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50 features of Java EE 7 in 50 minutes at JavaZone 2014

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Arun Gupta
Arun Gupta

The document outlines 50 new features in Java EE 7 across various Java EE specifications like CDI, JPA, EJB, JMS and Servlet in 50 minutes. Some key features include default enabling of CDI, method validation in Bean Validation, managed executors for concurrency utilities, disabling passivation of stateful sessions in EJB, simplified JMS API with JMSContext and support for non-blocking I/O in Servlet.

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1 50 new features of Java EE 7 in 50 minutes Arun Gupta, @arungupta Director, Developer Advocacy Sep 9, 2014
2 #NN: <spec>: <feature>
3 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5
4 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 CDI 1.1 (JSR 346)
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 #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 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 Bean Validation 1.1 (JSR 349)
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 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 Interceptors 1.2 (JSR 318)
10 #04: Interceptors: AroundConstruct Interceptor associated with a constructor !public class LoggingInterceptor {! @AroundConstruct! p r i vlaotgeg evro.ifdi inne(i"t(EInntveorciantgi ocnoCnosnttreuxctt oirc")) ;{!! ilco.ggperor.cefeidn(e()";!Exiting constructor");! ! }! @pAurboluincd IOnbvjoekcet! logMethod(InvocationContext ic) ... {}! // ...! }!
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 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 Concurrency utilities 1.0 (JSR 236)
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 #06: Concurrency: ManagedExecutor Default ManagedExectuor @Resource ManagedExecutorService executor; ! ManagedExecutorService executor = (ManagedExecutorService) ctx.lookup("java:comp/DefaultManagedExecutorService");!
15 #06: Concurrency: ManagedExecutor Specify in web.xml <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>!
16 #07: Concurrency: ManagedScheduledExecutor Managed version of ScheduledExecutorService! Submit delayed or periodic tasks @Resource ManagedScheduledExecutorService executor;!
17 #07: Concurrency: ManagedScheduledExecutor Access using JNDI InitialContext ctx = new InitialContext(); ManagedScheduledExecutorService executor = (ManagedScheduledExecutorService)ctx.lookup( "java:comp/ DefaultManagedScheduledExecutorService"); ! Can be defined in web.xml as well
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 #08: Concurrency: ManagedThreadFactory Extends ThreadFactory @Resource(name = "DefaultManagedThreadFactory") ManagedThreadFactory factory; ManagedThreadFactory factory = (ManagedThreadFactory) ctx.lookup("java:comp/ DefaultManagedThreadFactory");
20 #08: Concurrency: ManagedThreadFactory Thread thread = factory.newThread(new MyTask()); ((ManageableThread)thread).isShutdown();
21 #09: Concurrency: DynamicProxy Create dynamic proxy objects, adds contextual information available for applications running in Java EE environment Classloading, JNDI, Security, …
22 #09: Concurrency: DynamicProxy @Resource ContextService service; Runnable proxy = service.createContextualProxy(new MyRunnable(), Runnable.class); Future f = executor.submit(proxy);!
23 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 JPA 2.1 (JSR 338)
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 #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 #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 #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 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 JTA 1.2 (JSR 907)
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 #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 BookBean b1;! @Inject BookBean b2;! @Transactional! protected void processRequest(...) {! s_out.println(b1.getReference());! s_out.println(b2.getReference());! }! }!
31 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 EJB 3.2 (JSR 345)
32 #16: EJB: Disable passivation of stateful In some cases increases performance, scalability and robustness @Stateful(passivationCapable = false)! public class ShoppingCart {! ...! }!
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 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 JMS 2.0 (JSR 343)
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 #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 #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 #21: JMS: JMSDestinationDefinition A JMS queue or topic can be defined using an annotation @Stateless! @JMSConnectionFactoryDefinition(! name = "java:app/jms/MyConnectionFactory",! "j a v a x . j imnst.eTrofpaicceCNoanmnee c=t ionFactory")! @JMSDestinationDefinition(! name = "java:app/jms/MyTopic",! interfaceName = "javax.jms.Topic")! public class ExpensiveOrderEJB {...}!
39 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 Servlet 3.1 (JSR 340)
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 #22: Servlet: Non-blocking I/O New methods to existing interfaces ServletInputStream! public void setReadListener(ReadListener listener);! public boolean isFinished();! public boolean isReady();! ServletOutputStream! public setWriteListener(WriteListener listener);! public boolean canWrite();!
42 #22: Servlet: Non-blocking I/O New interfaces 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(); }!
43 #22: Servlet: Non-blocking I/O Only for Asynchronous Servlets AsyncContext context = request.startAsync(); ServletInputStream input = request.getInputStream(); input.setReadListener( new MyReadListener(input, context)); !
44 #23: Servlet: Protocol Upgrade <T extends HttpUpgradeHandler> T HttpServletRequest.upgrade(Class<T> class) throws IOException; ! HttpUpgradeHandler! init(WebConnection wc);! destroy();!
45 #23: Servlet: Protocol Upgrade public interface WebConnection { ServletInputStream getInputStream(); ServletOutputStream getOutputStream(); }!
46 #24: Servlet: Improved Security Deny an HTTP method request for an uncovered HTTP method <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> ! !
47 #24: Servlet: Improved Security Deny an HTTP method request for an uncovered HTTP method <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> ! !
48 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 Web Socket 1.0 (JSR 356)
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 #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 #27: WebSocket: Annotated client endpoint @javax.websocket.ClientEndpoint public class MyClient { @javax.websocket.OnOpen public void open(Session session) { … } // Lifecycle callbacks }!
52 #27: WebSocket: Annotated client endpoint ContainerProvider .getWebSocketContainer() .connectToServer( MyClient.class, URI.create("ws://. . ."));!
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 #28: WebSocket: Programmatic endpoints public class MyApplicationConfig implements ServerApplicationConfig { public Set<ServerEndpointConfig> getEndpointConfigs(…) { ServerEndpointConfig.Builder .create(MyEndpoint.class, "/websocket”) .configurator(new MyConfig()) .build() } }!
55 #28: WebSocket: Programmatic endpoints public class MyConfig extends ServerEndpointConfig.Configurator { public <T> T getEndpointInstance(. . .) { . . . } public void modifyHandshake(. . .) { . . . } . . . }!
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 #29: WebSocket: Encoder and Decoder public class MyDecoder implements Decoder.Text<ChatMessage> { public ChatMessage decode(String s) { // . . . } public boolean willDecode(String string) { // . . . } //. . . } !
58 #29: WebSocket: Encoder and Decoder public class MyEncoder implements Encoder.Text<ChatMessage> { public String encode(ChatMessage chatMessage) { // . . . } ! // . . . }!
59 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 Expression Language 3.0 (JSR 341)
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 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 JSF 2.2 (JSR 344)
62 #31: JSF: Faces Flow Package reusable flows in JAR ./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!
63 #31: JSF: Faces Flow Package reusable flows in JAR @Named @FlowScoped("flow1") public class Flow1Bean implements Serializable { }! ! @Produces @FlowDefinition public Flow defineFlow(@FlowBuilderParameter FlowBuilder fb) { String flowId = "flow1"; //. . . return fb.getFlow(); }!
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 #32: JSF: Resource Library Contract Apply templates in a reusable and interchangeable manner 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!
66 #32: JSF: Resource Library Contract Apply templates in a reusable and interchangeable manner <f:view contracts=”red”> <ui:composition template="/template.xhtml"> . . . </ui:composition> </f:view> !
67 #33: JSF: Pass-through Attributes HTML5-Friendly Markup <h:inputText type="email" value="#{user.email}"/> ! <input type="text" name="j_idt6:j_idt10"/>! <h:inputText p:type="email" value="#{user.email}"/> <input type="email" name="j_idt6:j_idt10"/>! !
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 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 JAX-RS 2.0 (JSR 339)
70 #35: JAX-RS: Client API New API to consume rest services Client client = ClientBuilder.newClient();! WbeoboTk"a)r;g!et target = client.target("http://www.foo.com/ Itanrvgoceat.tireonq uiensvt(oTcEaXtTi_oPnL A=I N).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 #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);! {} ..c.at}!ch (InterruptedException | ExecutionException e)
72 #37: JAX-RS: Async Server Asynchronous request processing on the server @Path("/async")! public class AsyncResource {! ! @GET! a spynubcRleics p)v o{i!d asyncGet(@Suspended AsyncResponse ! new Thread(new Runnable() {! ! public void run() {! String result = veryExpensiveOperation();! asyncResp.resume(result);! }! }).start();! }}!
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 #38: JAX-RS: Message Filter Used to process incoming and outgoing request or response headers public class LogginFilter implements ClientRequestFilter {! ! I O E xcpeubpltiico n v{o!id filter(ClientRequestContext ctx) throws System.out.println(ctx.getMethod());! System.out.println(ctx.getUri());! }! }!
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 #39: JAX-RS: Entity Interceptors Marshalling and unmarshalling HTTP message bodies public class GZipInterceptor implements WriterInterceptor {! ! c t x) {p!ublic void aroundWriteTo(WriterInterceptorContext OutputStream os = ctx.getOutputStream();! ctx.setOutputStream(new GZIPOutputStream(os));! ctx.proceed();! }! }!
77 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 JSON-P 1.0 (JSR 353)
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 #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 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 Batch 1.0 (JSR 352)
81 #42: Batch: Chunk-style Processing Item-oriented Processing Style (primary)
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 #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 #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 #44: Batch: Job/Step/Chunk Listeners Interface Abstract Classes JobListener! AbstractJobListener! StepListener! AbstractStepListener! ChunkListener! AbstractChunkListener! ItemRead/Write/ AbstractItemRead/Write/ ProcessListener! ProcessListener! SkipRead/Write/ ProcessListener! AbstractSkipRead/Write/ ProcessListener! RetryRead/Write/ ProcessListener! AbstractRetryRead/Write/ ProcessListener!
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 #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 #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 #46: Batch: Creating Workflows Flow: Elements that execute together as a unit <flow id="flow1" next="step3"> <step id="step1" next="step2"> . . . </step> <step id="step2"> . . . </step> </flow> <step id="step3"> . . . </step>!
90 #46: Batch: Creating Workflows Split: Concurrent execution of flows <split id="split1" next=" . . . "> <flow id="flow1”> <step id="step1”> . . . </step> </flow> <flow id="flow2”> <step id="step2”> . . . </step> </flow> </split>!
91 #46: Batch: Creating Workflows Decision: Customized way of sequencing between steps, flows, splits <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> ! ! @Named public class MyDecider implements Decider { @Override public String decide(StepExecution[] ses) throws Exception { . . . return "DATA_LOADED"; // or "NOT_LOADED"! } ! }!
92 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 JavaMail 1.5 (JSR 919)
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 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 JCA 1.7 (JSR 322)
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 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 Java EE 7 (JSR 342)
97 #49: Default Resources Default Data Source JNDI name: java:comp/DefaultDataSource @Resource(lookup="java:comp/DefaultDataSource") DataSource myDS; ! @Resource DataSource myDS; !
98 #49: Default Resources Default JMS Connection Factory JNDI name: java:comp/ DefaultJMSConnectionFactory @Resource(lookup="java:comp/DefaultJMSConnectionFactory") ConnectionFactory myCF; @Resource ConnectionFactory myCF;!
99 #49: Default Resources Default Concurrency Utilities Objects JNDI names java:comp/DefaultManagedExecutorService! java:comp/ DefaultManagedScheduledExecutorService! java:comp/DefaultManagedThreadFactory! java:comp/DefaultContextService!
100 #50: Buy our books!
101 References github.com/javaee-samples/javaee7-samples
102

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50 features of Java EE 7 in 50 minutes at JavaZone 2014

  • 1. 1 50 new features of Java EE 7 in 50 minutes Arun Gupta, @arungupta Director, Developer Advocacy Sep 9, 2014
  • 2. 2 #NN: <spec>: <feature>
  • 3. 3 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5
  • 4. 4 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 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 JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 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 JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 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! p r i vlaotgeg evro.ifdi inne(i"t(EInntveorciantgi ocnoCnosnttreuxctt oirc")) ;{!! ilco.ggperor.cefeidn(e()";!Exiting constructor");! ! }! @pAurboluincd IOnbvjoekcet! 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 JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 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 Default ManagedExectuor @Resource ManagedExecutorService executor; ! ManagedExecutorService executor = (ManagedExecutorService) ctx.lookup("java:comp/DefaultManagedExecutorService");!
  • 15. 15 #06: Concurrency: ManagedExecutor Specify in web.xml <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>!
  • 16. 16 #07: Concurrency: ManagedScheduledExecutor Managed version of ScheduledExecutorService! Submit delayed or periodic tasks @Resource ManagedScheduledExecutorService executor;!
  • 17. 17 #07: Concurrency: ManagedScheduledExecutor Access using JNDI InitialContext ctx = new InitialContext(); ManagedScheduledExecutorService executor = (ManagedScheduledExecutorService)ctx.lookup( "java:comp/ DefaultManagedScheduledExecutorService"); ! Can be defined in web.xml as well
  • 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 JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 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 JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 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 BookBean b1;! @Inject BookBean b2;! @Transactional! protected void processRequest(...) {! s_out.println(b1.getReference());! s_out.println(b2.getReference());! }! }!
  • 31. 31 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 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 JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 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",! "j a v a x . j imnst.eTrofpaicceCNoanmnee c=t ionFactory")! @JMSDestinationDefinition(! name = "java:app/jms/MyTopic",! interfaceName = "javax.jms.Topic")! public class ExpensiveOrderEJB {...}!
  • 39. 39 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 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 New methods to existing interfaces ServletInputStream! public void setReadListener(ReadListener listener);! public boolean isFinished();! public boolean isReady();! ServletOutputStream! public setWriteListener(WriteListener listener);! public boolean canWrite();!
  • 42. 42 #22: Servlet: Non-blocking I/O New interfaces 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(); }!
  • 43. 43 #22: Servlet: Non-blocking I/O Only for Asynchronous Servlets AsyncContext context = request.startAsync(); ServletInputStream input = request.getInputStream(); input.setReadListener( new MyReadListener(input, context)); !
  • 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 Deny an HTTP method request for an uncovered HTTP method <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> ! !
  • 47. 47 #24: Servlet: Improved Security Deny an HTTP method request for an uncovered HTTP method <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> ! !
  • 48. 48 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 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 JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 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 JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 JSF 2.2 (JSR 344)
  • 62. 62 #31: JSF: Faces Flow Package reusable flows in JAR ./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!
  • 63. 63 #31: JSF: Faces Flow Package reusable flows in JAR @Named @FlowScoped("flow1") public class Flow1Bean implements Serializable { }! ! @Produces @FlowDefinition public Flow defineFlow(@FlowBuilderParameter FlowBuilder fb) { String flowId = "flow1"; //. . . return fb.getFlow(); }!
  • 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 Apply templates in a reusable and interchangeable manner 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!
  • 66. 66 #32: JSF: Resource Library Contract Apply templates in a reusable and interchangeable manner <f:view contracts=”red”> <ui:composition template="/template.xhtml"> . . . </ui:composition> </f:view> !
  • 67. 67 #33: JSF: Pass-through Attributes HTML5-Friendly Markup <h:inputText type="email" value="#{user.email}"/> ! <input type="text" name="j_idt6:j_idt10"/>! <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 JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 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();! WbeoboTk"a)r;g!et target = client.target("http://www.foo.com/ Itanrvgoceat.tireonq uiensvt(oTcEaXtTi_oPnL A=I N).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);! {} ..c.at}!ch (InterruptedException | ExecutionException e)
  • 72. 72 #37: JAX-RS: Async Server Asynchronous request processing on the server @Path("/async")! public class AsyncResource {! ! @GET! a spynubcRleics p)v o{i!d asyncGet(@Suspended AsyncResponse ! 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 {! ! I O E xcpeubpltiico n v{o!id filter(ClientRequestContext ctx) throws 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 {! ! c t x) {p!ublic void aroundWriteTo(WriterInterceptorContext OutputStream os = ctx.getOutputStream();! ctx.setOutputStream(new GZIPOutputStream(os));! ctx.proceed();! }! }!
  • 77. 77 JAX-RS 2.0 JSON-P JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 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 JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 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/ AbstractItemRead/Write/ ProcessListener! ProcessListener! SkipRead/Write/ ProcessListener! AbstractSkipRead/Write/ ProcessListener! RetryRead/Write/ ProcessListener! AbstractRetryRead/Write/ ProcessListener!
  • 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: Elements that execute together as a unit <flow id="flow1" next="step3"> <step id="step1" next="step2"> . . . </step> <step id="step2"> . . . </step> </flow> <step id="step3"> . . . </step>!
  • 90. 90 #46: Batch: Creating Workflows Split: Concurrent execution of flows <split id="split1" next=" . . . "> <flow id="flow1”> <step id="step1”> . . . </step> </flow> <flow id="flow2”> <step id="step2”> . . . </step> </flow> </split>!
  • 91. 91 #46: Batch: Creating Workflows Decision: Customized way of sequencing between steps, flows, splits <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> ! ! @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 JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 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 JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 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 JSP EL 3.0 JSF 2.2 JSTL Web Socket 1.0 Servlet 3.1 1.0 Bean Validation 1.1 Interceptors 1.2 CDI 1.1 Concurrency 1.0 JTA 1.2 EJB 3.2 JMS 2.0 JPA 2.1 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5 Java EE 7 (JSR 342)
  • 97. 97 #49: Default Resources Default Data Source JNDI name: java:comp/DefaultDataSource @Resource(lookup="java:comp/DefaultDataSource") DataSource myDS; ! @Resource DataSource myDS; !
  • 98. 98 #49: Default Resources Default JMS Connection Factory JNDI name: java:comp/ DefaultJMSConnectionFactory @Resource(lookup="java:comp/DefaultJMSConnectionFactory") ConnectionFactory myCF; @Resource ConnectionFactory myCF;!
  • 99. 99 #49: Default Resources Default Concurrency Utilities Objects JNDI names java:comp/DefaultManagedExecutorService! java:comp/ DefaultManagedScheduledExecutorService! java:comp/DefaultManagedThreadFactory! java:comp/DefaultContextService!
  • 100. 100 #50: Buy our books!
  • 102. 102