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TP4 EJB : Utilisation de JMS et de Message Driven BeansDe $1Table des matièresFaisons marcher l'exemple du coursRepartez du TP2. Dans la liste des EJBs, ajoutez un Message Driven Bean. import javax.ejb.MessageDriven; import javax.jms.JMSException; import javax.jms.Message; import javax.jms.MessageListener; import javax.jms.ObjectMessage; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; /** * * @author lm */ @MessageDriven(mappedName = "jms/NewMessage", activationConfig = { @ActivationConfigProperty(propertyName = "acknowledgeMode", propertyValue = "Auto-acknowledge"), @ActivationConfigProperty(propertyName = "destinationType", propertyValue = "javax.jms.Topic"), @ActivationConfigProperty(propertyName = "subscriptionDurability", propertyValue = "Durable"), @ActivationConfigProperty(propertyName = "clientId", propertyValue = "NewMessageBean"), @ActivationConfigProperty(propertyName = "subscriptionName", propertyValue = "NewMessageBean") }) public class NewMessageBean implements MessageListener { @PersistenceContext private EntityManager em; public NewMessageBean() { } public void onMessage(Message msg) { if(msg instanceof TextMessage) { TextMessage tm = (TextMessage) msg; try { String text = tm.getText(); System.out.println("Received new message :" + text); } catch (JMSException e) { e.printStackTrace(); } } } public void persist(Object object) { em.persist(object); } }
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