Using Java in the Oracle Frameworks

8/14/2019 Using Java in the Oracle Frameworks

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Release 11 i WorkshopsDallas, TX Santa Clara, CA

Cincinnati, OH Denver, CO Atlanta, GADetroit, MI Las Vegas, NV

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Using Java in theUsing Java in theOracle FrameworksOracle Frameworks

Lance ReedyJava Architect


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22 2007 Solution Beacon, LLC. All Rights Reserved.

Are you an OAUG Member?Are you an OAUG Member?

Member Benefits include:Member Benefits include:uu AdvocacyAdvocacy opportunities to influence Oracle on product enhancements, usabiopportunities to influence Oracle on product enhancements, usabi lity,lity,

new features, Oracle support, pricing and qualitynew features, Oracle support, pricing and quality

uu KnowledgeKnowledge that showcases the latest trends and techniques used by industrythat showcases the latest trends and techniques used by industryleaders through our national and regional events and our publicaleaders through our national and regional events and our publica tions, such astions, such asOAUG Insight magazineOAUG Insight magazine

uu CommunicationCommunication with other OAUG members worldwide through participation inwith other OAUG members worldwide through participation inOAUG committees, leadership positions, interaction with Oracle COAUG committees, leadership positions, interaction with Oracle C orporation'sorporation'suser initiatives, frequent member surveys, and Oracle managementuser initiatives, frequent member surveys, and Oracle management briefingsbriefings

uu EducationEducation through the hundreds of careerthrough the hundreds of career --enhancing presentations in ourenhancing presentations in ourconference paper database archive, as well as discounts to confeconference paper database archive, as well as discounts to confe rences andrences andOracle educationOracle education

uu NetworkingNetworking with Oracle customers, industry experts, thirdwith Oracle customers, industry experts, third --party software firms,party software firms,and other Oracle Applications specialists through our Member Datand other Oracle Applications specialists through our Member Dat abase andabase andOnline Vendor DirectoryOnline Vendor Directory

Global Users. Global Solutions.Global Users. Global Solutions.


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AgendaAgenda

uu Explore the use ofExplore the use ofJava technologies inJava technologies in

ll OAFOAFll ADFADFll OC4JOC4J

uu WrapWrap --upup

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Relevant HistoryRelevant History

uu The move from native clients to web clientsThe move from native clients to web clientsll With the rise of the web browser, the vast majority ofWith the rise of the web browser, the vast majority of

codecode can reside on the server, and only the usercan reside on the server, and only the userinterface can exist on the clientinterface can exist on the client

uu The development of the Java 2 platformThe development of the Java 2 platformll A common language that can run on most flavors ofA common language that can run on most flavors of

UNIX as well as Win32UNIX as well as Win32

uu The development of new device platforms able toThe development of new device platforms able torun web browsersrun web browsersll Cell phone, PDA, bar code scanners,Cell phone, PDA, bar code scanners,


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Early StandardsEarly Standards

uu Server side languages includedServer side languages includedll CGICGI --BIN programmingBIN programming first generationfirst generationll ServletsServlets first generation of Javafirst generation of Javall JSPJSP second generation, complementary to Servletssecond generation, complementary to Servlets

uu HTML and JavaScript on the clientHTML and JavaScript on the client


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Java EditionsJava Editions

uu Java 2 Standard Edition (J2SE)Java 2 Standard Edition (J2SE)ll What we typically think of as Java on a serverWhat we typically think of as Java on a server

uuJava PlugJava Plug --ininll The J2SE environment that is designed specifically toThe J2SE environment that is designed specifically to

runrun inside inside a web browsera web browserll Not feature limited, but very ability limitedNot feature limited, but very ability limited

uuJava 2 Enterprise Edition (J2EE)Java 2 Enterprise Edition (J2EE)ll Designed to be a cross platform application serverDesigned to be a cross platform application serverll Sun provides the API specifications, and a referenceSun provides the API specifications, and a reference

implementation of themimplementation of them


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Adding JavaAdding Java

uu As a language Java has the flexibility of running on bothAs a language Java has the flexibility of running on bothsides of the client / server modelsides of the client / server model

uu Uses different programming models for each platformUses different programming models for each platform


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JInitiatorJInitiator New ClientNew Client

uu Is OracleIs Oracle s licensed JVMs licensed JVMuu Used on client platform to provide a consistentUsed on client platform to provide a consistent

environmentenvironmentuu Executes within the clientExecutes within the client s web browser to runs web browser to run

things like Forms based modules in Ethings like Forms based modules in E --BusinessBusinessSuite 11Suite 11 i i


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What is OAFWhat is OAF

uu Based on early web standards and technologiesBased on early web standards and technologiesuu An attempt to introduce abstraction into applicationAn attempt to introduce abstraction into application

designdesignll Separation of components into layersSeparation of components into layersll Connections only between adjoining layersConnections only between adjoining layers

uu By separating the display from the business logicBy separating the display from the business logic

change becomes easierchange becomes easieruu Mechanism for personalization, design pattern forMechanism for personalization, design pattern forextensionextension


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AbstractionAbstraction

uu The idea of breaking an algorithm into discreteThe idea of breaking an algorithm into discretelayers, each of which is opaquelayers, each of which is opaque

uu Common in Object Oriented programmingCommon in Object Oriented programminguu Simplifies code while complicating solutions?!Simplifies code while complicating solutions?!

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HTML User InterfaceHTML User Interface

uu Tags and propertiesTags and propertiesused can become tooused can become toocomplex andcomplex andinterdependent tointerdependent tomanage easilymanage easily

uu Dependent upon theDependent upon thebrowserbrowser ssinterpretation of theinterpretation of theHTML languageHTML language

 Ex a m p le t a b le < ta b le c e lls p a c in g = 1

< ca p t io n > Ta b le1 < /c a p t io n >< tr>< td > H o m e r< /t d >

< td > ce ll2 < /td >< /tr >< /t a b le >

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JSPJSP

uu A way to create HTMLA way to create HTMLwith programmaticwith programmaticcontent.content.

uu Embeds Java doeEmbeds Java doe((scriptletsscriptlets ) into HTML) into HTML

 A t a b le d ra w n v ia a J S P p a

 < t a b le c e lls p a c in g = 1

< c a p t io n > Ta b le 1 < /c a p t io n >< t r >< t d >< % = v is it o r. g e tN a m e ( ) % >

< /t d >< t d > ce ll2 < /t d> < /t r>< /t a b le >

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ServletServlet

uu Java code that produces HTML as itJava code that produces HTML as it s outputs outputuu Distributed as compiled Class filesDistributed as compiled Class files

p u b lic c la s s _ t e s t1 {p u b lic v o id _ js p S e rv ic e ( {

r e s p o n s e . s e t C o n t e n t Ty p e _ _ o js p _ s _ o u t .w rit e ( ) ;_ _ o js p _ s _ o u t . w rit e ( v is it o r . g e tn a m e ( ) ) ;


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MVC TechnologiesMVC Technologies

Servlet(s)

JavaBeans, EJB

JavaServer Pages

Each componentuses programmingconcepts andmodels best suited

for its demands


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MVC Declarative ProgrammingMVC Declarative Programming

View

Model

Controller


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Model DetailsModel Details

uu A Java class (commonly aA Java class (commonly aJavaBean) is used toJavaBean) is used torepresent a businessrepresent a businessentity that the applicationentity that the application

acts onacts on


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Controller DetailsController Details

Controller

uu A XML config fileA XML config fileis used to controlis used to controlbehavior of thebehavior of the

applicationapplicationuu A group of JavaA group of JavaClassesClassesimplement theimplement the

controllercontroller s APIs API


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MVC Declarative ProgrammingMVC Declarative Programming

View

uu Custom tags are usedCustom tags are usedin the JSP page toin the JSP page toreference datareference data

presented by, or sentpresented by, or sentto, the Model.to, the Model.


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PersonalizationsPersonalizations

uu Changes to page layout or content visibilityChanges to page layout or content visibilityuu Can be done by administrators or by end usersCan be done by administrators or by end usersuu

The personalizations are applied between theThe personalizations are applied between theHTML page being generated and it being sent toHTML page being generated and it being sent tothe clientthe client

uu Personalizations are stored via data, not codePersonalizations are stored via data, not code

changeschanges


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OAF Page RenderingOAF Page Rendering

uu A hierarchy of operations, many of which areA hierarchy of operations, many of which aredriven purely by datadriven purely by data


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What is ADFWhat is ADF

uu The next generation after OAFThe next generation after OAFuu Builds on OAF, addsBuilds on OAF, adds

ll More dynamic page refreshingMore dynamic page refreshingll Data BindingData Bindingll Ability to build content for limited devicesAbility to build content for limited devicesll JavaServer FacesJavaServer Faces

uuMoves further into the J2EE architectureMoves further into the J2EE architecture


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Standards Used by ADFStandards Used by ADF

uu MVC MVC

uu JSP, Servlets JSP, Servlets uu

JavaBeansJavaBeansuu Enterprise JavaBeansEnterprise JavaBeansuu JavaServer FacesJavaServer Faces


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uu JavaBeans conform to particular coding rulesJavaBeans conform to particular coding rulesll Beans have data fields, each field must be accessedBeans have data fields, each field must be accessed

via a Get or a Set methodvia a Get or a Set methodll

They can be loaded dynamicallyThey can be loaded dynamicallyuu They are used to store data that needs to beThey are used to store data that needs to be

used programmaticallyused programmatically

JavaBeans and EJBJavaBeans and EJB


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Enterprise JavaBeansEnterprise JavaBeans

uu EJB expands the idea of the basic JavaBeanEJB expands the idea of the basic JavaBeanll Persistence in a databasePersistence in a databasell Remote accessRemote access

uu Java carries the C/UNIX idea of RemoteJava carries the C/UNIX idea of RemoteProcedure Call forward in the form of RemoteProcedure Call forward in the form of RemoteMethod InvocationMethod Invocationll An EJB container must facilitate the use RMI toAn EJB container must facilitate the use RMI to

allow remote clientallow remote client s to access Enterprises to access EnterpriseJavaBeansJavaBeans


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Java / SQLJava / SQL

uu A queryA querymechanism mustmechanism mustexist to allowexist to allowobjects to beobjects to beretrieved from theretrieved from theDB as neededDB as needed

uu DatatypesDatatypes must bemust bemapped betweenmapped betweenlanguages:languages:ll StringString vsvs varcharvarcharll AddressAddress vsvs a tablea table


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Object PersistenceObject Persistence

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uu The desire in a J2EEThe desire in a J2EEenvironment is to preventenvironment is to preventapplication code fromapplication code frominteracting directly with theinteracting directly with the

DBDBuu This is achieved byThis is achieved byallowing the J2EEallowing the J2EEcontainer to access tocontainer to access to

common DB servicescommon DB services


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EJB 3.0 PersistenceEJB 3.0 Persistence

uu Based on annotationBased on annotationuu Uses a tool toUses a tool to

generate the codegenerate the code ssskeleton andskeleton andannotationsannotations

uu Uses other tools atUses other tools atcompile and runtimecompile and runtimeto turn the annotationsto turn the annotations

into actual codeinto actual code


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TopLink versus EJB 3.0TopLink versus EJB 3.0

uu TopLink is an established Oracle standardTopLink is an established Oracle standarduu EJB 3.0EJB 3.0 s Java Persistence API is an emergings Java Persistence API is an emerging

industry wide standardindustry wide standard ll Java Persistence API was added in latest J2EE specJava Persistence API was added in latest J2EE specll Can be used outside of EJB, by J2SE appsCan be used outside of EJB, by J2SE appsll Based on ideas submitted by various J2EE vendorsBased on ideas submitted by various J2EE vendors

including Oracleincluding Oracle


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JSF and ADF FacesJSF and ADF Faces

uu JavaServer faces simplifies the design ofJavaServer faces simplifies the design ofHTML UIHTML UIll By providing tags to represent common dataBy providing tags to represent common data

elementselementsll By providing components which can help toBy providing components which can help to

validate data as itvalidate data as it s being entereds being entered

uu ADF brings tags representing commonADF brings tags representing commonOracle UI elementsOracle UI elements


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ADF FacesADF Faces Declarative UIDeclarative UI

uu Extends theExtends theJSP concept toJSP concept toexpose Oracleexpose Oracle ssown UIXown UIXwidgetswidgets

uu Replaces evenReplaces evensimple HTMLsimple HTMLtags withtags withabstractabstractelementselements


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OC4JOC4J J2EE ServerJ2EE Server

uu J2EE defines a specification for the applicationsJ2EE defines a specification for the applicationsserverserver

uu Defines clear interfaces and mechanisms forDefines clear interfaces and mechanisms forinteracting with other infrastructure, such asinteracting with other infrastructure, such asIdentity Management (LDAP)Identity Management (LDAP)

uu Individual vendors then select portions of the specIndividual vendors then select portions of the specthat they will implementthat they will implement

uu Focuses on server side technologiesFocuses on server side technologies


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J2EE TechnologiesJ2EE Technologies

uu A rich suite of APIsA rich suite of APIsbuilt on a commonbuilt on a commoncorecore


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Development in J2EEDevelopment in J2EE

uu Java is rich with OpenSource solutionsJava is rich with OpenSource solutionsll J2EE app servers: JBoss, Tomcat,J2EE app servers: JBoss, Tomcat, GlassFishGlassFishll Developer tools: Eclipse, NetBeansDeveloper tools: Eclipse, NetBeansll Frameworks: Struts, Tapestry, TurbineFrameworks: Struts, Tapestry, Turbinell Persistence: Hibernate, OJBPersistence: Hibernate, OJB

uu Some of these are sold as commercial applicationsSome of these are sold as commercial applicationswith vendor support and consultingwith vendor support and consulting

uu None of the developers tools offer tight integrationNone of the developers tools offer tight integrationinto proprietary application serversinto proprietary application servers

uu Few of them offer a complete development solutionFew of them offer a complete development solution


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J2EE Application DeploymentJ2EE Application Deployment

uu J2EE applications are composed of a number ofJ2EE applications are composed of a number ofcomponentscomponentsll Classes, ServletsClasses, Servlets

ll HTML, JSP, and imagesHTML, JSP, and imagesll XML configuration filesXML configuration files

uu Logical groups of Classes become Jar filesLogical groups of Classes become Jar filesuu All content is organized into a specific directoryAll content is organized into a specific directory

structurestructureuu Results are combined into a special Jar fileResults are combined into a special Jar file


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Packed ContentsPacked Contents

/ / /META /META --INFINF

application.warapplication.war

application.xmlapplication.xml

the actual application!the actual application!


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The FutureThe Future

uu Driven by industry standardsDriven by industry standardsll Release of the Java EE 5 spec drives the use of EJBRelease of the Java EE 5 spec drives the use of EJBll J2EE is driving towards web services and SOAJ2EE is driving towards web services and SOA

uu Fusion makes the move to a SOA basedFusion makes the move to a SOA basedenvironmentenvironmentll Same Java syntax, new programming modelsSame Java syntax, new programming modelsll Event driven processingEvent driven processingll

Focus on business modeling and processesFocus on business modeling and processesll Distributed applications communicating via EnterpriseDistributed applications communicating via EnterpriseService Bus and Web ServicesService Bus and Web Services


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Past EnvironmentPast Environment

uu Components used in OAFComponents used in OAF


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Present EnvironmentPresent Environment

uu Components used in ADFComponents used in ADF


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Future StateFuture State

uu Components needed for SOA and web servicesComponents needed for SOA and web services


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J2EE in the ArchitectureJ2EE in the Architecture


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Using Java in the Oracle Frameworks

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