Expert Service-Oriented Architecture in C# 2005

271 Pages·2006·3.564 MB·English

by  Mauricio Duran, Jeffrey Hasan

CYAN YELLOW
MAGENTA BLACK
PANTONE 123 CV
BOOKS FOR PROFESSIONALS BY PROFESSIONALS® THE EXPERT’S VOICE® IN.NET
Companion
eBook
Available
Expert Service-Oriented Architecture
Expert
in C# 2005,
SECOND EDITION
S
Dear Reader, e
r
Service-oriented architecture (SOA) is a new, evolving model for building distrib- v
uted applications. SOA is built on loosely coupled components that exchange i Expert
c
SOAP/XML messages. Web services are a key component in SOA because they
e
exchange messages. Until recently, XML Web services built in ASP.NET have been
Jeffrey Hasan -
unable to support business-critical systems because they lacked important
O
Performance Tuning and
service guarantees: security, reliability, and performance. This has now
Optimizing ASP.NET r Service-Oriented
changed with the release of Web Services Enhancements 3.0 (WSE).
Applications i
WSE 3.0 is a powerful complement to ASP.NET that allows you to build the e
Professional .NET next generation of Web services. WSE 3.0 implements industry-standard Web n
Framework service specifications, including WS-Security and WS-Addressing, for building t
e
ADO.NET Programmer’s truly interoperable Web services that are not tied to a single vendor. WSE 3.0
Reference d
integrates with the ASP.NET processing pipeline to provide advanced support

Professional VB6 Web for secure, reliable XML messages. In addition, WSE 3.0 provides an intuitive, A Architecture C# 2005
Programming flexible application programming interface that automatically generates the r in
SOAP message attributes for secure, reliable messages. c
h
We wrote this book because we are passionate about SOA and Web services
development. Our book teaches you the concepts behind SOA and shows you it
in very practical terms how to build business-critical Web services using e
ASP.NET and WSE 3.0. Our book will show you how to take your Web services c
development to the next level using the best of today’s technology. t
u
Prepare to be informed, and prepare to be inspired! r
e
Jeffrey Hasan, M.Sc., MCSD, and Mauricio Duran, MCP i Defining Web services development with ASP.NET and WSE 3.0
n

C
#

2
Join online discussions:
0
Companion eBook
SOURCECODEONLINE forums.apress.com 0 SECOND EDITION
FOR PROFESSIONALS BY PROFESSIONALS™ 5
www.apress.com
SECOND
See last page for details
EDITION
on $10 eBook version
Jeffrey Hasan
ISBN 1-59059-701-X
53999 DH
ua
rs with Mauricio Duran
aa
nn
US $39.99 ,
Shelve in
.NET
6 89253 59701 9 9 781590 597019
User level:
Advanced
this print for content only—size & color not accurate spine = 0.638" 272 page count
701xFM.qxd 7/14/06 5:43 PM Page i
Expert Service-Oriented
Architecture in C# 2005
Second Edition
Jeffrey Hasan with Mauricio Duran
701xFM.qxd 7/14/06 5:43 PM Page ii
Expert Service-Oriented Architecture in C# 2005,Second Edition
Copyright © 2006 by Jeffrey Hasan,Mauricio Duran
All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means,
electronic or mechanical, including photocopying, recording, or by any information storage or retrieval
system, without the prior written permission of the copyright owner and the publisher.
ISBN-13 (pbk): 978-1-59059-701-9
ISBN-10 (pbk): 1-59059-701-X
Printed and bound in the United States of America 9 8 7 6 5 4 3 2 1
Trademarked names may appear in this book. Rather than use a trademark symbol with every occurrence
of a trademarked name, we use the names only in an editorial fashion and to the benefit of the trademark
owner, with no intention of infringement of the trademark.
Lead Editor: Jonathan Hassell
Technical Reviewers: Mathew Upchurch, Omar Del Rio
Editorial Board: Steve Anglin, Dan Appleman, Ewan Buckingham, Gary Cornell, Jason Gilmore,
Jonathan Hassell, James Huddleston, Chris Mills, Matthew Moodie, Dominic Shakeshaft,
Jim Sumser, Matt Wade
Project Manager: Richard Dal Porto
Copy Edit Manager: Nicole LeClerc
Copy Editors: Jennifer Whipple, Ami Knox
Assistant Production Director: Kari Brooks-Copony
Production Editor: Ellie Fountain
Compositor: Dina Quan
Proofreader: Liz Welch
Indexer: Michael Brinkman
Artist: Kinetic Publishing Services, LLC
Cover Designer: Kurt Krames
Manufacturing Director: Tom Debolski
Distributed to the book trade worldwide by Springer-Verlag New York, Inc., 233 Spring Street, 6th Floor,
New York, NY 10013. Phone 1-800-SPRINGER, fax [phone], e-mail [email protected], or
visit http://www.springeronline.com.
For information on translations, please contact Apress directly at 2560 Ninth Street, Suite 219, Berkeley,
CA 94710. Phone [phone], fax [phone], e-mail [email protected], or visit http://www.apress.com.
The information in this book is distributed on an “as is” basis, without warranty. Although every precaution
has been taken in the preparation of this work, neither the author(s) nor Apress shall have any liability
toany person or entity with respect to any loss or damage caused or alleged to be caused directly or
indirectly by the information contained in this work.
The source code for this book is available to readers at http://www.apress.comin the Source Code section.
701xFM.qxd 7/14/06 5:43 PM Page iii
Contents at a Glance
About the Authors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
About the Technical Reviewers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
■ CHAPTER 1 Introducing Service-Oriented Architecture . . . . . . . . . . . . . . . . . . . . . . 1
■ CHAPTER 2 The Web Services Description Language . . . . . . . . . . . . . . . . . . . . . . . 15
■ CHAPTER 3 Design Patterns for Building Message-Oriented
Web Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
■ CHAPTER 4 Design Patterns for Building Service-Oriented
WebServices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
■ CHAPTER 5 Web Services Enhancements 3.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
■ CHAPTER 6 Secure Web Services with WS-Security . . . . . . . . . . . . . . . . . . . . . . . 107
■ CHAPTER 7 Extended Web Services Security with WS-Security
and WS-Secure Conversation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
■ CHAPTER 8 SOAP Messages:Addressing,Messaging,and Routing . . . . . . . . . 169
■ CHAPTER 9 Beyond WSE 3.0:Looking Ahead to Windows Communication
Foundation (WCF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
■ APPENDIX References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225
■ INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
iii
701xFM.qxd 7/14/06 5:43 PM Page iv
701xFM.qxd 7/14/06 5:43 PM Page v
Contents
About the Authors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
About the Technical Reviewers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
■ CHAPTER 1 Introducing Service-Oriented Architecture . . . . . . . . . . . . . . . . 1
Overview of Service-Oriented Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . 1
What Are Web Services,Really? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Components of Web Service Architecture . . . . . . . . . . . . . . . . . . . . . . 6
WS-I Basic Profile,WS- Specifications,and Web Services
Enhancements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Introducing the WS-I Basic Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Introducing the WS- Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Introducing Web Services Enhancements . . . . . . . . . . . . . . . . . . . . . 13
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
■ CHAPTER 2 The Web Services Description Language . . . . . . . . . . . . . . . . . 15
Elements of the WSDL Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
The <types> Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
The <message> Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
The <operation> Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
The <portType> Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
The <binding> Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
The <port> Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
The <service> Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
The WSDL 1.1 Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Working with WSDL Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
How to Generate a WSDL Document . . . . . . . . . . . . . . . . . . . . . . . . . . 27
What to Do with the WSDL Document . . . . . . . . . . . . . . . . . . . . . . . . . 28
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
v
701xFM.qxd 7/14/06 5:43 PM Page vi
vi ■ CONTENTS
■ CHAPTER 3 Design Patterns for Building Message-Oriented
Web Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
How to Build a Message-Oriented Web Service . . . . . . . . . . . . . . . . . . . . . 31
Step 1:Design the Messages and the Data Types . . . . . . . . . . . . . . 31
Step 2:Build the XSD Schema File for the Data Types . . . . . . . . . . . 32
Step 3:Create a Class File of Interface Definitions for the
Messages and Data Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Optional Step 3A:Generate the WSDL Document Manually . . . . . . 32
Step 4:Implement the Interface in the Web Service
Code-Behind File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Step 5:Generate a Proxy Class File for Clients Based on the
WSDL Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Step 6:Implement a Web Service Client Using a Proxy
Class File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Next Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Design and Build a Message-Oriented Web Service . . . . . . . . . . . . . . . . . 34
The Role of XML Messages and XSD Schemas . . . . . . . . . . . . . . . . . 34
The Role of the Interface Definition Class File . . . . . . . . . . . . . . . . . . 40
Messages vs.Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Consume the Web Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Build the Web Service Consumer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
■ CHAPTER 4 Design Patterns for Building Service-Oriented
Web Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
How to Build Service-Oriented Web Services . . . . . . . . . . . . . . . . . . . . . . . 57
Step 1:Create a Dedicated Type Definition Assembly . . . . . . . . . . . 61
Step 2:Create a Dedicated Business Assembly . . . . . . . . . . . . . . . . 61
Step 3:Create the Web Service Based on the Type Definition
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Step 4:Implement the Business Interface in the Web Service . . . . 62
Step 5:Generate a Web Service Proxy Class File Based on the
WSDL Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Step 6:Create a Web Service Client . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Design and Build a Service-Oriented Web Service . . . . . . . . . . . . . . . . . . . 63
Create the Definition Assembly (Step 1) . . . . . . . . . . . . . . . . . . . . . . . 64
Create the Business Assembly (Step 2) . . . . . . . . . . . . . . . . . . . . . . . 66
Create the Web Service (Steps 3–5) . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Create the Web Service Client (Step 6) . . . . . . . . . . . . . . . . . . . . . . . . 70
701xFM.qxd 7/14/06 5:43 PM Page vii
■ CONTENTS vii
Design and Build a Service Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Implement the StockTrader SOA Application Using a
Service Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
The External Web Service (StockQuoteExternalService) . . . . . . . . . 78
The Service Agent (StockTraderServiceAgent) . . . . . . . . . . . . . . . . . 78
The Business Assembly (StockTraderBusiness) . . . . . . . . . . . . . . . . 80
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
■ CHAPTER 5 Web Services Enhancements 3.0 . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Overview of the WS- Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Business Significance of the WS- Specifications . . . . . . . . . . . . . . . 84
Introducing the WS- Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Interoperability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Composability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Description and Discovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Messaging and Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Transactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
The WS- Specifications Covered in This Book . . . . . . . . . . . . . . . . . . . . . . . 87
Introducing Web Services Enhancements 3.0 . . . . . . . . . . . . . . . . . . . . . . . 89
How the WSE Processing Infrastructure Works . . . . . . . . . . . . . . . . . 89
How WSE Works with ASP.NET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Install and Configure WSE 3.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
X.509 Certificate Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
X.509 Certificates Explained . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Installing the X.509 Test Certificates . . . . . . . . . . . . . . . . . . . . . . . . . 101
Set ASP.NET Permissions to Use the X.509 Certificates . . . . . . . . . 103
Final Thoughts on WSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
■ CHAPTER 6 Secure Web Services with WS-Security . . . . . . . . . . . . . . . . . 107
The WS-Security Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Secure Web Services in an SOA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Implement WS-Security Using the WSE 3.0 Toolkit . . . . . . . . . . . . . . . . . 112
WSE 3.0 Security Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Turnkey Security Assertions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Securing the StockTrader Application Using WSE 3.0 . . . . . . . . . . 118
Authorization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
701xFM.qxd 7/14/06 5:43 PM Page viii
viii ■ CONTENTS
■ CHAPTER 7 Extended Web Services Security with WS-Security
and WS-Secure Conversation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Authentication Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Direct Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Brokered Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Implementing Brokered Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Brokered Authentication Using Mutual Certificates . . . . . . . . . . . . 137
Brokered Authentication Using Kerberos . . . . . . . . . . . . . . . . . . . . . 146
Prevent Replay Attacks Using Time Stamps,Digital Signatures,and
Message Correlation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Use Time Stamps for Message Verification . . . . . . . . . . . . . . . . . . . 159
Use Username Token Nonce Values for Message Verification . . . . 160
Use Message Correlation and Sequence Numbers for
Message Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Establish Trusted Communication with WS-Secure Conversation . . . . . 162
Overview of Secure Conversation . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
How to Implement Secure Conversation Using WSE 3.0 . . . . . . . . 166
Final Thoughts on Secure Conversation . . . . . . . . . . . . . . . . . . . . . . 166
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
■ CHAPTER 8 SOAP Messages: Addressing,Messaging,
and Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
Communication Models for Web Services . . . . . . . . . . . . . . . . . . . . . . . . . 170
Overview of WS-Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Overview of the WS-Addressing Constructs . . . . . . . . . . . . . . . . . . 173
WSE 3.0 Implementation for WS-Addressing . . . . . . . . . . . . . . . . . . 175
Security Considerations for WS-Addressing . . . . . . . . . . . . . . . . . . 177
Overview of Messaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Comparing Messaging with the HTTP and TCP Protocols . . . . . . . 178
Representing SOAP Messages in the WSE 3.0 Messaging
Framework . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
SOAP Senders and SOAP Receivers . . . . . . . . . . . . . . . . . . . . . . . . . 181
Traditional XML Web Services vs.SOAP Messaging
over HTTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Properties of Message-Enabled Web Services . . . . . . . . . . . . . . . . 188
701xFM.qxd 7/14/06 5:43 PM Page ix
■ CONTENTS ix
Overview of Routing and Referral . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Build a SOAP Router for the Load Balancing Routing Model . . . . . 190
Overview of the SOAPSender . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Overview of the SOAPService . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Overview of the SOAPRouter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Send a Stock Quote Request Using the SOAPSender . . . . . . . . . . . 195
Routing vs.WS-Referral . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Routing and Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Routing vs.WS-Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Integrate Web Services and MSMQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Use MSMQ for Reliable Messaging . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Create a Message Queue Trigger . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
Create a Web Service That Uses MSMQ . . . . . . . . . . . . . . . . . . . . . . 199
Implement the Web Service Client . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
■ CHAPTER 9 Beyond WSE 3.0: Looking Ahead to Windows
Communication Foundation (WCF) . . . . . . . . . . . . . . . . . . . . . . . 205
Overview of WCF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
The WCF Service Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
The WCF Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Hosting Environments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Messaging Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
System Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
Understanding WCF Web Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
What Is a WCF Web Service? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
Understanding WCF Applications and Infrastructure . . . . . . . . . . . . . . . . 214
The WCF Service Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Typed Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Service Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Transports and Formatters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
How to Get Ready for WCF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
WSE 3.0 and WCF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223