Beginning Java EE 6 with GlassFish 3, Second Edition

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CHAPTER 7 ■ SESSION BEANS AND THE TIMER SERVICEpublic void printOrder(Order order) {// Print order}}public Future sendOrderToWorkflow(Order order) {Integer status = 0;// processingstatus = 1;if (ctx.wasCancelCalled()) {return new AsyncResult(2);}// processingreturn new AsyncResult(status);}Notice in Listing 7-18 that the @Asynchronous annotation can also be applied at the class level. Thisdefines all methods as being asynchronous. When the client invokes the sendOrderToWorkflow() method,it needs to call Future.get() in order to retrieve the result value.Future status = orderEJB.sendOrderToWorkflow (order);Integer statusValue = status.get();Embeddable UsageSession beans are container-managed components, and that’s their advantage. The container deals withall sorts of services (transaction, life cycle, asynchrony, interceptors, etc.), which leaves you toconcentrate on business code. The downside is that you always need to execute your EJBs in a container,even if you just want to test them. To solve this problem, you end up having to tweak your business codeto be able to test it: adding remote interfaces when your EJB only needs local access, creating a remoteTestEJB façade that delegates the calls to your real EJBs, or using a vendor’s specific features—but oneway or another, you need to have a container running with your deployed EJBs.This problem has been solved in EJB 3.1 with the creation of an embeddable EJB container. EJB 3.1brings a standard API to execute EJBs in a Java SE environment. The embeddable API (packagejavax.ejb.embeddable) allows a client to instantiate an EJB container that runs within its own JVM. Theembeddable container provides a managed environment with support for the same basic services thatexist within a Java EE container: injection, transactions, life cycle, and so forth. Embeddable EJBcontainers only work with the EJB Lite subset API (no MDBs, no Entity Beans 2.x, etc.), meaning it hasthe same capabilities as an EJB Lite container (but not a full EJB container).Listing 7-19 shows a JUnit test class that uses the bootstrapping API to start the container (thejavax.ejb.embeddable.EJBContainer abstract class), look up an EJB, and invoke methods on it.228
CHAPTER 7 ■ SESSION BEANS AND THE TIMER SERVICEListing 7-19. A Test Class Using the Embeddable Containerpublic class ItemEJBTest {private static EJBContainer ec;private static Context ctx;@BeforeClasspublic static void initContainer() throws Exception {ec = EJBContainer.createEJBContainer();ctx = ec.getContext();}@AfterClasspublic static void closeContainer() throws Exception {if (ec != null)ec.close();}@Testpublic void shouldCreateABook() throws Exception {// Creates an instance of bookBook book = new Book();book.setTitle("The Hitchhiker's Guide to the Galaxy");book.setPrice(12.5F);book.setDescription("Science fiction comedy book");book.setIsbn("1-84023-742-2");book.setNbOfPage(354);book.setIllustrations(false);// Looks up for the EJBItemEJB bookEJB = (ItemEJB) ctx.lookup("java:global/classes/ItemEJB");// Persists the book to the databasebook = itemEJB.createBook(book);assertNotNull("ID should not be null", book.getId());}}// Retrieves all the books from the databaseList books = itemEJB.findBooks();assertNotNull(books);As you can see in the initContainer() method in Listing 7-19, EJBContainer contains a factorymethod (createEJBContainer()) for creating a container instance. By default, the embeddable containersearches the client’s classpath to find the set of EJBs for initialization. Once the container has been229
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The EXPERT’s VOIce ® in Java tm
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Beginning Java EE 6 Platform with G
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Contents at a Glance■Foreword ...
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■ CONTENTSSummary ...............
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■ CONTENTSBulk Update ...........
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■ CONTENTSStateful . ............
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■ CONTENTSScripting Elements ....
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■ CONTENTSMDB Model .............
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■ CONTENTSFrom the Web to Web Ser
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About the Author■ Antonio Goncalv
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AcknowledgmentsWriting a book about
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■ PREFACECONTENTSChapter 1 briefl
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C H A P T E R 1■ ■ ■Java EE 6
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CHAPTER 1 ■ JAVA EE 6 AT A GLANCE
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CHAPTER 2 ■ JAVA PERSISTENCEJPA S
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CHAPTER 2 ■ JAVA PERSISTENCEEclip
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CHAPTER 2 ■ JAVA PERSISTENCEusing
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CHAPTER 2 ■ JAVA PERSISTENCEFigur
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CHAPTER 2 ■ JAVA PERSISTENCE@Befo
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CHAPTER 2 ■ JAVA PERSISTENCERunni
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CHAPTER 3 ■ OBJECT-RELATIONAL MAP
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C H A P T E R 4■ ■ ■Managing
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CHAPTER 4 ■ MANAGING PERSISTENT O
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C H A P T E R 5■ ■ ■Callbacks
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CHAPTER 5 ■ CALLBACKS AND LISTENE
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CHAPTER 10 ■ JAVASERVER FACESUnde
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CHAPTER 10 ■ JAVASERVER FACESList
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CHAPTER 10 ■ JAVASERVER FACESpubl
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CHAPTER 10 ■ JAVASERVER FACESorg.
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C H A P T E R 11■ ■ ■Pages an
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CHAPTER 11 ■ PAGES AND COMPONENTS
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CHAPTER 12 ■ PROCESSING AND NAVIG
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CHAPTER 13 ■ SENDING MESSAGESFigu
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CHAPTER 13 ■ SENDING MESSAGESJava
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CHAPTER 13 ■ SENDING MESSAGES3.0.
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CHAPTER 14 ■ SOAP WEB SERVICESFig
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CHAPTER 14 ■ SOAP WEB SERVICESapp
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CHAPTER 15 ■ RESTFUL WEB SERVICES
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■ INDEXApache Maven. See Mavenapp
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Beginning Java EE 6 with GlassFish 3, Second Edition

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