Comandos Distributed Application Platform

1 Introduction.- 1.1 Rationale, Scope and Objectives.- 1.2 Object-Oriented Approach.- 1.3 The Comandos Model.- 1.4 Programming with the Comandos Model.- 1.5 Structure of the Comandos Platform.- 1.6 The Comandos Virtual Machine.- 1.7 The Comandos Virtual Machine Interface.- 1.8 Application Services.- 1.9 Management Tools.- 1.10 Comandos and the Rest of the World.- 1.10.1 Comandos and the Open Software Foundation.- 1.10.2 Comandos and UNIX International.- 1.10.3 Comandos and the Object Management Group.- 1.11 What is Comandos Added Value?.- 1.12 Road-map of the Book.- I User's View of the Comandos Platform.- 2 Overview of the Comandos Platform.- 2.1 Basic Features.- 2.1.1 Transparent Access to Resources and Services.- 2.1.2 Persistence.- 2.1.3 Concurrency.- 2.1.4 Atomicity.- 2.1.5 Sharing.- 2.2 Interwdrking Between Languages.- 2.2.1 Manual Approach.- 2.2.2 Automated Approach.- 2.3 Data Management.- 2.4 Security.- 2.5 Management View of the Platform.- 2.6 Interworking with UNIX.- 2.7 Structure of the Platform.- 2.7.1 The Comandos System.- 2.7.2 Application Services and Management Tools.- 3 The Comandos Virtual Machine.- 3.1 Object Model.- 3.1.1 Comandos Objects.- 3.1.2 Global Names.- 3.1.3 Object Invocation.- 3.2 Security Model.- 3.2.1 Security Domains, Users and Groups.- 3.2.2 Isolation.- 3.2.3 Authorisation.- 3.2.4 Security Levels.- 3.3 Execution Model.- 3.3.1 Job and Activity Operation.- 3.3.2 Job and Activity Control.- 3.4 Transaction Model.- 3.4.1 Transaction Options.- 3.4.2 Job and Activity Model for Transactions.- 4 Supported Programming Languages.- 4.1 C++.- 4.1.1 Type Model.- 4.1.2 Distribution.- 4.1.3 Persistence.- 4.1.4 Concurrency.- 4.1.5 Storage.- 4.1.6 Transactions.- 4.1.7 Exceptions.- 4.1.8 Implementation.- 4.2 Eiffel.- 4.2.1 Type Model.- 4.2.2 Persistence.- 4.2.3 Distribution.- 4.2.4 Concurrency.- 4.2.5 Storage.- 4.2.6 Transactions.- 4.2.7 Exceptions.- 4.2.8 Implementation.- 4.3 The Comandos Object-Oriented Language.- 4.3.1 Type Model.- 4.3.2 Persistence.- 4.3.3 Distribution.- 4.3.4 Concurrency.- 4.3.5 Transactions.- 4.3.6 Exceptions.- 4.3.7 Implementation.- 5 Development Tools.- 5.1 The Distributed Debugger.- 5.1.1 Printing the Content of an Object.- 5.1.2 Execution Control.- 5.1.3 Eliminating Non-deterministic Behaviour.- 5.2 The User Interface Development System.- 5.3 The Type Manager.- 5.3.1 Canonical Type Model.- 5.3.2 The Type Manager Architecture.- 5.3.3 The Management of Units.- 5.3.4 The Creation of Types.- 5.3.5 The Storage and Retrieval of Type Information.- 5.3.6 The Process of Language Registration.- 5.3.7 The Process of Compilation.- 6 The Object Data Management Service.- 6.1 Data Model.- 6.2 Operational Model.- 6.3 Structure.- 6.3.1 The Aggregate Layer.- 6.3.2 The Bulk Layer.- 6.3.3 The Collection Layer.- 6.4 The Programmer's Interface.- 6.4.1 Basics.- 6.4.2 The Data and Storage Definition Language.- 6.4.3 The Data Manipulation Sub-language.- 6.5 Summary.- 7 Management Tools.- 7.1 The Distributed Directory Service.- 7.1.1 Functional Model.- 7.1.2 Directory Services.- 7.1.3 The Distributed Directory Service Architecture.- 7.2 Management and Administration Tools.- 7.2.1 The System Observation Facility.- 7.2.2 The System Control Facility.- 7.2.3 User and Host Administration.- 7.2.4 The Distributed Information System Designer.- 7.3 Security Tools.- 7.3.1 Protocol Data Analysis Tool.- 7.3.2 Risk Management.- 7.4 Relationships Between Tools.- 8 The CIDRE Application.- 8.1 Description of the Pilot Application.- 8.1.1 Functions.- 8.1.2 Architecture.- 8.2 CIDRE Design and Implementation.- 8.2.1 Use of the Type Model.- 8.2.2 Use of the Computational Model.- 8.2.3 Persistent Objects.- 8.2.4 Integration with UNIX.- 8.2.5 Use of Comandos Services.- 8.3 Evaluation.- 8.3.1 Model and Language.- 8.3.2 Architecture.- 8.3.3 Conclusion.- II Implementor's View of the Comandos Platform.- 9 Virtual Machine Interface.- 9.1 The Virtual Machine Architecture.- 9.2 Virtual Object Memory.- 9.2.1 Context Services.- 9.2.2 Global Services.- 9.3 Execution Sub-system.- 9.3.1 Job and Activity Management.- 9.3.2 Synchronisation Support.- 9.3.3 Exception Handling.- 9.4 Storage Sub-system.- 9.4.1 Container Management.- 9.4.2 Segments.- 9.4.3 Object Migration and Clustering.- 9.4.4 Ageing in the Storage Sub-system.- 9.5 Transaction Sub-system.- 9.5.1 Transaction Management.- 9.6 Communication Sub-system.- 9.6.1 Remote Invocation Support.- 9.6.2 Reliable Broadcast Protocol.- 9.7 Protection Sub-system.- 9.7.1 Authorisation.- 9.7.2 Secure Transmission.- 9.7.3 Auditing.- 10 Implementing the Virtual Machine.- 10.1 The Amadeus Platform.- 10.1.1 Basic Design Decisions and Assumptions.- 10.1.2 The Structure of Amadeus.- 10.1.3 Node Management.- 10.1.4 The Storage Sub-system.- 10.1.5 User and Extent Management.- 10.1.6 Context Management.- 10.1.7 Cluster Location.- 10.1.8 Cluster Fault Handling.- 10.1.9 Address Resolution.- 10.1.10 The Object Manager.- 10.1.11 Cluster Management.- 10.1.12 Job and Activity Management.- 10.1.13 Load Balancing.- 10.1.14 Transaction Management.- 10.1.15 Communications.- 10.1.16 Thread Management.- 10.2 Other Implementations.- 10.2.1 CHORUS.- 10.2.2 Mach.- 11 Interfacing a Language to the Virtual Machine.- 11.1 The Generic Run-time.- 11.1.1 Down-calls.- 11.1.2 Up-calls.- 11.2 The Eiffel Run-time.- 11.2.1 Types and Objects.- 11.2.2 Object Layout.- 11.2.3 ERT Data Structures for a Class.- 11.2.4 Object Creation, Access and Invocation.- 11.2.5 Functionality Provided by the ERT.- 11.3 Persistence.- 11.3.1 Interfacing the ERT and GRT.- 11.3.2 Down-calls.- 11.3.3 Problems in the Implementation of Persistence.- 11.3.4 Compilation.- 11.4 Distribution.- 11.4.1 Calling Mechanism.- 11.4.2 Code Generation.- 11.4.3 Up-calls for Distribution.- 11.4.4 Problems in Distribution.- 11.5 Concurrency.- 11.5.1 Implementation.- 11.6 Transactions.- 11.7 Conclusion.- 12 Conclusions.- 12.1 The Challenge of Distributed Computing and the Promise of the Comandos Technology.- 12.2 Benefits of the Comandos Technology.- 12.2.1 Main Benefits for the Application Developer.- 12.2.2 Main Benefits for the End-user.- 12.3 Industrial Achievements.- 12.4 Research Achievements.- A Example Programs.- A.1 Specification of the SimpleMail Application.- A.2 C++.- A.2.1 Application Mainline.- A.2.2 Class Mailer.- A.2.3 Class Mail Directory.- A.2.4 Class Mailbox.- A.2.5 Class Message.- A.2.6 Utility and Library Classes.- A.3 Eiffel.- A.3.1 Application Mainline.- A.3.2 Class Mailer.- A.3.3 Class MaiLDirectory.- A.3.4 Class Mailbox.- A.3.5 Class Message.- A.3.6 Utility and Library Classes.- A.4 Guide.- A.4.1 Class Mailer.- A.4.2 Class MaiLDirectory.- A.4.3 Class Mailbox.- A.4.4 Class Message.- A.4.5 Utility and Library Classes.- B Available Software.- C Comandos Glossary.- D Abbreviations.- E Comandos Publications.- E.1 Papers and Reports.- E.2 Project Deliverables.- References.