tm = session.createTextMessage();
| tm.setText(aMessage);
| System.out.println("ORCH: About to put the message in
ScholarXMLInboxQueue");
| sender.send(tm);
| System.out.println("ORCH: Message sent returning...");
| return;
| }
|
| }
|
the ejb-jar.xml looks like this:
| ...
|
| <!-- Session Beans -->
| <session >
| <description><![CDATA[XDoclet-based session bean.]]></description>
|
| <ejb-name>MainOrchestrator</ejb-name>
|
|
<local-home>is.scholar.orchestrator.interfaces.MainOrchestratorLocalHome</local-home>
|
<local>is.scholar.orchestrator.interfaces.MainOrchestratorLocal</local>
|
<ejb-class>is.scholar.orchestrator.ejb.MainOrchestratorSession</ejb-class>
| <session-type>Stateless</session-type>
| <transaction-type>Container</transaction-type>
|
| </session>
|
|
| .....
|
|
|
| <message-driven >
| <description><![CDATA[MDB that retreives transactionaly a message
from its outbox queue and sends it to the corresponding method en the
orchestrator]]></description>
| <display-name>UIOutboxProcessorMDB</display-name>
|
| <ejb-name>UIOutboxProcessorMDB</ejb-name>
|
|
<ejb-class>is.scholar.orchestrator.ejb.UIOutboxProcessorMDB</ejb-class>
|
| <transaction-type>Container</transaction-type>
| <acknowledge-mode>Auto-acknowledge</acknowledge-mode>
| <message-driven-destination>
| <destination-type>javax.jms.Queue</destination-type>
| <subscription-durability>Durable</subscription-durability>
| </message-driven-destination>
|
| <ejb-local-ref >
| <ejb-ref-name>MainOrchestrator</ejb-ref-name>
| <ejb-ref-type>Session</ejb-ref-type>
|
<local-home>is.scholar.orchestrator.interfaces.MainOrchestratorLocalHome</local-home>
|
<local>is.scholar.orchestrator.interfaces.MainOrchestratorLocal</local>
| <ejb-link>MainOrchestrator</ejb-link>
| </ejb-local-ref>
|
and finally the jboss.xml looks like this:
| ...
| <session>
| <ejb-name>MainOrchestrator</ejb-name>
| <local-jndi-name>MainOrchestratorLocal</local-jndi-name>
|
| <method-attributes>
| </method-attributes>
| </session>
|
|
| ...
|
|
| </message-driven>
| <message-driven>
| <ejb-name>UIOutboxProcessorMDB</ejb-name>
| <destination-jndi-name>queue/UIOutboxQueue</destination-jndi-name>
|
| </message-driven>
|
I can't seem to get this right. Any help would be very much appreciated.
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