Aggiunto l'esempio capitolo su Enterprise JavaBean

ejbdemo/src/main/java/it/plague/jeedemo/Book.java

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+package it.plague.jeedemo;
+
+import java.io.Serializable;
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.NamedQuery;
+import javax.validation.constraints.NotNull;
+import javax.validation.constraints.Size;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Data
+@NoArgsConstructor
+@Builder
+@NamedQuery(name = "Book.findAll", query = "select b from Book b")
+public class Book implements Serializable {
+
+  @Id
+  @GeneratedValue
+  private Long id;
+  @NotNull
+  @Column(nullable = false)
+  private String title;
+  private Float price;
+  @Size(max = 2000)
+  @Column(length = 2000)
+  private String description;
+  private String isbn;
+  private Integer nbOfPage;
+  private Boolean illustrations;
+}

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

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+package it.plague.jeedemo;
+
+import java.util.List;
+import javax.ejb.LocalBean;
+import javax.ejb.Stateless;
+import javax.inject.Inject;
+import javax.persistence.EntityManager;
+import javax.persistence.TypedQuery;
+import javax.validation.constraints.NotNull;
+
+@Stateless
+@LocalBean
+public class BookEJB implements BookEJBRemote {
+
+  @Inject
+  private EntityManager em;
+
+  @Override
+  public List<Book> findBooks() {
+    TypedQuery<Book> query = em.createNamedQuery("Book.findAll", Book.class);
+    return query.getResultList();
+  }
+
+  @Override
+  public @NotNull Book createBook(@NotNull Book book) {
+    em.persist(book);
+    return book;
+  }
+
+  @Override
+  public @NotNull Book updateBook(@NotNull Book book) {
+    return em.merge(book);
+  }
+
+  @Override
+  public void deleteBook(@NotNull Book book) {
+    em.remove(em.merge(book));
+  }
+}

ejbdemo/src/main/java/it/plague/jeedemo/BookEJBRemote.java

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+package it.plague.jeedemo;
+
+import java.util.List;
+import javax.ejb.Remote;
+
+@Remote
+public interface BookEJBRemote {
+
+  List<Book> findBooks();
+
+  Book createBook(Book book);
+
+  void deleteBook(Book book);
+
+  Book updateBook(Book book);
+}

ejbdemo/src/main/java/it/plague/jeedemo/DatabasePopulator.java

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+package it.plague.jeedemo;
+
+import javax.annotation.PostConstruct;
+import javax.annotation.PreDestroy;
+import javax.annotation.sql.DataSourceDefinition;
+import javax.ejb.Singleton;
+import javax.ejb.Startup;
+import javax.inject.Inject;
+
+
+@Startup
+@Singleton
+@DataSourceDefinition(
+    className = "org.apache.derby.jdbc.EmbeddedDataSource",
+    name = "java:global/jdbc/ejbdemoDS",
+    user = "app",
+    password = "app",
+    databaseName = "ejbdemo",
+    properties = {"connectionAttributes=;create=true"})
+public class DatabasePopulator {
+
+  @Inject
+  private BookEJB bookEJB;
+
+  private Book h2g2;
+  private Book lord;
+
+  @PostConstruct
+  private void populateDB() {
+    h2g2 = Book.builder()
+        .title("Beginning Java EE 7")
+        .price(35f)
+        .description("Great book")
+        .isbn("1-8763-9125-7")
+        .nbOfPage(605)
+        .illustrations(true)
+        .build();
+    lord = Book.builder()
+        .title("The Lord of the Rings")
+        .price(50.4f)
+        .description("SciFi")
+        .isbn("1-84023-742-2")
+        .nbOfPage(1216)
+        .illustrations(true)
+        .build();
+
+    bookEJB.createBook(h2g2);
+    bookEJB.createBook(lord);
+  }
+
+  @PreDestroy
+  private void clearDB() {
+    bookEJB.deleteBook(h2g2);
+    bookEJB.deleteBook(lord);
+  }
+}

ejbdemo/src/main/java/it/plague/jeedemo/DatabaseProducer.java

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+package it.plague.jeedemo;
+
+import javax.enterprise.inject.Produces;
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+
+public class DatabaseProducer {
+
+  @Produces
+  @PersistenceContext(unitName = "ejbdemoPU")
+  private EntityManager em;
+}

ejbdemo/src/main/resources/META-INF/beans.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<beans
+  xmlns="http://xmlns.jcp.org/xml/ns/javaee"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee 
+                      http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd"
+  bean-discovery-mode="all">
+</beans>

ejbdemo/src/main/resources/META-INF/persistence.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<persistence version="2.1"
+  xmlns="http://xmlns.jcp.org/xml/ns/persistence"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
+
+  <persistence-unit name="ejbdemoPU" transaction-type="JTA">
+    <jta-data-source>java:global/jdbc/ejbdemoDS</jta-data-source>
+    <properties>
+      <property name="eclipselink.target-database" value="DERBY"/>
+      <property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
+      <property name="eclipselink.logging.level" value="ALL"/>
+    </properties>
+  </persistence-unit>
+
+</persistence>

ejbdemo/src/test/java/it/plague/jeedemo/BookEJBIT.java

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+package it.plague.jeedemo;
+
+import static org.junit.Assert.*;
+
+import java.io.File;
+import java.util.HashMap;
+import java.util.Map;
+import javax.ejb.embeddable.EJBContainer;
+import javax.naming.Context;
+import org.junit.Test;
+
+public class BookEJBIT {
+
+  @Test
+  public void shouldCreateABook() throws Exception {
+    Map<String, Object> properties = new HashMap<>();
+    properties.put(EJBContainer.MODULES, new File("target/classes"));
+    try (EJBContainer ec = EJBContainer.createEJBContainer(properties)) {
+      Context ctx = ec.getContext();
+
+      // Check JNDI dependencies (Datasource and EJBs)
+      assertNotNull(ctx.lookup("java:global/jdbc/ejbdemoDS"));
+      assertNotNull(ctx.lookup("java:global/classes/BookEJB!it.plague.jeedemo.BookEJBRemote"));
+      assertNotNull(ctx.lookup("java:global/classes/BookEJB!it.plague.jeedemo.BookEJB"));
+
+      // Looks up the EJB
+      BookEJB bookEJB = (BookEJB) ctx.lookup("java:global/classes/BookEJB!it.plague.jeedemo.BookEJB");
+
+      // Find all the books and makes sure there are two (inserted by the DBPopulator)
+      assertEquals(2, bookEJB.findBooks().size());
+
+      // Creates an instance of book;
+      Book book = Book.builder()
+          .title("H2G2")
+          .price(12.5f)
+          .description("Scifi book")
+          .isbn("1-24561-799-0")
+          .nbOfPage(354)
+          .illustrations(false)
+          .build();
+      book = bookEJB.createBook(book);
+      assertNotNull("ID should not be null", book.getId());
+
+      // Find all the books and makes sure is an extra one
+      assertEquals(3, bookEJB.findBooks().size());
+
+      // Removes the created book
+      bookEJB.deleteBook(book);
+
+      // Finds all the books and makes sure there is one less
+      assertEquals(2, bookEJB.findBooks().size());
+    }
+  }
+}