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Enterprise Services with the .NET Framework
Developing Distributed Business Solutions with .NET Enterprise Services
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.NET Enterprise Services is a managed class in COM+ that allows developers
to build scalable applications quickly and easily, by automated business
solutions, rather than writing code from scratch. .NET Enterprise Services are
delivered as a part of the Windows 2003 operating system, and also work with
Web Services. While Microsoft is currently encouraging developers to build
distributed applications using Enterprise Services, there is little information
available.
Enterprise Services with the .NET Framework responds to the needs of all
developers looking to build and automate business solutions using the .NET
Framework. It is the only book that clearly explains what .NET Enterprise
Services are and how to use them to build effective distributed business
applications. It presents the big picture of .NET Enterprise Services using clear
explanations and practical examples. It discusses the architecture using
straightforward language and demonstrates how to use all of the Enterprise
Services technologies to develop scalable distributed applications.
Features + Benefits
The only book to clearly explain what .NET Enterprise Services are and how to use them to build effective scaleable business applications
° The first book in English to cover .NET Enterprise Services, a key new technology from Microsoft
° Learn how to build scalable business applications quickly and more easily
° Discover how to integrate .NET components with existing COM-based applications
° Author is a respected and visible member of the .NET Development community.
Backcover
For anyone involved in the .NET community, it's hard to not have heard of Christian Nagel. Christian is a true heavyweight of .NET in general, and Enterprise Services in particular. By taking a relatively trivial application and architecting it in a way that would allow it to scale without any rework, users will find that using the techniques employed in this book will be of benefit to virtually any company that is running distributed or enterprise applications.
-William G. Ryan, Microsoft MVP, Senior Software Developer, TiBA Soutions, LLC
Whether you are a seasoned architect or a new developer, distributed application development can be difficult, since it covers such a wide range of complex technologies. Until now there was precious little in the way of guidance-let alone a consolidated reference. Christian has provided that reference and more-going from the individual technologies to the big picture on how to architect and develop scalable distributed applications. Technical goodness through and through!
-Clayton Burt, Managing Partner, Onzo, LLC
Making the transition to distributed application architecture introduces many issues in security and deployment and requires a new way of thinking about events, transactions, and messaging. This book shows developers and architects alike how to use .NET Enterprise Services to create robust, secure, and maintainable applications in a distributed environment. This book is an excellent guide to the sometimes overwhelming field of .NET Enterprise Services.
-Brian Davis, Director of Software Development, InfoPro Group, Inc., Co-Creator, KnowDotNet.com
Enterprise Services with the .NET Framework is the only book that experienced .NET developers need to learn how to write distributed, service-oriented applications. Filled with clear examples in C# (with Visual Basic .NET examples available on the Web), this book will quickly get you up to speed on building distributed applications with serviced components. You'll also learn about Indigo, Microsoft's next-generation technology for building distributed applications, and how it compares to Enterprise Services.
Microsoft Regional Director, MVP, and veteran author Christian Nagel introduces and clearly explains the four major services included in Enterprise Services: Automatic Transactions, Queued Components, Loosely Coupled Events, and Role-Based Security. From his in-depth coverage, you'll learn
How to create a serviced component, how serviced objects are activated, and how to use the different kinds of object contexts
How to manage concurrency and synchronization for serviced components to achieve optimal performance and data integrity
How to integrate COM components with the .NET Framework
How to use serviced components over a network with DCOM, SOAP Services, and ASP.NET Web services
How to use .NET Enterprise Services transactions to achieve Atomicity, Consistency, Isolation, and Durability
How to build a compensating resource manager to allow your own resources to participate in Enterprise Services transactions
How to maintain application state in a client application, in a serviced component, in shared properties, or in a database
How to create and use Loosely Coupled Events using COM+
How to secure a distributed solution using authorization, authentication, impersonation, and confidentiality
How to deploy and configure Enterprise Services applications
© Copyright Pearson Education. All rights reserved.
About the Author
Foreword
Preface
Acknowledgments
1. Introducing .NET Enterprise Services.
Building Applications
Application Layers
Logical Tiers and Physical Systems
Clustering Solutions
Service-Oriented Architecture
Smart Clients
The History of Application Services
COM and .NET
Microsoft Transaction Server
COM+ 1.0
.NET Enterprise Services
Applications and Components
Declarative Programming
Catalog
Administration
Application Services
Automatic Transactions
Queued Components
Loosely Coupled Events
Role-Based Security
New Features with COM+ 1.5
Summary
2. Object Activation and Contexts.
Contexts
.NET Remoting Contexts
Contexts with Serviced Components
Mixing .NET and COM+ Contexts
Creating a Serviced Component
Assembly Attributes
Signing the Assembly
Global Assembly Cache
Using Interfaces
ServicedComponent Class
Component Registration
Client Applications
Debugging
Library Applications
Server Applications
Object Activation
Construction Strings
Just-in-Time Activation (JITA)
JITA and Object Disposing
Object Pooling
Private Components
Application Activation
Summary
3. Concurrency.
Synchronization Overview
Using Locks
Interlocked Class
More Synchronization Options
Apartments
Single-Threaded Apartments
Multithreaded Apartments
Thread-Neutral Apartments
.NET Enterprise Services Synchronization
Activity
Configuring Synchronization
Synchronization Example
Reentrancy
Selecting the Synchronization Option
Services Without Components
ServiceDomain Class
ServiceConfig Class
Activity Class
Using a New Activity
Starting a New Context
Summary
4. COM Interop.
.NET Clients Without COM Interop
Side-by-Side Support
COM Interoperability
COM Callable Wrappers and Runtime Callable Wrappers
Default COM Configuration
Generated Type Library
COM Interface Types
Custom Interfaces
Dispatch Interfaces
Dual Interfaces
ComVisible Attribute
Versioning
Applications
Components
Interfaces
COMCompatibleVersion Attribute
Finding Assemblies
Private and Shared Assemblies
COM Registry Entries
COM and .NET Requirements
Visual Basic 6 Clients
C++ COM Clients
Scripting Clients
Calling a COM Object
C++ Component
Runtime Callable Wrapper
.NET Component
Registration
Client Application
Summary
5. Networking.
DCOM
DCOM Transport Protocols
Application Proxies
Creating an Application Proxy
Installing the Application Proxy
Creating a DCOM Client Application
SOAP Services
.NET Remoting Overview
Creating a Serviced Component Using .NET Remoting
Configuring the Server Application
Creating a .NET Remoting Client
Disadvantages of SOAP Services
Web Services
Overview
Implementing a Web Service with ASP.NET
Creating a Proxy
Summary
6. Data Access.
ADO.NET Overview
Sample Database
Entity Classes
Database Access
Database Query
Insert
Update
Calling Stored Procedures
Datasets
Filling Datasets
Updating Datasets
Summary
7. Transaction Services.
Transaction Overview
ACID Properties
Distributed Transactions
Programmatic Transactions
Automatic Transactions
Transaction Attributes
Transaction Streams
Transaction Outcomes
ContextUtil Methods
Automatic Transaction Example
Setting the Transactional Vote
&nbs
to build scalable applications quickly and easily, by automated business
solutions, rather than writing code from scratch. .NET Enterprise Services are
delivered as a part of the Windows 2003 operating system, and also work with
Web Services. While Microsoft is currently encouraging developers to build
distributed applications using Enterprise Services, there is little information
available.
Enterprise Services with the .NET Framework responds to the needs of all
developers looking to build and automate business solutions using the .NET
Framework. It is the only book that clearly explains what .NET Enterprise
Services are and how to use them to build effective distributed business
applications. It presents the big picture of .NET Enterprise Services using clear
explanations and practical examples. It discusses the architecture using
straightforward language and demonstrates how to use all of the Enterprise
Services technologies to develop scalable distributed applications.
Features + Benefits
The only book to clearly explain what .NET Enterprise Services are and how to use them to build effective scaleable business applications
° The first book in English to cover .NET Enterprise Services, a key new technology from Microsoft
° Learn how to build scalable business applications quickly and more easily
° Discover how to integrate .NET components with existing COM-based applications
° Author is a respected and visible member of the .NET Development community.
Backcover
For anyone involved in the .NET community, it's hard to not have heard of Christian Nagel. Christian is a true heavyweight of .NET in general, and Enterprise Services in particular. By taking a relatively trivial application and architecting it in a way that would allow it to scale without any rework, users will find that using the techniques employed in this book will be of benefit to virtually any company that is running distributed or enterprise applications.
-William G. Ryan, Microsoft MVP, Senior Software Developer, TiBA Soutions, LLC
Whether you are a seasoned architect or a new developer, distributed application development can be difficult, since it covers such a wide range of complex technologies. Until now there was precious little in the way of guidance-let alone a consolidated reference. Christian has provided that reference and more-going from the individual technologies to the big picture on how to architect and develop scalable distributed applications. Technical goodness through and through!
-Clayton Burt, Managing Partner, Onzo, LLC
Making the transition to distributed application architecture introduces many issues in security and deployment and requires a new way of thinking about events, transactions, and messaging. This book shows developers and architects alike how to use .NET Enterprise Services to create robust, secure, and maintainable applications in a distributed environment. This book is an excellent guide to the sometimes overwhelming field of .NET Enterprise Services.
-Brian Davis, Director of Software Development, InfoPro Group, Inc., Co-Creator, KnowDotNet.com
Enterprise Services with the .NET Framework is the only book that experienced .NET developers need to learn how to write distributed, service-oriented applications. Filled with clear examples in C# (with Visual Basic .NET examples available on the Web), this book will quickly get you up to speed on building distributed applications with serviced components. You'll also learn about Indigo, Microsoft's next-generation technology for building distributed applications, and how it compares to Enterprise Services.
Microsoft Regional Director, MVP, and veteran author Christian Nagel introduces and clearly explains the four major services included in Enterprise Services: Automatic Transactions, Queued Components, Loosely Coupled Events, and Role-Based Security. From his in-depth coverage, you'll learn
How to create a serviced component, how serviced objects are activated, and how to use the different kinds of object contexts
How to manage concurrency and synchronization for serviced components to achieve optimal performance and data integrity
How to integrate COM components with the .NET Framework
How to use serviced components over a network with DCOM, SOAP Services, and ASP.NET Web services
How to use .NET Enterprise Services transactions to achieve Atomicity, Consistency, Isolation, and Durability
How to build a compensating resource manager to allow your own resources to participate in Enterprise Services transactions
How to maintain application state in a client application, in a serviced component, in shared properties, or in a database
How to create and use Loosely Coupled Events using COM+
How to secure a distributed solution using authorization, authentication, impersonation, and confidentiality
How to deploy and configure Enterprise Services applications
© Copyright Pearson Education. All rights reserved.
About the Author
Foreword
Preface
Acknowledgments
1. Introducing .NET Enterprise Services.
Building Applications
Application Layers
Logical Tiers and Physical Systems
Clustering Solutions
Service-Oriented Architecture
Smart Clients
The History of Application Services
COM and .NET
Microsoft Transaction Server
COM+ 1.0
.NET Enterprise Services
Applications and Components
Declarative Programming
Catalog
Administration
Application Services
Automatic Transactions
Queued Components
Loosely Coupled Events
Role-Based Security
New Features with COM+ 1.5
Summary
2. Object Activation and Contexts.
Contexts
.NET Remoting Contexts
Contexts with Serviced Components
Mixing .NET and COM+ Contexts
Creating a Serviced Component
Assembly Attributes
Signing the Assembly
Global Assembly Cache
Using Interfaces
ServicedComponent Class
Component Registration
Client Applications
Debugging
Library Applications
Server Applications
Object Activation
Construction Strings
Just-in-Time Activation (JITA)
JITA and Object Disposing
Object Pooling
Private Components
Application Activation
Summary
3. Concurrency.
Synchronization Overview
Using Locks
Interlocked Class
More Synchronization Options
Apartments
Single-Threaded Apartments
Multithreaded Apartments
Thread-Neutral Apartments
.NET Enterprise Services Synchronization
Activity
Configuring Synchronization
Synchronization Example
Reentrancy
Selecting the Synchronization Option
Services Without Components
ServiceDomain Class
ServiceConfig Class
Activity Class
Using a New Activity
Starting a New Context
Summary
4. COM Interop.
.NET Clients Without COM Interop
Side-by-Side Support
COM Interoperability
COM Callable Wrappers and Runtime Callable Wrappers
Default COM Configuration
Generated Type Library
COM Interface Types
Custom Interfaces
Dispatch Interfaces
Dual Interfaces
ComVisible Attribute
Versioning
Applications
Components
Interfaces
COMCompatibleVersion Attribute
Finding Assemblies
Private and Shared Assemblies
COM Registry Entries
COM and .NET Requirements
Visual Basic 6 Clients
C++ COM Clients
Scripting Clients
Calling a COM Object
C++ Component
Runtime Callable Wrapper
.NET Component
Registration
Client Application
Summary
5. Networking.
DCOM
DCOM Transport Protocols
Application Proxies
Creating an Application Proxy
Installing the Application Proxy
Creating a DCOM Client Application
SOAP Services
.NET Remoting Overview
Creating a Serviced Component Using .NET Remoting
Configuring the Server Application
Creating a .NET Remoting Client
Disadvantages of SOAP Services
Web Services
Overview
Implementing a Web Service with ASP.NET
Creating a Proxy
Summary
6. Data Access.
ADO.NET Overview
Sample Database
Entity Classes
Database Access
Database Query
Insert
Update
Calling Stored Procedures
Datasets
Filling Datasets
Updating Datasets
Summary
7. Transaction Services.
Transaction Overview
ACID Properties
Distributed Transactions
Programmatic Transactions
Automatic Transactions
Transaction Attributes
Transaction Streams
Transaction Outcomes
ContextUtil Methods
Automatic Transaction Example
Setting the Transactional Vote
&nbs
.NET Enterprise Services is a managed class in COM+ that allows developers
to build scalable applications quickly and easily, by automated business
solutions, rather than writing code from scratch. .NET Enterprise Services are
delivered as a part of the Windows 2003 operating system, and also work with
Web Services. While Microsoft is currently encouraging developers to build
distributed applications using Enterprise Services, there is little information
available.
Enterprise Services with the .NET Framework responds to the needs of all
developers looking to build and automate business solutions using the .NET
Framework. It is the only book that clearly explains what .NET Enterprise
Services are and how to use them to build effective distributed business
applications. It presents the big picture of .NET Enterprise Services using clear
explanations and practical examples. It discusses the architecture using
straightforward language and demonstrates how to use all of the Enterprise
Services technologies to develop scalable distributed applications.
to build scalable applications quickly and easily, by automated business
solutions, rather than writing code from scratch. .NET Enterprise Services are
delivered as a part of the Windows 2003 operating system, and also work with
Web Services. While Microsoft is currently encouraging developers to build
distributed applications using Enterprise Services, there is little information
available.
Enterprise Services with the .NET Framework responds to the needs of all
developers looking to build and automate business solutions using the .NET
Framework. It is the only book that clearly explains what .NET Enterprise
Services are and how to use them to build effective distributed business
applications. It presents the big picture of .NET Enterprise Services using clear
explanations and practical examples. It discusses the architecture using
straightforward language and demonstrates how to use all of the Enterprise
Services technologies to develop scalable distributed applications.