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DepartmentforEnvironmentandHeritage

ITApplicationArchitecturalFramework

NickSchultz

Tom Mittiga

May2002

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ChallengesintheDevelopmentofNewBusinessApplications

Quicklydevelopanddeploy- easilyrefineandenhance

Simplyandefficientlyintegratewithexisting

informationsystems Scaletomeetchangingdemands

Meetappropriatebusinessrequirementsofsecurityandaccountability

Reduceriskofobsolescenceasbusinessneedsevolveovertime

Flexibilitytointroducenewtechnology

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ArchitectureMotivation

Tomeetthesechallenges,anappropriateITarchitecturaldesigniscrucial.

Anarchitecture isthewayasystem(or

application)iscomposedandhowitscomponentsinterfacetoeachother.

Whiletherearemanywaysofdesigning

applications,havingacommonstandarddepartmentalapproachisrecommended.

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TheDEHStandardApplicationArchitecture

Enablesacommon approachtoapplicationdevelopment Enablesintegration ofapplications&integration ofinformation

- i.e.Services-based ratherthanisolatedapplications

Enablessharing andreuse - dothedifficultthingsonce

e.g.One security&accountingapproach;Notoneforeachapplication

Allowsfocusedskillsdevelopmentandtraining Bysupportingalimitedrangeofproductsandtechnologies

Enableseffectiveuseofoff-the-shelfsoftware productsandsoftwarecomponents

AllowsfortheefficientandeffectiveuseofasharedITinfrastructure

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ApplicationArchitectureLayers

Presentation

LayerAppServer

Platform

Services

Enterprise

InformationSystems

UserInterface- look&feel,presentationof

informatione.g.website

Applicationbusinesslogic

Databases,LegacySystems,

External(non-DEH)Systems

Security,Transactions,Web

Server,Administration,

Management,Legacy&B2B

Connectors,DatabaseConnectors

Common

Domain

ServicesThedomainobjectsthat

modelthebusiness

problemdomain

DomainModel

Layer

Application

LayerE-Commerce,

SpatialAccess,

MapServer,

Accounting,

Reporting

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KeyTechnologies

JavaProgrammingLanguage

Java2Platform,EnterpriseEdition(J2EE)

Component-basedarchitectureforenterpriseapplicationssupportedbyApplicationServerPlatform

WebDelivery JakartaStrutswebframework

(Future)webservices,wireless

IntegrationofMapping Multi-levelSecurity

E-Commerce

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KeySelectedProducts

ESRIArcIMS&ArcSDEMappingandSpatial

InformationDelivery

ApacheWebServer

JReportEntServerReportServer

iPlanetDirectoryServerSecurityInformationand

DirectoryServicesRepository

OracleServerRelationalDatabase

SunSolarisOperatingSystem

Borland JBuilder Enterprise

Edition

IntegratedDevelopment

Environment

BorlandApplicationServerJ2EEApplicationServer

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DEHMappingIntegrationService

BasedonESRIproducts:ArcIMS,ArcSDE DEHwebmappingframeworkseamlessly

integratedintostandardapplicationframework

Enablesfunctionalintegrationofmapsintowebapplications

Morefunctionalthanplainmapbrowsingenablestighterintegrationintoapplicationcontext

Highlydistributable lowoverheadtowebbrowser- Enablesdeploymentacrosslow-speedlines

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DEHStandardFacilitiesforE-Commerce

DEHdevelopedframeworkforintegratingE-Commerceintoapplications

BillingandPaymentofFinancialTransactions

PurchasingviaAccountorCreditcard

IntegrationwithMasterpieceAccountsReceivable

IntegrationwithBizgatepaymentgateway

Customerqueryingofpurchasehistory

AppropriatelevelsofSecurity Financialadministrationutility

AppropriatefacilitiesandproceduresforReconciliation

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DEHApplicationSecurityAdministration- Apsec

BorlandApplicationServersupportsJ2EEstandardAPIs

forSecurity

Transparenttoapplications,DEHApsecprovidesBASaccesstousername,passwordandgroupinformationinanLDAPRepository(iPlanetDirectoryServer)

AnadministrativetoolisprovidedtomanagetheuserandapplicationinformationintheLDAPrepository

Useraccesswithinanapplicationcanbemanagedvia

groupmembership. Userscanhavethesameusername/passwordacrossa

numberofapplications

Applicationownerscanappointtheirownuser

administrators

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WebTier

JakartaStruts- Servlets&JavaServer Pages

BorlandApplicationServer

OracleDBMS

StandardFacilitiesforE-Commerce

DomainModelLayer

EntityEnterpriseJavaBeans

BusinessLogic

SessionEnterpriseJavaBeans

MapServices- ArcIMS

Reporting- JReport

ApacheWebServer

Example

iPlanetDirectoryServer

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HowDEHStaffCanUsetheArchitecture

ItisrecommendedthatCorporateITiscontactedregardingthefollowing

adviceontechnologyandproductselections

adviceondesignanddevelopmentofprojects toreviewanyexternalconsultingordevelopment

services

Contacts: NickSchultz- TechnicalConsultant(Ph82049215)

Tom Mittiga - Manager,ITStrategy(Ph82049010)

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Summary

Therecommendedarchitectureandproductframeworkprovideasignificantyetevolutionary

stepinthedepartmentsapproachtoapplication

development. Theywillhelpinmeetingthechallengesin

applicationdevelopment,reducingthebusiness

risks,andthushelpprovideanefficientinformationinfrastructureforthedepartment.