Which two statements are true JMS message-driven beans? (Choose two.)

Question

Options

• AThe developer can use JMS message selector declarations to restrict the message that the bean receives.
• BThe developer can associate the bean with a specific queue or topic using the resource-ref element of the
• CTo achieve concurrent processing of more than one message at a time, more than one bean class must be
• DThe developer can use the activationConfig element of the MessageDriven annotation to specify whether the

• A
  83% (43)
• B
  6% (3)
• C
  12% (6)

Explanation

A:Elements in the deployment descriptor The description of a MDB(message-driven beans)in the EJB 2.0 deployment descriptor contains the following specific elements: *the JMS acknowledgement mode: auto-acknowledge or dups-ok-acknowledge *an eventual JMS message selector: this is a JMS concept which allows the filtering of the messages sent to the *a message-driven-destination, which contains the destination type (Queue or Topic) and the The following example is a basic message-driven bean: @MessageDriven(activationConfig={ @ActivationConfigProperty(propertyName="destination", propertyValue="myDestination"), @ActivationConfigProperty(propertyName="destinationType", propertyValue="javax.jms.Queue") }) public class MsgBean implements javax.jms.MessageListener { public void onMessage(javax.jms.Message msg) { String receivedMsg = ((TextMessage) msg).getText(); System.out.println("Received message: " + receivedMsg); } Developing message-driven beans Message Driven Beans Tutorial

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