JavaOne2015報告会 in Okinawa

JavaOne 2015 フィードバック
日本オラクル株式会社
Fusion Middleware事業統括本部
伊藤敬
Dec. 20th, 2015
Copyright © 2015, Oracle and/or its affiliates. All rights reserved. |
#j1jp

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Oracle Confidential – Internal/Restricted/Highly Restricted 2

Java EE 8 アップデート
3

Java Specification Request ステータス
JSR 366 – Java EE 8 Platform Early Draft Review (EDR)
JSR 369 – Servlet 4.0 – HTTP/2 EDR
JSR 365 – CDI 2.0 – CDI for Java SE, modularity & events EDR 完了
JSR 367 – JSON-B 1.0 – JSON Binding for Java Objects EDR 完了
JSR 371 – MVC 1.0 – Model View Controller, Action-Based, HTML framework EDR
JSR 368 – JMS 2.1 – MDB Improvements, CDI Managed Bean integration EDR
JSR 372 – JSF 2.3 – Integration with WebSocket, MVC, CDI, Java 8 DateTime EDR
JSR 374 – JSON-P 1.1 – Query enhancements, Java SE 8 improvements EDR 完了
JSR 375 – Security 1.0 – Simplifications, Cloud enhancements Early Draft策定中
JSR 370 – JAX-RS 2.1 – NIO, Server-Sent Events Early Draft策定中
JSR 373 – Management 2.0 – REST based Management Early Draft策定中
Java EE 8 仕様策定の状況 (as of 25/10/2015)
4

Java EE 8 主要テーマ
• HTML5 / Web Tier 機能拡張
• 開発をより容易に / CDI のさらなる活用
• クラウドの実行・管理環境化

HTML5のサポート / Web Tier機能拡張
• JSON Binding
• JSON Processing 機能拡張
• Action-based MVC
• HTTP/2のサポート
– Servlet 4.0
• Server-sent Events
– JAX-RS 2.1

JSON-B
• Javaオブジェクト / JSON間のマーシャル/アンマーシャルを実現するAPI
– XMLのJAXBランタイムAPIと類似
• 既存のJSON Binding実装の成果を活用
– MOXy, Jackson, GSON, Genson, Xstream, …
– JSON Bindingプロバイダの変更を可能にする
8
Java API for JSON Binding

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();
jsonb.toJson(duke, System.out) ;
{
"name":"Duke",
"gender":"M",
"phones":{
"home":"650-123-4567",
"mobile":"650-234-5678"}
}

• JSONデータがクライアントからデータベースまで連続的に処理可能に
– JSON-Bによって、JAX-RSで“application/json”メディアタイプが標準的に利用
JSON-B 1.0
JPA JSON-B
Data
Source
JSONJava Objects

JSON-P 1.1
• JSON-P の継続的な更新を維持
• 新しい標準への対応
• JsonObject、JsonArrayに編集機能を追加する
• Java SE 8のStream処理を使いやすくするHelperクラス、メソッドの追加
Java API for JSON Processing

JSON-P 1.1
• JSON-Pointer – IETF RFC 6901
– JSON文書の中の特定の値を参照するための文字列の構文を規定する
"/0/phones/mobile"
新しい標準への対応

JSON-P 1.1
JsonArray contacts = Json.createArrayBuilder()
.add(Json.createObjectBuilder()
.add("name", "Duke")
.add("gender", "M")
.add("phones", Json.createObjectBuilder()
.add("home", "650-123-4567")
.add("mobile", "650-234-5678")))
.add(Json.createObjectBuilder()
.add("name", "Jane")
.add("gender", "F")
.add("phones", Json.createObjectBuilder()
.add("mobile", "707-555-9999")))
.build();
[
{
"name":"Duke",
"gender":"M",
"phones":{
"home":"650-123-4567",
"mobile":"650-234-5678"}},
{
"name":"Jane",
"gender":"F",
"phones":{
"mobile":"707-555-9999"}}
]

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"}}
]

JSON-P 1.1
JsonPointer p =
contacts = p.replace(contacts, "650-555-1212");
[
{
"name":"Duke",
"gender":"M",
"phones":{
"home":"650-123-4567",
"mobile":"650-234-5678"}},
{
"name":"Jane",
"gender":"F",
"phones":{
"mobile":"707-555-9999"}}
]

JSON-P 1.1
JsonPointer p =
contacts = p.replace(contacts, "650-555-1212");
[
{
"name":"Duke",
"gender":"M",
"phones":{
"home":"650-123-4567",
"mobile":"650-555-1212"}},
{
"name":"Jane",
"gender":"F",
"phones":{
"mobile":"707-555-9999"}}
]

JSON-P 1.1
• JSON-Patch – IETF RFC 6902
• Patch is a JSON document
– JSONドキュメントを修整するためのオブジェクト / 処理の配列
– add, replace, remove, move, copy, test
– 必ず “op” フィールドと “path” フィールドが必要
[
{"op":"replace", "path":"/0/phones/mobile", "value":"650-111-2222"},
{"op":"remove", "path":"/1"}
]
新しい標準への対応

JSON-P 1.1
JsonPatchBuilder builder = new JsonPatchBuilder();
JsonArray patch =
builder.replace("0/phones/mobile", "650-111-2222")
.remove("/1")
.build();
[
{
"name":"Duke",
"gender":"M",
"phones":{
"home":"650-123-4567",
"mobile":"650-234-5678"}},
{
"name":"Jane",
"gender":"F",
"phones":{
"mobile":"707-555-9999"}}
]

JSON-P 1.1
JsonArray patch =
.remove("/1")
.build();
JsonArray result = patch.apply(contacts);
[
{
"name":"Duke",
"gender":"M",
"phones":{
"home":"650-123-4567",
"mobile":"650-111-2222"}},
{
"name":"Jane",
"gender":"F",
"phones":{
"mobile":"707-555-9999"}}
]

JSON-P 1.1
JsonArray patch =
.remove("/1")
.build();
JsonArray result = patch.apply(contacts);
[
{
"name":"Duke",
"gender":"M",
"phones":{
"home":"650-123-4567",
"mobile":"650-111-2222"}}
]

Model View Controller (MVC)
• Component-based MVC
– コンポーネントフレームワークを活用するタイプ
– Controller はフレームワークが提供する
– JSF, Wicket, Tapestry…
• Action-based MVC
– Controllerはアプリケーションで定義される
– Struts 2, Spring MVC…
2つのタイプ

MVC 1.0
• アクション・ベースのModel-View-Controller アーキテクチャの追加
• 既存のJava EEテクノロジーを組み合わせて実現：
– Model
• CDI, Bean Validation, JPA
– View
• Facelets, JSP
– Controller
• JAX-RS リソースメソッド

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | 27
JSP, FaceletsCDI Bean
JAX-RS Resource Methods
Bean Validation

MVC 1.0
@Path("hello")
public class HelloController {
@Inject
private Greeting greeting;
@GET
@Controller
public String hello() {
greeting.setMessage("Hello there!");
return "hello.jsp";
}
}
JAX-RS controller

MVC 1.0
@Path("hello")
public class HelloController {
@Inject
private Greeting greeting;
@GET
@Controller
public String hello() {
greeting.setMessage("Hello there!");
return "hello.jsp";
}
}
JAX-RS controller Model
@Named
@RequestScoped
public class Greeting {
private String message;
public String getMessage() {
return message;
}
public void setMessage(message) {
this.message = message;
}
}

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

JSP, FaceletsCDI Bean
JAX-RS Resource Methods
Bean Validation

HTTP/2
• 一つのTCP接続を多重化
• リクエストは “Stream"と呼ば
れるデータ単位で送受信
– 多重化
– Stream単位で重み付け
• バイナリフレームレイヤ
–Server Push
• ヘッダ圧縮
Multiplexed Binary Frames 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

HTTP/2 サーバプッシュ
client server
.html
.js
.png
.css
• SSE/WebSocketとは用途が異なる
• 関連リソースをサーバプッシュ
• htmlの要求がきたら
• 関連のjs, png, css もプッシュする

Servlet 4.0
HTTP/2 サーバプッシュのサンプル
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
PushBuilder builder = request.getPushBuilder();
builder.setPath(“/style.css”);
builder.push();
res.setContentType(“text/html”);
PrintWriter out = res.getPrintWriter();
out.println(“<html>”);
out.println(“<head>”)
out.println(“<link rel=¥”stylesheet¥” type=¥”text/css¥” href=¥“style.css¥”>”);
…
}

開発をより容易に
• CDI 活用範囲の拡大
• Security インターセプタ
• JMS : Message-Briven Beanのメッセージ処理を簡素化
• JAX-RS injection の導入
• WebSocket スコープ
• Pruning - EJB 2.x client view, IIOPとの互換性
37

CDI 2.0
• Modularity
• Java SE support
• Asynchronous Events
• Event ordering
• …
利用範囲の拡大と機能強化
38
http://www.slideshare.net/dblevins1/2015-javaone-ejbcdi-alignment

https://published-rs.lanyonevents.com/published/oracleus2015/sessionsFiles/2550/CON2391_Paumard-
The%20Path%20to%20CDI%202.0.pdf

Java EE仕様策定に貢献しませんか？？
• Adopt a JSR
– http://glassfish.org/adoptajsr
• Join an Expert Group project
– http://javaee-spec.java.net
– https://java.net/projects/javaee-spec/pages/Specifications
• The Aquarium
– http://blogs.oracle.com/theaquarium
• Java EE 8 Reference Implementation
– http://glassfish.org
興味ある方は是非参画ください！！！

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