| |
| |
| Preface | |
| |
| |
| How This Document Is Organized | |
| |
| |
| Related Publications | |
| |
| |
| International Technical Support Organization Publications | |
| |
| |
| ITSO Redbooks on the World Wide Web (WWW) | |
| |
| |
| International Technical Support Organization | |
| |
| |
| About the Authors | |
| |
| |
| Acknowledgments | |
| |
| |
| |
| The Need for Distributed Object Computing | |
| |
| |
| From Host Computing to Client/Server Computing | |
| |
| |
| Different Approaches: Fat Clients and Fat Servers | |
| |
| |
| From Procedural Computing to Object Computing | |
| |
| |
| Where Are We Today? Distributed Object Computing | |
| |
| |
| Evolution of Object-Oriented Computing | |
| |
| |
| Standards | |
| |
| |
| Benefits | |
| |
| |
| Onset of Network Computing | |
| |
| |
| Conclusions | |
| |
| |
| |
| The VisualAge Distributed Feature | |
| |
| |
| What Is the Distributed Feature? New Terms for Distribution | |
| |
| |
| Object Spaces | |
| |
| |
| Object References | |
| |
| |
| Shadow Objects | |
| |
| |
| Remote Objects | |
| |
| |
| Name Servers | |
| |
| |
| The IBM Smalltalk Distribution Toolkit | |
| |
| |
| Distributed Debugger | |
| |
| |
| Distribution Matrix | |
| |
| |
| Event Profiler | |
| |
| |
| Event Services Framework | |
| |
| |
| Name Server Browsers | |
| |
| |
| Name Server Distributed Part | |
| |
| |
| Object Visualizer | |
| |
| |
| Remote Browsers | |
| |
| |
| Remote File Dialog | |
| |
| |
| Remote Inspector | |
| |
| |
| Remote Transcript | |
| |
| |
| Remote Workspace | |
| |
| |
| SOM and DSOM and the Distributed Feature | |
| |
| |
| OMG's CORBA | |
| |
| |
| System Object Model (SOM) | |
| |
| |
| Distributed System Object Model (DSOM) | |
| |
| |
| VisualAge SOM/DSOM Support 33 Choosing Distributed Feature or SOM/DSOM Support | |
| |
| |
| |
| Applications Suitable for the Distributed Feature | |
| |
| |
| Object Server | |
| |
| |
| Active Server | |
| |
| |
| Peer-to-Peer Applications | |
| |
| |
| Applying the Distributed Feature | |
| |
| |
| Summary | |
| |
| |
| |
| Set Up the Development Environment | |
| |
| |
| Prerequisites | |
| |
| |
| Hardware Configuration | |
| |
| |
| Prerequisite Software | |
| |
| |
| TCP/IP Configuration | |
| |
| |
| Installation | |
| |
| |
| VisualAge for Smalltalk, Professional Server | |
| |
| |
| VisualAge for Smalltalk, Professional Client | |
| |
| |
| Additional Clients | |
| |
| |
| Server Activator File | |
| |
| |
| Verification | |
| |
| |
| TCP/IP Configuration | |
| |
| |
| Distributed Feature Configuration | |
| |
| |
| |
| A Quick Tour Through Distributed Object Land | |
| |
| |
| The Celsius/Fahrenheit Converter | |
| |
| |
| Building the Stand-alone Application | |
| |
| |
| Moving the Model Object to a Remote Object Space | |
| |
| |
| Accessing the Same Model Object from Two Clients | |
| |
| |
| Dividing the Application | |
| |
| |
| Using the Distribution Matrix | |
| |
| |
| Real Distribution: Using a Distribution Matrix for the Run-time Scenario | |
| |
| |
| Experiences | |
| |
| |
| |
| The Foreign Currency Exchange Application | |
| |
| |
| The Original (Nondistributed) FCE Application | |
| |
| |
| Requirements Specifications Summary | |
| |
| |
| The Object Model | |
| |
| |
| The Nondistributed Implementation | |
| |
| |
| Scenarios for a Distributed FCE Application | |
| |
| |
| Object Server: Currency Management | |
| |
| |
| Active Server: Exchange Rate Management | |
| |
| |
| Peer-to-Peer: Trading Currencies Between Banks | |
| |
| |
| The Residency Project | |
| |
| |
| |
| Planning a Distributed OO Development Project | |
| |
| |
| Considerations for Distribution Using the Visual Modeling Technique | |
| |
| |
| Project Team Structure: Roles and Responsibilities | |
| |
| |
| Iterative Development | |
| |
| |
| Incremental Development | |
| |
| |
| |
| Designing Distributed Object Applications | |
| |
| |
| System Design Considerations | |
| |
| |
| Object Design Considerations | |
| |
| |
| Distribution Techniques | |
| |
| |
| |
| An Approach to VisualAge Application Architecture | |
| |
| |
| Introduction | |
| |
| |
| Implementation of Layering Within the Residency Project | |
| |
| |
| A User Interface Class: EmsCurrencyListView | |
| |
| |
| A Business Domain Class: EmsCurrencyList | |
| |
| |
| An Infrastructure Class: EmsPersistenceManager | |
| |
| |
| Implementation of Instance Uniqueness Within the Residency Project | |
| |
| |
| A New Superclass: EmsUniquePart | |
| |
| |
| Singleton Classes | |
| |
| |
| Questions to Be Addressed | |
| |
| |
| |
| Introduction to the Distributed FCE Case Study | |
| |
| |
| |
| The First Iteration | |
| |
| |
| Overview | |
| |
| |
| Business Domain and Infrastructure Layers | |
| |
| |
| The User Interface Layer | |
| |
| |
| Testing and Distributing the Application | |
| |
| |
| Performance Analysis | |
| |
| |
| Visualizing the Application Before Distribution | |
| |
| |
| Profiling the Application After Distribution | |
| |
| |
| Conclusions | |
| |
| |
| |
| The Second Iteration | |
| |
| |
| Overview | |
| |
| |
| Applying the Golden Rules | |
| |
| |
| Maximizing Local References | |
| |
| |
| Minimizing Remote Messages | |
| |
| |
| Adding the Dependency Mechanism and Parallel Processing | |
| |
| |
| Performance Analysis | |
| |
| |
| Profiling the Local Client | |
| |
| |
| Conclusions | |
| |
| |
| |
| The Third Iteration | |
| |
| |
| Overview | |
| |
| |
| Creating Local Copies of Remote Objects | |
| |
| |
| Controlling Message Flow Between Object Spaces | |
| |
| |
| Performance Analysis | |
| |
| |
| Profiling the Local Client: Last Pass | |
| |
| |
| Conclusions | |
| |
| |
| |
| Applying the Event Services Framework | |
| |
| |
| Using a Single Event Channel for Each Server Currency | |
| |
| |
| Using Two Event Channels for Each Server Currency | |
| |
| |
| |
| Testing Distributed Applications | |
| |
| |
| Model Testing | |
| |
| |
| Class and Unit Testing | |
| |
| |
| Integration Testing | |
| |
| |
| |
| Run-time Configuration Considerations | |
| |
| |
| Building the Final Product | |
| |
| |
| Preparation | |
| |
| |
| Packaging the Application | |
| |
| |
| Keeping Application Components in Sync | |
| |
| |
| |
| Optimization and Performance Tuning | |
| |
| |
| The Golden Rules | |
| |
| |
| First Rule: Maximize Local References | |
| |
| |
| Second Rule: Minimize Remote Messages | |
| |
| |
| Third Rule: Do Not Wait Unless You Have To | |
| |
| |
| Optimization Through Design | |
| |
| |
| Iterations of Distribution Design | |
| |
| |
| Object Copy Management | |
| |
| |
| Object Space Layering | |
| |
| |
| Uniqueness of Instances | |
| |
| |
| Preconnect Object Spaces | |
| |
| |
| Optimization Summary | |
| |
| |
| |
| Lessons Learned, Hints, and Tips | |
| |
| |
| Experiences During the Quick Tour | |
| |
| |
| Modal Dialogs | |
| |
| |
| Explicit Notification Mechanisms | |
| |
| |
| Configuration Management | |
| |
| |
| Development and Setup | |
| |
| |
| Concurrency | |
| |
| |
| Using Callbacks | |
| |
| |
| Further Hints and Tips | |
| |
| |
| |
| Requirements Specifications | |
| |
| |
| Branch Functions | |
| |
| |
| Central Bank Functions | |
| |
| |
| |
| Database Definition | |
| |
| |
| COUNTRY Table | |
| |
| |
| CURRENCY Table | |
| |
| |
| |
| Sample Code | |
| |
| |
| First Iteration | |
| |
| |
| EmsCurrencyEditView | |
| |
| |
| EmsCurrencyListView | |
| |
| |
| EmsInternationalOOBankAppView | |
| |
| |
| EmsCountry | |
| |
| |
| EmsCurrency | |
| |
| |
| EmsCurrencyList | |
| |
| |
| EmsFceDatabaseAccessSet | |
| |
| |
| EmsPersistenceManager | |
| |
| |
| EmsUniquePart | |
| |
| |
| Second Iteration | |
| |
| |
| EmsCurrency | |
| |
| |
| EmsPersistenceManager | |
| |
| |
| EmsUniquePart | |
| |
| |
| EmsExchangeRate | |
| |
| |
| Third Iteration | |
| |
| |
| EmsCurrency | |
| |
| |
| EmsCurrencyList | |
| |
| |
| EmsPersistenceManager | |
| |
| |
| EmsUniquePart | |
| |
| |
| List of Abbreviations | |
| |
| |
| Bibliography | |
| |
| |
| Index | |