cdi essential recipes at java day tokyo 2015

Java EE 7

Fusion Middleware Java Java Day Tokyo 2015 201548

Copyright 2015, Oracle and/or its aliates. All rights reserved. |


Oracle Conden@al Internal/Restricted/Highly Restricted

4

OracleJavaOracle Corpora@on

Copyright 2015, Oracle and/or its aliates. All rights reserved. | 5

1. 2. Managed Bean 3. Interceptor 4. Bean Validation 5. DI 6. CDI

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@torazuka


JPE 1.0 J2EE 1.2 J2EE 1.3 J2EE 1.4 Java EE 5 Java EE 6 Java EE 7

20065 200912 20135

J2EE (>_


( () ()


Java EE 7

Java EE 7


JSP 2.3 /JSTL JSON-P 1.0 EL 3.0 Servlet 3.1

Java EE 7

WebSocket 1.0 JAX-RS 2.0 JSF 2.2

DI 1.0 / CDI 1.1 / EJB 3.2

JPA 2.1

JTA 1.2

JMS 2.0

JCA 1.7

Batch 1.0 JavaMail 1.5

Intercep

tors 1.2

Bean

ValidaO

on 1.1

Common

Ann

otaO

on 1.2

Man

aged

Bea

n 1.0

Concurrency UOl fo

r EE 1.0

Java EE 7

Java EE 7


DB

Queue


Java Common Annotation JSR-250 Managed Bean JSR-316 Interceptor JSR-318

Bean Validation JSR-349 DI JSR-330 CDI JSR-346

EJB JSR-345



@torazuka




EJB JSR-345


JSR-250 Common Annotation (EE)

Web EJB JSR-250 EE.6.29 Common Annotations for the JavaTM Platform 1.2 Requirements

Resource Resources PostConstructPreDestroy RunAs DeclareRolesRolesAllowed PermitAll DenyAllManagedBean DataSourceDeniOon DataSourceDeniOonsPriority


JSR-316 Managed Bean

JSF Managed Bean

CDI EJB

EE @ManagedBean

Managed Bean

JSR-316 Managed Bean


Web

CDI

EJB

Managed Bean


Managed Bean #1 : JMS (Queue, Topic) ORB


Ini@alContext ic = new Ini@alContext(); ManagedExecutorService managedExecSvc = (ManagedExecutorService ) ic.lookup (" java:comp/DefaultManagedExecutorService"); mangedExecSvc.submit(() -> System.out.println(New Thread));

Java EE

JNDI


@Resource(name = concurrent/DefaultManagedExecutorService") ManagedExecutorService mangedExecSvc; public void foo(){ mangedExecSvc.submit(() -> System.out.println(New Thread)); }

Java EE @Resource

@Resource


javax.annota@on @Resource JNDI

JMS ORB

@Resource JNDI

JSR-250 Common Annotation


#2

Managed Bean


public class Foo() { @Resource(name = concurrent/DefaultManagedExecutorService") ManagedExecutorService mangedExecSvc; public Foo(){ mangedExecSvc.submit(() -> System.out.println(Init something)); } }

java.lang.NullPointerExcepOon


@PostConstruct

public class Foo() { @Resource(name = concurrent/DefaultManagedExecutorService") ManagedExecutorService mangedExecSvc; @PostConstruct public void init (){ mangedExecSvc.submit(() -> System.out.println(Init something)); } }

EE @PostConstruct


javax.annota@on @PostConstruct

@PreDestroy

CDI EJB Proxy Proxy (2) Why is the constructor invoked twice when a normal scoped bean is created? http://www.cdi-spec.org/faq/#accordion7

JSR-250 Common Annotation


Web

CDI

EJB

: @Resource : @PostConstruct : @PreDestroy

Managed Bean



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EJB JSR-345


A B C D E

Interceptor :


Java EE 5 (EJB 3.0) @AroundInvoke @Intercerptors @ExcludeDefaultInterceptors @ExcludeClassInterceptors

EJB

Bean XML

Java EE 6 (EJB 3.1) CDI @InterceptorBinding @Interceptor @AroundTimeout

XML

Java EE 7 (EJB 3.1 : Maintenance Release) Interceptor.Priority @AroundConstruct

Interceptor


#3

Interceptor


public void executeSomeMethod1 () { long start = System.currentTimeMillis(); // // long end = System.currentTimeMillis(); // long Ome = end - start; logger.log(Level.DEBUG, (ms) : + Ome); }

?


public class SomeLogic { @MySimpleProlerInterceptor public void executeSomeMethod1 () { // } }


1. Interceptor

2. Interceptor

3. Interceptor

Java EE 7 : Interceptor


@Inherited @InterceptorBinding @Target({ElementType.TYPE, ElementType.METHOD}) @Reten@on([email protected]) public @interface MySimpleProlerInterceptor { }

1.

@InterceptorBinding


@Priority(Interceptor.Priority.APPLICATION + 10) @MySimpleProlerInterceptor // @Interceptor public class MyInterceptor { @AroundInvoke public Object calcExecTime (InvocaOonContext ic) throws Excep@on { // } }

2. Interceptor

Java EE 7 @Priority beans.xml


@AroundInvoke public Object calcExecTime (InvocaOonContext ic) throws ExcepOon { long start = System.currentTimeMillis(); // try { return ic.proceed(); // } catch (Excep@on e) { throw e; } nally { long end = System.currentTimeMillis(); // long Ome = end - start ; String className = ic.getTarget().getClass().getSuperclass().getName(); String methodName = ic.getMethod().getName() ; logger.log(Level.INFO, "{0}#{1} took {2} (ms)", new Object[]{ className, methodName, Ome }); } }


@MySimpleProlerInterceptor // public void executeSomeMethod() { // do Something }

3. Interceptor

: jp.co.oracle.cdis.HomePage#executeSomeMethod took 300 (ms)

or


A B C D E

@MyInteceptor @MyInteceptor @MyInteceptor @MyInteceptor @MyInteceptor

Interceptor :



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EJB JSR-345


DB

Queue


#:

Bean Validation


public class Person { private String name; private String jpZipCode; public String doSomething() { if (name == null || name.equals("")) { validaOonFailed();}; if (jpZipCode == null || jpZipCode.equals("")) { validaOonFailed();}; Pajern pajern = Pajern.compile("^\\d{3}-\\d{4}$"); Matcher matcher = pajern.matcher(jpZipCode); if (!matcher.nd()){validaOonFailed();} // }}


public class Person { private String name; private String jpZipCode; public String doSomething() { if (name == null || name.equals("")) { validaOonFailed();}; if (jpZipCode == null || jpZipCode.equals("")) { validaOonFailed();}; Pajern pajern = Pajern.compile("^\\d{3}-\\d{4}$"); Matcher matcher = pajern.matcher(jpZipCode); if (!matcher.nd()){validaOonFailed();} // } }

52


public class Person { @NotNull @Size(min=1) private String name; @NotNull @Size(min=8,max=8) @Pajern("^\\d{3}-\\d{4}$") private String jpZipCode; public String doSomething() { //

Bean Validation



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EJB JSR-345


DB

Queue

new? Factory?

?


@Inject @Qualier @Named @Scope @Singleton

javax.inject

EE

JSR-330 : Dependency Injection for Java


#

Dependency Injection


public class PersonDAOFromCSV implements PersonDAO { public List getPersons() throws IOExcepOon{ FileSystem fs = FileSystems.getDefault(); Path le = fs.getPath("/tmp/listPerson.csv"); return Files.newBueredReader(le).lines().map(str -> { String[] array = str.split(","); Person person = new Person(); person.setName(array[0]); person.setAge(Integer.parseInt(array[1])); return person; }).collect(Collectors.toList()); } }

CSV List

CSV


public class PersonController { public void listPersonName() throws IOExcep@on { // Person DAO PersonDAO personDAO = new PersonDAOFromCSV(); List persons = personDAO.getPersons(); persons.forEach(person -> System.out.println(person.getName())); } }

newFactoryAbstract FactoryService Locator

DB


public class PersonController {

@Inject PersonDAO personDAO ; // public void listPersonName() throws IOExcep@on { List persons = personDAO.getPersons(); persons.forEach(person -> System.out.println(person.getName())); } }

new -> Factory -> Abstract Factory -> Service Locator

,, !!


PersonController PersonDAO

PersonDAO

DI

PersonDAO new PersonDAO()

dao.getPersons()

PersonController @Inject PersonDAO

dao.getPersons()

PersonDAO

PersonDAO PersonDAO

new @Inject


#



public interface Service { public void doSomething (); }

public class DukeService implements Service { @Override public void doSomething () { // System.out.println(Duke Service); } }

public class DuchessService implements Service { @Override public void doSomething () { // System.out.println(Duchess Service); } }


public class Foo { @Inject private Service service; public void execService(){ service.doSomething(); } }

OR ???


@Inject @DukeQualier Service service1; public void execMul@pleService(){ service1.doSomething(); }

@Inject @DuchessQualier Service service2; public void execMul@pleService(){ service2.doSomething(); }

(Qualier)


(@Qualier)

Qualier

Qualier :


@Dependent @Qualier @Reten@on([email protected]) @Target({ElementType.FIELD, ElementType.TYPE, ElementType.METHOD, ElementType.PARAMETER}) public @interface DukeQualier {}

(@Qualier)


@DukeQualier public class DukeServiceImpl implements Service { @Override public void doSomething() { System.out.println("Duke Service"); } }


@Inject @DukeQualier Service service1; public void execMul@pleService(){ service1.doSomething(); }

Qualier


(Qualier) /

com.yoshio3.qualiers.* @DukeQualier, @DatabaseQualier

Qualier


# ()




@DukeQualier public class DukeService implements Service{ @Override public void doSomething () { // System.out.println(Duke Service); } }

@Dependent @Qualier @Reten@on([email protected]) @Target({ElementType.FIELD,

ElementType.TYPE, ElementType.METHOD, ElementType.PARAMETER})

public @interface DukeQualier { }

Duke

: @Qualier


Duke


public class Foo { @Inject @DukeQualier private nal Service service; public void execService(){ service.doSomething(); } }

nal


@Dependent public class Foo { private nal Service service; @Inject public Foo(@DukeQualier Service service) { this.service = service; } public void execService(){ service.doSomething(); }}

nal


#




@Duke@Duchess

@Printer @IoT@MyEnterprise

@Hoge@Foo @Bar@Oracle@MySQL

@GlassFish

?!


?!



@Named(value=duke) public class DukeService implements Service{ @Override public void doSomething () { // System.out.println(Duke Service); } }

OK !!

@Named




@Inject @Named(value=duke) Service service1; public void execMul@pleService(){ service1.doSomething(); }

!!


!!




@Inject @Named(value=duke) Service service1; public void execMul@pleService(){ service1.doSomething(); }

(Weld)


DI CDI


JSF(EL ) DI



@torazuka




EJB JSR-345


97

@Resource DI/CDI

EJB

@Inject

@EJBManaged Bean

Java EE


EJBCDI

16:15- 17:05

CDI EJB (Out of Scope)


javax.decorator javax.enterprise.context javax.enterprise.event javax.enterprise.inject javax.enterprise.uOl

JSR-346 : Contexts and Dependency Injection for Java EE 1.2


CDI Managed Bean

Java EE

EL

Observer

Java EE CDI


Contexts&Dependency Injection

#CDI CDI


Java EE 7

CDI Managed Bean


/WEB-INF/beans.xml

It is strongly recommended you use "annotated

(Java EE 6)


CDI Container Java Class

Java Class

Java Class

Java Class Java Class

Java Class

Java Class

Java Class

Java Class

Java Class

Java Class

CDI


CDI DI

106

CDI Managed Bean Bean @NormalScope

@ApplicaOonScoped @SessionScoped @ConversaOonScoped @RequestScoped ()

@Dependent ( ) @Interceptor @Decorator @Stereotype

UnsaOsed dependencies for type NGClass with qualiers @Default


CDI Managed Bean ?

CDI Container

Contextual Reference

Proxy


@Inject Proxy

CDI Container


Proxy

@Inject SomeManagedBean bean;

bean Proxy


CDI Managed Bean (Proxy)

Qualiers (Set)

Scope Bean

Stereotypes (Set)

Type Bean (Set)

AlternaOve Bean Alternative

: @Named

CDI Managed Bean

javax.enterprise.inject.spi.Bean


Java EE / Web Container

CDI Container


CDI Managed Bean

Bean Proxy

UserTransacOon Principal Validator ValidatorFactory HjpServletRequest HjpSession ServletContext


#10



DI : javax.inject.Scope Singleton

CDI : javax.enterprise.context Dependent

CDI CDI : javax.enterprise.context. NormalScoped () ApplicationScoped SessionScoped RequestScoped ConversationScoped

JSF : javax.faces. view.ViewScoped ow.FlowScoped

113

Java EE


15:10- 16:00

CDI JSF


javax.inject.Singleton ?

javax.enterprise.context.ApplicaOonScoped ?

Java EE


@javax.inject.Singleton public class DukeCounter { private int counter; public int getCounter() { return counter++; } }

@Singleton Managed Bean

@javax.inject.Singleton


@javax.enterprise.context.ApplicaOonScoped public class DukeCounter implements Serializable { private int counter; public int getCounter() { return counter++; } }

ApplicationScoped !!

Java EE


javax.inject.Singlton

CDI Container



@SessionScoped // @ConversaOonScoped public class CounterHoldInSession implements Serializable{ @Inject DukeCounter singleton; }

Java EE 6 (Singleton & Serializable) Weld(CDI )

@Singleton


#11 :




public class DukeSvc implements Service { @Override public void doSomething () { // System.out.println(Duke Service); } }

DukeAlpha DukeBeta DukeProd


public interface DataAccessService { public List getData (); }

class implements DataAccessService { @Override public List getData () { // DB } }

class implements DataAccessService { @Override public List getData () { // DB } }


@Dependend @AlternaOve public class DukeAlpha implements Service{ }

@Dependend @AlternaOve public class DukeBeta implements Service{ }

@Alternative()

Alternative XML




annotated CDI @Dependent

@Alternative()




DukeBeta

beans.xml

(CDI 1.0)


@Dependend @AlternaOve @Priority(Interceptor. Priority.APPLICATION + 10) public class DukeAlpha implements Service{ }

@Dependend @AlternaOve @Priority(Interceptor. Priority.APPLICATION + 20) public class DukeBeta implements Service{ }

jar

(CDI 1.1)


@Inject Service service ; @Dependend @AlternaOve @Priority(Interceptor. Priority.APPLICATION + 20) public class DukeBeta implements Service{ }

DukeBeta

@Inject XML


!!


@Inject Service @DukeServiceQualier service ; @DukeServiceQualier public class DukeServiceWithQualier implements Service { }

@AlternaOve !!

(Qualier)


@Inject Service @DukeServiceQualier service ; @DukeServiceQualier @Specializes public class SpecializedDuke extends DukeServiceWithQualier { @Override public void doSomething() { } }

@Specialized (CDI 1.1)


#12 CDI Managed Bean



Oracle

MySQL

PostgreSQL

DB


@Stateless public class SomeLogic1 { PersitenceContext (unitName=ORACLE_PU) EnOtyManager em; @Override public void doSomething () { // System.out.println(Duke Service); } }

@Stateless public class SomeLogic2 { PersitenceContext (unitName=MYSQL_PU) EnOtyManager em; @Override public void doSomething () { // System.out.println(Duke Service); } } EJB EJB

: EJB + JPA


JPA


@Inject @DatabaseQualier(value= DatabaseList.Oracle) EnOtyManager em; @Inject @DatabaseQualier(value= DatabaseList.MySQL) EnOtyManager em;

@Produces


@Produces

(enum)

(Qualier)

@Produces

DB


(enum)

public enum DatabaseList { Oracle, MySQL, PostgreSQL

}


(Qualier)

@Dependent @Qualier @Reten@on([email protected]) @Target({ElementType.FIELD, ElementType.TYPE, ElementType.METHOD, ElementType.PARAMETER}) public @interface DatabaseQualier { DatabaseList value() default DatabaseList.Oracle ; }


@Produces !! @Dependent public class DatabaseProducer { @Produces @DatabaseQualier(value = DatabaseList.Oracle) @PersistenceContext(unitName = "ORACLE_PU") private En@tyManager emOracle ; @Produces @DatabaseQualier(value = DatabaseList.MySQL) @PersistenceContext(unitName = "MySQL_PU") private En@tyManager emMySQL; }

Oracle

MySQL

!! !!


DB @Dependent @TransacOonal public class SomeBusinessLogic { @Inject @DatabaseQualier(value= DatabaseList.MySQL) EnOtyManager em; public List getPersons(){ em.createQuery(..); } }

value Oracle


#14 :



@Named @RequestScope @SecurityChekIntercepter @LoggerIntercepter @TransacOonal public class IndexPage { @Override public void doSomething () { // System.out.println(Duke Service); }}

!! @Named @RequestScope @SecurityChekIntercepter @LoggerIntercepter

@TransacOonal public class

UserRegPage {

}

@Named @RequestScope @SecurityChekIntercepter @LoggerIntercepter


UserConrmPage {

}

@Named @RequestScope @SecurityChekIntercepter @LoggerIntercepter


UserComplPage {

}

!!


@MyReqestedScopeStereotype public class IndexPage { @Override public void doSomething () { // System.out.println(Duke Service); }}

@MyRequestedScopeStereotype

public class UserRegPage {

}


public class UserConrmPage {

}


public class UserComplPage {

}

Proj

@Stereotype


@Stereotype @Named @RequestScope @SecurityChekIntercepter @LoggerIntercepter @TransacOonal @Stereotype @Target(TYPE) @Reten@on(RUNTIME) public @interface MyReqestedScopeStereotype {}


@Named @RequestScope @SecurityChekIntercepter @LoggerIntercepter @TransacOonal public class IndexPage { @Override public void doSomething () { // System.out.println(Duke Service); }}

@MyReqestedScopeStereotype public class IndexPage { @Override public void doSomething () { // System.out.println(Duke Service); }}


@Stereotype : @Model @Named @ReauestScope public class IndexPage { @Override public void doSomething () { // System.out.println(Duke Service); }}

@javax.enterprise.inject.Model public class IndexPage { @Override public void doSomething () { // System.out.println(Duke Service); }}

Web @Named, @RequestedScope @Model


Stereotype Stereotype /

com.yoshio3.stereotypes.* @DukeStereotype, @DatabaseStereotype

Stereotype


#13 : Observer



Observer


@RequestScoped @Named(value = userReg") public class UserRegistra@onPage { @Inject Event mailEvent; // public void execUserRegistra@on() { // mailEvent.re(new Mail(mailaddredd, name, message)); }

CDI


@Applica@onScoped public class MailEventHandler { @Resource(name = "mail/MyMailSession") Session mailSession; public void receiveEvent(@Observes Mail mailEvent) { sendMessage(mailEvent); } }

CDI


!!


@Applica@onScoped public class MailEventHandler { @Resource(name = "mail/MyMailSession") Session mailSession; public void receiveEvent(@Observes Mail mailEvent) { sendMessage(mailEvent); // } }

NG

CDI


EJB JMS !! @Stateless public class MailEventDispatcherBean { @Inject Event mailEvent; // @Asynchronous public void produceEvent(nal Mail message) { // mailEvent.re(message); }


EJB JMS !! @javax.ejb.Singleton // javax.inject.Singleton EJB public class EventConsumer { @Asynchronous @Lock(LockType.READ) public void consumeEvent(@Observes Mail message) throws InterruptedExcep@on { // }


@RequestScoped @Named(value = userReg") public class UserRegistra@onPage { @EJB MailEventDispatcherBean dispather; public void execUserRegistra@on() { // dispather.produceEvent(new Mail(mailaddredd, name, message)); }

EJB JMS !!


CDI Event

CDI 2.0 Asynchronous (https://issues.jboss.org/browse/CDI-499)


@torazuka


: Managed Bean CDI EJB

DI/CDI, EJB

Managed Bean

Managed Bean


171

cdi essential recipes at java day tokyo 2015

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