Java EE 8 - Work in progress

HKJUG&
December&2015&
David&Delabassee&
@delabassee&
Oracle
Copyright*©*2015,*Oracle*and/or*its*affiliates.*All*rights*reserved.**
What's*Coming*in*Java*EE*8
1

Copyright*©*2015,*Oracle*and/or*its*affiliates.*All*rights*reserved.* @delabassee

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.*

Agenda
How*did*we*get*here?*
What*do*we*want*to*do?*
How*can*you*get*involved?
Preview&of&Java&EE&8

Industry*Trends*We're*Seeing
Cloud
Mobile
HTTP/2
SECURITY
Reactive&Programming
User*Experience

CommunityQPrioritized*Features
7
http://glassfish.org/survey

Java*EE*8*Themes
• HTML5*/*Web*Tier*Enhancements*
• Ease*of*Development*
• Infrastructure*for*running*in*the*Cloud
8

HTML5*Support*/*Web*Tier*Enhancements
• JSON*Binding*
• JSON*Processing*enhancements*
• ServerQsent*Events*
• ActionQbased*MVC*
• HTTP/2*support
9

JSONQP*1.1
Java&API&for&JSON&Processing
• Keep*JSONQP*spec*upQtoQdate*
• Track*new*standards*
• Add*editing*operations*to*JsonObject*and*JsonArray*
• Java*SE*8*
• JSON*Big*Data
10

JSONQP*1.1
• String*syntax*for*referencing*a*JSON*value*
* "/0/phone/mobile"
JSONMPointer&–&IETF&RFC&6901
11

JSONQP*1.1
JsonArray)contacts)=)…)
JsonPointer)pointer)=)new)JsonPointer("/0/name");)
JsonValue)value)=)pointer.getValue(contacts);)
[*
){*
))))"name":"Duke",*
))))"gender":"M",*
))))"phones":{*
)))))))"home":"650K123K4567",*
)))))))"mobile":"650K234K5678"}},*
)){*
))))"name":"Jane",)
))))"gender":"F",)
))))"phones":{*
)))))))"mobile":"707K555K9999"}}*
]*
))
12

JSONQP*1.1
• String*syntax*for*referencing*a*JSON*value*
* “/0/name"*
• Methods*
– getValue()*
– JSON*operations:*add(),*replace(),*remove()
JSONMPointer&–&IETF&RFC&6901
)JsonPointer)pointer)=)new)JsonPointer("/0/name");)
)JsonArray)result)=)pointer.replace(contacts,)Json.createValue("Alex"));
13

JSONQP*1.1
• Patch*is*a*JSON*document*
– Array*of*objects*/*operations*for*modifying*a*JSON*document*
– add,*replace,*remove,*move,*copy,*test
JSONMPatch&–&IETF&RFC&6902
[)
))){"op":"replace","path":"/0/phones/mobile","value":"650K111K222"},)
))){"op":"remove","path":"/1"})
]
14

JSONQP*1.1
[)
){)
))"op":"replace",)
))"path":"/0/phones/mobile",)
))"value":"650211122222"},)
){)
))"op":"remove",)
))"path":"/1"})
]
[*
){*
))))"name":"Duke",*
))))"gender":"M",*
))))"phones":{*
)))))))"home":"650K123K4567",*
)))))))"mobile":"650211122222"}},*
)){*
))))"name":"Jane",)
))))"gender":"F",)
))))"phones":{*
)))))))"mobile":"707K555K9999"}}*
]*
))
16

JSONQP*1.1
[)
){)
))"op":"replace",)
))"path":"/0/phones/mobile",)
))"value":"650K111K2222"},)
){)
))"op":"remove",)
))"path":"/1"})
]
[*
){*
))))"name":"Duke",*
))))"gender":"M",*
))))"phones":{*
)))))))"home":"650K123K4567",*
)))))))"mobile":"650K111K2222"}}*
])
))
17

)JsonArray)target)=)…;)
)JsonArray)patch)=)…;)
))
)JsonPatch)jsonPatch)=)new)JsonPatch(patch);)
)JsonArray)result)=)jsonPatch.apply(target);
JSONQP*1.1
)JsonPatchBuilder)builder)=)new)JsonPatchBuilder();)
)JsonArray)result)=)builder.add("/Joe/phones/office",)"1234K567"))
))))))))))))))))))))))))))).remove("/Amy/age"))
))))))))))))))))))))))))))).apply(contacts);
18

JSONQP*1.1
JSONMMerge&Patch&–&IETF&RFC&7386
Orignal****************Patch*******************Result&
{"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"}*
{*}*************************{"a":*********************{"a":*
*******************************{"bb":******************{"bb":*
***********************************{"ccc":****************{}}}*
***************************************null}}}*
19

JSONQP*1.1
{)
)))))"title":)"Hello!",)
)))))"author":){)
))))))))))))"familyName":)null)
))))))},)
))))))"tags":)[;"example";],)
))))))"phoneNumber":)"+012123245627890")
)})
{)
))))"title":)"Goodbye!",)
))))"author":){)
))))))))"givenName":)"John",)
))))))))"familyName":)"Doe")
)))))},)
)))))"tags":)[)"example",)"sample")],)
)))))"content":)"This)will)be)unchanged")
)})
))
{)
)))))"title":)"Hello!",)
)))))"author":){)
))))))))))))"givenName":)"John")
))))))},)
))))))"tags":)[)"example")],)
))))))"content":)"This)will)be)unchanged",)
))))))"phoneNumber":)"+01K123K456K7890")
)})
))
20

)JsonObject)contact)=)…;)//)The)target)to)be)patched)
)JsonObject)patch)=)…;)
))
)JsonValue)output)=)JsonMergePatch.mergePatch(target,)patch);
JSONQP*1.1
21

JSONQP*1.1
• Reverse*operation*
– Given*two*objects*returns*the*patch*to*apply*(diff)*
JSONMPatch&&&JSONMMerge&Patch&Diff
JsonValue)output)=)JsonMergePatch.diff(original,)target);)
JsonArray)diff)=)JsonPatch.diff(original,)target);
22

JSONQP*1.1
JSON&Query&using&Streams
JsonArray)cars)=)...;)
List<String>)audis)=)cars.getValuesAs(JsonObject.class).stream())
))))))))))))))))))))))))).filter(xK>"Audi".equals(x.getString("brand"))))
))))))))))))))))))))))))).map(xK>(x.getString("serial")))
))))))))))))))))))))))))).collect(Collectors.toList());
23

JSONQP*1.1
JSON&Query&using&Streams
JsonArray)cars)=)...;*
JsonArray)audis)=)cars.getValuesAs(JsonObject.class).stream()*
*****************************************************.filter(xK>"Audi".equals(x.getString("brand")))*
*****************************************************.map(xK>(x.getString("serial"))*
*****************************************************.collect(JsonCollectors.toJsonArray());
24

JSONQP*1.1
• Keep*JSONQP*spec*upQtoQdate*
• Track*new*standards*
• Add*editing*operations*to*JsonObject*and*JsonArray*
• Java*SE*8*
• JSON*Big*Data
JSR&374
25

JSONQB
• 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
26

JSONQB
• Draw*from*best*practices*of*existing*JSON*binding*implementations*
– Jackson,*Genson,*EclipseLink&MOXy,*Fleece,*JSONQlib,*Gson,*Flexjson,*JsonQio,*
JSONiJ,*Johnzon,*Xstream,*etc.*
• Switch*JSON*binding*providers*
• Implementations*compete*on*common*ground
Standard&API
27

JSONQB
// from default JsonbBuilder instance of the default JsonbProvider
Jsonb jsonb = JsonbBuilder.create();
JsonbProvider myProvider =
JsonbProvider.provider("foo.bar.ProviderImpl");
Jsonb jsonb = JsonbBuilder.newBuilder(myProvider);
// UnMarshall
Book book = jsonb.fromJson(new File("myBook.json"), Book.class);
// Marshall
String result = jsonb.toJson(myObject);
jsonb.toJson(myObject, new File(“foo.json”));
jsonb.toJson(myObject, new PrintWriter(System.out));
28

JAXQRS*2.1
29
• Improving*integration*with*CDI*
• JSONQB*Integration*
• NIO*support*in*providers*(filters,*interceptors,*…)*
• Building*upon*the*hypermedia*API*
• JAXQRS*resource*classes*as*MVC*controllers*
• Reactive*API*
• ServerQsent*Events,*etc.

JAXQRS*2.1
…*
CompletionStage<List<String>>)cs)=)
)))))))))))))))))client.target("forecast/{destination}"))
))))))))))))))))))))))).resolveTemplate("destination",)"mars"))
))))))))))))))))))))))).request())
))))))))))))))))))))))).header("RxKUser",)"Java8"))
))))))))))))))))))))))).rx())//)CompletionStageRxInvoker)
))))))))))))))))))))))).get(new)GenericType<List<String>>()){)
)))))))))))))))))))))))});)
cs.thenAccept(l)K>)System.out.println(l));
Reactive&Client&API
30

• Servlet,*WebSocket,*JAXQRS*or*standalone*API?*
• JAXQRS*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
JAXQRS*2.1
ServerMsent&Events

ServerQsent*Events
@Path("tickers"))
public)class)StockTicker){)
…)
)))@Get)
)))@Produces("text/event2stream"))
)))public)EventOutput)getQuotes()){)
)))))))EventOutput)eo)=)new)EventOutput();)
)))))))new)StockThread(eo).start())
)))))))return)eo;)
)))})
}
JAXMRS&resource&class
32

JAXMRS&StockThread&class
class)StockThread)extends)Thread){*
*private)EventOutput)eo;)
)…)
)@Override
public)void)run()){
)))))))try){
…
)))))))))))eo.send(new)StockQuote("..."));)
)))))))})catch)(IOException)e)){)…)}
}
}
ServerQsent*Events
33

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();
JAXMRS&Client
ServerQsent*Events
34

HTTP*1.1*circa*1999
• HoLB*
• HTTP*uses*TCP*poorly*
- HTTP*flows*are*short*and*bursty*
- TCP*was*built*for*longQlived*flows*
• Solutions*
- File*concatenations,*Assets*Inlining,*Domain*sharding,*etc.
Problems&Vs&Solutions
35

HTTP/2
• HTTP/2*
– Hypertext*Transfer*Protocol*version*2*Q*RFC*7540*
– HPACK*Q*Header*Compression*for*HTTP/2*Q*RFC*7541*
• Reduce*latency*
• Address*the*HOL*blocking*problem*
• Support*parallelism*
• Define*interaction*with*HTTP*1.x*
• Retain*semantics*of*HTTP*1.1
Address&the&Limitations&of&HTTP&1.x
36

Copyright*©*2015,*Oracle*and/or*its*affiliates.*All*rights*reserved. 37 @delabassee
HTTP/2
Connections,&Streams,&Messages,&Frames

HTTP/2
• One*TCP*Connection*
• Request*Q>*Stream*
– Multiplexed*
– Prioritised*
• Binary*Framing*Layer*
– Prioritisation*
– Flow*Control*
– Server*Push*
• Header*Compression
Address&HTTP&1.x&Limitations POST*/upload*HTTP/1.1*
Host:*www.test.com*
ContentQType:*application/json*
ContentQLength:*15*
{“name”:“duke”}
HTTP&1.1 HTTP/2
HEADERS&frame
DATA&frame
38

HTTP/2
Server&Push
/index.html*:*stream*1*
/style.css*:*stream*2*
/logo.png*:*stream*4
Client Server
stream&1&
HEADERS
stream&1&
FRAME&x
stream&2&
PROMISE
stream&4&
PROMISE
39

HTTP/2
Header&Compression
40

Servlet*4.0
• Request/response*multiplexing*
– Servlet*Request*as*HTTP/2*message*
• Stream*prioritization*
• Server*push*
• Binary*framing*
• Upgrade*from*HTTP*1.1
HTTP/2&Features&in&Servlet&API
41

Copyright*©*2015,*Oracle*and/or*its*affiliates.*All*rights*reserved. @delabassee
PushBuilder;builder = baseRequest.getPushBuilder();
builder.addHeader(“X-Pusher", …);
builder.path(aResource)
.etag(associated._etag)
.lastModified(associated._lastModified)
.push();
42
Servlet*4.0
Server&Push

ActionQbased*MVC
• Controller(s)*defined*by*the*application*
• Examples*
– Struts*1*(end*of*life),*Struts*2*
– Spring*MVC*
• No*standard*Java*EE*implementation*
– JSR*371*
– “ActionQbased”*MVC*1.0*JSR*
– Targeted*for*inclusion*in*Java*EE*8
43

MVC*1.0
• ActionQbased*MVC*
• Glues*together*key*Java*EE*technologies*
– Model*:*CDI,*Bean*Validation,*JPA*
– *View*:*Facelets,*JSP,*more?*
– *Controller*:*Invent*new*technology*Vs.*Leverage*existing*technologies
44
Principles

Controller
• Combine*data*models*and*views*to*produce*web*application*pages
@Path("hello")
public class HelloController {
@GET
@Controller
public String hello() {
// do something
return “hello.jsp”;
}
}
45

Controller
• Class/method*decorated*with*@Controller
@Path(“hello")
@Controller
@GET @View(“hello.md”)
public void hello() {
// do business stuff
}
}
46

Controller
@Path(“hello")
@Controller
@GET
public Viewable hello() {
// some other stuff
return new Viewable("hello.adoc");
}
}
47

Controller
…
@GET
@Controller
public Response getById(@PathParam("id") String id) {
if (id.length() == 0) {
return Response.status(Response.Status.BAD_REQUEST)
.entity(“error.xhtml”)
.build();
}
}
48

Model
• CDI*@Named*bean*
• javax.mvc.Models*interface
49

Model
@Named(“greeting”)
@RequestScoped
public class Greeting {
private String message;
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}
50

Model
@Path(“hello”)
@Inject
private Models models;
@GET
@Controller
public String hello() {
models.set(“greeting”, new Greeting(“Salut”));
return “hello.jsp”;
}
}
51

View
• Define*the*structure*of*the*output*
• Can*refer*to*model(s)*
• Rendered*by*a*View*Engine*
– JSP*
– Facelets*
• Not*accessible*as*static*resources*
– /WEBQINF/views/*
52

View
<html>
<head>
<title>FreeMarker</title>
</head>
<body>
<p>Hello ${user}</p>
…
</body>
</html>
53

View*Engine
• CDI*based*extension*mechanism*
• javax.mvc.engine.ViewEngine interface*
boolean supports(String view);
void processView(ViewEngineContext context)
throws ViewEngineException;
• Ozark*
– JSP*&*Facelets*
– FreeMarker,*Velocity,*Thymeleaf,*Mustache,*Handlebars,*Jade,*AsciiDoc,*…
54

MVC
• New*annotations*
– @Controller,*@View,*@csrf,*@RedirectScoped*
• Doing*MVC*now*is*not*a*bad*idea*
– Leveraging*CDI,*JAXQRS,*Facelets,*BV*
– More?*Servlet*4.0’s*ServerPush*
– Easy*migration*path*for*JSPs*
• Offers*more*choices
55

JavaServer*Faces
56
• CDI*Alignment*
– @Inject*FacesContext,*ExternalContext,*etc.*
– CDI*managed*versions*of*Validator*and*Converter*
– Rely*on*CDI*for*EL*resolving*
– Invoking*CDI*managed*bean*methods*directly*from*Ajax,*etc.*
• “Adjustments”*for*MVC*
• Misc.*
– MultiQfield*validation,*etc.

Java*EE*8*Themes
57

Ease*of*Development
• CDI*alignment*
• JAXQRS*injection*alignment*
• Simplified*messaging*through*CDIQbased*“MDBs”*
• WebSocket*scopes*
• Pruning*of*EJB*2.x*client*view*and*IIOP*interoperability*
• Security*interceptors*
• …
58

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)
)))})
}))
MDBs&Today
59

JMS*2.1
)@MessageDriven)
)public)class)MyMessageBean)implements;JMSMessageDrivenBean){)
))
)))@JMSQueueListener(destinationLookup=“java:global/TradesQ”))
)))public)void)processTrade(TextMessage)tradeMessage){)
)))))...)
)))})
)}
“Flexible&MDBs”
60

JMS*2.1
@Dependent)
public)class)MyCDIBean21){)
)))))@JMSQueueListener(destinationLookup=“java:global/requestQueue”))
)))))public)void)myMessageCallback(Message)message)){)
)))))))...)
)))))})
}
CDI&beans&as&message&listener?
61

• Java*SE*support*
• Modularity*
• Enhanced*Events*
• Misc.*
– AOP*
– SPI*
– Interceptors*and*Decorators*enhancements*
– Cleaning*
62
CDI*2.0

CDI*2.0
• Add*new*features*to*CDI*without*bloating*the*specification*
• “Sub*specification”(aka*“parts”)*that*can*be*used*independently*
– SE*
– EE*
– more?*
• Will*help*CDI*adoption
63
Modularity

Copyright*©*2015,*Oracle*and/or*its*affiliates.*All*rights*reserved.* @delabassee64
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)ProducerClass){)
; @Inject;Event<SomeEvent>;someEvent;;
) public)void)someMethod(...)){)
) ) ...)
) ) someEvent.fire(...);)
) })
}
CDI*2.0
Asynchronous&Events
public)class)AsynchProducerClass){)))))
;;;;;@Inject;Event<Payload>;someEvent;;
)))))public)void)anotherMethod()){)
)))CompletionStage<…>)completionStage)someEvent.fireAsync(...);)
)))))})
}
public)class)AnotherClass){)
))))))public)void)anotherObserver(@ObservesAsync;SomeEvent;someEvent)){)
)))...)
))))))})
}

CDI*2.0
Events&Ordering
public)void)importantObserver(@Observes;@Priority(1))MyEvent)evt))
{)
...)
})
public)void)anotherObserver(@Observes;@Priority(10))MyEvent)evt))
{)
...)
}

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
66

Java*EE*8*Themes
67

Java*EE*Management*2.0
• Update*to*JSR*77*(“J2EE*Management”)*
• RESTQbased*interfaces*to*augment*(or*replace)*current*Management*EJB*
APIs*
– Currently*used*OBJECT_NAME*to*become*URL*
– Define*CRUD*operations*over*individual*managed*objects*
– ServerQsent*events*used*for*event*support*
• Simple*deployment*interfaces*also*to*be*considered*as*part*of*
management*API
68

Java*EE*Security*1.0
Identity&Store
@Inject**
IdentityStore*idStore;**
Credential*cred*=*new*UsernamePasswordCredential("john",new*Password("secret"));*
CredentialValidationResult*result*=*idStore.validate(cred);*
if*(Status.VALID*==*result.getStatus())*{*
*******groups*=*result.getGroups();*
*******…*
}*else*{*
*******//*Invalid*or*not*validated*
*******…*
}*
69

@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
70

Candidate&Areas&to&Enhance&Portability,&Flexibility,&EaseMofMUse
• Authorization*Interceptors*
• User*Management*
• Role*Mapping*
• Authentication*
• REST*Authentication*
• Password*Aliasing*
71

Java*EE*8*Themes
• Infrastructure*for*running*in*the*Cloud*
• Java*SE*8*alignment
72

Java*EE*8
• Java&EE&8&Platform&(JSR&366)
• CDI&2.0&(JSR&365)
• JSON&Binding&1.0&(JSR&367)
• JMS*2.1*(JSR*368)*
• Servlet*4.0*(JSR*369)*
• JAXQRS*2.1*(JSR*370)
• MVC&1.0&(JSR&371)&
• JSF&2.3&(JSR&372)
• Java*EE*Management*2.0*(JSR*373)
• JSONMP&1.1&(JSR&374)
• Java*EE*Security*1.0*(JSR*375)
So&far…..
73
&&&&&&&&&&Early&Draft&Review

More*to*Follow…
• Batch**
• JPA&
• Bean*Validation*
• Connector*Architecture*
• WebSocket*
• Interceptors*
• EJB*
• JTA*
• JCache*
• Concurrency*Utilities**
• JavaMail*
• …
74

Transparency
• Our*Java*EE*8*JSRs*run*in*the*open*on*java.net*
– http://javaeeQspec.java.net*
– One*project*per*JSR*–*jaxQrsQspec,*mvcQspec,*servletQspec,…*
• Publicly*viewable*Expert*Group*mail*archive*
– Users*observer*lists*gets*all*copies*
• Publicly*accessible*issue*tracker*/*JIRA**
• Publicly*accessible*download*area*
• …
Commitment&to&JCP&transparent&processes
76

Adopt*A*JSR*for*Java*EE*8
• Make*Java*EE*8*the*most*community*driven*platform*to*date!*
- Share*ideas*and*feedback*(e.g.*fill*issues)*
- Follow*EG*discussions,*chime*in*
- Read*early*versions*of*specifications,*Javadocs*
- Write*apps*using*early*RI*builds*
- Write,*speak*about*the*technology*
- Encourage*others*to*participate,*etc.*
• http://glassfish.org/adoptajsr
77

How*to*Get*Involved
• Join*an*Expert*Group*
– http://javaeeQspec.java.net*
• Adopt*a*JSR*
– http://glassfish.org/adoptajsr*
• The*Aquarium*
– http://blogs.oracle.com/theaquarium*
• Java*EE*Reference*Implementation*
– http://glassfish.org
78

Thanks!

Java EE 8 - Work in progress

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