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Controller8Copyright© 2015 Growth xPartners, Inc. All rights reserved.@Path("hello")public class HelloController {@Injectprivate Greeting greeting;@GET@Controllerpublic String hello() {greeting.setMessage("Hello there!");return "hello.jsp";}}

Controllerのバリエーション9Copyright© 2015 Growth xPartners, Inc. All rights reserved.@GET @Path("void") @View("hello.jsp")public void helloVoid(){}@GET @Path("viewable")public Viewable helloViewable(){return new Viewable("hello.jsp");}@GET @Path("response")public Response helloResponse(){returnResponse.status(Response.Status.OK).entity("hello.jsp").build();}@GET @Path("myview")public MyView helloMyView(){//toString returns "hello.jsp"return new MyView("hello.jsp");}

Validation Bean Validation(JSR349)ベース Validationエラーの扱いについて• 以下の2択 ExceptionMapper<ConstraintViolationException>を実装して共通的に処理する BindingResultをInjectionして、Controllerのメソッド内部で処理する ハンドリングの仕様がprimitiveな印象10Copyright© 2015 Growth xPartners, Inc. All rights reserved.

ExceptionMapperによるハンドリング11Copyright© 2015 Growth xPartners, Inc. All rights reserved.public class FormViolationMapperimplements ExceptionMapper<ConstraintViolationException> {public Response toResponse(ConstraintViolationException e) {Set<ConstraintViolation<?>> set = e.getConstraintViolations();if (!set.isEmpty()) {// fill out ErrorDataBean}return Response.status(Response.Status.BAD_REQUEST).entity("error.jsp").build();}}

Controllerによるハンドリング12Copyright© 2015 Growth xPartners, Inc. All rights reserved.@Path("form")@Controllerpublic class FormController {@Injectprivate BindingResult br;@POST@ValidateOnExecution(type = ExecutableType.NONE)public Response formPost(@Valid @BeanParam FormDataBean f) {if (br.isFailed()) {return Response.status(Response.Status.BAD_REQUEST).entity("error.jsp").build();}return Response.status(Response.Status.OK).entity("data.jsp").build();}}

View 仕様としてサポートを要求するのはJSPとFacelet 他は全てextension Ozarkには以下のextensionがcontribute済み Asciidoc, Freemarker, Handlebars, Jade, JSR 223 (JavaScript) Mustache, StringTemplate, Thymeleaf, Velocity13Copyright© 2015 Growth xPartners, Inc. All rights reserved.

スコープ Controllerのデフォルトスコープはrequest CDIのスコープを使用可能 application/session/request/conversation MVCで @RedirectScoped を定義 PRG(POST-Redirect-GET)パターンをサポート16Copyright© 2015 Growth xPartners, Inc. All rights reserved.

@RedirectScoped17Copyright© 2015 Growth xPartners, Inc. All rights reserved.@Named("bean")@RedirectScopedpublic class Greeting {private String message;public String getMessage() {return message;}public void setMessage(String message) {this.message = message;}}

イベント Observerパターン モニタリング／デバッグ／チューニング用途 BeforeControllerEvent / AfterControllerEventBeforeProcessViewEvent / AfterProcessViewEventControllerRedirectEvent 追加の可能性あり18Copyright© 2015 Growth xPartners, Inc. All rights reserved.

19Copyright© 2015 Growth xPartners, Inc. All rights reserved.@ApplicationScopedpublic class EventObserver{public void onBeforeController(@Observes BeforeControllerEvent e){System.out.println("URI:“+ e.getUriInfo().getRequestURI());}public void onAfterController(@Observes AfterControllerEvent e){System.out.println("Controller:"+ e.getResourceInfo().getResourceMethod());}}

追加されたAPI Json public static JsonString createValue(String value) public static JsonNumber createValue(int value) imilarly for long, double, BigInteger, and BigDecimal JsonReader default JsonValue readValue() JsonWriter default void write(JsonValue value)25Copyright© 2015 Growth xPartners, Inc. All rights reserved.

JsonArray and JsonObject Transformations ビルダーパターンを用いたJsonオブジェクトの変換26Copyright© 2015 Growth xPartners, Inc. All rights reserved.JsonArray value = Json.createArrayBuilder().add(Json.createObjectBuilder().add("type", "home").add("number", "212 555-1234")).build();JsonArray result = Json.createArrayBuilder(value).add(Json.createObjectBuilder().add("type", "fax").add("number", "646 555-4567")).build();

JSON-Pointer RFC6901 JSONの特定値を差すための文字列syntax27Copyright© 2015 Growth xPartners, Inc. All rights reserved.JsonStructure commit = reader.read();JsonPointer p = new JsonPointer("/employee/name");JsonStructure result = p.replace(commit,Json.createValue("Hiroyuki Onaka"))

JSON-PATCH JSON更新処理の標準化 RFC690229Copyright© 2015 Growth xPartners, Inc. All rights reserved.JsonStructure commit = reader.read();JsonPatchBuilder builder = new JsonPatchBuilder();JsonStructure result =builder.add("/John/phones/office", "1234-567").remove("/Amy/age").apply(commit);

JSON-MERGE PATCH RFC7386 JSON間のマージ処理 nullの値をマージするとキーの削除になる application/json-patch+json31Copyright© 2015 Growth xPartners, Inc. All rights reserved.JsonObject removeEntry = Json.createObjectBuilder().add("hiroyuki@fieldnotes.jp", JsonValue.NULL).build();JsonValue newCommit =JsonMergePatch.mergePatch(reader.read(), removeEntry)

JSON Queries with java.util.stream.Stream JsonObject/JsonArrayをMap/Listとしてstream+LambdaでOperation可能に javax.json.stream.JsonCollectors #groupingBy / #toJsonArray / #toJsonObject33Copyright© 2015 Growth xPartners, Inc. All rights reserved.

JSON PROCESSING IN PARSING streamモデルによる大容量Jsonデータの処理 javax.json.stream.JsonParserにAPI追加 getArray / getObject / getArrayStream / getObjectStream34Copyright© 2015 Growth xPartners, Inc. All rights reserved.

37Copyright© 2015 Growth xPartners, Inc. All rights reserved.protected void doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException, IOException {Jsonb jsonb = JsonbBuilder.create();ServletOutputStream out = response.getOutputStream();out.print(jsonb.toJson(new JsonPlans()));out.flush();}デモ： https://github.com/m0mus/jason_plans

References MVC: Model-View-Controller API Version 1.0 Early Draft (SecondEdition) http://download.oracle.com/otndocs/jcp/mvc-1-edr2-spec/index.html JSR-000374 Java API for JSON Processing 1.1 Early Draft ReviewJavadoc http://download.oracle.com/otndocs/jcp/json_p-1_1-edr-spec/index.html JavaOne 2015 セッション資料 Introduction to MVC 1.0 (JSR 371) [CON4176] What’s New in the Java API for JSON Processing? [CON3561] What’s New in Java API for JSON Binding (JSR 367) [CON6155]42Copyright© 2015 Growth xPartners, Inc. All rights reserved.

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