JavaEE.Next(): Java EE 7, 8, and Beyond

Transcription

1 JavaEE.Next(): Java EE 7, 8, and Beyond Reza Rahman Java EE/GlassFish jdt2014_b2 1

2 Agenda Overview A Taste of API Changes Looking Ahead 2

3 The preceding is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The development, release, and timing of any features or functionality described for Oracle s products remains at the sole discretion of Oracle. 3

4 Java EE Past, Present, & Future Java EE 7 J2EE 1.2 Servlet, JSP, EJB, JMS, RMI J2EE 1.3 CMP, Connector Architecture J2EE 1.4 Web Services Mgmt, Deployment, Async Connector Java EE 5 Ease of Development, EJB 3, JPA, JSF, JAXB, JAX-WS, StAX, SAAJ Java EE 6 Pruning, Extensibility Ease of Dev, JAX-RS CDI Validation Web Profile Servlet 3, EJB 3.1 Lite JMS 2, Batch, TX, Concurrency, Interceptor WebSocket JSON JAX-RPC, CMP/ BMP, JSR 88 Web Profile JAX-RS 2 4

5 Bean Validation 1.1 Java EE 7 Portable Extension s Common Annotations 1.2 JSP 2.3 JSF 2.2 JAX-RS 2.0 Servlet 3.1 Managed Beans 1.0 EJB 3.2 EL 3.0 Interceptors 1.2 CDI 1.1 Concurrency Utilities (JSR 236) Batch Applications (JSR 352) Java API for JSON (JSR 353) Connector 1.7 JPA 2.1 JTA 1.2 JMS 2.0 Java API for WebSocket (JSR 356) New Major Release Updated 5

6 JMS 2 API modernization using dependency injection Delivery delay, async send, MDB alignment, JMS resource definition Fixes, clarifications 6

7 JMS 2 Old = "java:global/jms/democonnectionfactory") ConnectionFactory = "java:global/jms/demoqueue") Queue demoqueue; public void sendmessage(string payload) { try { Connection connection = connectionfactory.createconnection(); try { Session session = connection.createsession(false, Session.AUTO_ACKNOWLEDGE); MessageProducer messageproducer = session.createproducer(demoqueue); TextMessage textmessage = session.createtextmessage(payload); messageproducer.send(textmessage); finally { connection.close(); catch (JMSException ex) { Logger.getLogger(getClass().getName()).log(Level.SEVERE, null, ex); 7

8 JMS 2 Simplified private JMSContext = "jms/inboundqueue") private Queue inboundqueue; public void sendmessage (String payload) { context.createproducer().send(inboundqueue, payload); 8

9 JMS 2/Java EE 7 JMS Resource name="java:global/jms/democonnectionfactory", interfacename= "javax.jms.connectionfactory", description="connectionfactory to use in name = "java:global/jms/demoqueue", description = "Queue to use in demonstration", interfacename = "javax.jms.queue", destinationname="demoqueue") 9

10 Java API for WebSocket Higher level API for WebSocket Both client and server-side (Java SE and Java EE) Both declarative and programmatic 10

11 Java API for WebSocket Connection Life /chat ) public class ChatServer { Set<Session> peers public void onopen(session peer) { public void onclose(session peer) { peers.remove(peer);... 11

12 Java API for WebSocket WebSocket public void message(string message, Session client) throws IOException { for (Session session : peers) { if (!session.equals(client)) { session.getremote().sendobject(message); 12

13 Java API for JSON Processing API to parse, generate, transform, query JSON Object Model and Streaming API -- similar to DOM and StAX Binding JSON to Java objects forthcoming 13

14 Java API for JSON Processing Writing JSON (Object Model API) JsonArray value = Json.createArrayBuilder().add(Json.createObjectBuilder().add("type", "home").add("number", " ") ).add(json.createobjectbuilder().add("type", "fax").add("number", " ") ).build(); [ ] { "type": "home, "number": " ", { "type": "fax, "number": " " 14

15 Java API for JSON Processing Reading JSON (Streaming API) { "firstname": "John", "lastname": "Smith", "age": 25, "phonenumber": [ { "type": "home", "number": " ", { "type": "fax", "number": " " ] Event event = parser.next(); event = parser.next(); event = parser.next(); String name = parser.getstring(); // START_OBJECT // KEY_NAME // VALUE_STRING // "John 15

16 JAX-RS 2 Client API Message Filters & Entity Interceptors Asynchronous Processing Server & Client Hypermedia Support Content negotiation 16

17 JAX-RS 2 Client API // Get instance of Client Client client = ClientBuilder.newClient(); // Get customer name for the shipped products String name = client.target(../orders/{orderid/customer ).pathparam( orderid", 10 ).queryparam( shipped", true ).request().get(string.class); 17

18 JPA 2.1 Schema generation Stored procedures Entity Graphs Entity converters Unsynchronized persistence contexts Fixes and enhancements 18

19 JPA 2.1 Schema Generation Properties javax.persistence.schemageneration.[database scripts].action none, create, drop-and-create, drop javax.persistence.schemageneration.scripts.[create drop]-target javax.persistence.schema-generation.[create drop]- script-source javax.persistence.sql-load-script-source javax.persistence.schema-generation.[create drop]- source metadata, script, metadata-then-script, script-then-metadata 19

20 JPA 2.1 procedurename="top10gifts") public class Product { StoredProcedreQuery query = EntityManager.createNamedStoredProcedureQuery( "topgiftsstoredprocedure"); query.registerstoredprocedureparameter(1, String.class, ParameterMode.INOUT); query.setparameter(1, "top10"); query.registerstoredprocedureparameter(2, Integer.class, ParameterMode.IN); query.setparameter(2, 100);... query.execute(); String response = query.getoutputparametervalue(1); 20

21 JTA 1.2 Declarative transactions outside EJB Transaction scope 21

22 JTA Transactional { TxType value() default TxType.REQUIRED; Class[] rollbackon() default {; Class[] dontrollbackon() default dontrollbackon={sqlwarning.class) public class UserService {... 22

23 JSF 2.2 for CDI Managed beans deprecated/cdi alignment Stateless views Resource library contracts File upload component View actions Fixes and enhancements 23

24 JSF 2.2 Pass-Through HTML 5 Components <html>... <input type= color jsf:value= #{colorbean.color2 /> <input type= date jsf:value= #{calendarbean.date1 />... </html> 24

25 JSF 2.2 public class FlowABean implements Serializable { public String getname() { return "FlowABean"; public String getreturnvalue() { return public Flow getflow(flowbuilder builder) { builder.startnode("router1"); builder.flowreturn("success").fromoutcome("/complete"); builder.flowreturn("erroroccurred").fromoutcome("error"); builder.switchnode("router1").navigationcase().condition("#{facesflowscope.customerid == null").fromoutcome("create-customer").defaultoutcome("view-customer"); builder.viewnode("create-customer"); builder.viewnode("maintain-customer-record"); builder.methodcall("upgrade-customer").method("#{maintaincustomerbean.upgradecustomer").defaultoutcome("view-customer"); builder.initializer("#{maintaincustomerbean.initializeflow"); builder.finalizer("#{maintaincustomerbean.cleanupflow"); return builder.getflow(); 25

26 Batch Applications for the Java Platform API for robust batch processing targeted to Java EE, Java SE 26

27 Batch Applications for the Java Platform Step Example <step id= sendstatements > <chunk reader= accountreader processor= accountprocessor writer= writer item-count= 10 /> accountreader")...implements ItemReader... { public Account readitem() { // read account using accountprocessor")...implements ItemProcessor... { Statement processitems(account account) { // read Account, return writer")...implements ItemWriter... { public void writeitems(list<statements> statements) { // use JavaMail to send 27

28 Bean Validation 1.1 Method constraints Bean Validation artifacts injectable Fixes, clarifications and enhancements 28

29 Bean Validation 1.1 Method Level Constraints public void 10 ) Integer String customer) public Date getappointment() {... 29

30 Concurrency Utilities for Java EE Provides simple, safe API for concurrency in Java EE Builds on Java SE concurrency java.util.concurrent.executorservice Relatively low-level API Important enabler for Java EE ecosystem 30

31 Concurrency Utilities for Java EE Managed Task Executor public class TestServlet extends HTTPServlet concurrent/myexecutorservice ) ManagedExecutorService executor; Future future = executor.submit(new MyTask()); class MyTask implements Runnable { public void run() {... // Task logic 31

32 Others Servlet 3.1: Non-blocking I/O, upgrade to WebSocket, security CDI 1.1: EL 3.0: Lambda expressions, collections, operators, standalone API EJB 3.2: Truncating CMP/BMP 32

33 Java EE 8 Community Survey

34 Java EE 8 Possibilities HTTP 2 JSON-B JCache CDI 2 CDI/EJB alignment Security Action-oriented Web framework/html 5 alignment Java SE 8 alignment Cloud, PaaS, multitenancy/saas Configuration, deployment, management, monitoring Further pruning 34

35 Try it Out! /promoted/ 35

36 Resources Java EE Tutorials Digging Deeper Java EE 7 Transparent Expert Groups Java EE 7 Reference Implementation The Aquarium 36

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