Aggiunto l'esempio del capitolo su Java Server Faces

jsfdemo/src/main/java/it/plague/jeedemo/BookEJB.java

@@ -0,0 +1,35 @@
+package it.plague.jeedemo;
+
+import java.util.List;
+import javax.annotation.sql.DataSourceDefinition;
+import javax.ejb.Stateless;
+import javax.inject.Inject;
+import javax.inject.Named;
+import javax.persistence.EntityManager;
+
+@Named
+@Stateless
+@DataSourceDefinition(
+    name = "java:global/jdbc/lab11DS",
+    className = "org.apache.derby.jdbc.EmbeddedDriver",
+    url = "jdbc:derby:memory:lab11DB;create=true;user=app;password=app"
+)
+public class BookEJB {
+
+  @Inject
+  private EntityManager em;
+
+  public Book createBook(Book book) {
+    em.persist(book);
+    return book;
+  }
+
+  public List<Book> findAllBooks() {
+    return em.createNamedQuery(Book.FIND_ALL, Book.class).getResultList();
+  }
+
+  public Book findBookById(Long id) {
+    return em.find(Book.class, id);
+  }
+
+}