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50 New Features of Java EE 7 in 50 minutes @ Devoxx France 2014

This document discusses 50 new features in Java EE 7 across various specifications. It begins with features in Contexts and Dependency Injection (CDI) 1.1, including default enabling of CDI scanning, and the new @Vetoed annotation. It then covers features in other specifications such as Bean Validation 1.1, interceptors 1.2, concurrency utilities 1.0, JPA 2.1, JTA 1.2, EJB 3.2, JMS 2.0 and more. For each feature, it provides a brief description and example code.

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@arungupta #javaee7 50 new features of Java EE 7 in 50 minutes Arun Gupta Director, Developer Advocacy, Red Hat
@arungupta #javaee7 #NN: <spec>: <feature>
@arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 JPA 2.1 JTA 1.2 EJB 3.2 JMS 2.0 Batch 1.0 JCA 1.7 Java EE 7 JavaMail 1.5
@arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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)
@arungupta #javaee7 #01: CDI: Default enabling Finer scanning control Possible values: all, annotated (default), none! annotated behaves like in Java EE 6! ! <beans ... version="1.1" bean-discovery-mode="all">! <alternatives>! <class>org.agoncal.book.MockGenerator</class>! </alternatives>! </beans>!
@arungupta #javaee7 #02: CDI: @Vetoed Veto the processing of the class or package @Vetoed! public class NonProcessedBean {
 ...! }! ! package-info.java @Vetoed! package com.non.processed.package;!
@arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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)
@arungupta #javaee7 #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());! }! }!
@arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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)
@arungupta #javaee7 #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) ... {! // ...! }! }!
@arungupta #javaee7 #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! ...! }!
@arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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)
@arungupta #javaee7 #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
@arungupta #javaee7 #06: Concurrency: ManagedExecutor @Resource
 ManagedExecutorService executor;
 ! 
 ManagedExecutorService executor = (ManagedExecutorService) ctx
 .lookup("java:comp/DefaultManagedExecutorService");! Default ManagedExectuor
@arungupta #javaee7 #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
@arungupta #javaee7 #07: Concurrency: ManagedScheduledExecutor Managed version of ScheduledExecutorService! Submit delayed or periodic tasks @Resource
 ManagedScheduledExecutorService executor;!
@arungupta #javaee7 #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
@arungupta #javaee7 #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);!
@arungupta #javaee7 #08: Concurrency: ManagedThreadFactory @Resource(name = "DefaultManagedThreadFactory”)! ManagedThreadFactory factory; ! ManagedThreadFactory factory = (ManagedThreadFactory)! ctx.lookup("java:comp/DefaultManagedThreadFactory");

@arungupta #javaee7 #08: Concurrency: ManagedThreadFactory Thread thread = factory.newThread(new MyTask()); ((ManageableThread)thread).isShutdown();

@arungupta #javaee7 #09: Concurrency: DynamicProxy •  Create dynamic proxy objects, adds contextual information available for applications running in Java EE environment •  Classloading, JNDI, Security, …
@arungupta #javaee7 #09: Concurrency: DynamicProxy @Resource
 ContextService service;
 
 
 Runnable proxy = service.createContextualProxy(new MyRunnable(), Runnable.class);
 
 
 Future f = executor.submit(proxy);!
@arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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)
@arungupta #javaee7 #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>!
@arungupta #javaee7 #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;! ...! }!
@arungupta #javaee7 #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();! !
@arungupta #javaee7 #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 {...}!
@arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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)
@arungupta #javaee7 #14: JTA: @Transactional Transaction management on POJO 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) {...}! }!
@arungupta #javaee7 #15: JTA: @TransactionScoped Bean 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();! }! }!
@arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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)
@arungupta #javaee7 #16: EJB: Disable passivation of stateful In some cases increases performance, scalability and robustness @Stateful(passivationCapable = false)! public class ShoppingCart {! ...! }!
@arungupta #javaee7 #17: EJB-Lite: Async + Non-persistent timer @Stateless! public class OrderEJB {! ! @Asynchronous! public void sendEmail (Order order) {! // Very Long task! }! ! @Schedule(hour="2", persistent=false)! public void createDailyReport() {! // ...! }! }!
@arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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)
@arungupta #javaee7 #18: JMS: JMSContext API New simplified API to produce and consume messages @Inject JMSContext ctx;! ! 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);!
@arungupta #javaee7 #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);! }! }!
@arungupta #javaee7 #20: JMS: JMSConnectionFactoryDefinition A JMS ConnectionFactory defined using an annotation @Stateless! @JMSConnectionFactoryDefinition(! name = "java:app/jms/MyConnectionFactory",! interfaceName = "javax.jms.TopicConnectionFactory")! ! ! ! public class ExpensiveOrderEJB {...}!
@arungupta #javaee7 #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 {...}!
@arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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)
@arungupta #javaee7 #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) {
 . . .
 }
 }
 }!
@arungupta #javaee7 #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
@arungupta #javaee7 #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
@arungupta #javaee7 #22: Servlet: Non-blocking I/O AsyncContext context = request.startAsync();
 ServletInputStream input = request.getInputStream();
 input.setReadListener(
 new MyReadListener(input, context)); ! Only for Asynchronous Servlets
@arungupta #javaee7 #23: Servlet: Protocol Upgrade <T extends HttpUpgradeHandler> T HttpServletRequest.upgrade(Class<T> class) throws IOException;
 
 
 ! HttpUpgradeHandler! init(WebConnection wc);! destroy();!
@arungupta #javaee7 #23: Servlet: Protocol Upgrade public interface WebConnection {
 ServletInputStream getInputStream();
 ServletOutputStream getOutputStream();
 }!
@arungupta #javaee7 #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-constraint>
 . . .
 </auth-constraint>
 </web-app> ! ! Deny an HTTP method request for an uncovered HTTP method
@arungupta #javaee7 #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-constraint>
 . . .
 </auth-constraint>
 </web-app> ! ! Deny an HTTP method request for an uncovered HTTP method
@arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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)
@arungupta #javaee7 #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 : session.getOpenSessions()) {! peer.getBasicRemote().sendObject(message);! }
 }
 }!
@arungupta #javaee7 #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) { . . . }!
@arungupta #javaee7 #27: WebSocket: Annotated client endpoint @javax.websocket.ClientEndpoint
 public class MyClient {
 @javax.websocket.OnOpen
 public void open(Session session) { … }
 
 // Lifecycle callbacks
 }!
@arungupta #javaee7 #27: WebSocket: Annotated client endpoint ContainerProvider
 .getWebSocketContainer()
 .connectToServer(
 MyClient.class, 
 URI.create("ws://. . ."));!
@arungupta #javaee7 #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) { . . . }
 
 //. . . 
 }!
@arungupta #javaee7 #28: WebSocket: Programmatic endpoints public class MyApplicationConfig implements ServerApplicationConfig {
 public Set<ServerEndpointConfig> getEndpointConfigs(…) { 
 ServerEndpointConfig.Builder
 .create(MyEndpoint.class, "/websocket”)
 .configurator(new MyConfig())
 .build()
 }
 }!
@arungupta #javaee7 #28: WebSocket: Programmatic endpoints public class MyConfig extends ServerEndpointConfig.Configurator {
 
 public <T> T getEndpointInstance(. . .) { . . . }
 
 public void modifyHandshake(. . .) { . . . }
 
 . . .
 }!
@arungupta #javaee7 #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) {
 . . . 
 }
 }!
@arungupta #javaee7 #29: WebSocket: Encoder and Decoder public class MyDecoder implements Decoder.Text<ChatMessage> {
 public ChatMessage decode(String s) {
 // . . .
 }
 
 public boolean willDecode(String string) {
 // . . .
 }
 
 //. . .
 }
 
 !
@arungupta #javaee7 #29: WebSocket: Encoder and Decoder public class MyEncoder implements Encoder.Text<ChatMessage> {
 
 public String encode(ChatMessage chatMessage) {
 // . . .
 }
 ! // . . .
 }!
@arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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)
@arungupta #javaee7 #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");!
@arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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)
@arungupta #javaee7 #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
@arungupta #javaee7 #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
@arungupta #javaee7 #31: JSF: Faces Flow Package reusable flows in JAR #{flowScope}: Local flow storage #{facesContext.application.flowHandler.currentFlow}: Returns true if within a flow
@arungupta #javaee7 #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
@arungupta #javaee7 #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
@arungupta #javaee7 #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"/>! !
@arungupta #javaee7 #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
 } !
@arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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)
@arungupta #javaee7 #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);!
@arungupta #javaee7 #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) {
 ...
 }!
@arungupta #javaee7 #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();! }}!
@arungupta #javaee7 #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!
@arungupta #javaee7 #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());! }! }!
@arungupta #javaee7 #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!
@arungupta #javaee7 #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();! }! }!
@arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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)
@arungupta #javaee7 #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();!
@arungupta #javaee7 #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();! }! }!
@arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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)
@arungupta #javaee7 #42: Batch: Chunk-style Processing Item-oriented Processing Style (primary)
@arungupta #javaee7 #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! }! !
@arungupta #javaee7 #43: Batch: Batchlet-style Processing Task-oriented processing style <step id=”transferFile”>! <batchlet ref=“MyFileTransfer” />! </step>! …implements Batchlet {! @Override
 public void process() {
 // Transfer file! }! !
@arungupta #javaee7 #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>! !
@arungupta #javaee7 #44: Batch: Job/Step/Chunk Listeners Interface Abstract Classes JobListener! AbstractJobListener! StepListener! AbstractStepListener! ChunkListener! AbstractChunkListener! ItemRead/Write/ProcessListener! AbstractItemRead/Write/ProcessListener! SkipRead/Write/ProcessListener! AbstractSkipRead/Write/ProcessListener! RetryRead/Write/ProcessListener! AbstractRetryRead/Write/ ProcessListener!
@arungupta #javaee7 #44: Batch: Job/Step/Chunk Listeners @Named
 public class MyJobListener extends AbstractJobListener {
 
 @Override
 public void beforeJob() throws Exception { . . . }
 
 @Override
 public void afterJob() throws Exception { . . . }
 }!
@arungupta #javaee7 #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>!
@arungupta #javaee7 #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>!
@arungupta #javaee7 #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
@arungupta #javaee7 #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
@arungupta #javaee7 #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"! } ! }!
@arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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)
@arungupta #javaee7 #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;!
@arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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)
@arungupta #javaee7 #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",
 )!
@arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 Web Socket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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)
@arungupta #javaee7 #49: Default Resources JNDI name: java:comp/DefaultDataSource Default Data Source @Resource(lookup="java:comp/DefaultDataSource")
 DataSource myDS;
 ! @Resource
 DataSource myDS; !
@arungupta #javaee7 #49: Default Resources JNDI name: java:comp/DefaultJMSConnectionFactory
 
 
 @Resource(lookup="java:comp/DefaultJMSConnectionFactory") 
 ConnectionFactory myCF; @Resource
 ConnectionFactory myCF;! Default JMS Connection Factory
@arungupta #javaee7 #49: Default Resources JNDI names java:comp/DefaultManagedExecutorService! java:comp/DefaultManagedScheduledExecutorService! java:comp/DefaultManagedThreadFactory! java:comp/DefaultContextService! Default Concurrency Utilities Objects
@arungupta #javaee7 #50: Buy our books!
@arungupta #javaee7 References github.com/javaee-samples/javaee7-samples github.com/javaee-samples/javaee7-hol
@arungupta #javaee7

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50 New Features of Java EE 7 in 50 minutes @ Devoxx France 2014

  • 1.
    @arungupta #javaee7 50 new featuresof Java EE 7 in 50 minutes Arun Gupta Director, Developer Advocacy, Red Hat
  • 2.
  • 3.
    @arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 WebSocket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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.
    @arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 WebSocket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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.
    @arungupta #javaee7 #01: CDI: Defaultenabling Finer scanning control Possible values: all, annotated (default), none! annotated behaves like in Java EE 6! ! <beans ... version="1.1" bean-discovery-mode="all">! <alternatives>! <class>org.agoncal.book.MockGenerator</class>! </alternatives>! </beans>!
  • 6.
    @arungupta #javaee7 #02: CDI: @Vetoed Vetothe processing of the class or package @Vetoed! public class NonProcessedBean {
 ...! }! ! package-info.java @Vetoed! package com.non.processed.package;!
  • 7.
    @arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 WebSocket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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.
    @arungupta #javaee7 #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.
    @arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 WebSocket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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.
    @arungupta #javaee7 #04: Interceptors: AroundConstruct Interceptorassociated 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.
    @arungupta #javaee7 #05: Interceptors: @Priority Prioritizinginterceptor 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.
    @arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 WebSocket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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.
    @arungupta #javaee7 #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.
    @arungupta #javaee7 #06: Concurrency: ManagedExecutor @Resource
 ManagedExecutorServiceexecutor;
 ! 
 ManagedExecutorService executor = (ManagedExecutorService) ctx
 .lookup("java:comp/DefaultManagedExecutorService");! Default ManagedExectuor
  • 15.
    @arungupta #javaee7 #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.
    @arungupta #javaee7 #07: Concurrency: ManagedScheduledExecutor Managed versionof ScheduledExecutorService! Submit delayed or periodic tasks @Resource
 ManagedScheduledExecutorService executor;!
  • 17.
    @arungupta #javaee7 #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.
    @arungupta #javaee7 #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.
    @arungupta #javaee7 #08: Concurrency: ManagedThreadFactory @Resource(name ="DefaultManagedThreadFactory”)! ManagedThreadFactory factory; ! ManagedThreadFactory factory = (ManagedThreadFactory)! ctx.lookup("java:comp/DefaultManagedThreadFactory");

  • 20.
    @arungupta #javaee7 #08: Concurrency: ManagedThreadFactory Thread thread= factory.newThread(new MyTask()); ((ManageableThread)thread).isShutdown();

  • 21.
    @arungupta #javaee7 #09: Concurrency: DynamicProxy • Create dynamic proxy objects, adds contextual information available for applications running in Java EE environment •  Classloading, JNDI, Security, …
  • 22.
    @arungupta #javaee7 #09: Concurrency: DynamicProxy @Resource
 ContextServiceservice;
 
 
 Runnable proxy = service.createContextualProxy(new MyRunnable(), Runnable.class);
 
 
 Future f = executor.submit(proxy);!
  • 23.
    @arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 WebSocket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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.
    @arungupta #javaee7 #10: JPA: SchemaGeneration 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.
    @arungupta #javaee7 #11: JPA: @Index Definesadditional 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.
    @arungupta #javaee7 #12: JPA: UnsynchronizedPersistence 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.
    @arungupta #javaee7 #13: JPA: StoredProcedure 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.
    @arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 WebSocket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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.
    @arungupta #javaee7 #14: JTA: @Transactional Transactionmanagement on POJO 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.
    @arungupta #javaee7 #15: JTA: @TransactionScoped Beanwhose 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.
    @arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 WebSocket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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.
    @arungupta #javaee7 #16: EJB: Disablepassivation of stateful In some cases increases performance, scalability and robustness @Stateful(passivationCapable = false)! public class ShoppingCart {! ...! }!
  • 33.
    @arungupta #javaee7 #17: EJB-Lite: Async+ Non-persistent timer @Stateless! public class OrderEJB {! ! @Asynchronous! public void sendEmail (Order order) {! // Very Long task! }! ! @Schedule(hour="2", persistent=false)! public void createDailyReport() {! // ...! }! }!
  • 34.
    @arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 WebSocket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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.
    @arungupta #javaee7 #18: JMS: JMSContextAPI New simplified API to produce and consume messages @Inject JMSContext ctx;! ! 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.
    @arungupta #javaee7 #19: JMS: Autocloseable SeveralJMS 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.
    @arungupta #javaee7 #20: JMS: JMSConnectionFactoryDefinition A JMSConnectionFactory defined using an annotation @Stateless! @JMSConnectionFactoryDefinition(! name = "java:app/jms/MyConnectionFactory",! interfaceName = "javax.jms.TopicConnectionFactory")! ! ! ! public class ExpensiveOrderEJB {...}!
  • 38.
    @arungupta #javaee7 #21: JMS: JMSDestinationDefinition AJMS 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.
    @arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 WebSocket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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.
    @arungupta #javaee7 #22: Servlet: Non-blockingI/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.
    @arungupta #javaee7 #22: Servlet: Non-blockingI/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.
    @arungupta #javaee7 #22: Servlet: Non-blockingI/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.
    @arungupta #javaee7 #22: Servlet: Non-blockingI/O AsyncContext context = request.startAsync();
 ServletInputStream input = request.getInputStream();
 input.setReadListener(
 new MyReadListener(input, context)); ! Only for Asynchronous Servlets
  • 44.
    @arungupta #javaee7 #23: Servlet: ProtocolUpgrade <T extends HttpUpgradeHandler> T HttpServletRequest.upgrade(Class<T> class) throws IOException;
 
 
 ! HttpUpgradeHandler! init(WebConnection wc);! destroy();!
  • 45.
    @arungupta #javaee7 #23: Servlet: ProtocolUpgrade public interface WebConnection {
 ServletInputStream getInputStream();
 ServletOutputStream getOutputStream();
 }!
  • 46.
    @arungupta #javaee7 #24: Servlet: ImprovedSecurity <web-app . . . version="3.1"> 
 <web-resource-collection>
 <url-pattern>/account/*</url-pattern> 
 <http-method>GET</http-method>
 </web-resource-collection>
 <auth-constraint>
 . . .
 </auth-constraint>
 </web-app> ! ! Deny an HTTP method request for an uncovered HTTP method
  • 47.
    @arungupta #javaee7 #24: Servlet: ImprovedSecurity <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-constraint>
 . . .
 </auth-constraint>
 </web-app> ! ! Deny an HTTP method request for an uncovered HTTP method
  • 48.
    @arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 WebSocket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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.
    @arungupta #javaee7 #25: WebSocket: Annotatedserver 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 : session.getOpenSessions()) {! peer.getBasicRemote().sendObject(message);! }
 }
 }!
  • 50.
    @arungupta #javaee7 #26: WebSocket: Lifecyclecallbacks @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.
    @arungupta #javaee7 #27: WebSocket: Annotatedclient endpoint @javax.websocket.ClientEndpoint
 public class MyClient {
 @javax.websocket.OnOpen
 public void open(Session session) { … }
 
 // Lifecycle callbacks
 }!
  • 52.
    @arungupta #javaee7 #27: WebSocket: Annotatedclient endpoint ContainerProvider
 .getWebSocketContainer()
 .connectToServer(
 MyClient.class, 
 URI.create("ws://. . ."));!
  • 53.
    @arungupta #javaee7 #28: WebSocket: Programmatic endpoints publicclass 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.
    @arungupta #javaee7 #28: WebSocket: Programmatic endpoints publicclass MyApplicationConfig implements ServerApplicationConfig {
 public Set<ServerEndpointConfig> getEndpointConfigs(…) { 
 ServerEndpointConfig.Builder
 .create(MyEndpoint.class, "/websocket”)
 .configurator(new MyConfig())
 .build()
 }
 }!
  • 55.
    @arungupta #javaee7 #28: WebSocket: Programmatic endpoints publicclass MyConfig extends ServerEndpointConfig.Configurator {
 
 public <T> T getEndpointInstance(. . .) { . . . }
 
 public void modifyHandshake(. . .) { . . . }
 
 . . .
 }!
  • 56.
    @arungupta #javaee7 #29: WebSocket: Encoderand 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.
    @arungupta #javaee7 #29: WebSocket: Encoderand Decoder public class MyDecoder implements Decoder.Text<ChatMessage> {
 public ChatMessage decode(String s) {
 // . . .
 }
 
 public boolean willDecode(String string) {
 // . . .
 }
 
 //. . .
 }
 
 !
  • 58.
    @arungupta #javaee7 #29: WebSocket: Encoderand Decoder public class MyEncoder implements Encoder.Text<ChatMessage> {
 
 public String encode(ChatMessage chatMessage) {
 // . . .
 }
 ! // . . .
 }!
  • 59.
    @arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 WebSocket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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.
    @arungupta #javaee7 #30: Expression Langauge: ELProcessor UseEL 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.
    @arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 WebSocket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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.
    @arungupta #javaee7 #31: JSF: FacesFlow ./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.
    @arungupta #javaee7 #31: JSF: FacesFlow @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.
    @arungupta #javaee7 #31: JSF: FacesFlow Package reusable flows in JAR #{flowScope}: Local flow storage #{facesContext.application.flowHandler.currentFlow}: Returns true if within a flow
  • 65.
    @arungupta #javaee7 #32: JSF: ResourceLibrary 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.
    @arungupta #javaee7 #32: JSF: ResourceLibrary Contract <f:view contracts=”red”>
 <ui:composition template="/template.xhtml">
 . . .
 </ui:composition>
 </f:view>
 ! Apply templates in a reusable and interchangeable manner
  • 67.
    @arungupta #javaee7 #33: JSF: Pass-throughAttributes <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.
    @arungupta #javaee7 #34: JSF: FileUpload 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.
    @arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 WebSocket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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.
    @arungupta #javaee7 #35: JAX-RS: ClientAPI 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.
    @arungupta #javaee7 #36: JAX-RS: AsyncClient 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.
    @arungupta #javaee7 #37: JAX-RS: AsyncServer 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.
    @arungupta #javaee7 #38: JAX-RS: MessageFilter Used to process incoming and outgoing request or response headers Filters on client side ClientRequestFilter! ClientResponseFilter! Filters on server side ContainerRequestFilter! ContainerResponseFilter!
  • 74.
    @arungupta #javaee7 #38: JAX-RS: MessageFilter 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.
    @arungupta #javaee7 #39: JAX-RS: EntityInterceptors 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.
    @arungupta #javaee7 #39: JAX-RS: EntityInterceptors 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.
    @arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 WebSocket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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.
    @arungupta #javaee7 #40: JSON-P: JSONBuilder 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.
    @arungupta #javaee7 #41: JSON-P: JsonParser Event-basedparser 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.
    @arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 WebSocket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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.
    @arungupta #javaee7 #42: Batch: Chunk-styleProcessing Item-oriented Processing Style (primary)
  • 82.
    @arungupta #javaee7 #42: Batch: Chunk-styleProcessing <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.
    @arungupta #javaee7 #43: Batch: Batchlet-styleProcessing Task-oriented processing style <step id=”transferFile”>! <batchlet ref=“MyFileTransfer” />! </step>! …implements Batchlet {! @Override
 public void process() {
 // Transfer file! }! !
  • 84.
    @arungupta #javaee7 #44: Batch: Job/Step/ChunkListeners <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.
    @arungupta #javaee7 #44: Batch: Job/Step/ChunkListeners Interface Abstract Classes JobListener! AbstractJobListener! StepListener! AbstractStepListener! ChunkListener! AbstractChunkListener! ItemRead/Write/ProcessListener! AbstractItemRead/Write/ProcessListener! SkipRead/Write/ProcessListener! AbstractSkipRead/Write/ProcessListener! RetryRead/Write/ProcessListener! AbstractRetryRead/Write/ ProcessListener!
  • 86.
    @arungupta #javaee7 #44: Batch: Job/Step/ChunkListeners @Named
 public class MyJobListener extends AbstractJobListener {
 
 @Override
 public void beforeJob() throws Exception { . . . }
 
 @Override
 public void afterJob() throws Exception { . . . }
 }!
  • 87.
    @arungupta #javaee7 #45: Batch: Partition <step>
 <chunkitem-count="3">
 <reader ref="myItemReader">
 <properties>
 <property name="start" value="#{partitionPlan['start']}"/>
 <property name="end" value="#{partitionPlan['end']}"/>
 </properties> 
 </reader>
 . . .
 </chunk>!
  • 88.
    @arungupta #javaee7 #45: Batch: Partition <partition>
 <planpartitions="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.
    @arungupta #javaee7 #46: Batch: CreatingWorkflows <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.
    @arungupta #javaee7 #46: Batch: CreatingWorkflows <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.
    @arungupta #javaee7 #46: Batch: CreatingWorkflows <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.
    @arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 WebSocket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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.
    @arungupta #javaee7 #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.
    @arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 WebSocket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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.
    @arungupta #javaee7 #48: Java ConnectorArchitecture @ConnectionDefinition(
 connection="MyConnection.class",
 connectionImpl="MyConnectionImpl.class",
 connectionFactory="MyConnectionFactory.class",
 connectionFactoryImpl="MyConnectionFactoryImpl.class"
 )
 ! @AdministeredObjectDefinition(
 className="MyQueueImpl.class",
 name="java:comp/MyQueue",
 resourceAdapter="myAdapter",
 )!
  • 96.
    @arungupta #javaee7 JAX-RS 2.0 JSON-P 1.0 WebSocket 1.0Servlet 3.1 JSF 2.2EL 3.0JSP JSTL BeanValidation1.1 Interceptors1.2 CDI1.1 Concurrency1.0 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.
    @arungupta #javaee7 #49: Default Resources JNDIname: java:comp/DefaultDataSource Default Data Source @Resource(lookup="java:comp/DefaultDataSource")
 DataSource myDS;
 ! @Resource
 DataSource myDS; !
  • 98.
    @arungupta #javaee7 #49: Default Resources JNDIname: java:comp/DefaultJMSConnectionFactory
 
 
 @Resource(lookup="java:comp/DefaultJMSConnectionFactory") 
 ConnectionFactory myCF; @Resource
 ConnectionFactory myCF;! Default JMS Connection Factory
  • 99.
    @arungupta #javaee7 #49: Default Resources JNDInames java:comp/DefaultManagedExecutorService! java:comp/DefaultManagedScheduledExecutorService! java:comp/DefaultManagedThreadFactory! java:comp/DefaultContextService! Default Concurrency Utilities Objects
  • 100.
  • 101.
  • 102.