Process-Driven SOA: Patterns for Aligning Business and IT

337 Pages·2011·8.14 MB·English

by  Carsten Hentrich

Information Technology / IT Management Process-Driven
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… organizations need an architectural foundation that enables continuous optimization, d
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accelerated innovation, and rapid transformation. That is exactly what this book r
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provides. It provides the architectural basis in the form of proven patterns that have S OA
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passed the test of time and are rightly positioned to form the stable core of future-ready
enterprise architecture.
—Subu Goparaju, Senior Vice President and Head of Infosys Labs
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Process-Driven SOA: Patterns for Aligning Business and IT supplies detailed guidance
on how to design and build software architectures that follow the principles of business- r Patterns for Aligning Business
IT alignment. It illustrates the design process using proven patterns that address complex o
IT
business/technical scenarios, where integrated concepts of service-oriented architecture (SOA), and
Business Process Management (BPM), and Event-Driven Architecture (EDA) are required. c
e
The book demonstrates that SOA is not limited to technical issues but instead, is a holistic
challenge where aspects of SOA, EDA, and BPM must be addressed together. An ideal guide
s
for SOA solution architects, designers, developers, managers, and students about to enter the
field, the book: s
-
• Provides an accessible introduction to basic and more advanced concepts in
process-driven SOA D
• Illustrates how to manage the complexities of business aligned IT architectures
with detailed examples and industry cases r
i
• Outlines a step-by-step design process using proven patterns to address complex
v
business/ technical scenarios
e
• Integrates SOA, BPM, and EDA into practical patterns promoting SOA 2.0
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Describing how to synchronize parallel enterprise processes, the authors explain how to
cope with the architectural and design decisions you are likely to encounter when designing

and implementing process-driven SOA systems. The decisions are described in the form of
S
software patterns to provide you with a practical guideline for addressing key problems using
time-tested solutions.
O
A
K14093
ISBN: 978-1-4398-8929-9
90000
Carsten Hentrich
www.crcpress.com
9 781439 889299
Uwe Zdun
www.auerbach-publications.com
K14093 cvr mech.indd 1 11/18/11 9:15 AM

Process-Driven
S O A
Patterns for Aligning Business
and IT
In an initiative to promote authorship across the globe, Infosys Press and CRC Press have
entered into a collaboration to develop titles on leading edge topics in IT.
Infosys Press seeks to develop and publish a series of pragmatic books on software
engineering and information technologies, both current and emerging. Leveraging Infosys’
extensive global experience helping clients to implement those technologies successfully,
each book contains critical lessons learned and shows how to apply them in a real-world,
enterprise setting. This open-ended and broad-ranging series aims to brings readers practical
insight, specific guidance, and unique, informative examples not readily available elsewhere.
Published in the series
.net 4 for enterprise Architects and developers
Sudhanshu Hate and Suchi Paharia
Process-Centric Architecture for enterprise software systems
Parameswaran Seshan
Process-driven sOA: Patterns for Aligning business and it
Carsten Hentrich and Uwe Zdun
Web-based and traditional Outsourcing
Vivek Sharma and Varun Sharma
in PrePArAtiOn fOr the series
scrum software development
Jagdish Bhandarkar and J. Srinivas
software Vulnerabilities exposed
Sanjay Rawat, Ashutosh Saxena, and Ponnapalli K. B. Hari Gopal
Process-Driven
S O A
Patterns for Aligning Business
IT
and
Carsten Hentrich
Uwe Zdun
CRC Press
Taylor & Francis Group
6000 Broken Sound Parkway NW, Suite 300
Boca Raton, FL 33487-2742
© 2012 by Taylor & Francis Group, LLC
CRC Press is an imprint of Taylor & Francis Group, an Informa business
No claim to original U.S. Government works
Version Date: 20111007
International Standard Book Number-13: 978-1-4398-8930-5 (eBook - PDF)
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Contents
Preface...............................................................................................................................................ix
Acknowledgments..........................................................................................................................xi
About.the.Authors.......................................................................................................................xiii
1 Introduction..............................................................................................................................1
What.This.Book.Is.About.........................................................................................................1
Target.Audience........................................................................................................................4
Software.Patterns......................................................................................................................4
Pattern.Form.and.Pattern.Chapter.Structure.......................................................................5
Structure.and.Overview.of.this.Book....................................................................................7
Guide.to.the.Reader................................................................................................................11
2 Service-Oriented Architecture: A Business Perspective...............................................13
Business.Agility.as.a.Driving.Force.....................................................................................13
Business.Process.Modeling...................................................................................................14
Business.Process.Modeling.versus.SOA.Modeling...........................................................16
Business.Process.Orientation.in.Business.Information.Systems.....................................17
Extracting.Business.Processes.from.Applications.............................................................19
Process-Aware.Information.Systems...................................................................................19
The.Business.Impact.of.Process-Driven.SOA.....................................................................21
3 Service-Oriented Architecture: A Technical Perspective.............................................23
Introduction.............................................................................................................................23
The.Infamous.SOA.Triangle..................................................................................................24
From.Interface.Descriptions.to.Service.Contracts..............................................................25
Service.Contracts................................................................................................................28
SOA.Layers..............................................................................................................................29
Adaptation.in.the.Remoting.Layer.......................................................................................30
Communication.Protocol.Adaptation.............................................................................31
Message-Processing.Adaptation......................................................................................32
Service.Provider.Adaptation............................................................................................33
Service.Client.Adaptation.................................................................................................34
SOA.and.Business.Processes:.Integrating.Services.and.Processes..................................34
Enterprise.Service.Bus...........................................................................................................38
SOA.and.Event-Driven.Architecture...................................................................................39
4 Pattern Language Walk-Through: An Example from the Insurance Business.........41
Claims.Management.as.a.High-Level.Business.Domain.View........................................41
Modeling.the.Claims.Management.Macroflow.Processes...............................................42
Business.Domain.View.of.the.Claims.Notification.Process........................................45
Business.Domain.View.of.the.Claim.Reserve.Process.................................................45
Business.Domain.View.of.the.Triage-and-Assignment.Process.................................45
Business.Domain.View.of.the.Claim.Investigation.Process........................................45
Business.Domain.View.of.the.Claim.Negotiation.Process..........................................45
v
vi Contents
Modeling.Claims.Management.Use.Cases.as.Microflows...............................................48
Claims.Data.as.a.Central.Resource......................................................................................49
Technical.Architecture.for.Claims.Management...............................................................53
Technical.Claims.Process.Modeling.and.Implementation...............................................54
Technical.Domain.View.of.the.Claim.Notification.Process........................................56
Technical.Domain.View.of.the.Claim.Reserve.Process................................................57
Technical.Domain.View.of.the.Triage-and-Assignment.Process................................58
Technical.Domain.View.of.the.Claim.Investigation.Process.......................................58
Technical.Domain.View.of.the.Claim.Negotiation.Process.........................................60
Technical.Design.of.the.Service.Interfaces..........................................................................60
Technical.Design.of.Automatic.Microflows.and.Service.Components...........................64
User.Interface.Implementation.............................................................................................66
5 Decomposing and Executing Business-Driven and Technical Processes..................69
Introduction.............................................................................................................................69
Domain/Technical.View.....................................................................................................76
Macro-/Microflow..............................................................................................................81
Macroflow.Engine...............................................................................................................87
Microflow.Engine................................................................................................................90
Case.Study:.Business.Transformation.of.Telecom.Order.Management.........................95
6 Integration and Adaptation in Process-Driven SOAs.................................................103
Introduction...........................................................................................................................103
Integration.Adapter.........................................................................................................109
Integration.Adapter.Repository....................................................................................115
Configurable.Dispatcher.................................................................................................118
Process.Integration.Architecture...............................................................................121
Case.Study:.Java.Implementation.of.Process-Based.Business.Services.Integration......125
7 Aligning Business Goals and Service Design...............................................................137
Problems.of.Aligning.Business.Goals.and.Service.Design............................................137
Designing.Business-Driven.Services.................................................................................138
8 Business Object Integration: How to Deal with the Data?.........................................143
Introduction...........................................................................................................................143
Business.Object.Models..................................................................................................143
Synchronization.on.Business.Objects...........................................................................146
Integrating.External.Systems.........................................................................................147
Business.Object.Reference...............................................................................................148
Business.Object.Pool..........................................................................................................150
Private-Public.Business.Object.......................................................................................153
Service-Based.Integration.of.External.Systems................................................................160
Data.Integration.Issues.in.SOAs.........................................................................................163
Restructuring.the.External.System.for.Service-Based.Integration................................165
Integrated.Business.Object.Model................................................................................167
Data.Transformation.Flow.............................................................................................171
Case.Study:.Business.Object.Integration.in.a.Telecommunications.SOA.Project.......175
Contents vii
9 Process Design: Mapping Domain Views to Technical Views..................................181
Introduction...........................................................................................................................181
Generic.Process.Control.Structure.............................................................................187
Process.Interrupt.Transition.........................................................................................199
Activity.Interrupt.............................................................................................................202
Process-Based.Error.Management................................................................................209
Timeout.Handler................................................................................................................216
Waiting.Activity.................................................................................................................220
10 Integrating Events into Process-Driven SOAs..............................................................225
Introduction...........................................................................................................................225
Event-Based.Activity.........................................................................................................230
Event-Based.Process.Instance.........................................................................................235
Event-Based.Process.Split................................................................................................239
Event.Dispatcher................................................................................................................242
11 Invoking Services from Processes...................................................................................247
Introduction...........................................................................................................................247
Synchronous.Service.Activity.........................................................................................251
Fire-and-Forget.Service.Activity...................................................................................258
Asynchronous.Result.Service.........................................................................................263
Multiple.Asynchronous.Results.Service.....................................................................270
Fire.Event.Activity............................................................................................................275
Asynchronous.Subprocess.Service.................................................................................279
Condition.Deadline.Service............................................................................................283
12 Synchronization of Processes Running in Parallel......................................................287
Introduction...........................................................................................................................287
Register.for.Action............................................................................................................288
Bundle.Process.Agent.......................................................................................................292
Process.Conductor.............................................................................................................298
Appendix: Related and Referenced Patterns........................................................................305
Overview.of.Related.Patterns.............................................................................................305
Thumbnails.of.Referenced.Patterns...................................................................................306
References....................................................................................................................................317