Java EE 5, 6 et les EJBs 3.1

Transcription

1 Java EE 5, 6 et les EJBs 3.1 Antonio Goncalves Tours JUG le 11/06/08 1

2 Agenda Présentation Java EE 5 Java EE 5 vs J2EE 1.4 Java EE 6 EJB 3.1 Encore plus facile Nouvelles fonctionnalités Questions

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 Co-créateur du Paris JUG

5 Et vous? J2EE 1.4 Java EE 5 Spring / Hibernate / Struts Java EE 6

7 Historique de Java EE Facilité de développement (web) Services web Facilité de développement Java EE 5 Java EE 6 Application d entreprise Robustesse J2EE 1.4 J2EE 1.2 J2EE 1.3 Profiles Projet JPE Servlet JSP EJB JMS RMI/IIOP CMP Connecteur Services web Déploiement Annotations EJB 3 Persistance Services web EJB 3.1 JPA 2.0 Servlet 3 JSF 2.0 JAX-RS Mai 1998 Déc specs Sept specs Nov specs Mai specs 2009 ~27 specs

8 A propos de Java EE 5 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 Les grandes nouveautés 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 Application Deployment 1.2, Java EE Management 1.1

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(); 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> 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 {

13 Stateless EJB 3.0 public interface Hello { String sayhello() throws RemoteException; Date today() throws RemoteException; public class HelloBean implements Hello { public String sayhello() {return "Hello Petstore!"; public Date today() {return new Date();

14 Annotations des

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, setcle(cle); return null; CreateException { 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 public class Hello 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=' 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:wsdlport_ns='urn:helloservice/wsdl'> <port-component-name>helloservice</portcomponent-name> <wsdl-port>wsdlport_ns:helloserviceseiport</wsdl-port> <service-endpoint-interface> endpoint.helloservicesei</service-endpointinterface> <service-impl-bean> <servlet-link>wsservlet_helloservice</servletlink> </service-impl-bean> </port-component> </webservice-description> </webservices> <?xml version='1.0' encoding='utf-8'?> <configuration xmlns=' <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 public class Hello { public String sayhello(string param) { return Hello + param;

19 JAXB 1.0 Classe générée // See <a href=" // Any modifications to this file will be lost upon recompilation of the source schema. // Generated on: ?? 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\u "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) +"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 =, proporder = { x, Y = 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 + le descripteur de déploiement XML

22 Injection en Java EE public class MyEJB myds ) DataSource private HelloEJB helloejb;

23 Moins de lignes de code Adventure Builder J2EE classes, 3284 lignes de code Java EE 5 43 classes, 2777 lignes de code 36% de classes en moins RosterApp J2EE 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 Sun Java Studio Creator (JSF)

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 EJB 3 embeddable container

27 Le déploiement est facilité Descripteurs de déploiement optionnels (ejbjar.xml, application.xml) sauf web.xml, faces-config.xml Utilisation des annotations définir les composants (EJB, WebService ) ORM avec ) définir sécurité ) mode transactionnel (@TransactionAttribute) Pour les clients riches Java Web Start Application Client Container

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 pour les EJBs.ear pour les applications d entreprise

29 Packaging

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 2.1

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 JSF Managed Bean

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 Java EE 5 : rupture enterprise, pas web!

34 A propos de Java EE 6 Développé sous la JSR 316 Sortie Q (+ 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) JAX-RS 1.0: RESTful Web Services

35 ~27 specifications Contenu Java EE 6 Web : JSF 2.0, JSP 2.2, JSTL 1.2, Servlet 3.0, JAX- 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 Application Deployment 1.2, Java EE Management 1.1

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 MyApp, name= MyServlet ) public class SimpleSample 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 @ServletListener

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 Créer Lire Mise à jour Supprimer SQL INSERT SELECT UPDATE DELETE HTTP PUT GET POST DELETE

41 public class OrderResource 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 POJO

43 Web Beans 1.0 Composant Web Beans class Hello { public String say(string name) { return "hello " + name; JSF <h:commandbutton value="say Hello" action="#{hello.say"/>

44 Web Beans 1.0 Composant Web class Hello { public String say(string name) { return "hello " + name; JSF <h:commandbutton value="say Hello" action="#{hello.say"/>

46 Goals Easier to use New features EJB 3.1 EJB JSR 318 Shipped with Java EE 6 JSR 316 Started in August 2007 ~20 expert members : companies/individuals Early draft in February 2008 JPA has its own spec JSR 317

47 Still under work APIs might change Q Disclaimer

49 Local private Hello h;... public interface Hello { String public class HelloBean implements Hello { public String sayhello() { return "Hello Tours JUG!";

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 Remote interfaces are not optional!

51 Optional local private HelloBean h;... public class HelloBean { public String sayhello() { return "Hello Tours JUG";

52 Packaging in ear file

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 Packaging in war file

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 Full platform 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 JSR JMS 1.1 JAF 1.1 JavaMail 1.4 JSR-115 JSR-196 JSR JSR JAX-RPC1.1 JAXR 1.0

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 Hello h; Client outside a container 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!!!

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 public class CachingBean { private Map 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) synchronized keyword

63 Read-Only Singleton (with public class CachingBean { private Map public Map getcache() { return cache; public void addtocache(object key, Object val) { cache.put(key, val);

64 Read-Mostly Singleton public class CachingBean { private Map cache; public Map getcache() { return public void addtocache(object key, Object val) { cache.put(key, val);

65 syncronized 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 / Forces initialization at statup

67 public class CachingBean { private Map void init() { cache =...; public Map getcache() { return cache; public void addtocache(object key, Object val) { cache.put(key, val);

68 Timer Service Added in EJB 2.1 Didn't change in 3.0 Improved in 3.1 Timer Service Programmatic and Calendar based scheduling Cron-like syntax (but nicer)

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 public class wakeupbean TimerService timer; public void createwakeupcall() { // Every weekday at 9 ScheduleExpression expr = new ScheduleExpression(). dayofweek( Mon-Fri ).hour(9); void wakeup(timer t) {...

71 Automatic Timer public class wakeupbean 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 java.util.concurrent API

73 Asynchronous call returning public class OrderBean { public void createorder() { Order order = persistorder(); send (order) ; printorder(order); public Order persistorder() public void send (order order) public void printorder(order order) {...

74 Asynchronous call returning public class OrderBean { public void createorder() { Task task = new Task(...); Future<int> computetask = compute(task);... int result = public Future<int> send (task task) { int result =...; return new javax.ejb.asyncresult<int>(result);

76 Java EE 5 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 Références Java EE GlassFish Livre Java EE 5

78 Questions

79 Java EE 5, 6 et les EJBs 3.1 Antonio Goncalves