java ee 8 - february 2017 update

Copyright©2017,Oracleand/oritsaffiliates.Allrightsreserved.|

JavaEE8–What’scoming?February2017

DavidDelabassee@delabasseeOracle


SafeHarborStatementThefollowingisintendedtooutlineourgeneralproductdirecPon.ItisintendedforinformaPonpurposesonly,andmaynotbeincorporatedintoanycontract.Itisnotacommitmenttodeliveranymaterial,code,orfuncPonality,andshouldnotberelieduponinmakingpurchasingdecisions.Thedevelopment,release,andPmingofanyfeaturesorfuncPonalitydescribedforOracle’sproductsremainsatthesolediscrePonofOracle.

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JavaEEAPIs-BackboneofLeadingOpenSourceProjects

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JavaEEContainers

Microservices WebContainers

WebFrameworks

PaaSREST

Copyright©2017,Oracleand/oritsaffiliates.Allrightsreserved.| 4

The reports of my death

aregreatlyexaggerated.JavaEE

“


Lifeisnotaquietriver...“CharlesRegimbeau


CommunitySurvey

h`ps://blogs.oracle.com/theaquarium/entry/java_ee_8_community_survey2


JavaEE8

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JAX-RS2.1

• ReacPveClientAPI•  Server-sentevents• Non-blockingI/Oinproviders(filters,interceptors…)• HypermediaAPIenhancements•  IntegraPonwithotherJSRsandframeworks

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JAX-RS2.0

Clientclient=ClientBuilder.newClient();

Stringname=client.target("http://example.com/api/hello").request(MediaType.TEXT_PLAIN).get(String.class);//...

client.close();


JAX-RS2.0

//http://example.com/api/read/doe?dpt=1

WebTargetmyResource=client.target("http://example.com/api/read").path("{user}").resolveTemplate("user","joe").queryParam("dpt","1");

Responseresponse=myResource.request(...).get();

//...


JAX-RS2.0

Clientclient=ClientBuilder.newClient();

WebTargetmyResource=client.target("http://example.com/api/read");

Future<String>response=myResource.request(MediaType.TEXT_PLAIN).async().get(String.class);

//...


JAX-RS2.0

WebTargetmyResource=client.target("http://example.com/api/read");

Future<Customer>fCustomer=myResource.request(MediaType.TEXT_PLAIN).async().get(newInvocationCallback<Customer>(){

@Overridepublicvoidcompleted(Customercustomer){//workonthecustomer}

@Overridepublicvoidfailed(Throwablethrowable){//Oops!}

});


JAX-RS2.0


JAX-RS2.0destination.path("recommended").request().header("Rx-User","Async").async().get(newInvocationCallback<List<Destination>>(){@Overridepublicvoidcompleted(finalList<Destination>recommended){finalCountDownLatchinnerLatch=newCountDownLatch(recommended.size());finalMap<String,Forecast>forecasts=Collections.synchronizedMap(newHashMap<>());for(finalDestinationdest:recommended){forecast.resolveTemplate("dest",dest.getDestination()).request().async().get(newInvocationCallback<Forecast>(){@Overridepublicvoidcompleted(finalForecastforecast){forecasts.put(dest.getDestination(),forecast);innerLatch.countDown();}


JAX-RS2.0…@Overridepublicvoidfailed(finalThrowablethrowable){innerLatch.countDown();}});}

try{if(!innerLatch.await(10,TimeUnit.SECONDS)){//timeout}}catch(finalInterruptedExceptione){//Ooops,interrupted!}

//Continuewithprocessing…}

@Overridepublicvoidfailed(finalThrowablethrowable){//Recommendationerror}});


JAX-RS2.1

//JAX-RS2.1CompletionStage<Response>csResponse=ClientBuilder.newClient().target("http://example.com/api").request().rx().get();

Future<Response>fResponse=ClientBuilder.newClient().target("http://example.com/api").request().async().get();

Responseresponse=ClientBuilder.newClient().target("http://example.com/api").request().get();


JAX-RS2.1

CompletionStage<String>cs1=client.target("http://partner.us/api").request().rx().get(String.class);CompletionStage<String>cs2=client.target("http://supplier.be/api").request().rx().get(String.class);//getbothresponsesinaList(whentheyareavailable)CompletionStage<List<String>>listCompletionStage=cs1.thenCombine(cs2,List::of);


JAX-RS2.1

•  Server-SentEvents– Persistent,one-waycommunicaPonchannel– Textprotocol,specialmediatype"text/event-stream"– ServercansendmulPplemessages(events)toaclient– Cancontainid,name,commentretryinterval– Supportedinallmodernbrowsers

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JAX-RS2.1

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SSE–Serversideclasses

• OutboundSseEvent– OutboundSSErepresentaPon

•  SseEventOutputextendsFlow.Subscriber<OutboundSseEvent>– OutboundSSEstream– ApplicaPoncanwriteeventstoit,checkitsstateandcloseit

•  SseBroadcasterextendsFlow.Publisher<OutboundSseEvent>– UsedtoworkwithmulPpleSseEventOutputinstances

•  SseContext– Injectablefactoryfortheaboveclasses


JAX-RS2.1

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SSE–Clientsideclasses

•  InboundSseEvent– InboundServerSentEvent– SimilartoOutboundSseEvent

•  SseEventInput– Low-levelwayforaccessingServerSentEventsstream

•  SseEventSourceextendsFlow.Publisher<InboundSseEvent>– UsedforsubscribingtoServerSentEventstreams


JAX-RS2.1//server-sideinit@InjectSseContextsseContext;

SseBroadcastersseBroadcaster=sseContext.newBroadcaster();

sseBroadcaster.onException((o,e)->{e.printStackTrace();});

sseBroadcaster.onClose(...);

@GET@Path("sse")@Produces(MediaTypes.SERVER_SENT_EVENTS)publicSseEventOutputitemEvents(...){SseEventOutputeventOutput=sseContext.newOutput();//...returneventOutput;}


JAX-RS2.1

//...finalOutboundSseEvent=osesseContext.newEvent().id(...).data(...).comment(...).build();

eventOutput.write(ose);

sseBroadcaster.subscribe(eventOutput);sseBroadcaster.broadcast(ose);


JAX-RS2.1privatefinalWebTargettarget=ClientBuilder.newClient().target("http://host/sse");privateSseEventSourceeventSource;publicvoidconnect(Consumer<String>dataConsumer){eventSource=SseEventSource.target(target).open(es->es.subscribe(newFlow.Subscriber<InboundSseEvent>(){

@OverridepublicvoidonNext(finalInboundSseEventitem){dataConsumer.accept(item.readData());}

//onSubscribe,onError,onComplete

}));}

//...

eventSource.close();


JSON-P1.1

• UpdateJSON-Pspectostaycurrentwithemergingstandards– RFC7159-TheJavaScriptObjectNotaPon(JSON)DataInterchangeFormat– RFC6901–JSONPointer– RFC6902–JSONPatch– RFC7396–JSONMergePatch

• AddediPng/transformaPonoperaPonstoJsonObjectandJsonArray• AddJSONCollectors• BigJSONsupport

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JSON-P1.1

•  JSON-Pointer–IETFRFC6901•  StringsyntaxforreferencingaJSONvalue

E.g."/0/user/address"

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JSON-P1.1

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[{"name":"Duke","gender":"M","phones":{"home":"555-123-456","mobile":"555-321-456"}},{"name":"Jane","gender":"F","phones":{"mobile":"555-999-111"}}]

JsonArraycontacts=…JsonPointerpointer=newJsonPointer("/0/name");JsonValuevalue=pointer.getValue(contacts);


JSON-P1.1

•  JSON-Pointer–IETFRFC6901•  StringsyntaxforreferencingaJSONvalue– E.g."/0/user/address”

• Methods– getValue(),add(),replace(),remove()

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JsonPointerpointer=newJsonPointer("/0/name");JsonArrayresult=pointer.replace(contacts,Json.createValue("Joe"));


JSON-P1.1

•  JSON-Patch–IETFRFC6902• PatchisaJSONdocument– Arrayofobjects/operaPonsformodifyingaJSONdocument– Add,replace,remove,move,copy,test

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JSON-P1.1

[{"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“}}]


JSON-P1.1




JSON-P1.1


[{"name":"Duke","gender":"M","phones":{"home":"650-123-4567","mobile":"650-111-2222"}}]


JSON-P1.1

JsonArraytarget=…;JsonArraypatch=…;

JsonPatchjsonPatch=newJsonPatch(patch);

JsonArrayresult=jsonPatch.apply(target);

JsonPatchBuilderbuilder=newJsonPatchBuilder();JsonArrayresult=builder.add("/Joe/phones/office","1234-567").remove("/Amy/age").apply(target);


JSON-P1.1

OrignalPatchResult

{"a":"b"}{"a":"c"}{"a":"c"}

{"a":"b"}{"b":"c"}{"a":"b","b":"c"}

{"a":"b"}{"a":null}{}

{"a":"b",{"a":null}{"b":"c"}"b":"c"}

…

•  JSON-MergePatch–IETFRFC7386


JSON-P1.1

•  JSON-MergePatch–IETFRFC7386

JsonObjectcontact=…;//ThetargettobepatchedJsonObjectpatch=…;JsonValueoutput=JsonMergePatch.mergePatch(target,patch);


JSON-P1.1

•  JSON-Patch&JSON-MergePatchDiff

JsonValueoutput=JsonMergePatch.diff(original,target);JsonArraydiff=JsonPatch.diff(original,target);


JSON-P1.1

JsonArraycars=...;

JsonArrayaudis=cars.getValuesAs(JsonObject.class).stream().filter(x->"Audi".equals(x.getString("brand"))).map(x->(x.getString("serial"))).collect(Collector.of(()->Json.createArrayBuilder(),(builder,value)->builder.add(value),(builder1,builder2)->builder1.add(builder2),builder->builder.build()));


JSON-P1.1

JsonArraycars=...;

JsonArrayaudis=cars.getValuesAs(JsonObject.class).stream().filter(x->"Audi".equals(x.getString("brand"))).map(x->(x.getString("serial")).collect(JsonCollectors.toJsonArray());


JSON-B1.0

•  JAXB-likeAPItomarshal/unmarshalJavaobjectsto/fromJSONdocuments• DefaultmappingbetweenclassesandJSON• CustomizaPonAPIs– AnnotaPon(@JsonbProperty,@JsonbNillable)– RunPmeconfiguraPonbuilder

• Allowstoswapproviders• NaturalfollowontoJSON-P–closestheJSONsupportgap

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JSON-B1.0

[{"brand":"Apple","model":"iPhone7","stock":1},{"brand":"Samsung","model":"GalaxyNote7","stock":666}]

Phonephone1=newPhone();phone1.setBrand("Apple");phone1.setModel("iPhone7");phone1.setStock(1);…List<Phone>inventory=newArrayList<>();inventory.add(phone1);inventory.add(phone2);Jsonbjsonb=JsonBuilder.create();Stringstock=jsonb.toJson(inventory);


publicclassCustomer{privateintid;

@JsonbProperty("name")privateStringfirstName;

}publicclassCustomer{publicintid;publicStringfirstName;

@JsonbProperty("name")privateStringgetFirstName(){returnfirstName;}

}

JSON-B1.0CustomizaPons



• Namingstrategies–  IDENTITY:myProp– LOWER_CASE_WITH_DASHES:my-prop

– LOWER_CASE_WITH_UNDERSCORES:my_prop– UPPER_CAMEL_CASE:MyProp– UPPER_CAMEL_CASE_WITH_SPACES:MyProp

– CASE_INSENSITIVE:myprop– OracustomimplementaPon

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• Propertyordering– Any,Lexicographical,Reverse

• BinaryDataStrategies– Base64,Base64URL,Byte



• Propertynaming• Propertyordering• Propertytoignore• Nullhandling• CustominstanPaPon

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•  Fieldsvisibility• Date/NumberFormats• BinaryEncoding• Adapters•  ...



Jsonbjsonb=JsonbBuilder.create();//Ordering,namingstrategy,encoding,Locale,…

JsonbConfigconfig=newJsonbConfig().withFormatting(true).withAdapters(newCarAdapter());

Jsonbjsonb=JsonbBuilder.create(config);Jsonbjsonb=JsonBuilder.newBuilder("myProvider");


Servlet4.0

•  SupportforHTTP/2– Request/responsemulPplexing– Serverpush– UpgradefromHTTP1.1

• CompaPbilitywithlatestHTTP1.1RFCs•  Smallercommunity-requestedimprovements(JIRAissues)

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HTTP/2

• BinaryFramingoversingleTCPconnecPon• Request/ResponsemulPplexing•  StreamPrioriPzaPon•  ServerPush• UpgradefromHTTP1.1• HeaderCompression• PreserveHTTPsemanPc•  FlowControl

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Servlet4.0

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PushBuilderbuilder=baseRequest.getPushBuilder();

builder.addHeader("X-Pusher",…);

builder.path(aResource).etag(associated._etag).lastModified(associated._lastModified).push();


JSF2.3

• Be`erCDIIntegraPon– Waymorethingsareinjectable– Finallymarkinglegacymanagedbeansasdeprecated

•  JavaTimesupport• WebSocketIntegraPon• AjaxMethodInvocaPon• ClassLevelBeanValidaPon• UIDataandUIRepeatimprovements

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CDI2.0

• DefinebehaviorofCDIoutsideofaJavaEEcontainer• APItobootstrapaCDIcontainerinJavaSE•  Specsplitinto3parts:– CDICore– CDIforJavaSE– CDIforJavaEE

• ApplyInterceptoronProducer• Observersordering• Asynchronousevents

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CDI2.0

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@InjectEvent<PaymentEvent>debitEvent;//producerdebitEvent.fire(somePayload);

//consumerpublicvoidanObesrver(@ObservesPayloadp){…}


CDI2.0

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//consumerApublicvoidanObesrver(@ObservesPayloadp){…}//consumerBpublicvoidanotherObesrver(@ObservesPayloadp){…}


CDI2.0

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//consumerApublicvoidanObesrver(@Observes@Priority(10)Payloadp){…}//consumerBpublicvoidanotherObesrver(@Observes@Priority(20)Payloadp){…}


CDI2.0

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@InjectEvent<PaymentEvent>debitEvent;//asyncproducerdebitEvent.fireAsync(somePayload);

//asyncconsumerpublicvoidanObesrver(@ObservesAsyncPayloadp){…}


BeanValidaPon2.0

•  EmbraceJavaSE8– SupportfornewDate/TimeAPI– ConstraintsappliedtocollecPonelements– OpPonalwrappers– RepeatableannotaPons

•  Introducenewconstraints– E.g.@NotEmpty,@NotBlank

• AddiPonalfeaturesrequestedfromcommunity

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BeanValidaPon2.0

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List<@NotNull @Email String> emails;

String @NotNull @Email[] emails;

Map<@Valid Customer, @Valid Address> primaryAddressByCustomer;

Optional<@Past LocalDate> getRegistrationDate();

@ZipCode(countryCode = "fr", groups = Default.class, message = "unvalid zip") !@ZipCode(countryCode = "fr", groups = SuperUser.class, message = "zip nok…") !private String zipCode;


SecurityAPIforJavaEE

•  IdenPtyStore– StandardizeapplicaPon-accessibleIdenPtyStore – ValidateCaller'scredenPalsandaccessingrelatedidenPtya`ributes•  UsedbyanauthenPcaPonmechanism(e.g.JASPIC)

• AuthenPcaPonMechanism– SimplifyapplicaPon-accessibleauthenPcaPonmechanisms

•  SecurityContext– Standardizeapla{orm-wideSecurityContext •  ProgrammaPcaccesspoint

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Wrap-up

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JavaEE8

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Connector JAXBJSPDebugging

ManagedBeansJSPConcurrencyEE Interceptors JAX-WS WebSocket

BeanValidaPon JASPIC ServletJMS JTADeployment

Batch JACCDependencyInjecPon JAXR JSTL Management

CDI EJB JAX-RPC WebServicesJSF JPA

CommonAnnotaPons EL JAX-RS WebServices

MetadataJavaMail

CDI

JSON-B Security

BeanValidaPon

JSF

JAX-RS JSON-P

Servlet

JSP

(*)MRsReleasesnotlisted


JavaEE8-StatusSpecificaKons EarlyDraM PublicDraMCDI2.0–JSR365 OngoingJavaEE8–JSR366 2nddra}JSON-B1.0–JSR367 Done!Servlet4.0–JSR369 OngoingJAX-RS2.1–JSR370 ExpectedQ1 ExpectedQ2JSF2.3–JSR372 OngoingJSON-P1.1–JSR374 OngoingSecurity1.0–JSR375 ExpectedQ1BeansValidaPon2.0–JSR380 ExpectedQ1

MVC–JSR371:SpecLeadtransferinprogress


JavaEE8-Summary• Workinprogress– H22017FinalRelease

• Contribute!– AdoptAJSR•  h`ps://community.oracle.com/community/java/jcp/adopt-a-jsr

• OpenSourceReferenceImplementaPons– GlassFish5,Jersey…

• h`p://glassfish.org

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SomePmesyouhavetotakeastepbacktomoveforward.“

ErikaTaylor


Tack!

java ee 8 - february 2017 update

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