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1 SOA Planning Guide 1

2 Agenda q SOA Introduction q SOA Benefits q SOA Principles q SOA Framework q Governance q Measurement q Tools q Strategic (long term) View 2

3 Introduction to SOA q Service-oriented architecture (SOA) is an approach to loosely coupled, protocol independent, standardsbased distributed computing where software resources available on the network are considered as Services. q SOA is believed to become the future enterprise technology solution that promises the agility and flexibility the business users have been looking for by leveraging the integration process through composition of the services spanning multiple enterprises 3

4 Introduction to SOA Evolution of business automation Timeline 1960 s s 1980 s Early 1990 s Mid 1990 s Technology Mainframe (1 Tier) Desktop (1 Tier) Client/Server (2 Tier) Web (3 Tier) Service Oriented (No Tears!) Business Benefits Basic Automation More flexible Presentation Layer Migration of business logic into presentation layer Separation of business logic from presentation layer Abstraction from physical layer, loosely coupled, flexbile and highly adaptable systems, significantly lower TCO SOA provides the flexibility to rapidly adapt systems to meet changing business needs in a cost effective way. 4

5 Introduction to SOA Graphic from Booz Allen Hamilton Lightweight Application Integrated Tightly Coupled Lengthy, High Risk, Costly Development Costly Maintenance Messaging Visualization Business Logic Utilities Storage Security New Re-used Application Service Application Service Core Enterprise Services Storage Service Utility Services Security Services Messaging Services Flexible Loosely Coupled Agile Development rapid, lower cost, lower risk Lower support costs Platform Centric Net-Centric Migration from brittle-ware to software 5

6 Introduction to SOA q Key Characteristics of Services The software components in a SOA are services based on standard protocols. Services in SOA have minimum amount of inter-dependencies. Communication infrastructure used within an SOA should be designed to be independent of the underlying protocol layer. Offers coarse-grained business services, as opposed to fine-grained software-oriented function calls. Uses service granularity to provide effective composition, encapsulation and management of services. 6

7 Introduction to SOA q Key Definition: Service granularity refers to the scope of functionality a service exposes. Fine-grained services provide a small amount of businessprocess usefulness, such as basic data access. Coarse-grained services are constructed from fine-grained services that are intelligently structured to meet specific business needs. 7

8 Benefits of SOA q Provides location independence: Services need not be associated with a particular system on a particular network q Protocol-independent communication framework renders code reusability q Offers better adaptability and faster response rate to changing business requirements q Allows easier application development, run-time deployment and better service management Loosely coupled system architecture allows easy integration by composition of applications, processes, or more complex services from other less complex services q Provides authentication and authorization of Service consumers, and all security functionality via Services interfaces rather than tightly-coupled mechanisms q Allows service consumers (ex. Web Services) to find and connect to available Services dynamically 8

9 Benefits of SOA Characteristic Design & Implementation Resulting System Application Centric vs SOA Application-centric Service Oriented Architecture Architecture Coordination- Function-Oriented Oriented Built to Last Built to Change Incrementally Built & Long Dev Cycle Deployed Application Silos Enterprise Solutions Tightly Coupled Object-Oriented Interactions Loosely Coupled Semantic Message oriented interactions 9

10 SOA Principles q Ensure that services are aligned to business processes and models (data models, ontologies and taxonomies). q All services should be published into a central directory (common registry = UDDI) q Services should be abstracted from the physical layer, specific tools, products and languages. q Service should meet their commitments and demonstrate compliance through instrumentation & reportable metrics. 10

11 SOA Principles q Services should be adaptable, independent, flexible, efficient and resilient. q Services should be self contained and modular. q Services should be loosely coupled. q Ensure services are reusable by mapping discrete business processes to services and establishing sets of commonly available services within each layer. 11

12 SOA Framework (Generic Taxonomy) Enterprise Business Processes Enterprise & Business Services Strategic Road Mapping Business Planning Business Modeling Business Perf. Mgmt Services Business Collaboration PLM Services Workflow Services Collaboration Services Security Mgmt Services Domain Services BI Services Utility Services Portfolio Mgmt Services Process Mgmt Services Demand & Resource Mgmt Services Capacity Mgmt Services Data Mgmt Services Data Integration Services Orchestration / BPM Foundation Services Monitoring / BAM Personalization Scheduling Business Rules Authorization Authentication Auditing Configuration Logging Transaction Application Integration Services Transformer Adapter ODS Transformation Data Access 12

13 SOA Framework (Taxonomy Definitions) q Enterprise Business Processes These are typically defined, diagramed (eventually, modeled in a BPM tool) and make use of the underlying services mentioned below. q Enterprise / Business Services Business Services (LOB) (Order Mgmt, Inventory Mgmt, HR, Finance) Enterprise Services Commonly used across all LOBs (approve, escalate, validate) Domain Services These are specific to a LOB (Benefits Update, Customer Search, Budget Inquiry, Order Add, Order Update) Utility Services - (address lookup, mail, print, document mgmt) q Foundation Services These are commonly used fine-grained services which access the Technology Architecture (security, logging, auditing, orchestration). These are woven together by higher level services. q Application Integration Services Provides abstraction to the applications. Application functionality is exposed using these services to provide simplicity & insulation. q Data Integration Services Provides abstraction to the data sources 13

14 Governance q Scope includes: Prioritizing which services are built Validating compliance with architecture principles Encouraging reuse Change Management (see lifecycle mgmt) Control provisioning of services Monitoring Services Ensuring compliance to business SLA 14

15 Governance q Lifecycle Management for Services: Develop & Enable Service: Specify the properties, policies & function points Place the service into one of the 3 SOA layers Publish Service: Provider creates a WSDL document Provider publishes the WSDL on a Web Server Provider inserts an URL into the WS registry using (UDDI). Discover Service: Search the registry. Retrieve the URL Download the WSDL file. Manage Service: Monitoring & Maintenance (includes dependencies, policies, security and related run-time issues). 15

16 Governance q Roles & Responsibilities: We start with 3 basic players to create a service: The service provider (publish) The service requestor (find) The service registry (bind) We add additional players to provide governance and control to manage the assets and ensure the business commitments are met: Architecture Change Control Board (CCB) Business Process Owners SQA 16

17 Governance q SAP NetWeaver Administrator Responsibilities Start & Stop Change configuration Transport software changes Backup & Recovery Output Management User Management Job Scheduling Monitor systems Incident analysis 17

18 Governance q Change Management (must address 5 key viewpoints): Developer s View (implementation & testing) Designer s View (design, function pts & logic required for service) Quality Control View (traceability from use cases throughout development lifecycle, migration from Dev-Test-Prod) Architectural View (adherence to standards & principles) Business View (use cases / requirements, business process automation) see next slide 18

19 Governance: Viewpoints of SOA Designer (Logical ) View Developer (Build & Implement) View Business (Use Case) View Architecture (Principles) View Quality Control (Deployment) View 19

20 Measurement q Key metrics that we will want to consider capturing: Architecture Reusability Availability Resiliency Adaptability Operational Performance Usage Reliability Governance Traceability between Business Processes & Services Adherence to standards Change Mgmt / QE Metrics 20

21 Tool Options q SAP System Landscape Directory q SAP Solution Manager q SAP Netweaver / XI q UDDI Registry IBM s Tool (recommendation) q Java Web Service using SOAP Protocol q 3 rd Party Connectors q Enterprise Modeling Tool * *Reference the Data Management Framework RFI 21

22 Glossary of Terms (getting started) SOA Terms Examples UDDI WSDL SOAP HTTP, SMTP, FTP Programming (DOM, SAX) Schema (DTD, XSD) XML Phone Book Contract Envelope Mailperson Speech Vocabulary Alphabet 22

23 Sample Design Docs for Service (XI_Export_Products) 23

24 Sample: Sequence Diagram XI_Export_Products XI_Export_Products Val_Product_Export Update_Delphi_Product ProductExport() Good_ProductExport() Integer Update_Status Bad_ProductExport() 24

25 Sample: WSDL Steps to complete request Step 1-Fill out the below template and attach sequence diagrams or flow for service condition of use Step 2- to Service Requestor Step 3- Delphi Team will contact requestor about questions and timing for analysis and design Delphi Service Request Name Purposes Related Use Cases XI_Export_Products Export the list of Products from SAP Val_Product_Export Requestor Business Outcome Area Service Used By (Domain Area) Requestor name Conditions of Use Capacity Requirements Throughput Requirements Delphi Team CRM (Delphi Team) Your name The service will be called by Delphi team based on pre-defined schedule Not Estimated ~ 30K Records Method Input Description Description Data Type Max Amount Synchronous or Batch? Description Attribute 1 Date Attribute 2 Description String Attribute 3 Description Array Attribute 4 Description String Method Output Description Description Data Type XML document/message listing The XML document will contain a list of XML the records that were extracted product records that have be extracted from SAP (see schema below) from SAP Max Amount Exception and Error Handling. Description tbd Error Message Details XML Schema Double-click to see the entire document. 25

26 Strategic (long term) View 26

27 SOA Framework q Eventually, we will leverage Metadata to provide abstraction and adaptability for services: Bindings (to the data and/or physical layer) Business rules (logic, validation, diagnostics, error mgmt, escalation, event management) Ontologies for Services (will drive naming conventions) Eventually, semantic models will be introduced to manage Ontologies and meta models across domains (both inter and extra company) 27

28 Introduction to SOA 2006 MomentumSI SOA Adoption Guide While grassroots efforts can also produce positive ROI, the value threshold is crossed when decisions start being made that impact multiple projects or organizational units. At that point you are making shared infrastructure investments, developing models to share services and master data across the enterprise, and taking a conscious approach to managing the IT Portfolio around business process contributions and value. 28

29 SOA Framework (a few common patterns) q Transforms Data Cleansing Data Mapping q Transaction Referential Integrity Serialization Parallel Processing State Management q Validation Pattern Matching Type checks Format checks Boundary checks Reasonableness checks 29

30 Governance: Modeling Standard Future SOA Model (1 of 2) Requirements Specifications Implementations Domain / View (Conceptual) (Logical) (Physical) Business Standardized business services Business Service Bus WSDL specifications Business virtualization BPO Service architecture UDDI based service registry Purely information based products Information service specifications WSDL specifications Service based product components providing value add to physical products Service product specifications WSDL specifications Information Definition of the real information owner, internal and external to the business and strategy for managing that class of information Information currency and ownership distribution analysis Information access services Common semantics and domain applicability (business unit, enterprise, ecosystem, sector etc) Semantic standards XML documents and mapping and transformation rules Application Applications redefined as sets of business objects and related services Applications acquired as (hosted) services Service Service is first order construct in business process Service as unit of provision and consumption Delivered service Standard/common business services Standard/common business services Standard/common business services Standard/common infrastructural services Standard/common infrastructural services Business service patterns Domain business service patterns Business service contract templates Service specification contract templates and reusable components BPEL4WS or ebxml template specifications 30

31 Governance: Modeling Standard Future SOA Model (2 of 2) Requirements Specifications Implementations Domain / View (Conceptual) (Logical) (Physical) Component Business domains mirror business requirements for articulation Business components encapsulate a single business concept (entity or process) Offers well defined network interfaces that offer services Middleware Business Service Bus Wire protocol standards XML Messages Message security services Message security services Service Management Business rules Rule specifications XSLT or similar Business policies Policy specifications XSLT or similar Component and Service container Business service requirements Business trust requirement Service Level Agreements Trust specification Management services pipeline Dependency specifications, thresholds, contingency plans Monitoring policies and rules, breakpoints and escalation specifications Management services pipeline Platform Grid based services virtualize physical platform resource Platform functionality delivered as services Integrity Units define domains for trust, resource management, technical Virtual physical resources upgrade Device Device independent UI Service interface specification NOT the User Interface Service interface specification NOT the User Interface User Roles User profiles Directory Server 31

32 Phone: (847) Online: 32

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