Understanding SOA -Service Oriented Architectures

Lauren FareseSenior Technical ManagerOracle Corporation

“This presentation is for informational purposes only and may not be incorporated into a contract or agreement.”

Agenda

• Distributed Computing• Service Delivery Platform• Service Oriented Architecture (SOA)

• Benefits• Oracle Fusion Middleware

Phase IPhase IDownsizeDownsize

• Client/ServerClient/Server• DCE DCE

Phase IIPhase IIComponentsComponents

• CORBACORBA• DCOMDCOM• EJBEJB

Phase IIIPhase IIIMessagingMessaging

• MOMMOM

History of Distributed ComputingHistory of Distributed Computing

Distributed Computing and Software Architecture Evolution

Grid Computing

Service Computing

Multi-Tier

Client-Server

Remote Access

Host-Based Structured

Component-Based

Object-Oriented

Web Services

Time Tim

e

Grid and Services Convergence

Grid and Services Convergence

Issues with Existing Models

• Proprietary protocols• Interoperability• Platform lock-in

• Inflexible

What is Service Computing? • Providing technical solutions to the business that are

derived directly from the business processes they support.

• Decomposing business processes into discrete business services used to produce IT-enabled business processes for internal and external consumption.

• Systematically creating new services by rewiring and integrating existing services and business processes.

Why Service Computing?

Accelerate Response to Changing Conditions

Increase Visibility Into Operations

Maximize Investments - Reuse Existing IT Assets

Align Functional and IT Focus Around Functional Priorities

Non-Service Computing Application Environment

Application-1

Application-2

Application-3

Messaging

Manual

Batch

Silo Everything

User Interface

User Interface

User Interface

Server

Server

Server

Storage

Storage

Storage

• No shared user–interface

• No shared business rules

• No shared data models

• No shared storage

• No shared hardware server

• No shared database

Manual, Batch, or Point-to-Point Messaging Integration

Service Computing Application Environment

Shared StorageShared Servers

Shared Business ServicesEnterprise-Organization-

Departmental Portal

Virtualized Everything• Shared Software Services Support Business Services

• Applications Defined by Collaboration of Services and Composite Services

• Shared Business Rules within Services

• Shared data models

• Enterprise Portal Provides Access to Services

• Shared Server and Storage for Increased Scalability and Availability

• Shared, Clustered database

Services Provide Integration

What is SOA ?

• Evolution of distributed computing• Application functions are modularized and

presented as services• IT architecture for synchronous and

asynchronous applications• Services are loosely coupled

• Service interface is independent of the implementation

Why SOA ? – The Cruel Reality

ScreenScrape

ScreenScrape

ScreenScrape

ScreenScrape

MessageQueue

MessageQueue

MessageQueue

DownloadFile

DownloadFile

DownloadFile

TransactionFile

TransactionFile

TransactionFile

ORB

ORB

CICS Gateway

CICS Gateway

APPC

APPCRPC

RPC

TransactionFile

Sockets

Sockets

Message

Message

Application

Application

Application

Application

Application

Application

Application

Application

Application

Application

Source: Gartner

Why SOA ? - The Reality of Modern Business

• Geographic, Departmental Evolution

• Mergers & Acquisitions (M & A)

• Compliance issues• Difficult to Answer Simple

Questions• Costly to Operate• Inflexible

Difficult to achieve benefits of an Information-Driven Enterprise

E-Business Suite

Siebel

LegacySAP

Web Services

Suppliers

PeopleSoft

BusinessIntelligence

Why SOA : Monolithic ApplicationsInflexible, Inefficient, Hard to Maintain

Print InvoicesPrint Invoices

Generate POsGenerate POs

Credit Credit Verification 1Verification 1

User User Authentication 1Authentication 1

Account Account Validation 1Validation 1

Create Create CustomersCustomers

Credit Credit Verification 2Verification 2

User User Authentication 2Authentication 2

Account Account Validation 2Validation 2

•Hard to adapt to changing business requirements

•Duplication of functionality means wasted resources

•Small fixes require large investments of time and labor

Why You Care? Re-Developing Applications is Expensive, Orchestration is Not

Application Components Known as Services

BuzzJ2EE, Web Services,Service Enablement

Ability to Orchestrate ServicesInto Composite Applications

BuzzComposite Applications,

Orchestration, ESB, BPEL

SOA Platform toDesign, Build, Integrate,Deploy, Secure, Manage

AS 10g

SOA: Service Oriented Architecture

OracleOracleFinancialsFinancials

Standard InterfaceStandard Interface

Custom OrderCustom OrderApplicationApplication

Standard InterfaceStandard Interface

New WebNew Web ApplicationApplication

Standard InterfaceStandard Interface

SiebelSiebelCRMCRM

Standard InterfaceStandard Interface

Mainframe HRMainframe HRApplicationApplication

Standard InterfaceStandard Interface

.NET Inventory.NET InventoryApplicationApplication

Standard InterfaceStandard Interface

New Supply Chain Management ApplicationNew Supply Chain Management Application(Business Process or Composite Application)(Business Process or Composite Application)

Benefits of SOA

• Respond to business changes• Address new needs with existing applications• Unlock existing application investments• Support new channels & complex interactions• Support organic business

Anatomy of a Service

Service ConsumerService Consumer

Interface ProxyInterface Proxy

ServiceServiceInterfaceInterface

ServiceServiceImplementationImplementation

New ServiceNew Service

WrappedWrappedLegacyLegacy

CompositeCompositeServiceService

Service Oriented Architecture

MonolithicApplications

ServicesCheck

InventoryCustomer

Update

EmployeeRecord

Database

J2EE App

ERP

Legacy

CheckAvailability

Service Delivery Platform - Standards

SOA ToolsApp Dev Framework

SOAP, WSDL, UDDISOAP, WSDL, UDDI

WS-I Basic ProfileWS-I Basic Profile

Web Service PolicyWeb Service Policy

Web Service TransactionsWeb Service Transactions

Web Service Reliable MessagingWeb Service Reliable Messaging

J2EE 1.4/ .Net/ ……..J2EE 1.4/ .Net/ ……..

Web Service SecurityWeb Service Security

Web Service OrchestrationWeb Service Orchestration

Web Service Distributed ManagementWeb Service Distributed Management

Web Service CoordinationWeb Service Coordination

Web Service Choreography Web Service Choreography TPM, Mainframe,

Legacy Sys

Applications

Databases

B2B PartnersMiddleware (Oracle Fusion Middleware)Middleware (Oracle Fusion Middleware)

WSDL

Web Service(J2EE, PL/SQL,

.NET,C/C++,Legacy …)

Web ServiceClient

(J2EE, .NET,PL/SQL …)

Points to description

DescribesService

FindsService

Invokes withXML Messages

SOAP, WSDL, UDDI

SOAP

UDDI Registry

Points to service

Interoperability of Web Services

• Web Services Interoperability• Develops profiles• Suggests best practices• Provides testing tools

• Runtime and tools uptake • Oracle JDeveloper analysis• OracleAS compliance

J2EE 1.4 - Web Services

DescriptionJava APIsfor XML

Java API for XML Registries

Java API for XML Remote Procedure CallJAX-RPC

SAAJ

Java API for XML Data Binding

SOAP API for Attachments in Java

JAXP

JAXB

JAXR

Java API for XML Parsing

Stateless Session EJB Endpoint ModelEJB 2.1

Web Services Deployment ModelJSR 109

Web Services Reliability

ApplicationLayer

SOAP NodeWith

Reliable Messaging

ApplicationLayer

SOAP NodeWith

Reliable Messaging

Msg

Ack

Sender Receiver

• At least once semantics• At most once semantics

• Guaranteed message ordering • Exactly once semantics

Web Services Security

ClientWS-Security

JAX-RPC Service Endpoint

JAX-RPC Client

TransportHTTP, JMS

SOAPMessage

SOAPMessage

SOAPMessage

SOAPMessage

ServerWS-Security

Add AuthToken

EncryptSign

DecryptCheck

Signature

Check Signature

DecryptChck Auth

Token

SignEncrypt

• Authentication• User name/password token• X.509 token

• XML Digital Signatures• XML Encryption

Response

Request

Web Services Orchestration

BPELBPEL

Credit RatingCredit Rating

WSDLWSDL

Service BusService Bus

Star LoanStar Loan

Loan EntryLoan Entry United LoanUnited Loan

AADDAAPPTTEERR

AADDAAPPTTEERR

WWSSDDLL

FulfillmentFulfillment

AADDAAPPTTEERR

Application ServerApplication Server

Web Services Management

Web ServicesClient Management

JAX-RPC Service Endpoint

JAX-RPC Client

TransportHTTP, JMS

SOAPMessage

SOAPMessage

SOAPMessage

SOAPMessage

Web ServicesServer Management

WS-Security

WS-Reliability

Auditing/Logging

WS-Reliability

Auditing/Logging

WS-Security

Auditing/Logging

WS-Reliability

WS-Security

Auditing/Logging

WS-Reliability

WS-Security

Web Services Management• Managing and deploying operational policies

across applications and Web services• Layer best-practice security and management

across all services

• No modifications to applications or services• Support WS-* standards

• Can secure/manage Web services implemented in heterogeneous languages and environments

Web Services ManagementBUILDPolicies

ENFORCEPolicies

MONITORPolicies

PolicyManager

PolicyGateway

PolicyAgents Web Service

Monitor

Web Services

Policy Enforcement and Visibility: Monitoring

•Provide real-time visibility into Web Service interactions

•Automatic issue resolution by dynamic policy updates•Alerts about anomalies•Enforce policies•Validate compliance with IT best practices

ServiceServiceConsumersConsumers

Service Service ProvidersProviders

Service Communication

• Communicate with messages• No knowledge about partner• Likely heterogeneous

Service Interfaces andService Interfaces andService ImplementationsService Implementations

Service ConsumersService Consumers

Enterprise Service Bus (ESB)Enterprise Service Bus (ESB)

Service Service RulesRules

& Config& ConfigCh

ang

eC

han

ge

Service Platform (Virtual)

Co

ntr

ol

Co

ntr

ol

Service Service Reporting Reporting & Mgmt& Mgmt

An ESB Moves Data

ConnectConnectAdaptersAdaptersApps EventsApps EventsMetadataMetadataSecuritySecurityWS ManagerWS Manager

EnrichEnrichTransformationTransformationValue MappingsValue MappingsSystem XrefSystem XrefBusiness RulesBusiness Rules

DistributeDistributeRoutingRoutingProtocol BusProtocol BusMessagingMessagingGatewaysGatewaysInteroperabilityInteroperability

Monitoring and Configuration Monitoring and Configuration

Evolution of the Bus

ERP

Legacy

CRM

Proprietary Messaging

WSDLWSDL

WSDL

B2B

.NETPortal

WSDL WSDL

WSDL

Standards Based Messaging

Multi Protocol Bus

ERP

Legacy

CRM

WSDLWSDL

WSDL

SOAP/HTTP/ Reliable SOAP

OEMS, JMS, MQ, TIBCO

Local, In Memory

B2B

.NETPortal

WSDL WSDL

WSDL

Des

ign

Man

age

ESB enables SOA and EDA

• SOA – Service Oriented Architecture• Distributed, Web Services• WSDL, SOAP, XML, XSD• Registry Lookup, UDDI• Request / Reply

• EDA – Event Driven Enterprise• Message Oriented• Qualities of Service• Asynchronous Publish / Subscribe

Business VisibilityBusiness Visibility BusinessBusinessActivity MonitoringActivity Monitoring

Business ProcessBusiness ProcessOptimizationOptimization

SOA, EDA, ESB,SOA, EDA, ESB,BPM, RulesBPM, Rules

Better Quality Better Quality InformationInformation

Data HubsData HubsBusiness IntelligenceBusiness Intelligence

Ubiquitous Ubiquitous Information AccessInformation Access

Multi-ChannelMulti-ChannelComputingComputing

Improve WorkplaceImprove WorkplaceProductivityProductivity Enterprise PortalsEnterprise Portals

Greater AgilityTechnology Provides Solutions

Customer Needs Optimize Processes & Applications to Change

Share Information & Collaborate Productively

Build Flexible,AdaptableApplications

Take Decisions with Better Quality Information

Lower Technology Costs

Secure Access & Reduce Risks

DeveloperDeveloperProductivityProductivity

Integrated ServiceIntegrated ServiceEnvironmentEnvironment

Mainframe QOSMainframe QOSon Cheap HWon Cheap HW Grid ComputingGrid Computing

TechnologyTechnologyOptimizationOptimization

Systems Systems ManagementManagement

Security ComplianceSecurity Compliance Identity Identity ManagementManagement

Customization &Customization &MaintenanceMaintenance

Metadata & LifecycleMetadata & LifecycleManagementManagement

Lower CostsTechnology Provides Solutions

Oracle’s Response

Flexibility and Speed are Advantages

Service Oriented Architecture Grid Computing

SOA

React to changing processes React to changing demand

Application Server Clusters

Database Clusters

Networked Storage

Oracle Fusion MiddlewareModular & ConfigurableModular & Configurable

ApplicationsApplications SOA, Faces, EJBSOA, Faces, EJB

Flexible BusinessFlexible BusinessProcessesProcesses WSIF, ESB, BPELWSIF, ESB, BPEL

Actionable BusinessActionable BusinessIntelligenceIntelligence Hubs, BI, BAMHubs, BI, BAM

EnhancedEnhancedEmployee ProductivityEmployee Productivity

Portals, Mobile,Portals, Mobile,CollaborationCollaboration

Lowest TCOLowest TCO Grid, Systems Mgmt Grid, Systems Mgmt

Enhanced Security &Enhanced Security &ComplianceCompliance

Identity Mgmt,Identity Mgmt,Web Services MgmtWeb Services Mgmt

Oracle Fusion Middleware Overview

Cross Platform

Application Server• Oracle Application Server• WebLogic Server• WebSphere• JBoss

Database• Oracle Database• SQL Server• Oracle Lite• Sybase• DB2

IDE• JDeveloper• Eclipse

Operating Systems• Linux• Window XP/2003• Solaris• HP UX• AIX

Example: DSL Provisioning at BelgacomApplication for the provisioning and activation of DSL lines. Belgacom is processing up to 15,000 DSL provisions / day through SOA and BPEL processes which link their customer interfaces and OSS layer, managing activation and repair.

Struts

BPEL

Telco Activation Services

DSL Activation Manager

6000+ network equipment endpoints (SLEE gateway)

SDSL Activation Manager

Sales/Customer Service Interfaces and Order Review

Exception Management

Billing Services

Account Management Services

Reporting Services

Register for New ServiceSelf-service web appCall CenterTroubleshooting Request

Application Server

Oracle Applications-Exposing Services

SOAP WSDL

XML Gateway WSG Integration Broker

SOAP WSDL SOAP WSDL

All Oracle Applications can expose Web Services

No add on products required to get “Services”

Services provide the foundation for deep and adaptive industry processes.

Inventory CheckOrder Publish

Status Update “Shipped”Status Update “Complete”

Order To Invoice Process Flow

Further ReadingProduct

Details

•Authors: Dirk Krafzig, Karl Banke, Dirk Slama•Publisher: Prentice Hall PTR (November 9, 2004) •Language: English •ISBN: 0131465759

•Author: David Chappell •Publisher: O'Reilly Media, Inc.; 1 edition (June, 2004) •Language: English •ISBN: 0596006756

Product Details

•Author: Eric Newcomer, Greg Lomow•Publisher: Addison-Wesley Professional (December 14, 2004) •Language: English •ISBN: 0321180860

Further Reading

•Melissa Cook•Publisher: Prentice Hall PTR; 1 edition (January 22, 1996) •ISBN: 0134402561

•Howard Smith & Peter Fingar

•Publisher: Meghan-Kiffer Press;

(August 2003)

•ISBN: 0929652355

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