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OSGi and Equinox

Creating Highly Modular Java Systems

Addison Wesley (Hersteller)
978-0-13-438413-9 (ISBN)
31,15 inkl. MwSt
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<>A Hands-On Guide to Equinox and the OSGi Framework

In OSGI and Equinox: Creating Highly Modular Java (TM) Systems, three leading experts show developers-for the first time-exactly how to make the most of these breakthrough technologies for building highly modular dynamic systems.




You'll quickly get started with Eclipse bundle tooling, create your first OSGi-based system, and move rapidly to sophisticated production development. Next, you'll master best practices and techniques for creating systems with exceptional modularity and maintainability. You'll learn all about OSGi's Declarative Services and how to use them to solve a wide variety of real-world problems. Finally, you'll see everything that you've learned implemented in a complete case study project that takes you from early prototype through application delivery.




For every Eclipse developer, regardless of previous experience, this book



Combines a complete hands-on tutorial, online sample code at every step, and deep technical dives for working developers
Covers the OSGi programming model, component development, OSGi services, Eclipse bundle tooling, server-side Equinox, and much more
Offers knowledge, guidance, and best practices for overcoming the complexities of building modular systems
Addresses practical issues ranging from integrating third-party code libraries to server-side programming
Includes a comprehensive case study that goes beyond prototyping to deliver a fully refined
and refactored production system

Whatever your application, industry, or problem domain, if you want to build state-of-the-art software systems with OSGi and Equinox, you will find this book to be an essential resource.

Jeff McAffer co-leads the Eclipse RCP and Equinox OSGi projects, and is CTO and co-founder of EclipseSource. He is one of the architects of the Eclipse Platform and a coauthor of The Eclipse Rich Client Platform (Addison-Wesley) and OSGi and Equinox (Addison-Wesley). He co-leads the RT PMC and is a member of the Eclipse Project PMC, the Tools Project PMC and the Eclipse Foundation Board of Directors and the Eclipse Architecture Council. Jeff is currently interested all aspects of Eclipse components, from developing and building bundles to deploying, installing and ultimately running them. Previous lives include being a Senior Technical Staff Member at IBM, a team lead at Object Technology International covering work in Smalltalk, distributed/parallel OO computing, expert systems, meta-level architectures and a Ph.D. at the University of Tokyo. Paul VanderLei is a partner at Band XI International. He has more than 25 years of software engineering experience with an emphasis on object-oriented design and Agile practices. He is well-known for his innovative, yet straightforward, engineering solutions to complex problems. After earning his M.S. in Computer Science from Arizona State University, he joined Object Technology International and worked on a wide range of Smalltalk-based systems. After OTI's acquisition by IBM, Paul gained more than 10 years of experience developing embedded Java applications and user interfaces for the automotive and medical industry as a founding member of the IBM Embedded Java Enablement Team. He has been using OSGi in commercial applications since 2000 and is a coauthor of OSGi and Equinox (Addison-Wesley), a book on the proper construction of Java applications using OSGi. He lives in Grand Rapids, Michigan, with his wife and four children. Simon Archer has more than 16 years of software engineering experience with an emphasis on object-oriented design, Agile practices, and software quality. After earning his B.Sc. in Computer Science from the University of Portsmouth, UK, he worked as a Smalltalk developer at Knowledge System Corporation and later at Object Technology International, which was later acquired by IBM. While at OTI in 2000, Simon began working with and teaching OSGi in areas such as telematics and RFID. Today he works for IBM Rational using OSGi to build collaborative development tools for the Jazz Foundation project.

Foreword xxi

Preface xxv

Acknowledgments xxix

About the Authors xxxiii







Part I: Introduction 1

Chapter 1: OSGi, Equinox, and Eclipse 3

1.1 A Bit of History 3

1.2 Collaboration 4

1.3 Modularity and Freedom of Action 5

1.4 Platforms 7

1.5 Ecosystems 7

1.6 OSGi in Context 8

1.7 OSGi and Equinox in Practice 10

1.8 Summary 11



Chapter 2: OSGi Concepts 13

2.1 A Community of Bundles 13

2.2 Why OSGi? 15

2.3 The Anatomy of a Bundle 18

2.4 Modularity 19

2.5 Modular Design Concepts 21

2.6 Lifecycle 22

2.7 Collaboration 24

2.8 The OSGi Framework 26

2.9 Security 27

2.10 OSGi Framework Implementations 27

2.11 Summary 28





Part II: OSGi by Example 29

Chapter 3: Tutorial Introduction 31



3.1 What Is Toast? 31

3.2 The Evolution of Toast 34

3.3 Development Environment Installation 36

3.4 Sample Code 36

3.5 Target Platform Setup 39

3.6 Learning by Example 46

3.7 Summary 48



Chapter 4: Hello, Toast 49

4.1 A Simple Scenario 49

4.2 Slicing Toast into Bundles 56

4.3 Summary 65



Chapter 5: Services 67

5.1 Moving to Services 67

5.2 Registering the GPS Service 69

5.3 Registering the Airbag Service 75

5.4 Acquiring Services 79

5.5 Launching 81

5.6 Troubleshooting 82

5.7 Summary 83



Chapter 6: Dynamic Services 85

6.1 Introduction to Dynamic Services 85

6.2 Using Service Trackers 87

6.4 Using Declarative Services 97

6.5 Summary 105



Chapter 7: Client/Server Interaction 107

7.1 The Back End 108

7.2 The Client Side 111

7.3 Utility Classes 119

7.4 Running Toast 121

7.5 Summary 123



Chapter 8: Testing 125

8.1 Making Toast Testable 126

8.2 Unit-Testing Toast 126

8.3 System-Testing Toast 131

8.4 Summary 139



Chapter 9: Packaging 141

9.1 Defining a Toast Product 141

9.2 Exporting Toast 149

9.3 Packaging for Other Platforms 152

9.4 Getting Serious about Component Definition 154

9.5 Summary 158



Chapter 10: Pluggable Services 161

10.1 Separating Interface from Implementation 162

10.2 Device Simulation 165

10.3 Simulated Devices as Pluggable Services 167

10.4 Running with Simulated Devices 169

10.5 Summary 171



Chapter 11: Extensible User Interface 173

11.1 Crust 173

11.2 Emergency 175

11.3 Climate and Audio 181

11.4 The OSGi Application Model 184

11.5 Navigation and Mapping 187

11.6 Summary 195



Chapter 12: Dynamic Configuration 197

12.1 The Tracking Scenario 197

12.2 Installing the Tracking Code 198

12.3 Running the Basic Tracking Scenario 201

12.4 Configuration 201

12.5 Summary 205



Chapter 13: Web Portal 207

13.1 Portal 207

13.2 The PortalServlet 208

13.3 Action Lookup Using Services 210

13.4 Declaring a Portal Action 213

13.5 Whiteboard Pros and Cons 215

13.6 Summary 216



Chapter 14: System Deployment with p2 217

14.1 Introduction to Equinox p2 217

14.2 Refining the Toast Structure 221

14.3 Writing a Provisioner 229

14.4 Adding a Deployment Web UI 233

14.5 Exporting, Running, and Provisioning 235

14.6 Client-Side Dynamic Deployment 241

14.7 Summary 242





Part III: Deep Dives 245

Chapter 15: Declarative Services 247



15.1 The Declarative Services Model 247

15.2 Common Scenarios 248

15.3 Launching and Debugging DS Applications 269

15.4 PDE Tooling 270

15.5 Summary 273



Chapter 16: Extensions 275

16.1 The Extension Registry 275

16.2 Extension Points 278

16.3 Extensions 280

16.4 Advanced Extension Topics 281

16.5 Extension Registry Lifecycle 283

16.6 Dynamic Extension Scenarios 284

16.7 Services and Extensions 290

16.8 Extension Registry Myths 293

16.9 Summary 293



Chapter 17: Logging 295

17.1 The Log Service Specification 295

17.2 Using the LogService in Toast 298

17.3 Using the LogReaderService 301

17.4 Toast's LogUtility Class 303

17.5 Equinox's LogService Implementations 304

17.6 Summary 306



Chapter 18: HTTP Support 307

18.1 The HttpService 308

18.2 Registering and Unregistering a Servlet 309

18.3 Declarative HTTP Content Registrations 312

18.4 Using Jetty 313

18.5 HTTP Contexts and JAAS Integration 314

18.6 Troubleshooting 318

18.7 Summary 320



Chapter 19: Server Side 321

19.1 Servers and OSGi 322

19.2 Embedding the Back End in a Web Application 323

19.3 Remote Services in OSGi 333

19.4 Summary 341



Chapter 20: Release Engineering 343

20.1 What Is PDE Build? 344

20.2 Bundle build.properties 3 45

20.3 Setting Up a Builder 347

20.4 Running the Builder 353

20.5 Tweaking the Build 356

20.6 Building Add-on Features 363

20.7 Building WARs 367

20.8 Summary 367





Part IV: Reference 369

Chapter 21: Dynamic Best Practices 371



21.1 Dynamism and You 371

21.2 Dynamic Aspects of Toast 372

21.3 Dynamic Challenges 374

21.4 Dynamic Awareness 374

21.5 The Extender Pattern and BundleTracker 378

21.6 Dynamic Enablement 379

21.7 The Dynamics of Startup and Shutdown 382

21.8 Summary 385



Chapter 22: Integrating Code Libraries 387

22.1 JARs as Bundles 388

22.2 Bundling by Injection 388

22.3 Bundling by Wrapping 390

22.4 Bundling by Reference 392

22.5 Bundling Using bnd 394

22.6 Troubleshooting Class Loading Problems 394

22.7 Summary 403



Chapter 23: Advanced Topics 405

23.1 The Equinox Console 406

23.2 Roles in OSGi 409

23.3 The Shape of Bundles 411

23.4 Fragments 413

23.5 Singletons 415

23.6 Bundle Lifecycle 416

23.7 Bundle Activation Policy 419

23.8 Controlling Bundle Start 421

23.9 Class Loading 423

23.10 Configuring and Running Equinox 428

23.11 Data Areas 432

23.12 Summary 434



Chapter 24: Declarative Services Reference 435

24.1 Component XML Schema v1.1.0 435

24.2 The Component Lifecycle 444

24.3 Summary 457



Index 459

Verlagsort Boston
Sprache englisch
Gewicht 1 g
ISBN-10 0-13-438413-X / 013438413X
ISBN-13 978-0-13-438413-9 / 9780134384139
Zustand Neuware
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