دانلود کتاب Future-proof software-systems a sustainable evolution strategy

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Foreword 1......Page 5
Foreword 2......Page 7
Preface......Page 9
Acknowledgements......Page 12
Contents......Page 13
About the Author......Page 20
List of Figures......Page 21
List of Tables......Page 26
List of Definitions......Page 27
List of Principles......Page 30
Part I Foundation......Page 31
Abstract......Page 32
1.1Software Everywhere......Page 33
1.2Opportunities for Software......Page 35
1.4Balancing Opportunities and Risks of Software......Page 36
1.5Toward Dependable Software......Page 37
References......Page 38
2.1Entropy in Software......Page 40
2.2Technical Debt......Page 43
2.3Architecture Erosion......Page 44
2.4Fighting the Force of Entropy......Page 45
References......Page 47
3.1Systems Engineering......Page 49
3.2Three Devils of Systems Engineering......Page 51
3.3Complexity......Page 52
3.4Change......Page 54
3.5Uncertainty......Page 55
3.6Structure of Complex Systems......Page 57
3.6.1Horizontal Architecture Layers......Page 58
3.6.2Vertical Architecture Layers......Page 60
3.6.3Hierarchy Levels......Page 62
3.7.1Enterprise Computing......Page 63
3.7.3Cyber-Physical Systems......Page 64
3.8Systems-of-Systems......Page 67
References......Page 68
4.1Why Future-Proof Software-Systems?......Page 73
4.2Future-Proof Software-Systems Definition......Page 74
4.3Systems Engineering and Software Engineering......Page 75
4.4Business-IT Alignment......Page 78
4.6Changeability......Page 80
4.7Dependability......Page 81
References......Page 82
5.1The Pathway to Future-Proof Software-Systems......Page 84
5.2.1Principle......Page 86
5.3Business Value Metric......Page 91
5.4Changeability Metric......Page 93
5.5Dependability Metric......Page 96
5.6Other Quality of Service Property Metrics......Page 101
5.8Quality of Service Properties Scorecard......Page 102
5.10Continuous Improvement, Constant Rearchitecting, Regular Refactoring......Page 103
5.12Periodic Architecture Programs......Page 107
5.13Processes for Managed Evolution......Page 108
5.14Architecture Process......Page 109
5.15The Value of Managed Evolution......Page 110
5.16Final Words......Page 111
References......Page 112
6.1Architecture Definition......Page 117
6.1.2Behavior......Page 118
6.1.4Levels of Architecture......Page 119
6.1.5Parts, Relationships, and Models in the Application Architecture Hierarchy......Page 120
6.2.1Impact of Architecture......Page 122
6.2.2Longevity of Architecture......Page 123
6.3Legacy Systems......Page 124
6.4Architecture Integration Challenge......Page 125
6.5Evolutionary Architecture......Page 128
6.7How much Architecture?......Page 131
6.8Architecture Tools......Page 133
References......Page 134
7.1Principles in Science......Page 138
7.2Software Architecture Principles......Page 139
7.3Horizontal Architecture Principles......Page 140
7.4Vertical Architecture Principles......Page 141
7.5Software Architecture Principle Formalization......Page 142
7.7Patterns......Page 143
7.9Principle-Based Architecting......Page 145
References......Page 146
8.1Context Requirements......Page 150
8.2Company Management......Page 151
8.3.1Formalized Achitecture Knowledge......Page 152
8.3.2Architecture Governance......Page 154
8.4Architecture Organization......Page 155
8.5Company Culture......Page 157
8.7Metrics......Page 158
References......Page 160
Abstract......Page 163
9.1.1Complexity......Page 164
9.1.2Change......Page 166
9.1.3Uncertainty......Page 168
9.2Increased Risk and More Sophisticated Threats......Page 169
9.3.1Separation of Concerns......Page 170
9.3.2Abstractions......Page 171
9.4Models-to-Code......Page 173
9.5Provably Correct Software......Page 174
References......Page 176
10.1.1The Agile Manifesto......Page 183
10.1.2Agile Application Spectrum......Page 184
10.1.3Agile Methods and Future-Proof Software-Systems......Page 186
10.1.4Large-Scale Agile......Page 188
10.1.5Agility against Architecture?......Page 189
10.1.6Agile Requirements Engineering......Page 190
10.1.7Agile Risk Management......Page 192
10.2Continuous Delivery and DevOps......Page 194
10.2.1Continuous Delivery......Page 195
10.2.2DevOps......Page 196
10.2.3Continuous Delivery, DevOps and Future-Proof Software-Systems......Page 198
10.3.1Legacy Software......Page 200
10.3.2Legacy Software Modernization/Migration......Page 203
10.3.3Legacy Software Replacement......Page 205
10.3.4Legacy Software Rearchitecting......Page 206
10.3.5Legacy Software Reengineering......Page 208
10.3.6Legacy Software Refactoring: Code......Page 210
10.3.7Legacy Software Refactoring: Data/Information......Page 212
10.3.8Legacy Systems Modernization/Migration Strategies......Page 213
10.3.9Stop Legacy Software Creation......Page 214
10.4.4Time Interval......Page 215
10.4.7Modeling Time in Software-Systems......Page 216
References......Page 217
Part II Principles......Page 223
11.1Introduction......Page 224
11.2α-Architecture Principle #1: IT-System as Investment......Page 225
11.3α-Architecture Principle #2: Managed Evolution Culture......Page 226
References......Page 227
12.1Introduction......Page 229
12.2.2Isolation......Page 231
12.3.1Introduction......Page 233
12.3.2Partitioning......Page 236
12.3.3Partitioning Rules......Page 238
12.3.4Encapsulation......Page 239
12.3.5Interfaces......Page 241
12.3.6Coupling......Page 242
12.4.1Conceptual Integrity in an Organization......Page 244
12.4.2Achieving Conceptual Integrity......Page 245
12.4.3Domain Software Engineering......Page 246
12.4.4Hidden Assumptions......Page 247
12.5.1Redundancy......Page 249
12.5.2Unmanaged Redundancy......Page 250
12.5.3Managed Redundancy......Page 253
12.5.4Redundancy Synchronization......Page 255
12.5.6Redundancy Avoidance Pattern......Page 256
12.6.1Interoperability Levels......Page 257
12.6.2Contracts......Page 259
12.6.3Interface Contracts and Service Contracts......Page 260
12.6.4Interoperability Standards......Page 261
Applications interoperability......Page 262
12.7.1Common Data and Functionality......Page 263
12.7.2Synchronization Mechanisms......Page 265
12.7.3Software Infrastructure......Page 266
12.8.2Reference Architectures......Page 267
12.8.3Architecture Frameworks......Page 269
12.8.4Patterns......Page 271
12.9.1Introduction......Page 273
12.9.2Types of Reuse......Page 274
12.9.3Business Case for Reuse......Page 278
12.9.4Context for Reuse......Page 279
12.10.1Introduction......Page 280
12.10.2Types of Standards......Page 281
12.10.3Value of Standards......Page 282
12.11.1Introduction......Page 284
12.11.2Information and Information Architecture......Page 285
12.11.3Enterprise Information Architecture......Page 286
12.11.4Real-Time Information Architecture......Page 291
12.12.1Introduction......Page 294
12.12.3Modeling Basics......Page 295
12.12.4Modeling Paradigms and Languages......Page 296
12.12.6Taxonomy......Page 297
12.12.7Ontology......Page 298
12.12.8Object-Oriented Software Technology......Page 300
12.12.9Domain-Specific Modeling......Page 301
12.13Formal Languages......Page 302
12.13.1Architecture Description Languages......Page 303
12.13.2Model Explosion......Page 304
12.13.3Structural Models......Page 305
12.13.4Domain Model......Page 306
12.13.5Business Object Model......Page 308
12.14.1Complexity......Page 312
12.14.2Complexity Tracking......Page 314
12.14.3Complexity Management......Page 315
12.14.4Active Simplification Step in Development Process......Page 316
References......Page 317
13.1Dependability and its Elements......Page 331
13.3.1Introduction......Page 334
13.3.2Policy Process......Page 335
13.4Resilience Architecture Principle #2: Vertical Architectures......Page 337
13.5Resilience Architecture Principle #3: Fault Containment Regions......Page 340
13.6Resilience Architecture Principle #4: Single Points of Failure......Page 342
13.7Resilience Architecture Principle #5: Multiple Lines of Defense......Page 345
13.8Resilience Architecture Principle #6: Fail-Safe States......Page 347
13.9Resilience Architecture Principle #7: Graceful Degradation......Page 349
13.10Resilience Architecture Principle #8: Dependable Foundation (Infrastructure)......Page 351
13.11Resilience Architecture Principle #9: Monitoring......Page 353
References......Page 355
14.1Introduction......Page 359
14.2.1Context......Page 361
14.2.2Information Protection......Page 363
14.3Functional Security......Page 366
14.3.1Infiltration......Page 367
14.3.2Malicious Modification......Page 368
14.3.3Secure Software Development......Page 369
14.4.1Introduction......Page 370
14.4.2Safety Analysis......Page 371
Safety Case......Page 374
14.4.4Safety-Systems Infrastructure......Page 375
14.5.1CPS and CPSoS......Page 377
14.5.2Internet of Things......Page 378
Emerging Properties......Page 379
References......Page 380
Conclusion......Page 386
References......Page 387
Index......Page 388