Web Service Contracts in the VA/DoD Federated Enterprise
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1 Web Contracts in the VA/DoD Federated Enterprise September 6, 2013 John Wolf Architecture, Engineering & Integration 1
2 SESSION OBJECTIVES Define Integration Activities and Roles Define Web Contract Introduction Review a notional approach to service integration using SOA principles High level process flow for a service to move through the service lifecycle phases Roles and responsibilities 2 2
3 SOA INTEGRATION Definition Planning, development and architecture and engineering services required to implement an end-to-end functional service oriented solution Multi-faceted, multi-team, multi-discipline requirements for on boarding a new and/or re-using existing services to the SOA environment Synonymous with on-boarding a service Involves multiple actors with role according to life cycle phase Owner (Business) Oriented Enterprise (SoE) Center of Excellence (CoE) Integrator Developer SOI Integration, Deployment, and Operations 3 3
4 SOA INTEGRATION (CONT.) Major Integration steps include (but not limited too): 1. Determine Business and Technical need (Government Acquisition based on requirements) 2. Sponsor facilitates SOA completing the First Contact Form 3. Review Registry Catalogue for existing services 4. SOE CoE Review and approval to develop a new service 5. Prepare artifacts/documents for the /Web Contract 6. Develop and Test the (s) (Agile development for DoD/VA) 7. Perform the Integration Planning (Security, Test and Pilot/IOC etc) 8. Conduct Joint Integration Testing, Government Acceptance Test and deploy solution according to ATO/ATC approval 4 4
5 SERVICE CONTRACT AND WEB SERVICE CONTRACTS A Contract is comprised of a set of documents representing the meta information about the technical interface The Web contract defines what a service does, how it does it and where it is located. A Typical Web Contract has one WSDL that can link to one or more XML Schema and Web Policy definitions Overarching Goals of a Contract are strategic in nature with long term benefits. A Basic List of Goals and Benefits are: Increased Intrinsic Interoperability Increased Federation Increased Open Source/Vendor Options Increased Business and Technology Domain Alignment Increased ROI (Broader reaching value) Increased Organizational Agility Reduced IT Burden Human Readab WSDL XML Schema(s) WS-Policy(s) Level Agreement Technical Web Contract Contract Reference: Web Contract Design and Versioning, Thomas Erl, 2009 SOA Systems, Inc. 5 5
6 WEB SERVICE DEFINITIONS AND RELATIONSHIP The Web contract defines what a service does, how it does it and where it is located. Producers complete the service description Intake form and provide registration information for WebSphere Registry Repository (WSRR) or UDDI WSRR or Open Source UDDI provides the policy authoring tools that allows you to quickly and easily define the policy and attach them to the service SLA in WSRR/UDDI. Consumer applications can query WSRR/UDDI to obtain the service endpoint and invoke the service for fulfillment of the requests. Policies are enforced according to Role Based and Attribute Based Access Controls associated with the service. WS-Policy Types for Policy definitions Policy assertions Attach to Can be Enforced via WSDL Definition XML Schema Types for Message definitions WS-Addressing Headers Types for header Body & fault message parts Message definitions Result in Provides dynamic Routing features for SOAP Message 6 6
7 SERVICE ORIENTED ENTERPRISE (SOE) CENTER OF EXCELLENCE (COE) The Governance Board is responsible for service portfolio management, the service lifecycle (including design, development, governance), and implementation and maintenance of SOA services Both VA and DoD are responsible for individual agency unique applications The three organizations - IPO, DoD, and VA - have agreed to work collectively to develop and utilize common definitions, taxonomies, standards for all layers of technology where practical to gain efficiencies of commonalities and facilitate reuse. VA OIT ASD ESS/SOA DoD MHS OCTO SOEGC HEC Compliance / communication JEC HEC IM/IT Working Group ICIB AERB BEC Interagency SOE-GC Work Group Technical Directorate SOE CoE Business Working Group (W-IPT) Technical Working Group (W-IPT) IPO TRB IPO Advisory Board IPO CIRD iehr PM VLER Health PM TD - IA TD S&I TD A&E PM iehr SE&A. Proposals and approvals 7 7
8 COLLABORATION BETWEEN BUSINESS AND TECHNICAL WORKING GROUPS Business Working IPT Responsible for business related activities (e.g., capabilities, prioritization, risk management, business requirements review) and liaising with the Business User. Includes representation from the iehr, VLER PM and the Clinical Informatics Requirements Division (CIRD). Technical Working IPT Responsible for technical activities (e.g.., standards, processes, taxonomy, naming conventions etc.) and liaising with technical organization. Includes representation from the Information Assurance (Security), Architecture, Standards and Interoperability and Infrastructure workstreams. Cost Analysis Portfolio Mgmt Business Working IPT CRM Risk Mgmt SOE CoE Business Executive Operations Security Infrastructure Technical Working IPT SOA Architecture Information Mgmt Testing and QA 8 8
9 ROLES AND FUNCTIONS OF A GOVERNANCE COMMUNITY OF EXCELLENCE Define policies, procedures and guidelines for Oriented Enterprise (SOE) Provide Standards and Compliance according to the established acceptable reference architecture upon which policies, procedures, and guidelines will be followed by the community (Producers and Consumers) Trade-offs are the degree of decoupling desired balanced with reuse, redesign or build new services Provide a the process and procedure for Federated s to be Registered Discoverable Secured Review SOE Initiatives for compliance with policies, procedures, and guidelines Develop and maintain SOE toolkits, metadata repositories and SOE Proof of Concepts 9 9
10 ROLES AND RESPONSIBILITIES SERVICE INTEGRATION Actor SOE CoE Responsibility Ensures compliance, with architecture and design standards, waiver and communication policies and processes Provides guidance, advice and technical assistance for implementation and application of the iehr Owner Developer Integrator SOA Suite Development Team Exercise managerial ownership over a service throughout the Lifecycle Develop the service Integrate services working with the SOI team, developers to integrate the service into the existing SOA environment bring including integration testing and user acceptance testing Support the Developer and integrator. Provide software development kits (SDKs) and integration support for developed services. SOA Suite Operations Team Deploy and operate the service on the Enterprise Bus (ESB) Provide help desk services, capacity planning and management, system updates and migration
11 SERVICE ON-BOARDING PROCESS SHOWING ACTORS 11
12 SERVICE INTEGRATION STEPS Contract Definition Integration Development Documentation Integration Testing Define: Define: Update applicable Documentation Document: URI Endpoints Naming conventions Network Segments Ports, protocols, services Security Boundaries Policy and Roles Data Formats SLAs Message types and size Interface Specifications Use Cases Message Flows Required SOA Capabilities: Orchestration Transformation Rules Mediation Interface Control Document System Development Document Architecture Views Administration Guides Installation Guide Deployment Guide Exit Criteria Test Plans Test Reports Security Scan Results Authority To Operate Authority to Connect Entry Criteria 12 12
13 AGILE APPROACH TO SERVICE INTEGRATION 13
14 Charnoky 16 Aug 2013 WSRR GOVERNANCE AND RUNTIME ARCHITECTURE Message Broker Message Queue Message Flows Message Flows Provider Build Consumer Lookup Registry Lookup Node Message Broker Communication to WSRR End Point Lookup Node Registered s Inventory WSRR Governance Master Registry Repository Governance Policies Lifecycle Mgmt Metadata Governance Registry Promotion s move through their lifecycle Catalog WSRR Runtime Runtime Visible Registry Accessible Discovery Policy Resolution Metadata Query End Point selection Policy Resolution #1 #2 Consumer Lookup Call up 14
15 QUESTIONS 15 15
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