esercizio e test usando jms e mdb

exercise2/MDBBook.java

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+package exercise2;
+
+import javax.ejb.MessageDriven;
+import javax.inject.Inject;
+import javax.jms.JMSException;
+import javax.jms.Message;
+import javax.jms.MessageListener;
+import java.util.Iterator;
+import java.util.List;
+import java.util.logging.Logger;
+
+/**
+ * Created by Giovanni on 31/05/2015.
+ */
+@MessageDriven(mappedName = "jms/javaee7/Topic")
+public class MDBBook implements MessageListener {
+
+    @Inject
+    Logger l;
+
+    @Inject
+    EJBBook e;
+
+    public void onMessage(Message message) {
+        try {
+            BookMessage m = message.getBody(BookMessage.class);
+            l.info("Messaggio: " + m.getIsbn() + " " + m.getPrice());
+
+            List<Book> lb = e.findbyisbn(m.getIsbn());
+            Iterator<Book>ib = lb.iterator();
+            if (ib.hasNext()){
+                Book b = ib.next();
+                b.setPrice(m.getPrice());
+                e.update_book(b);
+            }
+        } catch (JMSException e) {
+            e.printStackTrace();
+        }
+    }
+}