Verfügbarkeit: Service oriented architecture

Service oriented architecture: concepts, technology, and design

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Bibliographische Detailangaben
1. Verfasser:	Erl, Thomas (VerfasserIn)
Format:	Buch
Sprache:	English
Veröffentlicht:	Upper Saddle River, NJ ; Munich [u.a.] Prentice Hall 2006
Ausgabe:	5. print.
Schlagworte:	Serviceorientierte Architektur Computerarchitektur XML Web Services
Online-Zugang:	Inhaltsverzeichnis Klappentext
Beschreibung:	XXVIII, 760 S. Ill., graph. Darst.
ISBN:	0131858580

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Datensatz im Suchindex

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adam_text	Preface XXVII Chapter I Introduction ι 1.1 Why this book is important ..............................2 1.1.1 The false SOA .........................................2 1.1.2 The ideal SOA .........................................3 1.1.3 The real SOA ..........................................4 1.2 Objectives of this book .................................4 1.2.1 Understanding SOA, service-orientation, and Web services ......5 1.2.2 Learning how to build SOA with Web services ................5 1.3 Who this book is for ....................................6 1.4 What this book does not cover ...........................6 1.5 How this book is organized ..............................7 1.5.1 Part I: SOA and Web Services Fundamentals ................8 1.5.2 Part II: SOA and WS-* Extensions ........................10 1.5.3 Part III: SOA and Service-Orientation ......................13 1.5.4 Part IV: Building SOA (Planning and Analysis) ...............14 1.5.5 Part V: Building SOA (Technology and Design) ..............16 1.5.6 Conventions ..........................................19 1.6 Additional information .................................19 1.6.1 The XML & Web Services Integration Framework (XWIF) ......19 1.6.2 www.soabooks.com ....................................20 1.6.3 Contact the Author .....................................20 x Contents Chapter S. Case Studies 21 2.1 How case studies are used .............................22 2.1.1 Style characteristics ....................................22 2.1.2 Relationship to abstract content ..........................22 2.1.3 Code samples ........................................23 2.2 Case #1 background: RaiiCo Ltd .........................23 2.2.1 History ..............................................23 2.2.2 Technical infrastructure .................................23 2.2.3 Automation solutions ...................................24 2.2.4 Business goals and obstacles ............................24 2.3 Case #2 background: Transit Line Systems Inc ..............25 2.3.1 History ..............................................26 2.3.2 Technical infrastructure .................................26 2.3.3 Automation solutions ...................................27 2.3.4 Business goals and obstacles ............................27 Part ł SOA and Web Services Fundamentals 29 Chapter 3 Introducing SOA зі 3.1 Fundamental SOA.................................... 32 3.1.1 A service-oriented analogy ..............................32 3.1.2 How services encapsulate logic ..........................33 3.1.3 How services relate ....................................35 3.1.4 How services communicate ..............................35 3.1.5 How services are designed ..............................36 3.1.6 How services are built ..................................37 3.1.7 Primitive SOA ........................................38 3.2 Common characteristics of contemporary SOA ..............40 3.2.1 Contemporary SOA is at the core of the service-oriented computing platform ....................................41 3.2.2 Contemporary SOA increases quality of service ..............42 Contents xi 3.2.3 Contemporary SOA is fundamentally autonomous ............42 3.2.4 Contemporary SOA ¡s based on open standards .............43 3.2.5 Contemporary SOA supports vendor diversity ...............43 3.2.6 Contemporary SOA promotes discovery ....................44 3.2.7 Contemporary SOA fosters intrinsic interoperability ...........45 3.2.8 Contemporary SOA promotes federation ...................45 3.2.9 Contemporary SOA promotes architectural composability ......46 3.2.10 Contemporary SOA fosters inherent reusability ..............47 3.2.11 Contemporary SOA emphasizes extensibility ................48 3.2.12 Contemporary SOA supports a service-oriented business modeling paradigm .............................48 3.2.13 Contemporary SOA implements layers of abstraction ..........49 3.2.14 Contemporary SOA promotes loose coupling throughout the enterprise ...........................................50 3.2.15 Contemporary SOA promotes organizational agility ...........51 3.2.16 Contemporary SOA is a building block .....................52 3.2.17 Contemporary SOA is an evolution ........................53 3.2.18 Contemporary SOA is still maturing .......................53 3.2.19 Contemporary SOA is an achievable ideal ..................53 3.2.20 Defining SOA .........................................54 3.2.21 Separating concrete characteristics .......................55 3.3 Common misperceptions about SOA ......................56 3.3.1 An application that uses Web services is service-oriented. .....56 3.3.2 SOA is just a marketing term used to re-brand Web services. .. 57 3.3.3 SOA is just a marketing term used to re-brand distributed computing with Web services. ...........................57 3.3.4 SOA simplifies distributed computing. .....................57 3.3.5 An application with Web services that uses WS-* extensions is service-oriented. ...........................58 3.3.6 If you understand Web services you won t have a problem building SOA. .................................58 3.3.7 Once you go SOA, everything becomes interoperable. ........59 3.4 Common tangible benefits of SOA ........................59 3.4.1 Improved integration (and intrinsic interoperability) ............60 3.4.2 Inherent reuse ........................................60 3.4.3 Streamlined architectures and solutions ....................61 3.4.4 Leveraging the legacy investment .........................61 3.4.5 Establishing standardized XML data representation ...........62 XU Contents 3.4.6 Focused investment on communications infrastructure .........63 3.4.7 Best-of-breed alternatives ..............................63 3.4.8 Organizational agility ...................................63 3.5 Common pitfalls of adopting SOA ........................64 3.5.1 Building service-oriented architectures like traditional distributed architectures ................................65 3.5.2 Not standardizing SOA .................................65 3.5.3 Not creating a transition plan .............................66 3.5.4 Not starting with an XML foundation architecture .............67 3.5.5 Not understanding SOA performance requirements ...........67 3.5.6 Not understanding Web services security ...................68 3.5.7 Not keeping in touch with product platforms and standards development .........................................69 Chapter 4 The Evolution of SOA 71 4.1 An SOA timeline (from XML to Web services to SOA) .........72 4.1.1 XML: a brief history ....................................72 4.1.2 Web services: a brief history .............................73 4.1.3 SOA: a brief history ....................................74 4.1.4 How SOA is re-shaping XML and Web services ..............76 4.2 The continuing evolution of SOA (standards organizations and contributing vendors) ..............................78 4.2.1 Standards vs. Specifications vs. Extensions ..............78 4.2.2 Standards organizations that contribute to SOA ..............79 4.2.3 Major vendors that contribute to SOA ......................82 4.3 The roots of SOA (comparing SOA to past architectures) ......86 4.3.1 What is architecture? ...................................86 4.3.2 SOA vs. client-server architecture .........................88 4.3.3 SOA vs. distributed Internet architecture ....................95 4.3.4 SOA vs. hybrid Web service architecture ..................104 4.3.5 Service-orientation and object-orientation (Part 1)............107 Contents Xiii Chapter 5 Web Services and Primitive SOA 109 5.1 The Web services framework...........................Ill 5.2 Services (as Web services) ............................112 5.2.1 Service roles ........................................114 5.2.2 Service models ......................................126 5.3 Service descriptions (with WSDL) .......................131 5.3.1 Service endpoints and service descriptions ................133 5.3.2 Abstract description ...................................134 5.3.3 Concrete description ..................................135 5.3.4 Metadata and service contracts .........................136 5.3.5 Semantic descriptions .................................137 5.3.6 Service description advertisement and discovery ............138 5.4 Messaging (with SOAP) ...............................142 5.4.1 Messages ..........................................143 5.4.2 Nodes .............................................149 5.4.3 Message paths ......................................152 Part II SOA and WS-* Extensions 155 What is WS-* ? .....................................157 Chapter 6 Web Services and Contemporary SOA (Part I: Activity Management and Composition) 159 6.1 Message exchange patterns ...........................162 6.1.1 Primitive MEPs ......................................163 6.1.2 MEPs and SOAP .....................................169 6.1.3 MEPs and WSDL .....................................169 6.1.4 MEPs and SOA ......................................171 6.2 Service activity ......................................172 6.2.1 Primitive and complex service activities ...................174 6.2.2 Service activities and SOA .............................175 xiv Contents 6.3 Coordination ........................................177 6.3.1 Coordinator composition ...............................179 6.3.2 Coordination types and coordination protocols ..............180 6.3.3 Coordination contexts and coordination participants ..........180 6.3.5 The activation and registration process ....................181 6.3.5 The completion process ...............................182 6.3.6 Coordination and SOA .................................183 6.4 Atomic transactions ..................................186 6.4.1 ACID transactions ....................................187 6.4.2 Atomic transaction protocols ............................188 6.4.3 The atomic transaction coordinator .......................188 6.4.4 The atomic transaction process ..........................189 6.4.5 Atomic transactions and SOA ...........................191 6.5 Business activities ...................................193 6.5.1 Business activity protocols .............................194 6.5.2 The business activity coordinator ........................195 6.5.3 Business activity states ................................195 6.5.4 Business activities and atomic transactions ................196 6.5.5 Business activities and SOA ............................197 6.6 Orchestration .......................................200 6.6.1 Business protocols and process definition .................203 6.6.2 Process services and partner services ....................203 6.6.3 Basic activities and structured activities ...................204 6.6.4 Sequences, flows, and links ............................204 6.6.5 Orchestrations and activities ............................205 6.6.6 Orchestration and coordination ..........................205 6.6.7 Orchestration and SOA ................................205 6.7 Choreography ......................................208 6.7.1 Collaboration ........................................209 6.7.2 Roles and participants .................................210 6.7.3 Relationships and channels .............................210 6.7.4 Interactions and work units .............................210 6.7.5 Reusability, composability, and modularity .................210 6.7.6 Orchestrations and choreographies ......................211 6.7.7 Choreography and SOA ...............................212 Contents XV Chapter 7 Web Services and Contemporary SOA (Part II: Advanced Messaging, Metadata, and Security) 217 7.1 Addressing .........................................220 7.1.1 Endpoint references ..................................222 7.1.2 Message information headers ...........................223 7.1.3 Addressing and transport protocol independence ............225 7.1.4 Addressing and SOA ..................................225 7.2 Reliable messaging ..................................228 7.2.1 RM Source, RM Destination, Application Source, and Application Destination .............................230 7.2.2 Sequences ..........................................230 7.2.3 Acknowledgements ...................................231 7.2.4 Delivery assurances ..................................233 7.2.5 Reliable messaging and addressing ......................235 7.2.6 Reliable messaging and SOA ...........................235 7.3 Correlation .........................................238 7.3.1 Correlation in abstract .................................239 7.3.2 Correlation in MEPs and activities ........................239 7.3.3 Correlation in coordination ..............................240 7.3.4 Correlation in orchestration .............................240 7.3.5 Correlation in addressing ...............................240 7.3.6 Correlation in reliable messaging ........................240 7.3.7 Correlation and SOA ..................................241 7.4 Policies ............................................242 7.4.1 The WS-Policy framework ..............................243 7.4.2 Policy assertions and policy alternatives ...................244 7.4.3 Policy assertion types and policy vocabularies ..............245 7.4.4 Policy subjects and policy scopes ........................245 7.4.5 Policy expressions and policy attachments .................245 7.4.6 What you really need to know ...........................245 7.4.7 Policies in coordination ................................246 7.4.8 Policies in orchestration and choreography .................246 7.4.9 Policies in reliable messaging ...........................246 7.4.10 Policies and SOA .....................................246 xvi Contents 7.5 Metadata exchange ..................................248 7.5.1 The WS-MetadataExchange specification ..................249 7.5.2 Get Metadata request and response messages .............250 7.5.3 Get request and response messages .....................251 7.5.4 Selective retrieval of metadata ..........................252 7.5.5 Metadata exchange and service description discovery ........252 7.5.6 Metadata exchange and version control ...................253 7.5.7 Metadata exchange and SOA ...........................254 7.6 Security ...........................................257 7.6.1 Identification, authentication, and authorization .............259 7.6.2 Single sign-on .......................................260 7.6.3 Confidentiality and integrity .............................261 7.6.4 Transport-level security and message-level security ..........262 7.6.5 Encryption and digital signatures ........................263 7.6.6 Security and SOA ....................................265 7.7 Notification and eventing ..............................266 7.7.1 Publish-and-subscribe in abstract ........................267 7.7.2 One concept, two specifications .........................268 7.7.3 The WS-Notification Framework .........................268 7.7.4 The WS-Eventing specification ..........................271 7.7.5 WS-Notification and WS-Eventing ........................274 7.7.6 Notification, eventing, and SOA ..........................274 Part Hi SOA and Service-Orientation 277 Chapter 8 Principles of Service-Orientation 279 8.1 Service-orientation and the enterprise ....................280 8.2 Anatomy of a service-oriented architecture ................284 8.2.1 Logical components of the Web services framework .........284 8.2.2 Logical components of automation logic ...................285 8.2.3 Components of an SOA ................................288 8.2.4 How components in an SOA inter-relate ...................289 Contents xvii 8.3 Common principles of service-orientation .................290 8.3.1 Services are reusable .................................292 8.3.2 Services share a formal contract .........................295 8.3.3 Services are loosely coupled ............................297 8.3.4 Services abstract underlying logic ........................298 8.3.5 Services are composable ..............................301 8.3.6 Services are autonomous ..............................303 8.3.7 Services are stateless .................................307 8.3.8 Services are discoverable ..............................309 8.4 How service-orientation principles inter-relate ..............311 8.4.1 Service reusability ....................................312 8.4.2 Service contract ......................................313 8.4.3 Service loose coupling ................................315 8.4.4 Service abstraction ...................................316 8.4.5 Service composability .................................317 8.4.6 Service autonomy ....................................318 8.4.7 Service statelessness .................................319 8.4.8 Service discoverability .................................320 8.5 Service-orientation and object-orientation (Part II) ..........321 8.6 Native Web service support for service-orientation principles .. 324 Chapter 9 Service Layers 327 9.1 Service-orientation and contemporary SOA ...............328 9.1.1 Mapping the origins and supporting sources of concrete SOA characteristics ...................................329 9.1.2 Unsupported SOA characteristics ........................332 9.2 Service layer abstraction ..............................333 9.2.1 Problems solved by layering services .....................334 9.3 Application service layer ..............................337 9.4 Business service layer ................................341 9.5 Orchestration service layer ............................344 9.6 Agnostic services ....................................346 9.7 Service layer configuration scenarios ....................347 9.7.1 Scenario #1: Hybrid application services only ............... 348 9.7.2 Scenario #2: Hybrid and utility application services ___......349 Contents 9.7.3 Scenario #3: Task-centric business services and utility application services ...................................349 9.7.4 Scenario #4: Task-centric business services, entity-centric business services, and utility application services ...........350 9.7.5 Scenario #5: Process services, hybrid application services, and utility application services ...........................350 9.7.6 Scenario #6: Process services, task-centric business services, and utility application services ...................351 9.7.7 Scenario #7: Process services, task-centric business services, entity-centric business services, and utility application services ...................................352 9.7.8 Scenario #8: Process services, entity-centric business services, and utility application services ...................352 Part IV Building SOA (Planning and Analysis) 355 Chapter 1O SOA Delivery Strategies 357 10.1 SOA delivery lifecycle phases ..........................358 10.1.1 Basic phases of the SOA delivery lifecycle .................358 10.1.2 Service-oriented analysis ..............................359 10.1.3 Service-oriented design ................................359 10.1.4 Service development ..................................360 10.1.5 Service testing .......................................360 10.1.6 Service deployment ...................................361 10.1.7 Service administration .................................361 10.1.8 SOA delivery strategies ................................362 10.2 The top-down strategy ................................363 10.2.1 Process ............................................363 10.2.2 Pros and cons .......................................365 10.3 The bottom-up strategy ____...........................366 10.3.1 Process ............................................367 10.3.2 Pros and cons .......................................368 10.4 The agile strategy ...................................370 10.4.1 Process ............................................370 10.4.2 Pros and cons .......................................373 Contents ХІХ Chapter 11 Service-Oriented Analysis (Part I: Introduction) 375 11.1 Introduction to service-oriented analysis ..................377 11.1.1 Objectives of service-oriented analysis ....................377 11.1.2 The service-oriented analysis process ....................377 11.2 Benefits of a business-centric SOA ......................382 11.2.1 Business services build agility into business models .........383 11.2.2 Business services prepare a process for orchestration ........384 11.2.3 Business services enable reuse .........................384 11.2.4 Only business services can realize the service-oriented enterprise .............................385 11.3 Deriving business services ............................386 11.3.1 Sources from which business services can be derived ........387 11.3.2 Types of derived business services .......................392 11.3.3 Business services and orchestration ......................395 Chapter 12 Service-Oriented Analysis (Part II: Service Modeling) 397 12.1 Service modeling (a step-by-step process) ................398 12.1.1 Services versus Service Candidates ...................398 12.1.2 Process description ...................................399 12.2 Service modeling guidelines ...........................416 12.2.1 Take into account potential cross-process reusability of logic being encapsulated (task-centric business service candidates) ...................................416 12.2.2 Consider potential intra-process reusability of logic being encapsulated (task-centric business service candidates) .................417 12.2.3 Factor in process-related dependencies (task-centric business service candidates) ...........................417 12.2.4 Model for cross-application reuse (application service candidates) ...................................418 12.2.5 Speculate on further decomposition requirements ...........418 12.2.6 Identify logical units of work with explicit boundaries .........419 12.2.7 Prevent logic boundary creep ...........................419 12.2.8 Emulate process services when not using orchestration (task-centric business service candidates) .................420 XX Contents 12.2.9 Target a balanced model ...............................421 12.2.10 Classify service modeling logic ..........................422 12.2.11 Allocate appropriate modeling resources ..................422 12.2.12 Create and publish business service modeling standards .....422 12.3 Classifying service model logic .........................423 12.3.1 The SOE model ......................................424 12.3.2 The enterprise business model ..........................426 12.3.3 Building Blocks versus Service Models ..................426 12.3.4 Basic modeling building blocks ..........................426 12.4 Contrasting service modeling approaches (an example) ......430 Part V Building SOA (Technology and Design) 445 Chapter 13 Service-Oriented Design (Part I: Introduction) 447 13.1 Introduction to service-oriented design ...................448 13.1.1 Objectives of service-oriented design .....................448 13.1.2 Design standards versus Industry standards .............449 13.1.3 The service-oriented design process .....................449 13.1.4 Prerequisites ........................................451 13.2 WSDL-related XML Schema language basics ..............453 13.2.1 The schema element ..................................454 13.2.2 The element element ................................455 13.2.3 The eomplexType and simpleType elements ............455 13.2.4 The import and include elements .....................456 13.2.5 Other important elements ..............................456 13.3 WSDL language basics ...............................457 13.3.1 The definitions element ............................458 13.3.2 The types element ...................................459 13.3.3 The message and part elements .......................461 13.3.4 The portType, interface, and operation elements ......462 13.3.5 The input and output elements (when used With operation) .....................................462 Contents XXI 13.3.6 The binding element ................................463 13.3.7 The input and output elements (when used with binding) .464 13.3.8 The service, port, and endpoint elements .............465 13.3.9 The import element ..................................465 13.3.10 The documentation element ..........................466 13.4 SOAP language basics ...............................466 13.4.1 The Envelope element ...............................468 13.4.2 The Header element ..................................468 13.4.3 The Body element ....................................468 13.4.4 The Fault element ...................................470 13.5 Service interface design tools ..........................471 13.5.1 Auto-generation ......................................471 13.5.2 Design tools .........................................472 13.5.3 Hand coding ........................................473 Chapter 14 Service-Oriented Design (Part II: SOA Composition Guidelines) 475 14.1 Steps to composing SOA ..............................476 14.1.1 Step 1: Choose service layers ...........................478 14.1.2 Step 2: Position core standards ..........................478 14.1.3 Step 3: Choose SOA extensions .........................478 14.2 Considerations for choosing service layers ................478 14.3 Considerations for positioning core SOA standards .........481 14.3.1 Industry standards and SOA ............................481 14.3.2 XML and SOA .......................................482 14.3.3 The WS-I Basic Profile ................................. 483 14.3.4 WSDL and SOA ......................................485 14.3.5 XML Schema and SOA ................................485 14.3.6 SOAP and SOA ......................................486 14.3.7 Namespaces and SOA ................................487 14.3.8 UDDI and SOA ......................................488 14.4 Considerations for choosing SOA extensions ..............490 14.4.1 Choosing SOA characteristics ...........................490 14.4.2 Choosing WS-* specifications ...........................491 14.4.3 WS-BPEL and SOA ...................................492 Contents Chapter 15 Service-Oriented Design (Part III: Service Design) 495 15.1 Service design overview ..............................497 15.1.1 Design standards .....................................498 15.1.2 About the process descriptions ..........................498 15.1.3 Prerequisites ........................................499 15.2 Entity-centric business service design (a step-by-step process) ........................................... 501 15.2.1 Process description ...................................502 15.3 Application service design (a step-by-step process) .........522 15.3.1 Process description ...................................523 15.4 Task-centric business service design (a step-by-step process) ...........................................540 15.4.1 Process description ...................................540 15.5 Service design guidelines .............................555 15.5.1 Apply naming standards ...............................555 15.5.2 Apply a suitable level of interface granularity ................556 15.5.3 Design service operations to be inherently extensible ........558 15.5.4 Identify known and potential service requestors .............559 15.5.5 Consider using modular WSDL documents .................559 15.5.6 Use namespaces carefully .............................560 15.5.7 Use the SOAP document and literal attribute values ..........561 15.5.8 Use WS-I Profiles even if WS-I compliance isn t required ......563 15.5.9 Document services with metadata .......................563 Chapter 16 Service-Oriented Design (Part IV: Business Process Design) 565 16.1 WS-BPEL language basics ............................566 16.1.1 A brief history of BPEL4WS and WS-BPEL ................567 16.1.2 Prerequisites ........................................568 16.1.3 The process element ................................568 16.1.4 The partnerLinks and partnerLink elements ..........569 16.1.5 The partnerldnkType element ........................570 16.1.6 The variables element ..............................571 16.1.7 The getVariableProperty and getVariableData functions ...........................572 Contents xxiii 16.1.8 The sequence element ...............................573 16.1.9 The invoke element ..................................574 16.1.10 The receive element ................................575 16.1.11 The reply element ...................................576 16.1.12 The switch, case, and otherwise elements .............577 16.1.13 The assign, copy, from, and to elements ...............577 16.1.14 f aultHandlers, catch, and catchAll elements .........578 16.1.15 Other WS-BPEL elements ..............................579 16.2 WS-Coordination overview .............................581 16.2.1 The CoordinationContext element ....................582 16.2.2 The Identifier and Expires elements .................583 16.2.3 The CoordinationType element .......................583 16.2.4 The RegistrationService element ....................583 16.2.5 Designating the WS-BusinessActivity coordination type .......584 16.2.6 Designating the WS-AtomicTransaction coordination type .....584 16.3 Service-oriented business process design (a step-by-step process) ...........................................585 16.3.1 Process description ...................................586 Chapter 17 Fundamental WS-* Extensions віз You mustUnderstand this .......................................614 17.1 WS-Addressing language basics ........................615 17.1.1 The EndpointReference element ...................... 616 17.1.2 Message information header elements ....................617 17.1.3 WS-Addressing reusability .............................620 17.2 WS-ReliableMessaging language basics ..................622 17.2.1 The Sequence, MessageNumber, and LastMessage elements ...............................623 17.2.2 The SequenceAcknowledgement and AcknowledgementRange elements .....................625 17.2.3 The Nack element ....................................626 17.2.4 The AckRequested element ...........................627 17.2.5 Other WS-ReliableMessaging elements ...................628 17.3 WS-PoIicy language basics ............................629 17.3.1 The Policy element and common policy assertions ......... 630 17.3.2 The ExactlyOne element .............................631 xxiv Contents 17.3.3 The All element .....................................632 17.3.4 The Usage attribute ...................................633 17.3.5 The Preference attribute .............................633 17.3.6 The PolicyRef erence element ........................633 17.3.7 The PolicyURls attribute .............................634 17.3.8 The PolicyAttachment element .......................635 17.3.9 Additional types of policy assertions ......................635 17.4 WS-MetadataExchange language basics ..........·.......636 17.4.1 The GetMetadata element ............................637 17.4.2 The Dialect element ................................638 17.4.3 The identifier element ............................639 17.4.4 The Metadata, MetadataSection, and MetadataRef erence elements ........................640 17.4.5 The Get message ....................................641 17.5 WS-Security language basics ..........................642 17.5.1 The Security element (WS-Security) ....................644 17.5.2 The UsernameToken, Username, and Password elements (WS-Security) .......................................644 17.5.3 The BinarySecurityToken element (WS-Security) ........644 17.5.4 The SecurityTokenRef erence element (WS-Security) .....644 17.5.5 Composing Security element contents (WS-Security) ......645 17.5.6 The EncryptedData element (XML-Encryption) ...........646 17.5.7 The CipherData, CipherValue, and CipherRef erence elements (XML-Encryption) .............................647 17.5.8 XML-Signature elements ...............................648 Chapter 18 SOA Platforms esi 18.1 SOA platform basics .................................652 18.1.1 Basic platform building blocks ...........................653 18.1.2 Common SOA platform layers ...........................654 18.1.3 Relationship between SOA layers and technologies .........655 18.1.4 Fundamental service technology architecture ...............656 18.1.5 Vendor platforms .....................................667 18.2 SOA support in J2EE .................................668 18.2.1 Platform overview ....................................668 18.2.2 Primitive SOA support .................................681 Contents XXV 18.2.3 Support for service-orientation principles ..................682 18.2.4 Contemporary SOA support ............................683 18.3 SOA support in .NET .................................688 18.3.1 Platform overview ....................................688 18.3.2 Primitive SOA support .................................697 18.3.3 Support for service-orientation principles ..................698 18.3.4 Contemporary SOA support ............................700 18.4 Integration considerations .............................703 Appendix A Case Studies: Conclusion 707 A.1 RaiiCo Ltd ..........................................708 A.2 Transit Line Systems Inc ...............................711 A.3 The Oasis Car Wash .................................715 Appendix В Service Models Reference 717 About the Author 721 About SOA Systems 723 About the Photographs 725 Index 727 The foremost how-to guide to SOA from the world s top-selling SOA author Service-Oriented Architecture (SOA) is at the heart of a revolutionary computing platform that is being adopted world-wide and has earned the support of every major software provider. This new book by Thomas Eri (author of the international best-seller Service-Oriented Architecture: A Field Guide to Integrating XML and Web Services) provides a comprehensive, end-to-end tutorial for SOA, Web services, and service-orientation. Eri uses more than 125 case study examples and over 300 diagrams to illuminate the most important facets of building SOA platforms: goals, obstacles, concepts, technologies, standards, delivery strategies, and processes for analysis and design. His book s broad coverage includes • Detailed step-by-step processes for service-oriented analysis and service-oriented design • An in-depth exploration of service-orientation as a distinct design paradigm, including a comparison to object-orientation • A comprehensive study of SOA support in .NET and J2EE development and runtime platforms • Descriptions of over a dozen key Web services technologies and WS-* specifications, including explanations of how they interrelate and how they are positioned within SOA • The use of In Plain English sections, which describe complex concepts through non-technical analogies • Guidelines for service-oriented business modeling ani the creation of specialized service abstraction layers • A study contrasting past architectures with SOA and reviewing current industry influences • Project planning and the comparison of different SOA deljvery strategies The goal of this book is to help you attain a solid understanding of what constitutes contemporary SOA along with step-by-step guidance for realizing its successful implementation.
adam_txt	Preface XXVII Chapter I Introduction ι 1.1 Why this book is important .2 1.1.1 The false SOA .2 1.1.2 The ideal SOA .3 1.1.3 The real SOA .4 1.2 Objectives of this book .4 1.2.1 Understanding SOA, service-orientation, and Web services .5 1.2.2 Learning how to build SOA with Web services .5 1.3 Who this book is for .6 1.4 What this book does not cover .6 1.5 How this book is organized .7 1.5.1 Part I: SOA and Web Services Fundamentals .8 1.5.2 Part II: SOA and WS-* Extensions .10 1.5.3 Part III: SOA and Service-Orientation .13 1.5.4 Part IV: Building SOA (Planning and Analysis) .14 1.5.5 Part V: Building SOA (Technology and Design) .16 1.5.6 Conventions .19 1.6 Additional information .19 1.6.1 The XML & Web Services Integration Framework (XWIF) .19 1.6.2 www.soabooks.com .20 1.6.3 Contact the Author .20 x Contents Chapter S. Case Studies 21 2.1 How case studies are used .22 2.1.1 Style characteristics .22 2.1.2 Relationship to abstract content .22 2.1.3 Code samples .23 2.2 Case #1 background: RaiiCo Ltd .23 2.2.1 History .23 2.2.2 Technical infrastructure .23 2.2.3 Automation solutions .24 2.2.4 Business goals and obstacles .24 2.3 Case #2 background: Transit Line Systems Inc .25 2.3.1 History .26 2.3.2 Technical infrastructure .26 2.3.3 Automation solutions .27 2.3.4 Business goals and obstacles .27 Part ł SOA and Web Services Fundamentals 29 Chapter 3 Introducing SOA зі 3.1 Fundamental SOA. 32 3.1.1 A service-oriented analogy .32 3.1.2 How services encapsulate logic .33 3.1.3 How services relate .35 3.1.4 How services communicate .35 3.1.5 How services are designed .36 3.1.6 How services are built .37 3.1.7 Primitive SOA .38 3.2 Common characteristics of contemporary SOA .40 3.2.1 Contemporary SOA is at the core of the service-oriented computing platform .41 3.2.2 Contemporary SOA increases quality of service .42 Contents xi 3.2.3 Contemporary SOA is fundamentally autonomous .42 3.2.4 Contemporary SOA ¡s based on open standards .43 3.2.5 Contemporary SOA supports vendor diversity .43 3.2.6 Contemporary SOA promotes discovery .44 3.2.7 Contemporary SOA fosters intrinsic interoperability .45 3.2.8 Contemporary SOA promotes federation .45 3.2.9 Contemporary SOA promotes architectural composability .46 3.2.10 Contemporary SOA fosters inherent reusability .47 3.2.11 Contemporary SOA emphasizes extensibility .48 3.2.12 Contemporary SOA supports a service-oriented business modeling paradigm .48 3.2.13 Contemporary SOA implements layers of abstraction .49 3.2.14 Contemporary SOA promotes loose coupling throughout the enterprise .50 3.2.15 Contemporary SOA promotes organizational agility .51 3.2.16 Contemporary SOA is a building block .52 3.2.17 Contemporary SOA is an evolution .53 3.2.18 Contemporary SOA is still maturing .53 3.2.19 Contemporary SOA is an achievable ideal .53 3.2.20 Defining SOA .54 3.2.21 Separating concrete characteristics .55 3.3 Common misperceptions about SOA .56 3.3.1 "An application that uses Web services is service-oriented." .56 3.3.2 "SOA is just a marketing term used to re-brand Web services." . 57 3.3.3 "SOA is just a marketing term used to re-brand distributed computing with Web services." .57 3.3.4 "SOA simplifies distributed computing." .57 3.3.5 "An application with Web services that uses WS-* extensions is service-oriented." .58 3.3.6 "If you understand Web services you won't have a problem building SOA." .58 3.3.7 Once you go SOA, everything becomes interoperable." .59 3.4 Common tangible benefits of SOA .59 3.4.1 Improved integration (and intrinsic interoperability) .60 3.4.2 Inherent reuse .60 3.4.3 Streamlined architectures and solutions .61 3.4.4 Leveraging the legacy investment .61 3.4.5 Establishing standardized XML data representation .62 XU Contents 3.4.6 Focused investment on communications infrastructure .63 3.4.7 "Best-of-breed" alternatives .63 3.4.8 Organizational agility .63 3.5 Common pitfalls of adopting SOA .64 3.5.1 Building service-oriented architectures like traditional distributed architectures .65 3.5.2 Not standardizing SOA .65 3.5.3 Not creating a transition plan .66 3.5.4 Not starting with an XML foundation architecture .67 3.5.5 Not understanding SOA performance requirements .67 3.5.6 Not understanding Web services security .68 3.5.7 Not keeping in touch with product platforms and standards development .69 Chapter 4 The Evolution of SOA 71 4.1 An SOA timeline (from XML to Web services to SOA) .72 4.1.1 XML: a brief history .72 4.1.2 Web services: a brief history .73 4.1.3 SOA: a brief history .74 4.1.4 How SOA is re-shaping XML and Web services .76 4.2 The continuing evolution of SOA (standards organizations and contributing vendors) .78 4.2.1 "Standards" vs. "Specifications" vs. "Extensions" .78 4.2.2 Standards organizations that contribute to SOA .79 4.2.3 Major vendors that contribute to SOA .82 4.3 The roots of SOA (comparing SOA to past architectures) .86 4.3.1 What is architecture? .86 4.3.2 SOA vs. client-server architecture .88 4.3.3 SOA vs. distributed Internet architecture .95 4.3.4 SOA vs. hybrid Web service architecture .104 4.3.5 Service-orientation and object-orientation (Part 1).107 Contents Xiii Chapter 5 Web Services and Primitive SOA 109 5.1 The Web services framework.Ill 5.2 Services (as Web services) .112 5.2.1 Service roles .114 5.2.2 Service models .126 5.3 Service descriptions (with WSDL) .131 5.3.1 Service endpoints and service descriptions .133 5.3.2 Abstract description .134 5.3.3 Concrete description .135 5.3.4 Metadata and service contracts .136 5.3.5 Semantic descriptions .137 5.3.6 Service description advertisement and discovery .138 5.4 Messaging (with SOAP) .142 5.4.1 Messages .143 5.4.2 Nodes .149 5.4.3 Message paths .152 Part II SOA and WS-* Extensions 155 What is "WS-"? .157 Chapter 6 Web Services and Contemporary SOA (Part I: Activity Management and Composition) 159 6.1 Message exchange patterns .162 6.1.1 Primitive MEPs .163 6.1.2 MEPs and SOAP .169 6.1.3 MEPs and WSDL .169 6.1.4 MEPs and SOA .171 6.2 Service activity .172 6.2.1 Primitive and complex service activities .174 6.2.2 Service activities and SOA .175 xiv Contents 6.3 Coordination .177 6.3.1 Coordinator composition .179 6.3.2 Coordination types and coordination protocols .180 6.3.3 Coordination contexts and coordination participants .180 6.3.5 The activation and registration process .181 6.3.5 The completion process .182 6.3.6 Coordination and SOA .183 6.4 Atomic transactions .186 6.4.1 ACID transactions .187 6.4.2 Atomic transaction protocols .188 6.4.3 The atomic transaction coordinator .188 6.4.4 The atomic transaction process .189 6.4.5 Atomic transactions and SOA .191 6.5 Business activities .193 6.5.1 Business activity protocols .194 6.5.2 The business activity coordinator .195 6.5.3 Business activity states .195 6.5.4 Business activities and atomic transactions .196 6.5.5 Business activities and SOA .197 6.6 Orchestration .200 6.6.1 Business protocols and process definition .203 6.6.2 Process services and partner services .203 6.6.3 Basic activities and structured activities .204 6.6.4 Sequences, flows, and links .204 6.6.5 Orchestrations and activities .205 6.6.6 Orchestration and coordination .205 6.6.7 Orchestration and SOA .205 6.7 Choreography .208 6.7.1 Collaboration .209 6.7.2 Roles and participants .210 6.7.3 Relationships and channels .210 6.7.4 Interactions and work units .210 6.7.5 Reusability, composability, and modularity .210 6.7.6 Orchestrations and choreographies .211 6.7.7 Choreography and SOA .212 Contents XV Chapter 7 Web Services and Contemporary SOA (Part II: Advanced Messaging, Metadata, and Security) 217 7.1 Addressing .220 7.1.1 Endpoint references .222 7.1.2 Message information headers .223 7.1.3 Addressing and transport protocol independence .225 7.1.4 Addressing and SOA .225 7.2 Reliable messaging .228 7.2.1 RM Source, RM Destination, Application Source, and Application Destination .230 7.2.2 Sequences .230 7.2.3 Acknowledgements .231 7.2.4 Delivery assurances .233 7.2.5 Reliable messaging and addressing .235 7.2.6 Reliable messaging and SOA .235 7.3 Correlation .238 7.3.1 Correlation in abstract .239 7.3.2 Correlation in MEPs and activities .239 7.3.3 Correlation in coordination .240 7.3.4 Correlation in orchestration .240 7.3.5 Correlation in addressing .240 7.3.6 Correlation in reliable messaging .240 7.3.7 Correlation and SOA .241 7.4 Policies .242 7.4.1 The WS-Policy framework .243 7.4.2 Policy assertions and policy alternatives .244 7.4.3 Policy assertion types and policy vocabularies .245 7.4.4 Policy subjects and policy scopes .245 7.4.5 Policy expressions and policy attachments .245 7.4.6 What you really need to know .245 7.4.7 Policies in coordination .246 7.4.8 Policies in orchestration and choreography .246 7.4.9 Policies in reliable messaging .246 7.4.10 Policies and SOA .246 xvi Contents 7.5 Metadata exchange .248 7.5.1 The WS-MetadataExchange specification .249 7.5.2 Get Metadata request and response messages .250 7.5.3 Get request and response messages .251 7.5.4 Selective retrieval of metadata .252 7.5.5 Metadata exchange and service description discovery .252 7.5.6 Metadata exchange and version control .253 7.5.7 Metadata exchange and SOA .254 7.6 Security .257 7.6.1 Identification, authentication, and authorization .259 7.6.2 Single sign-on .260 7.6.3 Confidentiality and integrity .261 7.6.4 Transport-level security and message-level security .262 7.6.5 Encryption and digital signatures .263 7.6.6 Security and SOA .265 7.7 Notification and eventing .266 7.7.1 Publish-and-subscribe in abstract .267 7.7.2 One concept, two specifications .268 7.7.3 The WS-Notification Framework .268 7.7.4 The WS-Eventing specification .271 7.7.5 WS-Notification and WS-Eventing .274 7.7.6 Notification, eventing, and SOA .274 Part Hi SOA and Service-Orientation 277 Chapter 8 Principles of Service-Orientation 279 8.1 Service-orientation and the enterprise .280 8.2 Anatomy of a service-oriented architecture .284 8.2.1 Logical components of the Web services framework .284 8.2.2 Logical components of automation logic .285 8.2.3 Components of an SOA .288 8.2.4 How components in an SOA inter-relate .289 Contents xvii 8.3 Common principles of service-orientation .290 8.3.1 Services are reusable .292 8.3.2 Services share a formal contract .295 8.3.3 Services are loosely coupled .297 8.3.4 Services abstract underlying logic .298 8.3.5 Services are composable .301 8.3.6 Services are autonomous .303 8.3.7 Services are stateless .307 8.3.8 Services are discoverable .309 8.4 How service-orientation principles inter-relate .311 8.4.1 Service reusability .312 8.4.2 Service contract .313 8.4.3 Service loose coupling .315 8.4.4 Service abstraction .316 8.4.5 Service composability .317 8.4.6 Service autonomy .318 8.4.7 Service statelessness .319 8.4.8 Service discoverability .320 8.5 Service-orientation and object-orientation (Part II) .321 8.6 Native Web service support for service-orientation principles . 324 Chapter 9 Service Layers 327 9.1 Service-orientation and contemporary SOA .328 9.1.1 Mapping the origins and supporting sources of concrete SOA characteristics .329 9.1.2 Unsupported SOA characteristics .332 9.2 Service layer abstraction .333 9.2.1 Problems solved by layering services .334 9.3 Application service layer .337 9.4 Business service layer .341 9.5 Orchestration service layer .344 9.6 Agnostic services .346 9.7 Service layer configuration scenarios .347 9.7.1 Scenario #1: Hybrid application services only . 348 9.7.2 Scenario #2: Hybrid and utility application services _.349 Contents 9.7.3 Scenario #3: Task-centric business services and utility application services .349 9.7.4 Scenario #4: Task-centric business services, entity-centric business services, and utility application services .350 9.7.5 Scenario #5: Process services, hybrid application services, and utility application services .350 9.7.6 Scenario #6: Process services, task-centric business services, and utility application services .351 9.7.7 Scenario #7: Process services, task-centric business services, entity-centric business services, and utility application services .352 9.7.8 Scenario #8: Process services, entity-centric business services, and utility application services .352 Part IV Building SOA (Planning and Analysis) 355 Chapter 1O SOA Delivery Strategies 357 10.1 SOA delivery lifecycle phases .358 10.1.1 Basic phases of the SOA delivery lifecycle .358 10.1.2 Service-oriented analysis .359 10.1.3 Service-oriented design .359 10.1.4 Service development .360 10.1.5 Service testing .360 10.1.6 Service deployment .361 10.1.7 Service administration .361 10.1.8 SOA delivery strategies .362 10.2 The top-down strategy .363 10.2.1 Process .363 10.2.2 Pros and cons .365 10.3 The bottom-up strategy _.366 10.3.1 Process .367 10.3.2 Pros and cons .368 10.4 The agile strategy .370 10.4.1 Process .370 10.4.2 Pros and cons .373 Contents ХІХ Chapter 11 Service-Oriented Analysis (Part I: Introduction) 375 11.1 Introduction to service-oriented analysis .377 11.1.1 Objectives of service-oriented analysis .377 11.1.2 The service-oriented analysis process .377 11.2 Benefits of a business-centric SOA .382 11.2.1 Business services build agility into business models .383 11.2.2 Business services prepare a process for orchestration .384 11.2.3 Business services enable reuse .384 11.2.4 Only business services can realize the service-oriented enterprise .385 11.3 Deriving business services .386 11.3.1 Sources from which business services can be derived .387 11.3.2 Types of derived business services .392 11.3.3 Business services and orchestration .395 Chapter 12 Service-Oriented Analysis (Part II: Service Modeling) 397 12.1 Service modeling (a step-by-step process) .398 12.1.1 "Services" versus "Service Candidates" .398 12.1.2 Process description .399 12.2 Service modeling guidelines .416 12.2.1 Take into account potential cross-process reusability of logic being encapsulated (task-centric business service candidates) .416 12.2.2 Consider potential intra-process reusability of logic being encapsulated (task-centric business service candidates) .417 12.2.3 Factor in process-related dependencies (task-centric business service candidates) .417 12.2.4 Model for cross-application reuse (application service candidates) .418 12.2.5 Speculate on further decomposition requirements .418 12.2.6 Identify logical units of work with explicit boundaries .419 12.2.7 Prevent logic boundary creep .419 12.2.8 Emulate process services when not using orchestration (task-centric business service candidates) .420 XX Contents 12.2.9 Target a balanced model .421 12.2.10 Classify service modeling logic .422 12.2.11 Allocate appropriate modeling resources .422 12.2.12 Create and publish business service modeling standards .422 12.3 Classifying service model logic .423 12.3.1 The SOE model .424 12.3.2 The enterprise business model .426 12.3.3 "Building Blocks" versus "Service Models" .426 12.3.4 Basic modeling building blocks .426 12.4 Contrasting service modeling approaches (an example) .430 Part V Building SOA (Technology and Design) 445 Chapter 13 Service-Oriented Design (Part I: Introduction) 447 13.1 Introduction to service-oriented design .448 13.1.1 Objectives of service-oriented design .448 13.1.2 "Design standards" versus "Industry standards" .449 13.1.3 The service-oriented design process .449 13.1.4 Prerequisites .451 13.2 WSDL-related XML Schema language basics .453 13.2.1 The schema element .454 13.2.2 The element element .455 13.2.3 The eomplexType and simpleType elements .455 13.2.4 The import and include elements .456 13.2.5 Other important elements .456 13.3 WSDL language basics .457 13.3.1 The definitions element .458 13.3.2 The types element .459 13.3.3 The message and part elements .461 13.3.4 The portType, interface, and operation elements .462 13.3.5 The input and output elements (when used With operation) .462 Contents XXI 13.3.6 The binding element .463 13.3.7 The input and output elements (when used with binding) .464 13.3.8 The service, port, and endpoint elements .465 13.3.9 The import element .465 13.3.10 The documentation element .466 13.4 SOAP language basics .466 13.4.1 The Envelope element .468 13.4.2 The Header element .468 13.4.3 The Body element .468 13.4.4 The Fault element .470 13.5 Service interface design tools .471 13.5.1 Auto-generation .471 13.5.2 Design tools .472 13.5.3 Hand coding .473 Chapter 14 Service-Oriented Design (Part II: SOA Composition Guidelines) 475 14.1 Steps to composing SOA .476 14.1.1 Step 1: Choose service layers .478 14.1.2 Step 2: Position core standards .478 14.1.3 Step 3: Choose SOA extensions .478 14.2 Considerations for choosing service layers .478 14.3 Considerations for positioning core SOA standards .481 14.3.1 Industry standards and SOA .481 14.3.2 XML and SOA .482 14.3.3 The WS-I Basic Profile . 483 14.3.4 WSDL and SOA .485 14.3.5 XML Schema and SOA .485 14.3.6 SOAP and SOA .486 14.3.7 Namespaces and SOA .487 14.3.8 UDDI and SOA .488 14.4 Considerations for choosing SOA extensions .490 14.4.1 Choosing SOA characteristics .490 14.4.2 Choosing WS- specifications .491 14.4.3 WS-BPEL and SOA .492 Contents Chapter 15 Service-Oriented Design (Part III: Service Design) 495 15.1 Service design overview .497 15.1.1 Design standards .498 15.1.2 About the process descriptions .498 15.1.3 Prerequisites .499 15.2 Entity-centric business service design (a step-by-step process) . 501 15.2.1 Process description .502 15.3 Application service design (a step-by-step process) .522 15.3.1 Process description .523 15.4 Task-centric business service design (a step-by-step process) .540 15.4.1 Process description .540 15.5 Service design guidelines .555 15.5.1 Apply naming standards .555 15.5.2 Apply a suitable level of interface granularity .556 15.5.3 Design service operations to be inherently extensible .558 15.5.4 Identify known and potential service requestors .559 15.5.5 Consider using modular WSDL documents .559 15.5.6 Use namespaces carefully .560 15.5.7 Use the SOAP document and literal attribute values .561 15.5.8 Use WS-I Profiles even if WS-I compliance isn't required .563 15.5.9 Document services with metadata .563 Chapter 16 Service-Oriented Design (Part IV: Business Process Design) 565 16.1 WS-BPEL language basics .566 16.1.1 A brief history of BPEL4WS and WS-BPEL .567 16.1.2 Prerequisites .568 16.1.3 The process element .568 16.1.4 The partnerLinks and partnerLink elements .569 16.1.5 The partnerldnkType element .570 16.1.6 The variables element .571 16.1.7 The getVariableProperty and getVariableData functions .572 Contents xxiii 16.1.8 The sequence element .573 16.1.9 The invoke element .574 16.1.10 The receive element .575 16.1.11 The reply element .576 16.1.12 The switch, case, and otherwise elements .577 16.1.13 The assign, copy, from, and to elements .577 16.1.14 f aultHandlers, catch, and catchAll elements .578 16.1.15 Other WS-BPEL elements .579 16.2 WS-Coordination overview .581 16.2.1 The CoordinationContext element .582 16.2.2 The Identifier and Expires elements .583 16.2.3 The CoordinationType element .583 16.2.4 The RegistrationService element .583 16.2.5 Designating the WS-BusinessActivity coordination type .584 16.2.6 Designating the WS-AtomicTransaction coordination type .584 16.3 Service-oriented business process design (a step-by-step process) .585 16.3.1 Process description .586 Chapter 17 Fundamental WS-* Extensions віз You mustUnderstand this .614 17.1 WS-Addressing language basics .615 17.1.1 The EndpointReference element . 616 17.1.2 Message information header elements .617 17.1.3 WS-Addressing reusability .620 17.2 WS-ReliableMessaging language basics .622 17.2.1 The Sequence, MessageNumber, and LastMessage elements .623 17.2.2 The SequenceAcknowledgement and AcknowledgementRange elements .625 17.2.3 The Nack element .626 17.2.4 The AckRequested element .627 17.2.5 Other WS-ReliableMessaging elements .628 17.3 WS-PoIicy language basics .629 17.3.1 The Policy element and common policy assertions . 630 17.3.2 The ExactlyOne element .631 xxiv Contents 17.3.3 The All element .632 17.3.4 The Usage attribute .633 17.3.5 The Preference attribute .633 17.3.6 The PolicyRef erence element .633 17.3.7 The PolicyURls attribute .634 17.3.8 The PolicyAttachment element .635 17.3.9 Additional types of policy assertions .635 17.4 WS-MetadataExchange language basics .·.636 17.4.1 The GetMetadata element .637 17.4.2 The Dialect element .638 17.4.3 The identifier element .639 17.4.4 The Metadata, MetadataSection, and MetadataRef erence elements .640 17.4.5 The Get message .641 17.5 WS-Security language basics .642 17.5.1 The Security element (WS-Security) .644 17.5.2 The UsernameToken, Username, and Password elements (WS-Security) .644 17.5.3 The BinarySecurityToken element (WS-Security) .644 17.5.4 The SecurityTokenRef erence element (WS-Security) .644 17.5.5 Composing Security element contents (WS-Security) .645 17.5.6 The EncryptedData element (XML-Encryption) .646 17.5.7 The CipherData, CipherValue, and CipherRef erence elements (XML-Encryption) .647 17.5.8 XML-Signature elements .648 Chapter 18 SOA Platforms esi 18.1 SOA platform basics .652 18.1.1 Basic platform building blocks .653 18.1.2 Common SOA platform layers .654 18.1.3 Relationship between SOA layers and technologies .655 18.1.4 Fundamental service technology architecture .656 18.1.5 Vendor platforms .667 18.2 SOA support in J2EE .668 18.2.1 Platform overview .668 18.2.2 Primitive SOA support .681 Contents XXV 18.2.3 Support for service-orientation principles .682 18.2.4 Contemporary SOA support .683 18.3 SOA support in .NET .688 18.3.1 Platform overview .688 18.3.2 Primitive SOA support .697 18.3.3 Support for service-orientation principles .698 18.3.4 Contemporary SOA support .700 18.4 Integration considerations .703 Appendix A Case Studies: Conclusion 707 A.1 RaiiCo Ltd .708 A.2 Transit Line Systems Inc .711 A.3 The Oasis Car Wash .715 Appendix В Service Models Reference 717 About the Author 721 About SOA Systems 723 About the Photographs 725 Index 727 The foremost "how-to" guide to SOA from the world's top-selling SOA author Service-Oriented Architecture (SOA) is at the heart of a revolutionary computing platform that is being adopted world-wide and has earned the support of every major software provider. This new book by Thomas Eri (author of the international best-seller Service-Oriented Architecture: A Field Guide to Integrating XML and Web Services) provides a comprehensive, end-to-end tutorial for SOA, Web services, and service-orientation. Eri uses more than 125 case study examples and over 300 diagrams to illuminate the most important facets of building SOA platforms: goals, obstacles, concepts, technologies, standards, delivery strategies, and processes for analysis and design. His book's broad coverage includes • Detailed step-by-step processes for service-oriented analysis and service-oriented design • An in-depth exploration of service-orientation as a distinct design paradigm, including a comparison to object-orientation • A comprehensive study of SOA support in .NET and J2EE development and runtime platforms • Descriptions of over a dozen key Web services technologies and WS-* specifications, including explanations of how they interrelate and how they are positioned within SOA • The use of "In Plain English" sections, which describe complex concepts through non-technical analogies • Guidelines for service-oriented business modeling ani the creation of specialized service abstraction layers • A study contrasting past architectures with SOA and reviewing current industry influences • Project planning and the comparison of different SOA deljvery strategies The goal of this book is to help you attain a solid understanding of what constitutes contemporary SOA along with step-by-step guidance for realizing its successful implementation.
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edition	5. print.
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illustrated	Illustrated
index_date	2024-07-02T15:28:24Z
indexdate	2024-07-09T20:42:53Z
institution	BVB
isbn	0131858580
language	English
oai_aleph_id	oai:aleph.bib-bvb.de:BVB01-014951187
oclc_num	254697362
open_access_boolean
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physical	XXVIII, 760 S. Ill., graph. Darst.
publishDate	2006
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publisher	Prentice Hall
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spelling	Erl, Thomas Verfasser aut Service oriented architecture concepts, technology, and design Thomas Erl Service-oriented architecture 5. print. Upper Saddle River, NJ ; Munich [u.a.] Prentice Hall 2006 XXVIII, 760 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Serviceorientierte Architektur Computerarchitektur (DE-588)4048717-9 gnd rswk-swf Serviceorientierte Architektur (DE-588)4841015-9 gnd rswk-swf XML (DE-588)4501553-3 gnd rswk-swf Web Services (DE-588)4691234-4 gnd rswk-swf Serviceorientierte Architektur (DE-588)4841015-9 s DE-604 Computerarchitektur (DE-588)4048717-9 s XML (DE-588)4501553-3 s Web Services (DE-588)4691234-4 s Digitalisierung UB Regensburg application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=014951187&sequence=000003&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis Digitalisierung UB Regensburg application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=014951187&sequence=000004&line_number=0002&func_code=DB_RECORDS&service_type=MEDIA Klappentext
spellingShingle	Erl, Thomas Service oriented architecture concepts, technology, and design Serviceorientierte Architektur Computerarchitektur (DE-588)4048717-9 gnd Serviceorientierte Architektur (DE-588)4841015-9 gnd XML (DE-588)4501553-3 gnd Web Services (DE-588)4691234-4 gnd
subject_GND	(DE-588)4048717-9 (DE-588)4841015-9 (DE-588)4501553-3 (DE-588)4691234-4
title	Service oriented architecture concepts, technology, and design
title_alt	Service-oriented architecture
title_auth	Service oriented architecture concepts, technology, and design
title_exact_search	Service oriented architecture concepts, technology, and design
title_exact_search_txtP	Service oriented architecture concepts, technology, and design
title_full	Service oriented architecture concepts, technology, and design Thomas Erl
title_fullStr	Service oriented architecture concepts, technology, and design Thomas Erl
title_full_unstemmed	Service oriented architecture concepts, technology, and design Thomas Erl
title_short	Service oriented architecture
title_sort	service oriented architecture concepts technology and design
title_sub	concepts, technology, and design
topic	Serviceorientierte Architektur Computerarchitektur (DE-588)4048717-9 gnd Serviceorientierte Architektur (DE-588)4841015-9 gnd XML (DE-588)4501553-3 gnd Web Services (DE-588)4691234-4 gnd
topic_facet	Serviceorientierte Architektur Computerarchitektur XML Web Services
url	http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=014951187&sequence=000003&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=014951187&sequence=000004&line_number=0002&func_code=DB_RECORDS&service_type=MEDIA
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