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112815 java ee8_davidd
1.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Java EE 8 - Work in Progress David Delabassee @delabassee Oracle Corporation JJUG CCC 2015 Fall
2.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. 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. 2
3.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Program Agenda Quick recap of goals and themes of Java EE 8 What we have accomplished How you can get involved 1 2 3 3
4.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Industry Trends Cloud 4
5.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Java EE 8 – Driven by Community Feedback http://glassfish.org/survey 5
6.
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 6
7.
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 7
8.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-B 1.0 • API to marshal/unmarshal Java objects to/from JSON – Similar to JAXB runtime API in XML world • Draw from best practices of existing JSON binding implementations – MOXy, Jackson, GSON, Genson, Xstream, … – Allow switch of JSON binding providers • Default mapping of classes to JSON – Annotations to customize the default mappings – JsonbProperty, JsonbTransient, JsonbNillable, JsonbValue, … Java API for JSON Binding 8
9.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-B 1.0 @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); Jsonb jsonb = JsonbBuilder.create(); String person = jsonb.toJson(duke); { "name":"Duke", "gender":"M", "phones":{ "home":"650-123-4567", "mobile":"650-234-5678"} } 9
10.
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 • Helper classes and methods to better utilize SE 8’s stream operations Java API for JSON Processing 10
11.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-P 1.1 • JSON-Pointer – IETF RFC 6901 – String syntax for referencing a value "/0/phones/mobile" Tracking new standards 11
12.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-P 1.1 JsonArray contacts = ...; JsonPointer p = new JsonPointer("/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"}} ] 12
13.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-P 1.1 JsonArray contacts = ...; JsonPointer p = new JsonPointer("/0/phones/mobile"); JsonArray newContacts = p.replace(contacts, "650-555-1234"); [ { "name":"Duke", "gender":"M", "phones":{ "home":"650-123-4567", "mobile":"650-234-5678"}}, { "name":"Jane", "gender":"F", "phones":{ "mobile":"707-555-9999"}} ] 13
14.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-P 1.1 JsonArray contacts = ...; JsonPointer p = new JsonPointer("/0/phones/mobile"); JsonArray newContacts = p.replace(contacts, "650-555-1234"); [ { "name":"Duke", "gender":"M", "phones":{ "home":"650-123-4567", "mobile":"650-555-1234"}}, { "name":"Jane", "gender":"F", "phones":{ "mobile":"707-555-9999"}} ] 14
15.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-P 1.1 • JSON-Patch – IETF RFC 6902 • Patch is a JSON document – Array of objects / operations for modifying a JSON document – add, replace, remove, move, copy, test – Must have "op" field and "path" field [ {"op":"replace", "path":"/0/phones/mobile", "value":"650-111-2222"}, {"op":"remove", "path":"/1"} ] Tracking new standards 15
16.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JSON-P 1.1 JSON Query using Streams API 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()); JsonArray femaleNames = contacts.getValuesAs(JsonObject.class).stream() .filter(x->"F".equals(x.getString("gender"))) .map(x->(x.getString("name")) .collect(JsonCollectors.toJsonArray()); 16
17.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Server-sent Events • Part of HTML5 standardization • Server-to-client streaming of text data • Mime type is text/event-stream • Long-lived HTTP connection – Client establishes connection – Server pushes update notifications to client – Commonly used for one-way transmission for period updates or updates due to events 17
18.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Server-sent Events • JAX-RS a 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 (JAX-RS RI) already supports SSE 18
19.
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 19
20.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Server-sent Events JAX-RS StockThread class class StockThread extends Thread { private EventOutput eo; private AtomicBoolean ab = new AtomicBoolean(true); public StockThread(EventOutput eo) { this.eo = eo; } public void terminate() { ab.set(false); } @Override public void run() { while (ab.get()) { try { // ... eo.send(new StockQuote("...")); // ... } catch (IOException e) { // ... } } } } 20
21.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Server-sent Events 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 21
22.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Model View Controller (MVC) • Component-based MVC – Controller provided by the framework – JSF, Wicket, Tapestry… • Action-based MVC – Controllers defined by the application – Struts 2, Spring MVC… 2 Styles 22
23.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. MVC 1.0 • Action-based model-view-controller architecture • Glues together key Java EE technologies: – Model • CDI, Bean Validation, JPA – View • Facelets, JSP – Controller • JAX-RS resource methods 23
24.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. MVC 1.0 @Path("hello") public class HelloController { @Inject private Greeting greeting; @GET @Controller public String hello() { greeting.setMessage("Hello Tokyo!"); return "hello.jsp"; } } Model Controller @Named @RequestScoped public class Greeting { private String message; public String getMessage() { return message; } public void setMessage(message) { this.message = message; } } 24
25.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. MVC 1.0 <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Hello</title> </head> <body> <h1>${greeting.message}</h1> </body> </html> View 25
26.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. HTTP/2 • HTTP 1.1 uses TCP poorly – HTTP flows are short and bursty – TCP was built for long-lived flows • Workarounds – Sprites – Domain sharding – Inlining – File concatenation Address the Limitations of HTTP 1.x 26
27.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. HTTP/2 HTTP/2 Goals • Reduce latency • Address the HOL blocking problem • Support parallelism (without requiring multiple connections) • Define interaction with HTTP 1.x • Retain semantics of HTTP 1.1 Address the Limitations of HTTP 1.x 27
28.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. HTTP/2 • Binary Framing • Request/Response multiplexing over single connection – Fully bidirectional – Multiple streams • Server Push • Header Compression • Upgrade from HTTP 1.1 • Stream Prioritization Features 28
29.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Servlet 4.0 • Binary Framing • Request/Response multiplexing – Servlet Request as HTTP/2 message • Upgrade from HTTP 1.1 • Server Push • Stream prioritization HTTP/2 Features in Servlet API 29
30.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Ease of Development • CDI alignment • Security interceptors • Simplified messaging with JMS message-driven beans • JAX-RS injection alignment • WebSocket scopes • Pruning of EJB 2.x client view and IIOP interoperability 30
31.
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 31
32.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. JMS 2.1 • Continue the ease-of-use improvements started in JMS 2.0 • Improve the API for receiving messages asynchronously – Improve JMS MDBs – Provide alternative to JMS MDBs New API to receive messages asynchronously 32
33.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. CDI 2.0 • Modularity • Java SE support • Asynchronous Events • Event ordering • … 33
34.
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 34
35.
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) 35
36.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Expected MRs and small JSRs • Connector Architecture • WebSocket • Interceptors • JPA • EJB • JTA • Bean Validation • Batch • JavaMail • … 36
37.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. Transparency • Our Java EE 8 JSRs run in the open on java.net – http://javaee-spec.java.net – One project per JSR – jax-rs-spec, mvc-spec, servlet-spec,… – https://java.net/projects/javaee-spec/pages/Specifications • Publically viewable Expert Group mail archive – Users observer lists gets all copies • Publicly accessible download area • Publicly accessible issue tracker / JIRA • … Commitment to JCP transparent processes 37
38.
Copyright © 2015,
Oracle and/or its affiliates. All rights reserved. How to Get Involved • Join an Expert Group project – http://javaee-spec.java.net – https://java.net/projects/javaee-spec/pages/Specifications • Adopt a JSR – http://glassfish.org/adoptajsr • The Aquarium – http://blogs.oracle.com/theaquarium • Java EE 8 Reference Implementation – http://glassfish.org 38
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