Produktbild: SOA Design Patterns

SOA Design Patterns

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Produktdetails

Einband

Taschenbuch

Erscheinungsdatum

28.09.2024

Verlag

Pearson Education Limited

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864

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23.5/17.8/4.6 cm

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1411 g

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1

Sprache

Englisch

ISBN

978-0-13-476742-0

Beschreibung

Produktdetails

Einband

Taschenbuch

Erscheinungsdatum

28.09.2024

Verlag

Pearson Education Limited

Seitenzahl

864

Maße (L/B/H)

23.5/17.8/4.6 cm

Gewicht

1411 g

Auflage

1

Sprache

Englisch

ISBN

978-0-13-476742-0

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Pearson
St.-Martin-Straße 82
81541 München
DE

Email: salesde@pearson.com

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  • Produktbild: SOA Design Patterns
  • Foreword...xxxvii

    CHAPTER 1: Introduction...1

    1.1 Objectives of this Book 
    ...
    4

    1.2 Who this Book is For 
    ...
    4

    1.3 What this Book Does Not Cover
    ...
      4

    Topics Covered by Other Books 
    ...
    4

    Web Service and REST Service Design Patterns 
    ...
    5

    SOA Standardization Efforts
    ...
      5

    1.4 Recommended Reading 
    ...
    6

    1.5 How this Book is Organized
    ...
      7

    Part I: Fundamentals
    ...
      8

    Part II: Service Inventory Design Patterns
    ...
      8

    Part III: Service Design Patterns  . . 8

    Part IV: Service Composition Design Patterns  . . 9

    Part V: Supplemental. . . 10

    Part VI: Appendices . . . 10

    1.6 Symbols, Figures, Style Conventions  . . . 11

    Symbol Legend  . . . 11

    How Color is Used  11

    Data Flow and Directionality Conventions  . . 11

    Pattern Documentation Conventions  . 11

    1.7 Additional Information    11

    Notification Service  13

    Contact the Author  13

    CHAPTER 2: Case Study Background  . 15

    2.1 Case #1 Background: Cutit Saws Ltd  17

    History  18

    Technical Infrastructure and Automation Environment  .  18

    Business Goals and Obstacles.  . 18

    2.2 Case #2 Background: Alleywood Lumber Company  . 19

    History  19

    Technical Infrastructure and Automation Environment  .  20

    Business Goals and Obstacles.  . 20

    2.3 Case #3 Background: Forestry Regulatory

    Commission (FRC) . . 21

    History  21

    Technical Infrastructure and Automation Environment  .  21

    Business Goals and Obstacles.  . 22

    PART I: FUNDAMENTALS

    CHAPTER 3: Basic Terms and Concepts  .  . . . . 25

    Purpose of this Introductory Chapter  . . . 26

    3.1 Architecture Fundamentals  26

    A Classic Analogy for Architecture and Infrastructure  .  27

    Technology Architecture 27

    Technology Infrastructure  . 30

    Software Program  . 32

    Relationship to Design Framework   . 33

    3.2 Service-Oriented Computing Fundamentals.  .  . . 35

    Service-Oriented Computing  . . . 35

    Service-Orientation  36

    Service-Oriented Architecture (SOA)  . . . 37

    Service  .  . . . . 37

    Service Capability  . 38

    Service Consumer.  38

    Service Composition . . . 40

    Service Inventory.  . 42

    Service-Oriented Analysis.  43

    Service Candidate.  44

    3.3 Service Implementation Mediums  . . . 44

    Services as Components  . 45

    Services as Web Services  45

    REST Services.  . . . 46

    CHAPTER 4: The Architecture of Service-Orientation . . 47

    Purpose of this Introductory Chapter  . . . 48

    4.1 The Method of Service-Orientation  48

    Principles of Service-Orientation.  48

    Strategic Goals of Service-Oriented Computing.  .  . . . . 51

    4.2 The Four Characteristics of SOA   52

    Business-Driven  . . 53

    Vendor-Neutral  . . . 54

    Enterprise-Centric  . 58

    Composition-Centric . . . 59

    4.3 The Four Common Types of SOA  . 61

    Service Architecture . . . 62

    Information Hiding  . . . . 64

    Design Standards  .  64

    Service Contracts  .  65

    Service Agents  .  . . 67

    Service Capabilities  . . . 68

    Service Composition Architecture   . 68

    Nested Compositions  . . 72

    Task Services and Alternative Compositions  . 73

    Compositions and Infrastructure.    74

    Service Inventory Architecture  . . 74

    Service-Oriented Enterprise Architecture   76

    Architecture Types and Scope  . . 77

    Architecture Types and Inheritance   77

    Other Forms of Service-Oriented Architecture  . 78

    Inter-Business Service Architecture  . . 78

    Service-Oriented Community Architecture  . . 78

    4.4 The End Result of Service-Orientation  . . 79

    CHAPTER 5: Understanding SOA Design Patterns  . 85

    Purpose of this Introductory Chapter  . . . 86

    5.1 Fundamental Terminology.  86

    What’s a Design Pattern?  . 86

    What’s a Compound Pattern?  . . . 88

    What’s a Design Pattern Language?  . 88

    What’s a Design Pattern Catalog?  . . . 89

    5.2 Historical Influences  89

    Alexander’s Pattern Language  . . 90

    Object-Oriented Patterns  . 91

    Software Architecture Patterns  . . 92

    Enterprise Application Architecture Patterns  . . 93

    EAI Patterns  .  93

    SOA Patterns  . . . . 94

    5.3 Pattern Notation . 95

    Pattern Symbols  . . 95

    Pattern Figures  . . . 96

    Pattern Application Sequence Figures  96

    Pattern Relationship Figures. 96

    Compound Pattern Hierarchy Figures  99

    Capitalization.  . . . 100

    Page Number References.    100

    5.4 Pattern Profiles . 100

    Requirement  . . . . 101

    Icon  . 101

    Summary  .  . 102

    Problem  .  . . . 102

    Solution  .  . . . 102

    Application  .  103

    Impacts  .  . . . 103

    Relationships.  . . . 103

    Case Study Example. . 103

    5.5 Patterns with Common Characteristics.  104

    Canonical Patterns . . . 104

    Centralization Patterns 105

    5.6 Key Design Considerations  . . 106

    “Enterprise” vs. “Enterprise-wide”  . . 106

    Design Patterns and Design Principles  106

    Design Patterns and Design Granularity  . . 107

    Measures of Design Pattern Application  . . 108

    PART II: SERVICE INVENTORY DESIGN PATTERNS

    CHAPTER 6: Foundational Inventory Patterns  . . . 111

    How Inventory Design Patterns Relate to SOA Design

    Characteristics  . . 113

    How Foundational Inventory and Service Patterns Relate  . 114

    How Case Studies are Used in this Chapter.  . 114

    6.1 Inventory Boundary Patterns  . 114

    Enterprise Inventory  . 116

    Problem  .  . . . 116

    Solution  .  . . . 117

    Application.  .  118

    Impacts  .  . . . 120

    Relationships.  . . . 121

    Case Study Example. . 122

    Domain Inventory . 123

    Problem  .  . . . 123

    Solution  .  . . . 124

    Application.  .  125

    Impacts  .  . . . 126

    Relationships.  . . . 127

    Case Study Example. . 128

    6.2 Inventory Structure Patterns   130

    Service Normalization.    131

    Problem  .  . . . 131

    Solution  .  . . . 132

    Application.  .  132

    Impacts  .  . . . 133

    Relationships.  . . . 133

    Case Study Example. . 135

    Logic Centralization  . 136

    Problem  .  . . . 136

    Solution  .  . . . 137

    Application.  .  137

    Impacts  .  . . . 139

    Relationships.  . . . 140

    Case Study Example. . 142

    Service Layers  143

    Problem  .  . . . 143

    Solution  .  . . . 144

    Application.  .  145

    Impacts  .  . . . 147

    Relationships.  . . . 147

    Case Study Example. . 148

    6.3 Inventory Standardization Patterns   149

    Canonical Protocol 150

    Problem  .  . . . 151

    Solution  .  . . . 152

    Application.  .  153

    Impacts  .  . . . 155

    Relationships.  . . . 155

    Case Study Example. . 157

    Canonical Schema 158

    Problem  .  . . . 158

    Solution  .  . . . 159

    Application.  .  159

    Impacts  .  . . . 159

    Relationships.  . . . 160

    Case Study Example. . 161

    CHAPTER 7: Logical Inventory Layer Patterns  . . . 163

    Combining Layers  164

    Business Logic and Utility Logic  . . . 166

    Agnostic Logic and Non-Agnostic Logic   166

    Service Layers and Logic Types  . . . 167

    Utility Abstraction . 168

    Problem  .  . . . 168

    Solution  .  . . . 169

    Application.  .  170

    Impacts  .  . . . 171

    Relationships.  . . . 171

    Case Study Example. . 173

    Entity Abstraction . 175

    Problem  .  . . . 175

    Solution  .  . . . 176

    Application.  .  176

    Impacts  .  . . . 178

    Relationships.  . . . 178

    Case Study Example. . 180

    Process Abstraction  . 182

    Problem  .  . . . 182

    Solution  .  . . . 183

    Application.  .  184

    Impacts  .  . . . 185

    Relationships.  . . . 185

    Case Study Example. . 187

    CHAPTER 8: Inventory Centralization Patterns  . . 191

    Process Centralization    193

    Problem  .  . . . 193

    Solution  .  . . . 194

    Application.  .  195

    Impacts  .  . . . 196

    Relationships.  . . . 197

    Case Study Example. . 198

    Schema Centralization    200

    Problem  .  . . . 200

    Solution  .  . . . 201

    Application.  .  202

    Impacts  .  . . . 202

    Relationships.  . . . 203

    Case Study Example. . 203

    Policy Centralization  . 207

    Problems  .  . . 207

    Solution  .  . . . 208

    Application.  .  209

    Impacts  .  . . . 210

    Relationships.  . . . 211

    Case Study Example. . 213

    Rules Centralization  . 216

    Problem  .  . . . 216

    Solution  .  . . . 217

    Application.  .  217

    Impacts  .  . . . 218

    Relationships.  . . . 219

    Case Study Example. . 222

    CHAPTER 9: Inventory Implementation Patterns  . 225

    Dual Protocols  227

    Problem  .  . . . 228

    Solution  .  . . . 228

    Application.  .  228

    Impacts  .  . . . 233

    Relationships.  . . . 234

    Case Study Example. . 235

    Canonical Resources  237

    Problem  .  . . . 238

    Solution  .  . . . 238

    Application.  .  239

    Impacts  .  . . . 239

    Relationships.  . . . 239

    Case Study Example. . 241

    State Repository . . 242

    Problem  .  . . . 242

    Solution  .  . . . 243

    Application.  .  244

    Impacts  .  . . . 244

    Relationships.  . . . 244

    Case Study Example. . 246

    Stateful Services . . 248

    Problem  .  . . . 248

    Solution  .  . . . 248

    Application.  .  250

    Impacts  .  . . . 250

    Relationships.  . . . 250

    Case Study Example. . 251

    Service Grid  . . 254

    Problem  .  . . . 254

    Solution  .  . . . 255

    Application.  .  256

    Impacts  .  . . . 257

    Relationships.  . . . 258

    Case Study Example. . 259

    Inventory Endpoint 260

    Problem  .  . . . 260

    Solution  .  . . . 261

    Application.  .  262

    Impacts  .  . . . 263

    Relationships.  . . . 263

    Case Study Example. . 265

    Cross-Domain Utility Layer  267

    Problem  .  . . . 267

    Solution  .  . . . 268

    Application.  .  269

    Impacts  .  . . . 269

    Relationships.  . . . 270

    Case Study Example. . 270

    CHAPTER 10: Inventory Governance Patterns  . . . 273

    Canonical Expression.    275

    Problem  .  . . . 275

    Solution  .  . . . 275

    Application.  .  276

    Impacts  .  . . . 277

    Relationships.  . . . 278

    Case Study Example. . 279

    Metadata Centralization  . . . 280

    Problem  .  . . . 280

    Solution  .  . . . 281

    Application.  .  282

    Impacts  .  . . . 283

    Relationships.  . . . 283

    Case Study Example. . 284

    Canonical Versioning  286

    Problem  .  . . . 286

    Solution  .  . . . 287

    Application.  .  287

    Impacts  .  . . . 288

    Relationships.  . . . 288

    Case Study Example. . 290

    PART III: SERVICE DESIGN PATTERNS

    CHAPTER 11: Foundational Service Patterns  . . . . 295

    Case Study Background    297

    11.1 Service Identification Patterns  . 299

    Functional Decomposition  . 300

    Problem  .  . . . 300

    Solution  .  . . . 301

    Application.  .  302

    Impacts  .  . . . 302

    Relationships.  . . . 303

    Case Study Example. . 303

    Service Encapsulation    305

    Problem  .  . . . 305

    Solution  .  . . . 306

    Application.  .  307

    Impacts  .  . . . 309

    Relationships.  . . . 309

    Case Study Example. . 310

    11.2 Service Definition Patterns   311

    Agnostic Context. . 312

    Problem  .  . . . 313

    Solution  .  . . . 314

    Application.  .  315

    Impacts  .  . . . 315

    Relationships.  . . . 316

    Case Study Example. . 317

    Non-Agnostic Context    319

    Problem  .  . . . 319

    Solution  .  . . . 320

    Application.  .  321

    Impacts  .  . . . 322

    Relationships.  . . . 322

    Case Study Example. . 323

    Agnostic Capability324

    Problem  .  . . . 324

    Solution  .  . . . 325

    Application.  .  326

    Impacts  .  . . . 327

    Relationships.  . . . 327

    Case Study Example. . 328

    CHAPTER 12: Service Implementation Patterns.  . 331

    Service Façade . . . 333

    Problem  .  . . . 333

    Solution  .  . . . 334

    Application.  .  335

    Impacts  .  . . . 341

    Relationships.  . . . 342

    Case Study Example. . 343

    Redundant Implementation  345

    Problem  .  . . . 345

    Solution  .  . . . 346

    Application.  .  346

    Impacts  .  . . . 347

    Relationships.  . . . 348

    Case Study Example. . 349

    Service Data Replication  . . 350

    Problem  .  . . . 350

    Solution  .  . . . 352

    Application.  .  353

    Impacts  .  . . . 353

    Relationships.  . . . 353

    Case Study Example. . 354

    Partial State Deferral  . 356

    Problem  .  . . . 356

    Solution  .  . . . 357

    Application.  .  358

    Impacts  .  . . . 359

    Relationships.  . . . 359

    Case Study Example. . 360

    Partial Validation . . 362

    Problem  .  . . . 362

    Solution  .  . . . 363

    Application.  .  364

    Impacts  .  . . . 364

    Relationships.  . . . 364

    Case Study Example. . 365

    UI Mediator.  . . 366

    Problem  .  . . . 366

    Solution  .  . . . 367

    Application.  .  368

    Impacts  .  . . . 369

    Relationships.  . . . 370

    Case Study Example. . 370

    CHAPTER 13: Service Security Patterns  .  . . 373

    Case Study background    374

    Exception Shielding  . 376

    Problem  .  . . . 376

    Solution  .  . . . 377

    Application.  .  378

    Impacts  .  . . . 379

    Relationships.  . . . 379

    Case Study Example. . 380

    Message Screening381

    Problem  .  . . . 381

    Solution  .  . . . 382

    Application  .  382

    Impacts  .  . . . 384

    Relationships.  . . . 385

    Case Study Example. . 385

    Trusted Subsystem 387

    Problem  .  . . . 387

    Solution  .  . . . 388

    Application.  .  388

    Impacts  .  . . . 391

    Relationships.  . . . 391

    Case Study Example. . 392

    Service Perimeter Guard  394

    Problem  .  . . . 394

    Solution  .  . . . 395

    Application  .  395

    Impacts  .  . . . 396

    Relationships.  . . . 396

    Case Study Example. . 397

    CHAPTER 14: Service Contract Design Patterns  . 399

    Decoupled Contract  . 401

    Problem  .  . . . 401

    Solution  .  . . . 402

    Application.  .  403

    Impacts  .  . . . 405

    Relationships.  . . . 405

    Case Study Example. . 407

    Contract Centralization  . 409

    Problem  .  . . . 409

    Solution  .  . . . 410

    Application.  .  410

    Impacts  .  . . . 411

    Relationships.  . . . 411

    Case Study Example. . 413

    Contract Denormalization.  . 414

    Problem  .  . . . 414

    Solution  .  . . . 415

    Application.  .  416

    Impacts  .  . . . 417

    Relationships.  . . . 417

    Case Study Example. . 418

    Concurrent Contracts  421

    Problem  .  . . . 421

    Solution  .  . . . 422

    Application.  .  423

    Impacts  .  . . . 425

    Relationships.  . . . 425

    Case Study Example. . 426

    Validation Abstraction    429

    Problem  .  . . . 429

    Solution  .  . . . 430

    Application.  .  431

    Impacts  .  . . . 432

    Relationships.  . . . 432

    Case Study Example. . 433

    Chapter 15: Legacy Encapsulation Patterns  . . . 439

    Legacy Wrapper. . . 441

    Problem  .  . . . 441

    Solution  .  . . . 442

    Application.  .  443

    Impacts  .  . . . 444

    Relationships.  . . . 444

    Case Study Example. . 446

    Multi-Channel Endpoint  . . . 451

    Problem  .  . . . 451

    Solution  .  . . . 452

    Application.  .  453

    Impacts  .  . . . 454

    Relationships.  . . . 454

    Case Study Example. . 456

    File Gateway  . 457

    Problem  .  . . . 457

    Solution  .  . . . 458

    Application.  .  458

    Impacts  .  . . . 459

    Relationships.  . . . 460

    Case Study Example. . 461

    CHAPTER 16: Service Governance Patterns.  . . . . 463

    Compatible Change465

    Problem  .  . . . 465

    Solution  .  . . . 466

    Application.  .  466

    Impacts  .  . . . 469

    Relationships.  . . . 469

    Case Study Example. . 470

    Version Identification  472

    Problem  .  . . . 472

    Solution  .  . . . 473

    Application.  .  473

    Impacts  .  . . . 474

    Relationships.  . . . 474

    Case Study Example. . 475

    Termination Notification  . . . 478

    Problem  .  . . . 478

    Solution  .  . . . 479

    Application.  .  480

    Impacts  .  . . . 480

    Relationships.  . . . 481

    Case Study Example. . 481

    Service Refactoring484

    Problem  .  . . . 484

    Solution  .  . . . 485

    Application.  .  485

    Impacts  .  . . . 486

    Relationships.  . . . 486

    Case Study Example. . 488

    Service Decomposition  . 489

    Problem  .  . . . 489

    Solution  .  . . . 491

    Application.  .  492

    Impacts  .  . . . 492

    Relationships.  . . . 494

    Case Study Example. . 495

    Proxy Capability . . 497

    Problem  .  . . . 497

    Solution  .  . . . 498

    Application.  .  498

    Impacts  .  . . . 500

    Relationships.  . . . 500

    Case Study Example. . 501

    Decomposed Capability  . . . 504

    Problem  .  . . . 504

    Solution  .  . . . 506

    Application.  .  507

    Impacts  .  . . . 507

    Relationships.  . . . 508

    Case Study Example. . 508

    Distributed Capability  510

    Problem  .  . . . 510

    Solution  .  . . . 511

    Application.  .  512

    Impacts  .  . . . 513

    Relationships.  . . . 513

    Case Study Example. . 514

    PART IV: SERVICE COMPOSITION DESIGN PATTERNS

    CHAPTER 17: Capability Composition Patterns  . . 519

    Capability Composition  . . . 521

    Problem  .  . . . 521

    Solution  .  . . . 521

    Application.  .  523

    Impacts  .  . . . 523

    Relationships.  . . . 523

    Case Study Example. . 524

    Capability Recomposition  . 526

    Problem  .  . . . 526

    Solution  .  . . . 527

    Application.  .  527

    Impacts  .  . . . 527

    Relationships.  . . . 529

    Case Study Example. . 530

    CHAPTER 18: Service Messaging Patterns.  .  531

    Service Messaging 533

    Problem  .  . . . 533

    Solution  .  . . . 533

    Application.  .  534

    Impacts  .  . . . 534

    Relationships.  . . . 535

    Case Study Example. . 536

    Messaging Metadata  538

    Problem  .  . . . 538

    Solution  .  . . . 538

    Application.  .  539

    Impacts  .  . . . 540

    Relationships.  . . . 541

    Case Study Example. . 542

    Service Agent  543

    Problem  .  . . . 543

    Solution  .  . . . 544

    Application.  .  544

    Impacts  .  . . . 546

    Relationships.  . . . 546

    Case Study Example. . 548

    Intermediate Routing  549

    Problem  .  . . . 549

    Solution  .  . . . 551

    Application.  .  552

    Impacts  .  . . . 553

    Relationships.  . . . 553

    Case Study Example. . 556

    State Messaging . . 557

    Problem  .  . . . 557

    Solution  .  . . . 558

    Application.  .  560

    Impacts  .  . . . 561

    Relationships.  . . . 561

    Case Study Example. . 562

    Service Callback . . 566

    Problem  .  . . . 566

    Solution  .  . . . 568

    Application.  .  568

    Impacts  .  . . . 570

    Relationships.  . . . 570

    Case Study Example. . 571

    Service Instance Routing  . . 574

    Problem  .  . . . 574

    Solution  .  . . . 576

    Application.  .  576

    Impacts  .  . . . 578

    Relationships.  . . . 578

    Case Study Example. . 579

    Asynchronous Queuing  . . . 582

    Problem  .  . . . 582

    Solution  .  . . . 584

    Application.  .  584

    Impacts  .  . . . 587

    Relationships.  . . . 588

    Case Study Example. . 589

    Reliable Messaging 592

    Problem  .  . . . 592

    Solution  .  . . . 593

    Application.  .  593

    Impacts  .  . . . 594

    Relationships.  . . . 595

    Case Study Example. . 596

    Event-Driven Messaging  599

    Problem  .  . . . 599

    Solution  .  . . . 600

    Application.  .  602

    Impacts  .  . . . 602

    Relationships.  . . . 602

    Case Study Example. . 604

    CHAPTER 19: Composition Implementation Patterns . . 605

    Agnostic Sub-Controller  607

    Problem  .  . . . 607

    Solution  .  . . . 608

    Application.  .  610

    Impacts  .  . . . 610

    Relationships.  . . . 610

    Case Study Example. . 612

    Composition Autonomy  . . . 616

    Problem  .  . . . 616

    Solution  .  . . . 618

    Application.  .  619

    Impacts  .  . . . 619

    Relationships.  . . . 620

    Case Study Example. . 620

    Atomic Service Transaction  623

    Problem  .  . . . 623

    Solution  .  . . . 624

    Application.  .  626

    Impacts  .  . . . 626

    Relationships.  . . . 628

    Case Study Example. . 629

    Compensating Service Transaction  . . 631

    Problem  .  . . . 631

    Solution  .  . . . 633

    Application.  .  633

    Impacts  .  . . . 635

    Relationships.  . . . 635

    Case Study Example. . 636

    CHAPTER 20: Service Interaction Security Patterns . . 639

    Data Confidentiality641

    Problem  .  . . . 641

    Solution  .  . . . 643

    Application.  .  643

    Impacts  .  . . . 644

    Relationships.  . . . 645

    Case Study Example. . 646

    Data Origin Authentication.  649

    Problem  .  . . . 649

    Solution  .  . . . 650

    Application.  .  651

    Impacts  .  . . . 652

    Relationships.  . . . 653

    Case Study Example. . 653

    Direct Authentication  656

    Problem  .  . . . 656

    Solution  .  . . . 657

    Application.  .  657

    Impacts  .  . . . 658

    Relationships.  . . . 659

    Case Study Example. . 660

    Brokered Authentication  661

    Problem  .  . . . 661

    Solution  .  . . . 662

    Application.  .  663

    Impacts  .  . . . 665

    Relationships.  . . . 665

    Case Study Example. . 666

    CHAPTER 21: Transformation Patterns  .  . . . 669

    Data Model Transformation  671

    Problem  .  . . . 671

    Solution  .  . . . 672

    Application.  .  673

    Impacts  .  . . . 674

    Relationships.  . . . 674

    Case Study Example. . 677

    Data Format Transformation  . . . 681

    Problem  .  . . . 681

    Solution  .  . . . 681

    Application.  .  683

    Impacts  .  . . . 683

    Relationships.  . . . 683

    Case Study Example. . 685

    Protocol Bridging . 687

    Problem  .  . . . 687

    Solution  .  . . . 688

    Application.  .  688

    Impacts  .  . . . 690

    Relationships.  . . . 690

    Case Study Example. . 692

    PART V: SUPPLEMENTAL

    CHAPTER 22: Common Compound Design Patterns . . . 697

    “Compound” vs. “Composite”  . . . 698

    Compound Patterns and Pattern Relationships  .  . . 698

    Joint Application vs. Coexistent Application.  .  . . . . 699

    Compound Patterns and Pattern Granularity  .  . . . . 700

    Orchestration.  701

    Enterprise Service Bus  . 704

    Service Broker  707

    Canonical Schema Bus  . 709

    Official Endpoint . . 711

    Federated Endpoint Layer  . 713

    Three-Layer Inventory.    715

    CHAPTER 23: Strategic Architecture Considerations. . 717

    Increased Federation  . 718

    Increased Intrinsic Interoperability  . . 721

    Increased Vendor Diversification Options.  . 723

    Increased Business and Technology Alignment.  .  . 725

    Increased ROI  . 727

    Increased Organizational Agility   728

    Reduced IT Burden. 729

    CHAPTER 24: Principles and Patterns at the

    U.S. Department of Defense  . 731

    The Business Operating Environment (BOE)  .  . . . . 733

    Principles, Patterns, and the BOE  . . 734

    Incorporation of Information Assurance (IA)  . . 736

    Adherence to Standards  . 736

    Data Visibility, Accessibility, and Understandability to

    Support Decision Makers  736

    Loosely Coupled Services    736

    Authoritative Sources of Trusted Data   737

    Metadata-Driven Framework for Separation from

    Technical Details  . 737

    Support Use of Open Source Software  . . . 738

    Emphasize Use of Service-Enabled Commercial

    Off-the-Shelf (COTS) Software  . 738

    Participation in the DoD Enterprise   738

    Support Mobility — Users & Devices  . . 738

    The Future of SOA and the DoD   739

    PART VI: APPENDICES

    APPENDIX A: Case Study Conclusion  743

    Cutit Saws Ltd.  744

    Alleywood Lumber Company  744

    Forestry Regulatory Commission (FRC)  . . . 745

    APPENDIX B: Candidate Patterns  . . 747

    APPENDIX C: Principles of Service-Orientation  . . 749

    Standardized Service Contract   . 751

    Service Loose Coupling    753

    Service Abstraction . 755

    Service Reusability . 756

    Service Autonomy . . 758

    Service Statelessness  . 760

    Service Discoverability  762

    Service Composability  764

    APPENDIX D: Patterns and Principles

    Cross-Reference  . . . 767

    APPENDIX E: Patterns and Architecture Types

    Cross-Reference  . . . 775

    About the Author  . . . 783

    About the Contributors   . 784

    Index of Patterns  . . . 791

    Index  . 795