Service Oriented Architecture. 9. Integration Darmstadt University of Applied Sciences, Department of Computer Science Dr. Markus Voß (Accso GmbH)
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1 SOA Service Oriented Architecture 9. Integration Darmstadt University of Applied Sciences, Department of Computer Science Dr. Markus Voß (Accso GmbH)
2 Today s topic 1. Introduction 2. Business Architecture 3. Designing Domains 4. Designing Components 5. Designing Interfaces and Operations 6. Loose Coupling 7. Excursus: Business Information Systems 8. Web Services 9. Integration 10. Service Orchestration 11. Evolution of Application Landscapes 2
3 Technical Reference Architecture Integration in the context of the enterprise architecture framework Business Geschäft Information System (IS) IT Technical Infrastructure (TI) Kontextuell Contextual (warum?) (why?) Konzeptionell Conceptual (what?) (was?) Logisch Logical (how?) (wie?) Physisch Physical (with (womit?) what?) Geschäftsstrategie Business Strategy Business Architecture Business Geschäftsarchitektur Architecture (Business (Geschäftsservices, Services, Business Geschäftsprozesse, Processes, Geschäftsobjekte, Business Objects, Organisation, Organisation) etc.) IT Strategy Domänen Ideal Application Domains und Technical Landscape and Domänen Technische Services (Anwendungs-) Services Application Services und Services Domänen Technische Services (Anwendungs-) und Services Logische Technische Services Logische Logical (Anwendungs-) Logical Anwendungs- Application und and AL-Komponenten AL-Components Services Logische Logische Integration Integrationsplattformen Logische Platforms und and ihre their Schnittstellen Interfaces Anwendungs- und AL-Komponenten Logische Integrationsplattformen und ihre Schnittstellen Anwendungs- und AL-Komponenten Physische Physische Physical Integrationsplattformen und ihre Schnittstellen Physical Anwendungs- Application undand AL-Komponenten AL-Components Physische Physische Integration Integrationsplattformen Physische Platforms und and ihre their Schnittstellen Interfaces Anwendungs- und AL-Komponenten Physische Integrationsplattformen und ihre Schnittstellen Anwendungs- und AL-Komponenten Integrationsplattformen und ihre Schnittstellen Integration AS IS TO BE Evolution IDEAL 3
4 Agenda Definitions Reference architecture Example Literature 4
5 Integration: Moving from the logical to the physical view logical Booking Kernel Account ing Logical Name Implemented via integration plattform, e.g. Business Process Engine physical TUBSY SAP FI Physical Name Physical interface SAP BAPI Use of integration platform, e.g., Enterprise Service Bus (ESB) 5
6 Definition: Physical Coupling Physical coupling means the access of one physical AL component to another via physical interfaces. The access is realized via technical services, particularly communication and transformation. Technical services are provided by an integration platform. 6
7 Definition: Orchestration Orchestration can be used to implement an AL component via technical services of an integration platform. This is done by configuring the invocation sequence of imported physical interfaces e.g. by writing a model of an according business process to be executed by technical services for orchestration. As a result, (new) physical interfaces are exported. 7
8 Orchestration: Implementation of a process component within an integration platform Component of the integration platform Physical interface to business process dervice L Business process model Physical business process component implementation Process Engine Business process model inside L Business logic A L Business logic B Imported physical interface 8
9 Definition: Integration An AL component A integrates (at least two) AL components B1,, Bn if A is physically coupled with B1,, Bn. Orchestration therefore is a typical integration pattern. 9
10 Types of physical interfaces -> integration types A P L D Type Presentation (P): User Interface of AL component Type Logic (L): API to business logic of AL component Type Data (D): Data(base) access to AL component 10 Integration types: Presentation integration: physical coupling via presentation type interfaces Logic integration: physical coupling via logic type interfaces Data integration: physical coupling via data type interfaces Alternative (non-uml): A
11 Transformation between interface types Target Source Presentation Logic Data Presentation Portlet-Integration, Presentationtransformation, Clipping Service Portlets SQL Portlets Logic Screen Scraping Service Adapters SQL Adapter Data Data consolidation, federation, and propagation 11
12 Integration Architecture P Travel Portal Identification of physical AL components Identification of physical interfaces Physical coupling of AL components Use of technical services of integration platforms, e.g., communication, transformation (T) and orchestration (O) T P Travel Catalog L (ESB) UTM Adapter L (UTM) Booking Package Tours O Portal Server P ESB T Portlet asynchrones Messaging Exactly once O L (ESB) Booking Custom Tours BPEL-Engine P ESB T Portlet synchroner RPC best effort 12 L (ESB) Customer Management L (ESB) Virtual Resource Managment L (ESB) Custom Tour Configurator
13 Agenda Definitions Reference architecture Example Literature 13
14 Reference architecture for integration platforms (logic integration): Technical services for integration in a SOA Business applications Integration platform (IP) integrated via... Implemented via... Runtime services Development services Runtime Mgmt. Transformation Communication Development Monitoring Logical transformation Logging Delivery Naming Process modelling Fault tolerance Load balancing Exception handling Technical transformation Security Authentication Authorization Process Mgmt. Business Activity Monitoring Process Engine Workflow Mailbox Transaction Event Mgmt. Human interaction Repository Organization repository Process repository Service repository Transformation modelling Adapter development Configuration management 14
15 Product Map Example: IBM WebSphere Business applications Integration platform (IP) Integrated via... Implemented via... Runtime servics Development services Runtime Mgmt. Transformation Communication Development WebSphere ESB incl. WebSphere MQ Web Sphere Business Modeller WebSphere Adapter Process Mgmt. WebSphere Business Monitor Repository WebSphere Integration Developer Sicherheit Tivoli Workflow WebSphere Process Server WebSphere Service Registry & Repository Clear Case 15
16 Reference to the next lecture on Service Orchestration and BPM Integration platform (IP) Runtime services Business applications integrated via... Implemented via... e.g. BPM Engines Development services Runtime Mgmt. Transformation Communication Development Monitoring Logical transformation Logging Delivery Naming Process modelling Fault tolerance Load balancing Exception handling Technical transformation Security Authentication Authorization Process Mgmt. Business Activity Monitoring Process Engine Workflow Mailbox Transaction Event Mgmt. Human interaction Repository Organization repository Process repository Service repository Transformation modelling Adapter development Configuration management 16
17 Agenda Definitions Reference architecture Example Literature 17
18 Project: Implement an internet portal for selling insurances of different classes Web Tier Sales Portal HTML Internet end user may get information on and order insurance products Uniform sales portal for selling insurance product of different classes, e.g., A. Life insurance B. Automobile insurance Portal shall be integrated in back-end applications of insurance corporation 18
19 Existing legacy back-end applications Existing legacy applications: A. Life insurance: needs extensions for internet sale B. Automobile insurance: may be used directly for internet sale Technology of legacy applications: Host technology: implemented in COBOL using CICS transaction monitor SQL database DB2 on host 3270 dialogs -> all types of physical interfaces 3270 CICS 3270 CICS Host SQL Insurance Application Class A Insurance Application Class B SQL 19
20 How to build the portal? Alternative 1: Throw everything away! Implement new Insurance applications for all classes (life, automobile, etc.) in Java (JEE) on Unix servers Implement portal using Java Server Faces (JSF) technology Pros / Cons Extremely costly Extremely risky Extremely time-consuming Modern technology 20
21 How to build the portal? Alternative 2: Web Services forever! HTML Web Tier Web Server Pros / Cons Middle Tier Web Application Costly (Adaptation of host applications) Time-consuming Host CICS Adapter CICS Insurance Application Class A Web Services CICS Insurance Application Class B CICS Adapter Architecturally brilliant 21
22 How to build the portal? Alternative 3: Smart integration architecture HTML Web Tier Middle Tier Host CICS Adapter HTML Web Application Class A CICS Insurance Application Class A Portal Server CMS HTML Web service HTML Screen Scraping Portlet 3270 Insurance Application Class B Pros / Cons Cost-effective Rapid implementation Optimal reuse of existing applications Adequate architecture Limited extensibility 22
23 Agenda Definitions Reference architecture Example Literature 23
24 Literature Gregor Engels, Andreas Hess, Bernhard Humm, Oliver Juwig, Marc Lohmann, Jan-Peter Richter, Markus Voß, Johannes Willkomm: Quasar Enterprise Anwendungslandschaften serviceorientiert gestalten. dpunkt-verlag Chapter 6. Integration in Anwendungslandschaften Chapter 7. Integrationsplattformen 24 Bernhard Humm, Marc Lohmann, Markus Voß, Johannes Willkomm: Ein praxiserprobtes Rahmenwerk für die technische Anwendungsintegration ("A framework for technical application integration, proven in practise" - in German). In: Bleek, W.-G., Schwentner, H., Züllighoven, H. (Hrsg.): Software Engineering Beiträge zu den Workshops. Lecture Notes in Informatics, Band 106, Gesellschaft für Informatik, 2007.
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