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JavaCro'15 - Java EE 8 - An instant snapshot - David Delabassee
1.
David Delabassee -‐
@delabassee Oracle Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Java EE 8 1
2.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Agenda How did we get here? What do we want to do? How can you get involved? 1 2 3 Preview of Java EE 8
3.
Safe Harbor Statement The
following 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. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. 3
4.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Java EE 7 ENTERPRISE EDITION ▪Batch ▪Concurrency ▪Simplified JMS ▪More annotated POJOs ▪Less boilerplate code ▪Cohesive integrated platform DEVELOPER PRODUCTIVITY ▪WebSockets ▪JSON ▪Servlet 3.1 NIO ▪REST MEETING ENTERPRISE DEMANDS Java EE 7 4
5.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Industry Trends We're Seeing Cloud Mobile HTTP/2 SECURITY Reactive Programming User Experience 5
6.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Feedback from the Community • Many sources – Users lists of java.net projects – JIRAs – JavaOne 2013 Java EE BOF and Java EE EG meeting – Outreach by evangelists • Consolidated into Community Survey 6
7.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Java EE 8 Community Survey • 3 parts over 3½ months – 47 questions – 15 fill-‐ins – 1000’s of comments • 4500+ respondents • Prioritization of most-‐popular features 7
8.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. 8
9.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Community-‐Prioritized Features 9 http://glassfish.org/survey
10.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. You asked for it, you got it! 10 Java EE 8 Driven by Community Feedback
11.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Java EE 8 Themes • HTML5 / Web Tier Enhancements • Ease of Development • Infrastructure for running in the Cloud 11
12.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Java EE 8 Themes • HTML5 / Web Tier Enhancements • Ease of Development • Infrastructure for running in the Cloud 12
13.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. HTML5 Support / Web Tier Enhancements • JSON Binding • JSON Processing enhancements • Server-‐sent Events • Action-‐based MVC • HTTP/2 support 13
14.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-‐B • API to marshal/unmarshal Java objects to/from JSON – Similar to JAXB runtime API in XML world • Default mapping of classes to JSON – Annotations to customize the default mappings – JsonProperty, JsonTransient, JsonNillable, JsonValue, … Java API for JSON Binding 14
15.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-‐B • Draw from best practices of existing JSON binding implementations – Jackson, Genson, EclipseLink MOXy, Fleece, JSON-‐lib, Gson, Flexjson, Json-‐io, JSONiJ, Johnzon, Xstream, etc. • Switch JSON binding providers • Implementations compete on common ground Standard API 15
16.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-‐B @Entity public class Person { @Id String name; String gender; @ElementCollection Map<String,String> phones; ... // getters and setters } Person duke = new Person(); duke.setName("Duke"); duke.setGender("M"); phones = new HashMap<String,String>(); phones.put("home", "650-‐123-‐4567"); phones.put("mobile", "650-‐234-‐5678"); duke.setPhones(phones); Marshaller marshaller = new JsonContext().createMarshaller().setPrettyPrinting(true); marshaller.marshal(duke, System.out); { "name":"Duke", "gender":"M", "phones":{ "home":"650-‐123-‐4567", "mobile":"650-‐234-‐5678"} } 16
17.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. • All the way from client to database – JSON-‐B will provide JAX-‐RS a standard way to support “application/json” media type JSON-‐B JPA JSON-‐B Data Source JSON JAX-‐RS Java Objects 17 JSR 367
18.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-‐P 1.1 Java API for JSON Processing 18 • Keep JSON-‐P spec up-‐to-‐date • Track new standards • Add editing operations to JsonObject and JsonArray • Java SE 8 • JSON Big Data
19.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-‐P: Java API for JSON Processing 1.1 • String syntax for referencing a JSON value "/0/phone/mobile" JSON-‐Pointer – IETF RFC 6901 19
20.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-‐P 1.1 JsonArray contacts = … JsonPointer p = Json.createPointer("/0/phones/mobile"); JsonValue v = p.getValue(contacts); [ { "name":"Duke", "gender":"M", "phones":{ "home":"650-‐123-‐4567", "mobile":"650-‐234-‐5678"}}, { "name":"Jane", "gender":"F", "phones":{ "mobile":"707-‐555-‐9999"}} ] 20
21.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-‐P: Java API for JSON Processing 1.1 • String syntax for referencing a JSON value “/0/phone/mobile" • Methods – getValue() – JSON Patch operations: add(), replace(), remove(), move(), copy(), test() JSON-‐Pointer – IETF RFC 6901 21
22.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-‐P 1.1 • Patch is a JSON document – Array of objects / operations for modifying a JSON document – add, replace, remove, move, copy, test [ {"op":"replace","path":"/0/phones/mobile","value":"650-‐111-‐222"}, {"op":"remove","path":"/1"} ] – apply Vs. diff JSON-‐Patch – IETF RFC 6902 22
23.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-‐P 1.1 [ { "op":"replace", "path":"/0/phones/mobile", "value":"650-‐111-‐2222"}, { "op":"remove", "path":"/1"} ] [ { "name":"Duke", "gender":"M", "phones":{ "home":"650-‐123-‐4567", "mobile":"650-‐234-‐5678"}}, { "name":"Jane", "gender":"F", "phones":{ "mobile":"707-‐555-‐9999"}} ] 23
24.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-‐P 1.1 [ { "op":"replace", "path":"/0/phones/mobile", "value":"650-‐111-‐2222"}, { "op":"remove", "path":"/1"} ] [ { "name":"Duke", "gender":"M", "phones":{ "home":"650-‐123-‐4567", "mobile":"650-‐111-‐2222"}}, { "name":"Jane", "gender":"F", "phones":{ "mobile":"707-‐555-‐9999"}} ] 24
25.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-‐P 1.1 [ { "op":"replace", "path":"/0/phones/mobile", "value":"650-‐111-‐2222"}, { "op":"remove", "path":"/1"} ] [ { "name":"Duke", "gender":"M", "phones":{ "home":"650-‐123-‐4567", "mobile":"650-‐111-‐2222"}} ] 25
26.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-‐P 1.1 JSON Query using Lambda Operations JsonArray contacts = ...; List<String> femaleNames = contacts.getValuesAs(JsonObject.class).stream() .filter(x-‐>"F".equals(x.getString("gender"))) .map(x-‐>(x.getString("name")) .collect(Collectors.toList()); 26
27.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-‐P 1.1 JSON Query collecting results in JsonArray JsonArray contacts = ...; JsonArray femaleNames = contacts.getValuesAs(JsonObject.class).stream() .filter(x-‐>"F".equals(x.getString("gender"))) .map(x-‐>(x.getString("name")) .collect(JsonCollectors.toJsonArray()); 27
28.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-‐P 1.1 • Keep JSON-‐P spec up-‐to-‐date • Track new standards • Add editing operations to JsonObject and JsonArray • Java SE 8 • JSON Big Data 28 JSR 374
29.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Server-‐sent Events Should we also standardize a Java API for server-‐sent events? 29
30.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Server-‐sent Events • Part of HTML5 standardization • Server-‐to-‐client streaming of text data • Media type: “text/event-‐stream” • Long-‐lived HTTP connection – Client establishes connection – Server pushes update notifications to client 30
31.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Server-‐sent Events • Servlet, WebSocket, JAX-‐RS or standalone API? • JAX-‐RS deemed most natural fit – Streaming HTTP resources already supported – Small extension • Server API: new media type; EventOutput • Client API: new handler for server side events – Convenience of mixing with other HTTP operations; new media type – Jersey already supports SSE 31
32.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Server-‐sent Events @Path("tickers") public class StockTicker { … @Get @Produces("text/event-‐stream") public EventOutput getQuotes() { EventOutput eo = new EventOutput(); new StockThread(eo).start() return eo; } } JAX-‐RS resource class 32
33.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JAX-‐RS StockThread class class StockThread extends Thread { private EventOutput eo; … @Override public void run() { try { … eo.send(new StockQuote("...")); } catch (IOException e) { … } } } 33 Server-‐sent Events
34.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. WebTarget target = client.target("http://example.com/tickers"); EventSource eventSource = new EventSource(target) { @Override public void onEvent(InboundEvent inboundEvent) { StockQuote sq = inboundEvent.readData(StockQuote.class); // ... } }; eventSource.open(); JAX-‐RS Client 34 Server-‐sent Events
35.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. MVC 1.0 • Why? – Java EE 8 Community Survey – UI landscape is not one size fits all 35 Action-‐based Model-‐View-‐Controller architecture
36.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. MVC 1.0 • Model – CDI, Bean Validation, JPA • View – Facelets, JSP, SPI? • Controller – Invent new technology Vs. Leverage existing technologies? 36 Glues together key Java EE technologies
37.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Controller @Path("hello") @Controller public class HelloController { @GET @View("view1.xhtml") public void hello() { … } } 37
38.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Controller @Path("hello") public class HelloController { @GET @Controller public String hello() { … return "viewA.jsp"; } } 38
39.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Model @Named(“greeting”) @RequestScoped public class Greeting { private String message; public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } } 39
40.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. View <%@ page contentType=“text/html;charset=UTF-8” language=“java” %> <html> <head> <title>Hello</title> </head> <body> <p>Hello ${greeting.message}</p> </body> </html> 40
41.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSR 371 • View Engine – JSP & Facelets – FreeMarker, Velocity, Thymeleaf, Mustache, Handlebars & Pebble • Validation • Exception Mapping Providers • Bootstrap via javax.ws.rs.core.Application • @Produces • CDI Events 41 Early Draft Review
42.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. HTTP/2 • One TCP Connection • Request -‐> Stream – Multiplexed – Prioritised • Binary Framing Layer – Prioritisation – Flow Control – Server Push • Header Compression Multiplexed Binary Frames 42 POST /upload HTTP/1.1 Host: www.test.com Content-‐Type: application/json Content-‐Length: 15 {“name”:“duke”} HTTP 1.1 HTTP/2 HEADERS frame DATA frame
43.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Servlet 4.0 • Request/response multiplexing – Servlet Request as HTTP/2 message • Stream prioritization – Add stream priority to HttpServletRequest • Server push • Binary framing • Upgrade from HTTP 1.1 HTTP/2 Features in Servlet API 43
44.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSF 2.3 • CDI Alignment – @Inject FacesContext, ExternalContext, etc. – Rely on CDI for EL resolving – CDI managed versions of Validator and Converter – Invoking CDI managed bean methods directly from Ajax, etc. • “Adjustments” for MVC – Facelets, JSF scopes, etc. • Misc. – Multi-‐field validation, etc. 44
45.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Java EE 8 Themes • HTML5 / Web Tier Enhancements • Ease of Development • Infrastructure for running in the Cloud 45
46.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Ease of Development • CDI alignment • JAX-‐RS injection alignment • Simplified messaging through CDI-‐based “MDBs” • WebSocket scopes • Pruning of EJB 2.x client view and IIOP interoperability • Security interceptors • … 46
47.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JMS 2.1 • Alternative to EJB message-‐driven beans • Simpler JMS-‐specific annotations • Usable by any CDI bean • No need for MessageListener implementation New API to receive messages asynchronously 47
48.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JMS @MessageDriven(activationConfig = { @ActivationConfigProperty(propertyName="connectionFactoryLookup", propertyValue="jms/myCF"), @ActivationConfigProperty(propertyName="destinationLookup", propertyValue="jms/myQueue"), @ActivationConfigProperty(propertyName="destinationType", propertyValue="javax.jms.queue")}) public class MyMDB implements MessageListener { public void onMessage(Message message) { // extract message body String body = message.getBody(String.class)); // process message body } } JMS MDBs Today 48
49.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JMS 2.1 public class MyListenerBean { @JMSListener(destinationLookup="jms/myQueue") @Transactional public void myCallback(Message message) { ... } } Allow any Java EE bean to be a listener 49
50.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. • Java SE support • Modularity • Enhanced Events • Misc. – AOP – SPI – Interceptors and Decorators enhancements – Cleaning 50 CDI 2.0
51.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. CDI 2.0 • Add new features to CDI without bloating the specification • “Sub specification”(aka “parts”) that can be used independently • Will help CDI adoption • Parts – SE – EE – more? 51 Modularity
52.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. 52 public class ProducerClass { @Inject Event<SomeEvent> someEvent; public void someMethod(...) { ... someEvent.fire(...); } } CDI 2.0 Asynchronous Events public class AnotherClass { public void someObserver(@Observes SomeEvent someEvent) { ... } } public class AsynchProducerClass { @Inject Event<Payload> someEvent; public void anotherMethod() { CompletionStage<…> completionStage someEvent.fireAsync(...); } }
53.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. 53 CDI 2.0 Events Ordering public void importantObserver(@Observes @Priority(1) MyEvent evt) { ... } public void anotherObserver(@Observes @Priority(10) MyEvent evt) { ... }
54.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Pruning Should we prune EJB 2.x remote and local client view (EJBObject, EJBLocalObject, EJBHome, and EJBLocalHome interfaces)? Should we prune CORBA, including support for interoperability by means of IIOP? Candidates for Proposed Optional status 54
55.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Java EE 8 Themes • HTML5 / Web Tier Enhancements • Ease of Development • Infrastructure for running in the Cloud 55
56.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Modernize the Infrastructure • Java EE Management 2.0 – REST-‐based APIs for Management and Deployment • Java EE Security 1.0 – Authorization – Password Aliasing – User Management – Role Mapping – Authentication – REST Authentication For On-‐Premise and for in the Cloud 56
57.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Management and Deployment APIs Should we define new APIs to deploy and manage applications? Should such new Deployment and Management APIs be REST APIs or JMX APIs? 57
58.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Java EE Management 2.0 • Update to JSR 77 (“J2EE Management”) • REST-‐based interfaces to augment (or replace) current Management EJB APIs – Currently used OBJECT_NAME to become URL – Define CRUD operations over individual managed objects – Server-‐sent events used for event support • Simple deployment interfaces also to be considered as part of management API 58
59.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Security Simplifications Should we consider adding Security Interceptors in Java EE 8? Should we simplify authorization by introducing an EL-‐enabled authorization annotation? 59
60.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Java EE Security 1.0 @IsAuthorized("hasRoles('Manager') && schedule.officeHrs") void transferFunds() @IsAuthorized("hasRoles('Manager') && hasAttribute('directReports', employee.id)") double getSalary(long employeeId); @IsAuthorized(ruleSourceName="java:app/payrollAuthRules", rule="report") void displayReport(); Authorization via CDI Interceptors 60
61.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Java EE Security 1.0 Candidate Areas to Enhance Portability, Flexibility, Ease-‐of-‐Use • Authorization Interceptors • Password Aliasing • User Management • Role Mapping • Authentication • REST Authentication 61
62.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Java EE 8 Themes • HTML5 / Web Tier Enhancements • Ease of Development • Infrastructure for running in the Cloud • Java SE 8 alignment 62
63.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Java EE 8 JSRs • Java EE 8 Platform (JSR 366) • CDI 2.0 (JSR 365) • JSON Binding 1.0 (JSR 367) • JMS 2.1 (JSR 368) • Java Servlet 4.0 (JSR 369) • JAX-‐RS 2.1 (JSR 370) • MVC 1.0 (JSR 371) * • JSF 2.3 (JSR 372) • Java EE Management 2.0 (JSR 373) • JSON-‐P 1.1 (JSR 374) • Java EE Security 1.0 (JSR 375) So far….. 63
64.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. And More to Follow… • Bean Validation • EL • Concurrency Utilities • Connector Architecture • WebSocket • Interceptors • JPA • EJB • JTA • JCache • Batch • JavaMail • … 64
65.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Roadmap • Tentative Delivery Schedule – Q3 2014: JSR 369 Expert Group formed – Q1 2015: early draft – Q3 2015: public review – Q4 2015: proposed final draft – Q3 2016: final release • TBC! • Contribute!
66.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. How to Get Involved • Join an Expert Group – http://javaee-‐spec.java.net • Adopt a JSR – http://glassfish.org/adoptajsr • The Aquarium – http://blogs.oracle.com/theaquarium • Java EE Reference Implementation – http://glassfish.org
67.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Thanks 67
68.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. 68
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