50 Best Features of Java EE 7 @ OpenSlava

Reference: http://www.openslava.sk/2014/

The Java EE 7 platform has four new components (WebSocket, JSON-P, batch, and concurrency), three that are significantly updated (JAX-RS, JMS, and EL), and several others that bring significant changes to the platform. As you can imagine, a lot of new functionality has been introduced in the platform. In this fast-paced session, you will learn about 50 best features introduced in the Java EE 7 platform.

Transcript

1. 1 50 best features of Java EE 7 in 50 minutes Markus Eisele, @myfear Developer Advocate September, 2014
2. 2 50 best features of Java EE 7 in 50 minutes Markus Eisele, @myfear Developer Advocate September, 2014 40
3. 3 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0 Servlet 3.1 JSF 2.2 EL 3.0 JSP JSTL Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5
4. 4 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0 Servlet 3.1 JSF 2.2 EL 3.0 JSP JSTL Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 CDI 1.1 (JSR 346)
5. 5 #01: CDI: Default enabling Finer scanning control Possible values: all, annotated, none all behaves like in Java EE 6 (default if not set) <beans ... version="1.1" bean-discovery-mode="all"> <alternatives> <class>org.agoncal.book.MockGenerator</class> </alternatives> </beans>
6. 6 #02: CDI: @Vetoed Veto the processing of the class or package @Vetoed public class NonProcessedBean { ... } package-info.java @Vetoed package com.non.processed.package;
7. 7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0 Servlet 3.1 JSF 2.2 EL 3.0 JSP JSTL Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 Bean Validation 1.1 (JSR 349)
8. 8 #03: Bean Validation: Method validation Pre/post conditions on method and constructors public class CardValidator { public CardValidator(@NotNull Algorithm algorithm) { this.algorithm = algorithm; } @AssertTrue public Boolean validate(@NotNull CreditCard creditCard) { return algorithm.validate(creditCard.getNumber()); } }
9. 9 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0 Servlet 3.1 JSF 2.2 EL 3.0 JSP JSTL Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 Interceptors 1.2 (JSR 318)
10. 10 #04: Interceptors: AroundConstruct Interceptor associated with a constructor public class LoggingInterceptor { @AroundConstruct private void init(InvocationContext ic) throws Exception{ logger.fine("Entering constructor"); ic.proceed(); logger.fine("Exiting constructor"); } @AroundInvoke public Object logMethod(InvocationContext ic) ... { // ... } }
11. 11 #05: Interceptors: @Priority Prioritizing interceptor bindings PLATFORM_BEFORE (0), LIBRARY_BEFORE (1000), APPLICATION (2000), LIBRARY_AFTER (3000), PLATFORM_AFTER (4000) @Interceptor @Loggable @Priority(Interceptor.Priority.LIBRARY_BEFORE+10) public class LoggingInterceptor { @AroundInvoke ... }
12. 12 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0 Servlet 3.1 JSF 2.2 EL 3.0 JSP JSTL Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 Concurrency utilities 1.0 (JSR 236)
13. 13 #06: Concurrency: ManagedExecutor User threads in Java EE applications Support simple and advance concurrency design patterns Extend Concurrency Utilities API from Java SE (JSR 166y) java.util.concurrent package
14. 14 #06: Concurrency: ManagedExecutor @Resource ManagedExecutorService executor; ManagedExecutorService executor = (ManagedExecutorService) ctx .lookup("java:comp/DefaultManagedExecutorService"); Default ManagedExectuor
15. 15 #06: Concurrency: ManagedExecutor <web-app … version="3.1"> <resource-env-ref> <resource-env-ref-name> concurrent/myExecutor </resource-env-ref-name> <resource-env-ref-type> javax.enterprise.concurrent.ManagedExecutorService </resource-env-ref-type> </resource-env-ref> </web-app> Specify in web.xml
16. 16 #07: Concurrency: ManagedScheduledExecutor Managed version of ScheduledExecutorService Submit delayed or periodic tasks @Resource ManagedScheduledExecutorService executor;
17. 17 #07: Concurrency: ManagedScheduledExecutor InitialContext ctx = new InitialContext(); ManagedScheduledExecutorService executor = (ManagedScheduledExecutorService)ctx.lookup( "java:comp/DefaultManagedScheduledExecutorService "); Can be defined in web.xml as well Access using JNDI
18. 18 #07: Concurrency: ManagedScheduledExecutor executor.schedule(new MyCallableTask(), 5, TimeUnit.SECONDS); executor.scheduleAtFixedRate(new MyRunnableTask(), 2, 3, TimeUnit.SECONDS); executor.scheduleWithFixedDelay(new MyRunnableTask(), 2, 3, TimeUnit.SECONDS);
19. 19 #08: Concurrency: ManagedThreadFactory Extends ThreadFactory @Resource(name = "DefaultManagedThreadFactory") ManagedThreadFactory factory; ManagedThreadFactory factory = (ManagedThreadFactory) ctx.lookup("java:comp/DefaultManagedThreadFactory ");
20. 20 #08: Concurrency: ManagedThreadFactory Thread thread = factory.newThread(new MyTask()); ((ManageableThread)thread).isShutdown();
21. 21 #09: Concurrency: DynamicProxy Create dynamic proxy objects, adds contextual information available for applications running in Java EE environment Classloading, JNDI, Security, …
22. 22 #09: Concurrency: DynamicProxy @Resource ContextService service; Runnable proxy = service.createContextualProxy(new MyRunnable(), Runnable.class); Future f = executor.submit(proxy);
23. 23 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0 Servlet 3.1 JSF 2.2 EL 3.0 JSP JSTL Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 JPA 2.1 (JSR 338)
24. 24 #10: JPA: Schema Generation Standardized database schema generation <persistence ... version="2.1"> <persistence-unit ...> <properties> <property name="javax.persistence.schema-generation.scripts.action" value="drop-and-create"/> <property name="javax.persistence.schema-generation.scripts.create-target" value="create.sql"/> <property name="javax.persistence.sql-load-script-source" value="insert.sql"/> </properties> </persistence-unit>
25. 25 #11: JPA: @Index Defines additional indexes in schema generation @Entity @Table(indexes = { @Index(columnList = "ISBN"), @Index(columnList = "NBOFPAGE") }) public class Book { @Id @GeneratedValue private Long id; private String isbn; private Integer nbOfPage; ... }
26. 26 #12: JPA: Unsynchronized Persistence Context Persistence context is not enlisted in any tx unless explicitly joined @PersistenceContext(synchronization = SynchronizationType.UNSYNCHRONIZED) private EntityManager em; ... em.persist(book); ... em.joinTransaction();
27. 27 #13: JPA: Stored Procedure Calling a stored procedure @Entity @NamedStoredProcedureQuery(name = "archiveOldBooks", procedureName = "sp_archive_books", parameters = { @StoredProcedureParameter(name = ”date", mode = IN, type = Date.class), @StoredProcedureParameter(name = "warehouse", mode = IN, type = String.class) }) public class Book {...}
28. 28 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0 Servlet 3.1 JSF 2.2 EL 3.0 JSP JSTL Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 JTA 1.2 (JSR 907)
29. 29 #14: JTA: @Transactional Transaction management on Managed Beans as CDI interceptor binding @Path("book") @Transactional(value = Transactional.TxType.REQUIRED, rollbackOn = {SQLException.class, JMSException.class}, dontRollbackOn = SQLWarning.class) public class BookRestService { @PersistenceContext private EntityManager em; @POST @Consumes(MediaType.APPLICATION_XML) public Response createBook(Book book) {...} }
30. 30 #15: JTA: @TransactionScoped CDI scope whose lifecycle is scoped to the currently active JTA transaction @TransactionScoped public class BookBean {...} @WebServlet public class TxServlet extends HttpServlet { @Inject UserTransaction tx; @Inject BookBean b1; @Inject BookBean b2; protected void processRequest(...) { tx.begin(); s_out.println(b1.getReference()); s_out.println(b2.getReference()); tx.commit(); } }
31. 31 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0 Servlet 3.1 JSF 2.2 EL 3.0 JSP JSTL Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 EJB 3.2 (JSR 345)
32. 32 #16: EJB: Disable passivation of stateful In some cases increases performance, scalability and robustness @Stateful(passivationCapable = false) public class ShoppingCart { ... }
33. 33 #17: EJB-Lite: Async + Non-persistent timer Extended the EJB Lite to include local asynchronous invocations and non-persistent EJB Timer Service @Stateless public class OrderEJB { @Asynchronous public void sendEmail (Order order) { // Very Long task } @Schedule(hour="2", persistent=false) public void createDailyReport() { // ... } }
34. 34 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0 Servlet 3.1 JSF 2.2 EL 3.0 JSP JSTL Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 JMS 2.0 (JSR 343)
35. 35 #18: JMS: JMSContext API New simplified API to produce and consume messages JMSContext ctx = connectionFactory.createContext() ctx.createProducer().send(queue, "Text message sent"); ctx.createConsumer(queue).receiveBody(String.class); ctx.createProducer() .setPriority(2) .setTimeToLive(1000) .setDeliveryMode(DeliveryMode.NON_PERSISTENT) .send(queue, message);
36. 36 #19: JMS: Autocloseable Several JMS interfaces implement Autocloseable try (JMSContext ctx = connectionFactory.createContext()) { ctx.createProducer().send(queue, "Text message sent"); } ... try (JMSContext ctx = connectionFactory.createContext()) { while (true) { String s = ctx.createConsumer(queue).receiveBody(String.class); } }
37. 37 #20: JMS: JMSConnectionFactoryDefinition A JMS ConnectionFactory can be defined using an annotation on a container-managed class @Stateless @JMSConnectionFactoryDefinition( name = "java:app/jms/MyConnectionFactory", interfaceName = "javax.jms.TopicConnectionFactory") public class ExpensiveOrderEJB {...}
38. 38 #21: JMS: JMSDestinationDefinition A JMS queue or topic can be defined using an annotation @Stateless @JMSConnectionFactoryDefinition( name = "java:app/jms/MyConnectionFactory", interfaceName = "javax.jms.TopicConnectionFactory") @JMSDestinationDefinition( name = "java:app/jms/MyTopic", interfaceName = "javax.jms.Topic") public class ExpensiveOrderEJB {...}
39. 39 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0 Servlet 3.1 JSF 2.2 EL 3.0 JSP JSTL Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 Servlet 3.1 (JSR 340)
40. 40 #22: Servlet: Non-blocking I/O public class TestServlet extends HttpServlet protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { ServletInputStream input = request.getInputStream(); byte[] b = new byte[1024]; int len = -1; while ((len = input.read(b)) != -1) { . . . } } }
41. 41 #22: Servlet: Non-blocking I/O ServletInputStream public void setReadListener(ReadListener listener); public boolean isFinished(); public boolean isReady(); ServletOutputStream public setWriteListener(WriteListener listener); public boolean canWrite(); New methods to existing interfaces
42. 42 #22: Servlet: Non-blocking I/O public interface ReadListener extends EventListener { public void onDataAvailable(); pubic void onAllDataRead(); public void onError(); } public interface WriteListener extends EventListener { public void onWritePossible(); public void onError(); } New interfaces
43. 43 #22: Servlet: Non-blocking I/O AsyncContext context = request.startAsync(); ServletInputStream input = request.getInputStream(); input.setReadListener( new MyReadListener(input, context)); Only for Asynchronous Servlets
44. 44 #23: Servlet: Protocol Upgrade <T extends HttpUpgradeHandler> T HttpServletRequest.upgrade(Class<T> class) throws IOException; HttpUpgradeHandler init(WebConnection wc); destroy();
45. 45 #23: Servlet: Protocol Upgrade public interface WebConnection { ServletInputStream getInputStream(); ServletOutputStream getOutputStream(); }
46. 46 #24: Servlet: Improved Security <web-app . . . version="3.1"> <web-resource-collection> <url-pattern>/account/*</url-pattern> <http-method>GET</http-method> </web-resource-collection> <auth-contraint> . . . </auth-contraint> </web-app> Deny an HTTP method request for an uncovered HTTP method
47. 47 #24: Servlet: Improved Security <web-app . . . version="3.1"> <deny-uncovered-http-methods/> <web-resource-collection> <url-pattern>/account/*</url-pattern> <http-method>GET</http-method> </web-resource-collection> <auth-contraint> . . . </auth-contraint> </web-app> Deny an HTTP method request for an uncovered HTTP method
48. 48 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0 Servlet 3.1 JSF 2.2 EL 3.0 JSP JSTL Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 Web Socket 1.0 (JSR 356)
49. 49 #25: WebSocket: Annotated server endpoint Enables full-duplex bi-directional communication over single TCP connection @javax.websocket.server.ServerEndpoint("/chat") public class ChatServer { @OnMessage public String chat(String name, Session session) { for (Session peer : client.getOpenSessions()) { peer.getBasicRemote().sendObject(message); } } }
50. 50 #26: WebSocket: Lifecycle callbacks @javax.websocket.OnOpen public void open(Session s) { . . . } @javax.websocket.OnClose public void close(CloseReason c) { . . . } @javax.websocket.OnError public void error(Throwable t) { . . . }
51. 51 #27: WebSocket: Annotated client endpoint @javax.websocket.ClientEndpoint public class MyClient { @javax.websocket.OnOpen public void open(Session session) { … } // Lifecycle callbacks }
52. 52 #27: WebSocket: Annotated client endpoint ContainerProvider .getWebSocketContainer() .connectToServer( MyClient.class, URI.create("ws://. . ."));
53. 53 #28: WebSocket: Programmatic endpoints public class ChatServer extends Endpoint { @Override public void onOpen(Session s, EndpointConfig ec) { s.addMessageHandler(new MessageHandler.Whole<String>() { public void onMessage(String text) { . . . } } } @Override public void onClose(Session s, CloseReason cr) { . . . } //. . . }
54. 54 #28: WebSocket: Programmatic endpoints public class MyApplicationConfig implements ServerApplicationConfig { public Set<ServerEndpointConfig> getEndpointConfigs(…) { ServerEndpointConfig.Builder .create(MyEndpoint.class, "/websocket”) .configurator(new MyConfig()) .build() } }
55. 55 #28: WebSocket: Programmatic endpoints public class MyConfig extends ServerEndpointConfig.Configurator { public <T> T getEndpointInstance(. . .) { . . . } public void modifyHandshake(. . .) { . . . } . . . }
56. 56 #29: WebSocket: Encoder and Decoder @javax.websocket.server.ServerEndpoint( value="/chat", decoders="MyDecoder.class", encoders="MyEncoder.class") public class ChatServer { @OnMessage public String chat(ChatMessage name, Session session) { . . . } }
57. 57 #29: WebSocket: Encoder and Decoder public class MyDecoder implements Decoder.Text<ChatMessage> { public ChatMessage decode(String s) { // . . . } public boolean willDecode(String string) { // . . . } //. . . }
58. 58 #29: WebSocket: Encoder and Decoder public class MyEncoder implements Encoder.Text<ChatMessage> { public String encode(ChatMessage chatMessage) { // . . . } // . . . }
59. 59 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0 Servlet 3.1 JSF 2.2 EL 3.0 JSP JSTL Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 Expression Language 3.0 (JSR 341)
60. 60 #30: Expression Langauge: ELProcessor Use EL in a stand-alone environment Evaluate EL expressions Get/set bean properties Defining a static method as an EL function Defining an object instance as an EL name ELProcessor elp = new ELProcessor(); elp.defineBean("employee", new Employee("Charlie Brown")); String name = elp.eval("employee.name");
61. 61 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0 Servlet 3.1 JSF 2.2 EL 3.0 JSP JSTL Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 JSF 2.2 (JSR 344)
62. 62 #31: JSF: Faces Flow ./src/main/webapp/flow1 /flow1.xhtml /flow1a.xhtml /flow1b.xhtml ./src/main/webapp/flow2 /flow2-flow.xml /flow2.xhtml /flow2a.xhtml /flow2b.xhtml /index.xhtml Package reusable flows in JAR
63. 63 #31: JSF: Faces Flow @Named @FlowScoped("flow1") public class Flow1Bean implements Serializable { } @Produces @FlowDefinition public Flow defineFlow(@FlowBuilderParameter FlowBuilder fb) { String flowId = "flow1"; //. . . return fb.getFlow(); } Package reusable flows in JAR
64. 64 #31: JSF: Faces Flow Package reusable flows in JAR #{flowScope}: Local flow storage #{facesContext.application.flowHandler.currentFlow} : Returns true if within a flow
65. 65 #32: JSF: Resource Library Contract index-blue.xhtml index-red.xhtml WEB-INF/lib/contracts-library-1.0-SNAPSHOT.jar /META-INF/contracts/blue /style.css /javax.faces.contract.xml /template.xhtml /META-INF/contracts/red /style.css /javax.faces.contract.xml /template.xhtml Apply templates in a reusable and interchangeable manner
66. 66 #32: JSF: Resource Library Contract <f:view contracts=”red”> <ui:composition template="/template.xhtml"> . . . </ui:composition> </f:view> Apply templates in a reusable and interchangeable manner
67. 67 #33: JSF: Pass-through Attributes <h:inputText type="email" value="#{user.email}"/> <input type="text" name="j_idt6:j_idt10"/> HTML5-Friendly Markup <h:inputText p:type="email" value="#{user.email}"/> <input type="email" name="j_idt6:j_idt10"/>
68. 68 #34: JSF: File Upload Component <h:form enctype="multipart/form-data"> <h:inputFile value="#{fileUploadBean.file}"/><br/> <h:commandButton value="Upload"/><p/> </h:form> @Named @RequestScoped public class FileUploadBean { private Part file; //getter and setter }
69. 69 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0 Servlet 3.1 JSF 2.2 EL 3.0 JSP JSTL Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 JAX-RS 2.0 (JSR 339)
70. 70 #35: JAX-RS: Client API New API to consume rest services Client client = ClientBuilder.newClient(); WebTarget target = client.target("http://www.foo.com/book"); Invocation invocation = target.request(TEXT_PLAIN).buildGet(); Response response = invocation.invoke(); Response response = ClientBuilder.newClient() .target("http://www.foo.com/book") .request(MediaType.TEXT_PLAIN) .get(); String body = ClientBuilder.newClient() .target("http://www.foo.com/book") .request() .get(String.class);
71. 71 #36: JAX-RS: Async Client The client API also supports asynchronous invocation Future<String> future = ClientBuilder.newClient() .target("http://www.foo.com/book") .request() .async() .get(String.class); try { String body = future.get(1, TimeUnit.MINUTES); } catch (InterruptedException | ExecutionException e) {...}
72. 72 #37: JAX-RS: Async Server Asynchronous request processing on the server @Path("/async") public class AsyncResource { @GET public void asyncGet(@Suspended AsyncResponse asyncResp) { new Thread(new Runnable() { public void run() { String result = veryExpensiveOperation(); asyncResp.resume(result); } }).start(); }}
73. 73 #38: JAX-RS: Message Filter Used to process incoming and outgoing request or response headers Filters on client side ClientRequestFilter ClientResponseFilter Filters on server side ContainerRequestFilter ContainerResponseFilter
74. 74 #38: JAX-RS: Message Filter Used to process incoming and outgoing request or response headers public class LogginFilter implements ClientRequestFilter { public void filter(ClientRequestContext ctx) throws IOException { System.out.println(ctx.getMethod()); System.out.println(ctx.getUri()); } }
75. 75 #39: JAX-RS: Entity Interceptors Marshalling and unmarshalling HTTP message bodies Intercepts inbound entity streams (reads from the “wire”) ReaderInterceptor Intercepts outbound entity streams (writes to the “wire”) WriterInterceptor
76. 76 #39: JAX-RS: Entity Interceptors Marshalling and unmarshalling HTTP message bodies public class GZipInterceptor implements WriterInterceptor { public void aroundWriteTo(WriterInterceptorContext ctx){ OutputStream os = ctx.getOutputStream(); ctx.setOutputStream(new GZIPOutputStream(os)); ctx.proceed(); } }
77. 77 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0 Servlet 3.1 JSF 2.2 EL 3.0 JSP JSTL Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 JSON-P 1.0 (JSR 353)
78. 78 #40: JSON-P: JSON Builder Creates an object model (or an array) in memory by adding elements JsonObject value = Json.createObjectBuilder() .add("id", "1234") .add("date", "19/09/2012") .add("total_amount", "93.48") .add("customer", Json.createObjectBuilder() .add("first_name", "James") .add("last_name", "Rorrison") .add("email", "j.rorri@me.com") .add("phoneNumber", "+44 1234 1234") ) .build();
79. 79 #41: JSON-P: JsonParser Event-based parser that can read JSON data from a stream JsonParser parser = Json.createParser(new FileReader(“order.json")); while (parser.hasNext()) { JsonParser.Event event = parser.next(); if (event.equals(JsonParser.Event.KEY_NAME) && parser.getString().matches("email")) { parser.next(); email = parser.getString(); } }
80. 80 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0 Servlet 3.1 JSF 2.2 EL 3.0 JSP JSTL Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 Batch 1.0 (JSR 352)
81. 81 #42: Batch: Chunk-style Processing Item-oriented Processing Style (primary)
82. 82 #42: Batch: Chunk-style Processing <step id=”sendStatements”> <chunk item-count=“3”> <reader ref=”accountReader”/> <processor ref=”accountProcessor”/> <writer ref=”emailWriter”/> </step> …implements ItemReader { public Object readItem() { // read account using JPA } …implements ItemProcessor { public Object processItems(Object account) { // read Account, return Statement } …implements ItemWriter { public void writeItems(List accounts) { // use JavaMail to send email }
83. 83 #43: Batch: Batchlet-style Processing Task-oriented processing style <step id=”transferFile”> <batchlet ref=“MyFileTransfer” /> </step> …implements Batchlet { @Override public void process() { // Transfer file }
84. 84 #44: Batch: Job/Step/Chunk Listeners <job id="myJob" xmlns="http://xmlns.jcp.org/xml/ns/javaee" version="1.0”> <listeners> <listener ref="myJobListener"/> </listeners> <step id="myStep" > <listeners> <listener ref="myStepListener"/> <listener ref="myChunkListener"/> <listener ref="myItemReadListener"/> <listener ref="myItemProcessorListener"/> <listener ref="myItemWriteListener"/> </listeners> <chunk item-count="3”>. . .</chunk> </step> </job>
85. 85 #44: Batch: Job/Step/Chunk Listeners Interface Abstract Classes JobListener AbstractJobListener StepListener AbstractStepListener ChunkListener AbstractChunkListener ItemRead/Write/ProcessL istener AbstractItemRead/Write/Proce ssListener SkipRead/Write/ProcessL istener AbstractSkipRead/Write/Proce ssListener RetryRead/Write/Process Listener AbstractRetryRead/Write/Proc essListener
86. 86 #44: Batch: Job/Step/Chunk Listeners @Named public class MyJobListener extends AbstractJobListener { @Override public void beforeJob() throws Exception { . . . } @Override public void afterJob() throws Exception { . . . } }
87. 87 #45: Batch: Partition <step> <chunk item-count="3"> <reader ref="myItemReader"> <properties> <property name="start" value="#{partitionPlan['start']}"/> <property name="end" value="#{partitionPlan['end']}"/> </properties> </reader> . . . </chunk>
88. 88 #45: Batch: Partition <partition> <plan partitions="2"> <properties partition="0"> <property name="start" value="1"/> <property name="end" value="10"/> </properties> <properties partition="1"> <property name="start" value="11"/> <property name="end" value="20"/> </properties> </plan> </partition> </step>
89. 89 #46: Batch: Creating Workflows <flow id="flow1" next="step3"> <step id="step1" next="step2"> . . . </step> <step id="step2"> . . . </step> </flow> <step id="step3"> . . . </step> Flow: Elements that execute together as a unit
90. 90 #46: Batch: Creating Workflows <split id="split1" next=" . . . "> <flow id="flow1”> <step id="step1”> . . . </step> </flow> <flow id="flow2”> <step id="step2”> . . . </step> </flow> </split> Split: Concurrent execution of flows
91. 91 #46: Batch: Creating Workflows <step id="step1" next="decider1">. . .</step> <decision id="decider1" ref="myDecider"> <next on="DATA_LOADED" to="step2"/> <end on="NOT_LOADED"/> </decision> <step id="step2">. . .</step> Decision: Customized way of sequencing between steps, flows, splits @Named public class MyDecider implements Decider { @Override public String decide(StepExecution[] ses) throws Exception { . . . return "DATA_LOADED"; // or "NOT_LOADED" } }
92. 92 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0 Servlet 3.1 JSF 2.2 EL 3.0 JSP JSTL Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 JavaMail 1.5 (JSR 919)
93. 93 #47: JavaMail @MailSessionDefinition(name = "java:comp/myMailSession", properties = { "mail.smtp.host=smtp.gmail.com", "mail.smtp.ssl.enable=true", "mail.smtp.auth=true", "mail.transport.protocol=smtp", "mail.debug=true" }) @Resource(lookup = "java:comp/myMailSession") Session session;
94. 94 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0 Servlet 3.1 JSF 2.2 EL 3.0 JSP JSTL Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 JCA 1.7 (JSR 322)
95. 95 #48: Java Connector Architecture @ConnectionDefinition( connection="MyConnection.class", connectionImpl="MyConnectionImpl.class", connectionFactory="MyConnectionFactory.class", connectionFactoryImpl="MyConnectionFactoryImpl.class" ) @AdministeredObjectDefinition( className="MyQueueImpl.class", name="java:comp/MyQueue", resourceAdapter="myAdapter", )
96. 96 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0 Servlet 3.1 JSF 2.2 EL 3.0 JSP JSTL Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 Java EE 7 (JSR 342)
97. 97 #49: Default Resources JNDI name: java:comp/DefaultDataSource Default Data Source @Resource(lookup="java:comp/DefaultDataSource") DataSource myDS; @Resource DataSource myDS;
98. 98 #49: Default Resources JNDI name: java:comp/DefaultJMSConnectionFactory @Resource(lookup="java:comp/DefaultJMSConnectionFactory") ConnectionFactory myCF; @Resource ConnectionFactory myCF; Default JMS Connection Factory
99. 99 #49: Default Resources JNDI names java:comp/DefaultManagedExecutorService java:comp/DefaultManagedScheduledExecutorS ervice java:comp/DefaultManagedThreadFactory java:comp/DefaultContextService Default Concurrency Utilities Objects
100. 100 #50: Buy the books!
101. 101 References Java EE Samples Project: github.com/javaee-samples/javaee7-samples Ticket-Monster Examples Applications (EE 6!): https://github.com/jboss-developer/ticket- monster/tree/2.6.0.Final-with-tutorials