ASG - Towards the Adaptive Semantic Services Enterprise Harald Meyer WWW Service Composition with Semantic Web Services

Copyright © ASG 1 Adaptive Services Grid project  EU Integrated Project: 24 months "Adaptive Services Grid": Research foundations, concepts, and languages to develop architectures, tools and a generic, domain- independent software service platform as well as domain-specific solutions that prototypically implement business models that are based on the service-orientation paradigm  Focus on Architecture and proof-of-concept platform prototype on concepts, languages, architectures and tools

Copyright © ASG 2 Consortium  Consortium  Application partners Telecommunications, IT Enterprise solutions  Technology and Research partners Software Technology, Semantic Web Services Process and Workflow Technology Agent-based Systems, Grid Infrastructure Technology  21 Partners: D (9), PL (6), A(2), IRE, N, SF + AUS

Copyright © ASG 3 What is currently happening  Milestone M12  ASG Reference Architecture  Prototype Development M6: Clarify interfaces and interactions M12: Verify architecture using a business scenario  Business Scenario: Attraction Booking

Copyright © ASG 4 Plattform Features Overview

Copyright © ASG 5 ASG Façade: The ASG Entry Point  Serves as the entry point for ASG clients  Provides an interface to all ASG platform functionalities Service Invocation/Planning/Negotiation Service Monitoring Service Registration ASG Platform Administration  Will be available in platform and protocol independent format

Copyright © ASG 6 Discovery Database: The ASG Data Central  Holds all internal ASG data that is needed to run the platform Service Specifications Service Semantics Service Implementation References Service Compositions SLA, Service Profiles, …  Queries allow to effective retrieval of needed data (e.g. semantically equal services)

Copyright © ASG 7 Service Discovery: Finding the correct functionality  Semantic discovery of services  Answers the question: What services do what I need to reach my goal?  Queries the Discovery Database  Used for Service Composition Planning

Copyright © ASG 8 Service Composition Planning: The End of Manual Process Modeling  Automatically creates a service composition that reaches the user’s goal  Planning strategy bases on service semantics  Uses a standard (WS-BPEL) description for service compositions which can be enacted by various of workflow management products

Copyright © ASG 9  Negotiates with service providers to find the service implementation that best fulfil the user’s requirements  Optimizes non-functional properties of a service composition enactment Service Negotiation: Discovering the best Service Implementations

Copyright © ASG 10  ASG manages contracts with service providers as service level agreements (SLA)  Life-cycles of SLA are maintained by a sophisticated component to gain a ready- for-business solution Service Level Agreements: Contracting with Service Providers

Copyright © ASG 11 Workflow Enactment: Reliable, Standardized, Monitored  Enacts service compositions provided by the Composition Planner (WS-BPEL)  Makes use of ASG’s enhancements for enactment (Negotiation, Re-Planning)  Exposes sophisticated monitoring functionality

Copyright © ASG 12  Register a new service  Create a new service implementation out of an existing one to change non- functional properties: Switch platform / technology Increase performance Lower costs Service Management: Easily Create and Register new Services

Copyright © ASG 13  Logs service behaviour during enactment Performance Reliability Functional correctness …  Gathers information to provides hints and predictions to support service selection Service Profiling: Know Your Services

Copyright © ASG 14  Triggers a re-planning of a to-be-enacted service composition if an error during enactment occurred  Analyses the current enactment state to generate the optimal re-planning request for the rest of the composition  Introduces fault-tolerance and intelligent system behavior Mediated Re-planning: Intelligent Problem Solving

Copyright © ASG 15  Unified, standardized service resource grid  Flexible, fault-tolerant service integration at runtime  Bringing the grid paradigm to service- oriented computing Services Grid Infrastructure: ASG Gateway to the external Services Landscape

Copyright © ASG 16 ASG – a Reference Architecture based on Standards  Use only the components required for your specific solution  Integrate your preferred products into the ASG architecture

Copyright © ASG 17 Summary – The ASG Benefits  Open, standard-based Architecture  Semantics awareness  Flexibility  Automated service composition  Automated negotiation  Reliability, Scalability, Performance

Copyright © ASG 18 Example ASG Context