Java EE 5, 6 et les EJBs 3.1

(1)

1

Java EE 5, 6

et les EJBs 3.1

Antonio Goncalves

(2)

Agenda

• Présentation

• Java EE 5

• Java EE 5 vs J2EE 1.4

• Java EE 6

• EJB 3.1

– Encore plus facile

– Nouvelles fonctionnalités

(3)

Agenda

• Présentation

• Java EE 5

• Java EE 5 vs J2EE 1.4

• Java EE 6

• EJB 3.1

–

Encore plus facile

–

Nouvelles fonctionnalités

(4)

Antonio Goncalves

• Consultant /

Architecte

senior

• Spécialiste Java / Java EE

• Ancien de

BEA Systems

• Enseignant à l’université du

CNAM

• Expert Group

– JSR 316 (Java EE 6)

– JSR 317 (JPA 2.0)

– JSR 318 (EJB 3.1)

• Auteur Java EE 5

(5)

Et vous ?

• J2EE 1.4

• Java EE 5

• Spring / Hibernate / Struts

• Java EE 6

(6)

Agenda

• Présentation

• Java EE 5

• Java EE 5 vs J2EE 1.4

• Java EE 6

• EJB 3.1

–

Encore plus facile

–

Nouvelles fonctionnalités

(7)

Historique de Java EE

Projet JPE

Mai 1998

J2EE 1.2

Servlet

JSP

EJB

JMS

RMI/IIOP

Déc 1999

10 specs

J2EE 1.3

CMP

Connecteur

Sept 2001

13 specs

Robustesse

Application

d’entreprise

J2EE 1.4

Services web

Déploiement

Nov 2003

20 specs

Services web

Java EE 5

Annotations

EJB 3

Persistance

Services web

Mai 2006

23 specs

Facilité de

développement

Java EE 6

Profiles

EJB 3.1

JPA 2.0

Servlet 3

JSF 2.0

JAX-RS

2009

~

27 specs

Facilité de

développement

(web)

(8)

• Développé sous la JSR 244

• Sortie en Mai 2006 (+ GlassFish V1)

• Facilité de développement

– EoD (Ease of Development)

• Compatible avec J2EE 1.4

• Le meilleur des deux mondes

– Spécifications

– Inspiré de l'Open source

(9)

• Rupture

par rapport à J2EE 1.4

• Simplification des

EJB

et

WebServices

• Nouvelle API de persistance (

JPA

)

• Model de développement POJO

• Injection de dépendance

• Utilisation des

annotations

• Descripteurs XML optionnel

• Développement par exception

• Facilite les applications web avec

JSF

(10)

Contenu Java EE 5

• 23 specifications

– Web

:

JSF 1.2

, JSP 2.1, JSTL 1.2, Servlet 2.5

– Enterprise

: Common Annotations 1.0,

EJB 3.0

, JAF

1.1, JavaMail 1.4, JCA 1.5, JMS 1.1,

JPA 1.0

, JTA 1.1

– Web Services

: JAX-RPC 1.1, JAX-WS 2.0, JAXB 2.0,

SAAJ 1.0, StAX 1.0,

Web Services 1.2

, Web Services

Metadata 2.0

– Management & Security

: JACC 1.1, Java EE

(11)

Agenda

• Présentation

• Java EE 5

• Java EE 5 vs J2EE 1.4

• Java EE 6

• EJB 3.1

–

Encore plus facile

–

Nouvelles fonctionnalités

(12)

Stateless EJB 2.1

Home interface

public interface HelloHome extends EJBHome {

Hello create() throws RemoteException,

CreateException;

}

Interface locale

public interface Hello extends EJBObject {

String

sayHello()

throws RemoteException;

Date

today()

throws RemoteException;

}

EJB

public class HelloBean implements SessionBean {

public HelloBean() { }

public

String sayHello() {return "Hello Petstore !";}

public

Date today() {return new Date(); }

public void ejbCreate() throws CreateException { }

public void setSessionContext(

SessionContext sessionContext)

throws EJBException { }

public void ejbRemove() throws EJBException { }

public void ejbActivate() throws EJBException { }

public void ejbPassivate() throws EJBException { }

}

Descripteur

<ejb-jar>

<enterprise-beans>

<session>

<display-name>HelloSB</display-name>

<ejb-name>HelloBean</ejb-name>

<home>HelloHome</home>

<remote>Hello</remote>

<ejb-class>HelloBean</ejb-class>

<session-type>Stateless</session-type>

<transaction-type>Container</transaction-type>

</session>

<assembly-descriptor>

<container-transaction>

<method>

<ejb-name>HelloBean</ejb-name>

<method-name>*</method-name>

</method>

<trans-attribute>Required</trans-attribute>

</container-transaction>

</assembly-descriptor>

</enterprise-beans>

</ejb-jar>

(13)

Stateless EJB 3.0

Interface

@Remote

public interface Hello {

String

sayHello()

throws RemoteException;

Date

today()

throws RemoteException;

}

EJB

@Stateless

public class HelloBean implements Hello {

public

String sayHello() {return "Hello Petstore !";}

public

Date today() {return new Date(); }

(14)

Annotations des EJBs 3.0

• @Stateless, @Stateful, @MessageDriven

• @Local, @Remote.

• @PostConstruct, @PreDestroy,

@PrePassivate...

• @Ejb, @Resource, @WebServiceRef

• @TransactionAttribute(REQUIRED)

• @RolesAllowed, @PermitAll

(15)

Entity Bean CMP 2.1

Home interface

public interface HelloHome extends EJBHome {

Hello create(String cle) throws

RemoteException, CreateException;

Hello findByPrimaryKey(String cle) throws

RemoteException, FinderException;

}

Interface locale

public interface Hello extends EJBObject {

String

getCle()

throws RemoteException;

String

getValeur()

throws RemoteException;

void

setValeur(String valeur)

throws RemoteException;

}

EJB

public abstract class

HelloBean

implements EntityBean {

public abstract String

getCle()

throws RemoteException;

public abstract void

setCle(String cle)

throws RemoteException;

public abstract String

getValeur()

throws RemoteException;

public abstract void

setValeur(String valeur)

throws

RemoteException;

public String ejbCreate(String cle) throws RemoteException,

CreateException {

setCle(cle); return null;

}

public void ejbPostCreate(String cle) throws CreateException{ }

public void setEntityContext(EntityContext entityContext)

throws EJBException { }

public void unsetEntityContext() throws EJBException { }

public void ejbRemove() throws RemoveException, EJBException { }

public void ejbActivate() throws EJBException { }

public void ejbPassivate() throws EJBException { }

public void ejbLoad() throws EJBException { }

public void ejbStore() throws EJBException { }

}

Descripteur ejb-jar.xml

<ejb-jar>

<enterprise-beans>

<entity>

<display-name>HelloEB</display-name>

<ejb-name>HelloBean</ejb-name>

<home>HelloHome</home>

<remote>Hello</remote>

<ejb-class>HelloBean</ejb-class>

<persistence-type>Container</persistence-type>

<prim-key-class>java.lang.String</prim-key-class>

<reentrant>False</reentrant>

<cmp-version>2.x</cmp-version>

<abstract-schema-name>Hello</abstract-schema-name>;

<cmp-field>

<field-name>cle</field-name>

</cmp-field>

<cmp-field>

<field-name>valeur</field-name>

</cmp-field>

<primkey-field>cle</primkey-field>

</entity>

</enterprise-beans>

</ejb-jar>

Descripteur propriétaire

<jbosscmp-jdbc>

<defaults>

<datasource>java:/petstoreDS</datasource>

<datasource-mapping>mySQL</datasource-mapping>

</defaults>

<enterprise-beans>

<entity>

<ejb-name>HelloBean</ejb-name>

<table-name>HELLO_PETSTORE</table-name>

<cmp-field>

<field-name>cle</field-name>

<column-name>key</column-name>

<jdbc-type>VARCHAR</jdbc-type>

<sql-type>varchar(10)</sql-type>

</cmp-field>

<cmp-field>

<field-name>valeur</field-name>

<column-name>value</column-name>

<jdbc-type>VARCHAR</jdbc-type>

<sql-type>varchar(50)</sql-type>

</cmp-field>

</entity>

</enterprise-beans>

</jbosscmp-jdbc>

(16)

Entity JPA

POJO

@Entity

public class Hello {

@Id

private Long cle;

private String valeur;

public String

getCle()

{return cle;}

public String

getValeur()

{return valeur;}

public void

setValeur()

{this.valeur = valeur;}

}

(17)

Service Web J2EE 1.4

Service Web

public class HelloServiceImpl implements HelloServiceSEI {

public String

sayHello

(String param)

throws java.rmi.RemoteException {

return “Hello “ + param;

}

package endpoint;

import java.rmi.*;

public interface HelloServiceSEI extends java.rmi.Remote {

public String

sayHello

(String param)

throws java.rmi.RemoteException;

}

<?xml version='1.0' encoding='UTF-8' ?>

<webservices

xmlns='http://java.sun.com/xml/ns/j2ee'

version='1.1'>

<webservice-description>

<webservice-description-name>

HelloService</webservice-description-name>

<wsdl-file>

WEB-INF/wsdl/HelloService.wsdl</wsdl-file>

<jaxrpc-mapping-file>

WEB-INF/HelloService-mapping.xml

</jaxrpc-mapping-file>

<port-component

xmlns:wsdl-port_ns='urn:HelloService/wsdl'>

<port-component-name>HelloService</port-component-name>

<wsdl-port>wsdl-port_ns:HelloServiceSEIPort</wsdl-port>

<service-endpoint-interface>

endpoint.HelloServiceSEI</service-endpoint-interface>

<service-impl-bean>

<servlet-link>WSServlet_HelloService</servlet-link>

</service-impl-bean>

</port-component>

</webservice-description>

</webservices>

<?xml version='1.0' encoding='UTF-8' ?>

<configuration

xmlns='http://java.sun.com/xml/ns/jax-rpc/ri/config'>

<service name='HelloService'

targetNamespace='urn:HelloService/wsdl'

typeNamespace='urn:HelloService/types'

packageName='endpoint'>

<interface name='endpoint.HelloServiceSEI'

servantName='endpoint.HelloServiceImpl'>

</interface>

</service>

</configuration>

(18)

Service Web Java EE 5

package endpoint;

import javax.jws.WebService;

@WebService

public class Hello {

public String

sayHello

(String param) {

return “Hello “ + param;

}

(19)

JAXB 1.0

• Classe générée

// See <a href="http://java.sun.com/xml/jaxb">http://java.sun.com/xml/jaxb</a> // Any modifications to this file will be lost upon recompilation of the source schema. // Generated on: 2005.04.21 ?? 10:37:56 PDT //

package generated.impl;

public class PointTypeImpl implements generated.PointType, com.sun.xml.bind.JAXBObject, generated.impl.runtime.UnmarshallableObject, generated.impl.runtime.XMLSerializable, generated.impl.runtime.ValidatableObject {

protected boolean has_Y; protected float _Y; protected boolean has_X; protected float _X;

public final static java.lang.Class version = (generated.impl.JAXBVersion.class); private static com.sun.msv.grammar.Grammar schemaFragment; private final static java.lang.Class PRIMARY_INTERFACE_CLASS() { return (generated.PointType.class); } public float getY() { return _Y; } public void setY(float value) { _Y = value; has_Y = true; } public float getX() { return _X; } public void setX(float value) { _X = value; has_X = true; }

public generated.impl.runtime.UnmarshallingEventHandler createUnmarshaller(generated.impl.runtime.UnmarshallingContext context) { return new generated.impl.PointTypeImpl.Unmarshaller(context);

}

public void serializeBody(generated.impl.runtime.XMLSerializer context) throws org.xml.sax.SAXException { if (!has_Y) { context.reportError(com.sun.xml.bind.serializer.Util.createMissingObjectError(this, "Y")); } if (!has_X) { context.reportError(com.sun.xml.bind.serializer.Util.createMissingObjectError(this, "X")); } context.startElement("", "x"); context.endNamespaceDecls(); context.endAttributes(); try { context.text(javax.xml.bind.DatatypeConverter.printFloat(((float) _X)), "X"); } catch (java.lang.Exception e) { generated.impl.runtime.Util.handlePrintConversionException(this, e, context); } context.endElement(); context.startElement("", "y"); context.endNamespaceDecls(); context.endAttributes(); try {

context.text(javax.xml.bind.DatatypeConverter.printFloat(((float) _Y)), "Y"); } catch (java.lang.Exception e) { generated.impl.runtime.Util.handlePrintConversionException(this, e, context); } context.endElement(); }

public void serializeAttributes(generated.impl.runtime.XMLSerializer context) throws org.xml.sax.SAXException { if (!has_Y) { context.reportError(com.sun.xml.bind.serializer.Util.createMissingObjectError(this, "Y")); } if (!has_X) { context.reportError(com.sun.xml.bind.serializer.Util.createMissingObjectError(this, "X")); } }

public void serializeURIs(generated.impl.runtime.XMLSerializer context) throws org.xml.sax.SAXException { if (!has_Y) { context.reportError(com.sun.xml.bind.serializer.Util.createMissingObjectError(this, "Y")); } if (!has_X) { context.reportError(com.sun.xml.bind.serializer.Util.createMissingObjectError(this, "X")); } }

public java.lang.Class getPrimaryInterface() { return (generated.PointType.class); }

public com.sun.msv.verifier.DocumentDeclaration createRawValidator() { if (schemaFragment == null) { schemaFragment = com.sun.xml.bind.validator.SchemaDeserializer.deserialize(( "\u00ac\u00ed\u0000\u0005sr\u0000\u001fcom.sun.msv.grammar.SequenceExp\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0001\u0002\u0000\u0000xr\u0000\u001dcom.su" +"n.msv.grammar.BinaryExp\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0001\u0002\u0000\u0002L\u0000\u0004exp1t\u0000 Lcom/sun/msv/gra" +"mmar/Expression;L\u0000\u0004exp2q\u0000~\u0000\u0002xr\u0000\u001ecom.sun.msv.grammar.Expressi" +"on\u00f8\u0018\u0082\u00e8N5~O\u0002\u0000\u0002L\u0000\u0013epsilonReducibilityt\u0000\u0013Ljava/lang/Boolean;L\u0000\u000b" +"expandedExpq\u0000~\u0000\u0002xpppsr\u0000\'com.sun.msv.grammar.trex.ElementPatt" +"ern\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0001\u0002\u0000\u0001L\u0000\tnameClasst\u0000\u001fLcom/sun/msv/grammar/NameClass;" +"xr\u0000\u001ecom.sun.msv.grammar.ElementExp\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0001\u0002\u0000\u0002Z\u0000\u001aignoreUndecl" +"aredAttributesL\u0000\fcontentModelq\u0000~\u0000\u0002xq\u0000~\u0000\u0003pp\u0000sq\u0000~\u0000\u0000ppsr\u0000\u001bcom.s" +"un.msv.grammar.DataExp\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0001\u0002\u0000\u0003L\u0000\u0002dtt\u0000\u001fLorg/relaxng/dataty" +"pe/Datatype;L\u0000\u0006exceptq\u0000~\u0000\u0002L\u0000\u0004namet\u0000\u001dLcom/sun/msv/util/String" +"Pair;xq\u0000~\u0000\u0003ppsr\u0000\"com.sun.msv.datatype.xsd.FloatType\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0001\u0002" +"\u0000\u0000xr\u0000+com.sun.msv.datatype.xsd.FloatingNumberType\u00fc\u00e3\u00b6\u0087\u008c\u00a8|\u00e0\u0002\u0000\u0000" +"xr\u0000*com.sun.msv.datatype.xsd.BuiltinAtomicType\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0001\u0002\u0000\u0000xr\u0000" +"%com.sun.msv.datatype.xsd.ConcreteType\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0001\u0002\u0000\u0000xr\u0000\'com.sun" +".msv.datatype.xsd.XSDatatypeImpl\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0001\u0002\u0000\u0003L\u0000\fnamespaceUrit\u0000" +"\u0012Ljava/lang/String;L\u0000\btypeNameq\u0000~\u0000\u0014L\u0000\nwhiteSpacet\u0000.Lcom/sun/" +"msv/datatype/xsd/WhiteSpaceProcessor;xpt\u0000 http://www.w3.org/" +"2001/XMLSchemat\u0000\u0005floatsr\u00005com.sun.msv.datatype.xsd.WhiteSpac" +"eProcessor$Collapse\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0001\u0002\u0000\u0000xr\u0000,com.sun.msv.datatype.xsd.W" +"hiteSpaceProcessor\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0001\u0002\u0000\u0000xpsr\u00000com.sun.msv.grammar.Expre" +"ssion$NullSetExpression\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0001\u0002\u0000\u0000xq\u0000~\u0000\u0003ppsr\u0000\u001bcom.sun.msv.ut" +"il.StringPair\u00d0t\u001ejB\u008f\u008d\u00a0\u0002\u0000\u0002L\u0000\tlocalNameq\u0000~\u0000\u0014L\u0000\fnamespaceURIq\u0000~\u0000" +"\u0014xpq\u0000~\u0000\u0018q\u0000~\u0000\u0017sr\u0000\u001dcom.sun.msv.grammar.ChoiceExp\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0001\u0002\u0000\u0000xq\u0000" +"~\u0000\u0001ppsr\u0000 com.sun.msv.grammar.AttributeExp\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0001\u0002\u0000\u0002L\u0000\u0003expq\u0000" +"~\u0000\u0002L\u0000\005valuexp\u0000psq\u0000~\u0000\u000bppsr\u0000\"com.sun.msv.datatype.xsd.QnameType\u0000\u0000\u0000\u0000" +"\u0000\u0000\u0000\u0001\u0002\u0000\u0000xq\u0000~\u0000\u0011q\u0000~\u0000\u0017t\u0000\u0005QNameq\u0000~\u0000\u001bq\u0000~\u0000\u001dsq\u0000~\u0000\u001eq\u0000~\u0000)q\u0000~\u0000\u0017sr\u0000#com." +"sun.msv.grammar.SimpleNameClass\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0001\u0002\u0000\u0002L\u0000\tlocalNameq\u0000~\u0000\u0014L" +"\u0000\fnamespaceURIq\u0000~\u0000\u0014xr\u0000\u001dcom.sun.msv.grammar.NameClass\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0001" +"\u0002\u0000\u0000xpt\u0000\u0004typet\u0000)http://www.w3.org/2001/XMLSchema-instancesr\u00000" +"com.sun.msv.grammar.Expression$EpsilonExpression\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0001\u0002\u0000\u0000x" +"q\u0000~\u0000\u0003sq\u0000~\u0000$\u0001psq\u0000~\u0000+t\u0000\u0001xt\u0000\u0000sq\u0000~\u0000\u0006pp\u0000sq\u0000~\u0000\u0000ppq\u0000~\u0000\u000esq\u0000~\u0000 ppsq\u0000~" +"\u0000\"q\u0000~\u0000%pq\u0000~\u0000&q\u0000~\u0000-q\u0000~\u00001sq\u0000~\u0000+t\u0000\u0001yq\u0000~\u00005sr\u0000\"com.sun.msv.gramma" +"r.ExpressionPool\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0001\u0002\u0000\u0001L\u0000\bexpTablet\u0000/Lcom/sun/msv/gramma" +"r/ExpressionPool$ClosedHash;xpsr\u0000-com.sun.msv.grammar.Expres" +"sionPool$ClosedHash\u00d7j\u00d0N\u00ef\u00e8\u00ed\u001c\u0003\u0000\u0003I\u0000\u0005countB\u0000\rstreamVersionL\u0000\u0006par" +"entt\u0000$Lcom/sun/msv/grammar/ExpressionPool;xp\u0000\u0000\u0000\u0005\u0001pq\u0000~\u0000\u0005q\u0000~\u0000!" +"q\u0000~\u00008q\u0000~\u0000\nq\u0000~\u00007x")); }

return new com.sun.msv.verifier.regexp.REDocumentDeclaration(schemaFragment); }

public class Unmarshaller

extends generated.impl.runtime.AbstractUnmarshallingEventHandlerImpl {

public Unmarshaller(generated.impl.runtime.UnmarshallingContext context) { super(context, "---");

}

protected Unmarshaller(generated.impl.runtime.UnmarshallingContext context, int startState) { this(context);

state = startState; } public java.lang.Object owner() { return generated.impl.PointTypeImpl.this; }

public void enterElement(java.lang.String ___uri, java.lang.String ___local, java.lang.String ___qname, org.xml.sax.Attributes __atts) throws org.xml.sax.SAXException { int attIdx; outer: while (true) { switch (state) { case 3 : if (("y" == ___local)&&("" == ___uri)) { context.pushAttributes(__atts, true); state = 4; return ; } break; case 0 : if (("x" == ___local)&&("" == ___uri)) { context.pushAttributes(__atts, true); state = 1; return ; } break;

308 lignes pour

<point><x>1</x><y>2</y></point>

• 38 fichiers

• 219 Ko de code

(20)

JAXB 2.0

Classe générée

@XmlAccessorType

(FIELD)

@XmlType

(name = “”, propOrder = {“x”, “Y”})

@XmlRootElement

(name = “point”)

public class Point {

protected float x;

protected flota y;

public float getX() {

return x;

}

public void setX(float value) {

this.x = value;

}

public float getY() {

return y;

}

public void setY(float value) {

this.y = value;

}

62 lignes pour

<point><x>1</x><y>2</y></point>

• 2

fichiers

• 3 Ko de code

(21)

Lookup J2EE 1.4

public class MyEJB implements SessionBean {

private DataSource myDS;

public void ejbCreate() {

try {

InitialContext ctx = new InitialContext();

myDS = (DataSource)ctx.

lookup

(“myDS”);

} catch (NamingException ex) {

// Que faire

}

(22)

Injection en Java EE 5

@Stateless

public class MyEJB {

@Resource

(name=“myDs”) DataSource myDS;

@EJB

private HelloEJB helloEjb;

(23)

Moins de lignes de code

• Adventure Builder

– J2EE 1.4 – 67 classes, 3284 lignes de code

– Java EE 5 – 43 classes, 2777 lignes de code

– 36%

de classes en moins

• RosterApp

– J2EE 1.4 – 17 classes, 987 lignes de code

– Java EE 5 – 7 classes, 716 lignes de code

– J2EE 1.4 descripteurs XML– 9 fichiers, 792 lignes

– Java EE 5 descripteurs XML – 1 fichier, 5 lignes

– 58%

de classes en moins,

89%

de fichiers XML en

moins

(24)

IDEs pour Java EE 5

• NetBeans

• IntelliJ IDEA

• Eclipse

• JBuilder

• JDeveloper

• JBoss IDE

• BEA Workshop Studio

(25)

Les serveurs d’applications

• GlassFish & Sun Java System AppServer

• BEA's WebLogic Server 10

• TmaxSoft JEUS 6

• SAP Netweaver 7.1

• Oracle OC4J 11

• Apache Geronimo 2.0

• JOnAS 5.0

• Websphere 7

• JBoss 5.0 beta

(26)

Tests

• Pas de spécification

– JUnit

– HTTPUnit

– Canoo WebTest

– Mock

– …

• Plus facile à tester

– POJO

– JPA, moins besoin du conteneur (EntityManager)

– Ejb3Unit (out of container EJB 3.0 testing)

– JBoss et GlassFish V3

(27)

Le déploiement est facilité

• Descripteurs de déploiement optionnels

(ejb-jar.xml, application.xml)

– sauf web.xml, faces-config.xml

• Utilisation des annotations

– définir les composants (EJB, WebService…)

– ORM avec JPA (

@Entity, @Id, @Colmumn

…)

– définir sécurité (

@DenyAll, @PermitAll

…)

– mode transactionnel (

@TransactionAttribute

)

• Pour les clients riches

– Java Web Start

(28)

Packaging

• Conventions

–

.war

pour les applications web

–

.rar

pour les ressources

– Le répertoire

lib

contient les fichiers jar commun à

l’application (classpath automatique)

–

.jar

avec un attribut Main-Class pour les applications

clientes (

ACC

)

–

.jar

avec une classe annotée

@Stateless

pour les

EJBs

(29)

(30)

Compatibilité avec J2EE 1.4

• Compatibilité ascendante

assurée dans la

spécification

• EJB 3.0 peuvent être clients des EJB 2.1 (et

inversement

)

• JPQL peut être utilisé dans les méthodes

finder() des anciens EJB 2.1

• Compatibilité des EL ($, #) entre JSP et JSF

• JSP 2.0 s’exécutent dans un conteneur JSP

(31)

Les patterns ?

• DTO

– Les Entity JPA peuvent servir de DTO

• DAO

– EntityManager pour requêtes simples (CRUD)

– DAO générique

• Service Locator

– Injection, Application Client Container

• Delegate

– Injection

• Action Controller

(32)

Java EE 5 et Couche Web

• Pas autant d’améliorations que la couche EJB

– JSP 2.1, JSF 1.2, JSTL

• Problèmes maintenus

– Back-refresh du navigateur

– Double click, double thread

– Dialogues/flow => Application, Session, Request

=>

JBoss Seam

(future WebBeans avec Java EE 6)

• Utilisation d’autres frameworks

– Clay, Yahoo UI, Facelets, Seam, Shale, Ajax4JSF,

ICEFaces, Avatar

(33)

Agenda

• Présentation

• Java EE 5

• Java EE 5 vs J2EE 1.4

• Java EE 6

• EJB 3.1

–

Encore plus facile

–

Nouvelles fonctionnalités

(34)

A propos de Java EE 6

• Développé sous la JSR 316

• Sortie Q1 2009 (+ GlassFish V3)

• Utilisation de profiles

• Pruning

: suppression progressive

– EJB CMP => JPA

– JAX-RPC => JAX-WS

• Servlet 3.0

et

JSF 2.0

(annotations)

• WebBeans 1.0

(inspiré de JBoss Seam)

(35)

Contenu Java EE 6

• ~27 specifications

– Web

:

JSF 2.0

, JSP 2.2, JSTL 1.2,

Servlet

3.0, JAX-

3.0,

JAX-RS 1.0, Web Beans 1.0

RS 1.0, Web Beans 1.0

– Enterprise

: Common Annotations 1.0,

EJB 3.1

, JAF

1.1, JavaMail 1.4, JCA 1.5, JMS 1.1,

JPA 2.0

, JTA 1.1

– Web Services

: JAX-RPC 1.1, JAX-WS 2.0, JAXB 2.0,

SAAJ 1.0, StAX 1.0, Web Services 2.0, Web Services

Metadata 2.0

– Management & Security

: JACC 1.1, Java EE

(36)

Servlet 2.5

Servlet

public class SimpleSample extends

HttpServlet

{

public void doGet (HttpServletRequest req,

HttpServletResponse res){

}

web.xml

<web-app>

<servlet>

<servlet-name>

MyServlet

</servlet-name>

<servlet-class>samples.SimpleSample</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>MyServlet</servlet-name>

<url-pattern>/

MyApp

</url-pattern>

</servlet-mapping>

</web-app>

(37)

Servlet 3.0

@Servlet(urlMapping=”MyApp”, name=”MyServlet”)

public class SimpleSample {

@Get

public void handleGet(HttpServletRequest req,

HttpServletResponse res) {

}

(38)

Servlet 3.0

• Développé sous la JSR 315

• web.xml (optionel) modulaire

– Découpé en web-fragment

• Servlet asynchrone (style Comet)

• Programmation par exception

(39)

JSF 2.0

• Développé sous la JSR 314

• Inspiré par Facelet

• Facilite la création de composants graphiques

• Support d'Ajax

• Moins de configuration (faces-config.xml)

• Comet ?

(40)

REST

• REST

(REpresentational State Transfer)

– Architectures orientées ressource

– Tout est ressource

– Toute ressource est adressable par une URL

• Sémantique CRUD

– GET /articles/123

– DELETE /articles/123

HTTP

SQL

DELETE

Supprimer

POST

UPDATE

Mise à jour

GET

SELECT

Lire

PUT

INSERT

Créer

(41)

JAX-RS 1.0

@Remote

@Path

("orders/{order_id}")

public class OrderResource {

@Get

Order getOrder(

@PathParam

("order_id") String id) {

...

}

(42)

Web Beans 1.0

• Développé sous la JSR 299

• Inspiré de JBoss Seam

• Spec Lead : Gavin King

• Unifie la couche web et enterprise

– Glue entre composants (JSF et les EJBs)

– Contexte conversationel

• Un composant Web Beans peut être :

– EJB

– Managed Bean JSF

– Entity JPA

(43)

Web Beans 1.0

Composant Web Beans

public

@Component

class Hello {

public String say(String name) {

return "hello " + name;

}

JSF

<h:commandButton value="Say Hello"

(44)

Web Beans 1.0

Composant Web Beans

@Stateless

public

@Component

class Hello {

public String say(String name) {

return "hello " + name;

}

JSF

<h:commandButton value="Say Hello"

(45)

Agenda

• Présentation

• Java EE 5

• Java EE 5 vs J2EE 1.4

• Java EE 6

• EJB 3.1

–

Encore plus facile

–

Nouvelles fonctionnalités

(46)

EJB 3.1

• Goals

– Easier to use

– New features

• EJB 3.1 - JSR 318

– Shipped with Java EE 6 – JSR 316

– Started in August 2007

– ~20 expert members : companies/individuals

– Early draft in February 2008

(47)

Disclaimer

• Still under work

• APIs might change

• Q1 2009

(48)

Agenda

• Présentation

• Java EE 5

• Java EE 5 vs J2EE 1.4

• Java EE 6

• EJB 3.1

–

Encore plus facile

–

Nouvelles fonctionnalités

(49)

Local interface

@Stateless

public class HelloBean implements

Hello

{

public String sayHello() {

return "Hello Tours JUG !";

}

@Local

public interface

Hello

{

String sayHello();

}

@EJB

private

Hello

h;

...

h.sayHello();

(50)

Optional local interface

• Interfaces are not always needed

• “no-interface” view

– Just the bean

– All methods are exposed

– Client injection still needed

– All container services still available

(51)

Optional local interface

@Stateless

public class HelloBean {

public String sayHello() {

return "Hello Tours JUG";

}

@EJB

private

HelloBean

h;

...

h.sayHello();

(52)

(53)

Packaging

• EJB ==

.ear

• lib

directory has simplified deployment

• But

ear

file is still needed to deploy an EJB

• Even for a simple web application

=> Deploy an EJB 3.1 in a

_war

file

• Keeping all EJBs functionalities

(54)

(55)

Java EE 6 profiles

• Still in discussion !!!

Web

Servlet 3.0

JSP 2.2

JSR-45

EL 1.2

JSTL 1.2

JSR-250

Web Dev

Servlet 3.0

JSP 2.2

JSR-45

EL 1.2

JSTL 1.2

JSR-250

EJB 3.1 (Lite)

JTA 1.1

JPA 2.0

JSF 2.0

Web Beans 1.0

Servlet 3.0

JSP 2.2

JSR-45

EL 1.2

JSTL 1.2

JSR-250

EJB 3.1

JTA 1.1

JPA 2.0

JSF 2.0

Web Beans 1.0

JAX-RS 1.0

Connectors 1.6

JAX-WS 2.2

JAXB 2.2

JSR-109 1.2

JSR-181 1.1

JMS 1.1

JAF 1.1

JavaMail 1.4

JSR-115

JSR-196

JSR-88 1.2

JSR-77 1.1

JAX-RPC1.1

JAXR 1.0

Full platform

(56)

EJB « lite »

• Subset of the EJB 3.1 API

• To be used in Web profile

Local Session Bean

Annotations

Injection

CMT / BMT

Interceptors

Security

Message Driven Beans

EJB Web Service Endpoint

RMI/IIOP Interoperability

Remote interface

EJB 2.x

Timer service

CMP / BMP

(57)

Global JNDI names

• Client inside a container

• Client outside a container

@EJB

Hello h;

Context ctx = new InitialContext();

Hello h = (Hello) ctx.lookup(

???

);

(58)

Global JNDI names

• Not defined in Java EE

• Vendor specific

– Not portable

• No standard syntax

• mappedName

is a partial solution

• Global JNDI names are not just for EJBs

(datasource, connection factories, queues...)

• Work in progress !!!

(59)

Agenda

• Présentation

• Java EE 5

• Java EE 5 vs J2EE 1.4

• Java EE 6

• EJB 3.1

–

Encore plus facile

–

Nouvelles fonctionnalités

(60)

Singleton

• New session bean component

– Looks like a stateless / stateful

– “no interface” view/local/remote interface

• One single EJB per application per JVM

• Use to share state in the entire application

• State not preserved after container shutdown

• Container initialization startup

(61)

Singleton

@Singleton

public class CachingBean {

private Map cache;

@PostConstruct void init() {

cache = ...;

}

public Map getCache() {

return cache;

}

public void addToCache(Object key, Object val) {

cache.put(key, val);

}

(62)

Singleton and concurrency

• Single thread (default) too restrictive

– One instance / Multiple threads

• CMC (Container Managed Concurrency)

– Concurrency through annotations

– Exclusive / shared lock

– Timeout

• BMC (Bean Managed Concurrency)

(63)

Read-Only Singleton (with CMC)

@Singleton

public class CachingBean {

private Map cache;

@ReadOnly

public Map getCache() {

return cache;

}

public void addToCache(Object key, Object val) {

cache.put(key, val);

}

(64)

Read-Mostly Singleton (with CMC)

@Singleton

@ReadOnly

public class CachingBean {

private Map cache;

public Map getCache() {

return cache;

}

@ReadWrite

public void addToCache(Object key, Object val) {

cache.put(key, val);

}

(65)

syncronized Singleton (BMC)

@Singleton

@BeanManagedConcurrency

public class CachingBean {

private Map cache;

public Map getCache() {

return cache;

}

synchronized

public void addToCache(Object key,

Object val){

cache.put(key, val);

}

(66)

Singleton Startup

• Richer lifecycle

– Container initialization

– Container shutdown

• Same callback annotations

– @PostConstruct / @PreDestroy

• @Startup

(67)

Singleton Startup

@Singleton

@Startup

public class CachingBean {

private Map cache;

@PostConstruct

void init() {

cache = ...;

}

public Map getCache() {

return cache;

}

public void addToCache(Object key, Object val) {

cache.put(key, val);

}

(68)

Timer Service

• Timer Service

– Added in EJB 2.1

– Didn't change in 3.0

– Improved in 3.1

• Programmatic and Calendar based scheduling

(69)

Timer Service

• « Last day of the month »

• « Every Friday at 4pm »

• « Every five minutes on Monday and

Thursday »

• Cron syntax

– second [0..59], minute [0..59], hour [0..23], year

– DayOfMonth [0..31]

– DayOfWeek [0..7] or [sun, mon, tue..]

– Month [1..12] or [jan,feb..]

(70)

Programmatic Timer Creation

@Stateless

public class wakeUpBean {

@Resource TimerService

timer

;

public void createWakeUpCall() {

// Every weekday at 9

ScheduleExpression expr = new ScheduleExpression().

dayOfWeek(“Mon-Fri”).hour(9);

timer.createTimer(expr);

}

@Timeout

void wakeUp(Timer t) {

...

}

(71)

Automatic Timer Creation

@Stateless

public class wakeUpBean {

@Schedule(dayOfWeek=“Mon-Fri”, hour=“9”)

void wakeUp() {

...

}

(72)

Asynchronous call

• How to have asynchronous call in EJBs ?

• JMS is to send messages not to do

asynchronous calls

• Threads are not allowed (don't integrate well)

• New model

– Annotations

(73)

Asynchronous call returning void

@Stateless

public class OrderBean {

public void createOrder() {

Order order = persistOrder();

sendEmail(order) ;

printOrder(order);

}

public Order persistOrder() {...}

@Asynchronous

public void sendEmail(Order order) {...}

@Asynchronous

public void printOrder(Order order) {...}

}

(74)

Asynchronous call returning value

@Stateless

public class OrderBean {

public void createOrder() {

Task task = new Task(...);

Future<int> computeTask

= compute(task);

...

int result =

computeTask.get()

;

}

@Asynchronous

public

Future<int>

sendEmail(Task task) {

int result = ...;

return new

javax.ejb.AsyncResult<int>(result)

;

}

(75)

Agenda

• Présentation

• Java EE 5

• Java EE 5 vs J2EE 1.4

• Java EE 6

• EJB 3.1

–

Encore plus facile

–

Nouvelles fonctionnalités

(76)

• Couvre

– EJB Stateless, Stateful, MDB (JMS)

– JPA

– JSF

– WebServices

– Glassfish installation & configuration

– …

• Pour les développeurs et architectes

• Inspiré du PetStore de Sun

• 10 chapitres, développement incrémental

(77)

• Java EE 5

– http://java.sun.com/javaee/

– http://java.sun.com/javaee/5/docs/tutorial/doc/

• GlassFish

– https://glassfish.dev.java.net/

– http://www.glassfishwiki.org/

• Livre Java EE 5

– http://www.eyrolles.com/

– http://www.antoniogoncalves.org

Références

(78)

(79)

Java EE 5, 6

et les EJBs 3.1