1. WCF (Indigo): Under the Hood of the Channel Layer
9/18/2018 4:37 AM
WCF (Indigo): Under the Hood of the Channel Layer
Steve Swartz
COM416
Architect
Microsoft Corporation
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

2. From the Outside Client Service Message Address Binding Contract A B C
9/18/2018 4:37 AM
From the Outside
Client
Service A B C Bv Bv Bv A B C
Message A B C Bv
Address
Binding
Contract
(Where)
(How)
(What)
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

3. From the Inside Service A B C Bv A B C Bv 9/18/2018 4:37 AM
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

4. Positioning This Talk This Talk Other Talks
9/18/2018 4:37 AM
Positioning This Talk
This Talk
How Does the Channel Layer Work?
Why Do You Care?
Other Talks
How Does the ServiceModel Work?
COM417: Thursday, 10:00am
How Do You Build XML Messaging Apps?
COM326: Thursday, 5:15pm
How Do You Build Channels?
COM424: Thursday, 3:45pm
How Do You Hook Channels Into WebHost?
COM413: Friday, 1:00pm
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

5. Big Ideas Bindings: How You Use The Channel Layer
9/18/2018 4:37 AM
Big Ideas
Bindings: How You Use The Channel Layer
Bindings Are Easy & Extensible
Channels: How Messages Are Exchanged
Channels have Shape, Capabilities, Stacks
Factories: How Channels Are Created
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

6. The Talk-In-A-Slide Binding Binding Factory CreateChannel<T>()
9/18/2018 4:37 AM
The Talk-In-A-Slide
Binding
Binding
Factory
CreateChannel<T>()
Channel
Factory
Listener
Listener
Channel
Factory
Listener
Channel
Factory
Listener
AcceptChannel()
Channel
Channel
Send()
Message
Receive()
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

7. Agenda: Message Binding Binding Factory CreateChannel<T>()
Listener
Listener
Channel
Factory
Listener
Channel
Factory
Listener
AcceptChannel()
Channel
Channel
Send()
Message
Receive()
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

8. Message: The Basics CLR Representation of SOAP Infoset
9/18/2018 4:37 AM
Message: The Basics
CLR Representation of SOAP Infoset
Supports SOAP 1.1 / SOAP 1.2
Encoding-Agnostic
Stream-Oriented
public abstract class Message : IDisposable {
public abstract MessageHeaders Headers { get; }
public abstract MessageProperties Properties { get; }
public abstract MessageVersion Version { get; }
public T GetBody<T>() { }
static public Message CreateMessage(...) { }
public void WriteMessage(XmlWriter writer) { } }
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

9. Message: Constructors
9/18/2018 4:37 AM
Message: Constructors
Select Action
Select Message Version
Select Formatter
Body as Object, XMLReader
Special Support for Faults, Replies
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

10. Agenda: Bindings Binding Binding Factory CreateChannel<T>()
9/18/2018 4:37 AM
Agenda: Bindings
Binding
Binding
Factory
CreateChannel<T>()
Channel
Factory
Listener
Listener
Channel
Factory
Listener
Channel
Factory
Listener
AcceptChannel()
Channel
Channel
Send()
Message
Receive()
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

11. Bindings: What Are They?
9/18/2018 4:37 AM
Bindings: What Are They?
Client
Service A B C C B A
Message A B C
Address
Binding
Contract
(Where)
(How)
(What)
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

12. Bindings: Out of the Box
9/18/2018 4:37 AM
Bindings: Out of the Box
Protocols
Security
Session
Transactions
Duplex
Streaming
BasicHttpBinding
BP 1.1 T
WsHttpBinding WS
T | S X
WsDualHttpBinding
NetTcpBinding
.NET O
NetNamedPipesBinding
NetProfileMsmqBinding
T = Transport Security | S = WS-Security | O = One-Way Only
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

13. Bindings: Scenarios Shipping Channels Future Channels Custom Channels
9/18/2018 4:37 AM
Bindings: Scenarios
Shipping Channels
Change defaults
Change options
Change set of channels used
Future Channels
Change versions, functionality
Preserve app code
Custom Channels
Binding benefits for any channel
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

14. 9/18/2018 4:37 AM
Binding: Object Model
public abstract class Binding : IDefaultCommunicationTimeouts {
protected Binding() { }
public abstract string Scheme { get; set{} }
public TimeSpan OpenTimeout { get; set{} }
public TimeSpan SendTimeout { get; set{} }
public TimeSpan ReceiveTimeout { get; set{} }
public TimeSpan CloseTimeout { get; set{} }
public virtual IChannelFactory<TChannel>
BuildChannelFactory<TChannel>(BindingParameterCollection p) {}
public virtual IChannelListener<TChannel>
BuildChannelListener<TChannel>(BindingParameterCollection p) {} }
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

15. Bindings: Build Your Own
9/18/2018 4:37 AM
Bindings: Build Your Own
Subclass Binding
An (Internal) Binding Element Collection
Completely Defines Binding, Channel Stack
A Constructor
Loads and Initializes B.E. Collection
A Public API
Simplifies Working With B.E. Collection
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

16. Binding: Binding Elements
9/18/2018 4:37 AM
Binding: Binding Elements
public abstract class BindingElement {
protected BindingElement() { }
public virtual IChannelFactory<TChannel>
BuildChannelFactory<TChannel>(ChannelBuildContext context) {}
public virtual IChannelListener<TChannel>
BuildChannelListener<TChannel>(ChannelBuildContext context) {} }
public class ChannelBuildContext
public ChannelBuildContext() {}
public BindingElementCollection UnhandledBindingElements { get; }
public BindingParameterCollection BindingParameters { get; }
public IChannelFactory<TChan> BuildInnerChannelFactory<TChan>() {}
public IChannelListener<TChan> BuildInnerChannelListener<TChan>(){}
BindingElement RemoveNextElement(){}
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

17. Bindings: Building Factories
9/18/2018 4:37 AM
Bindings: Building Factories
Call “Build()” on First Binding Element
It Builds Its Factory
It Optionally Consumes Binding Elements
It Optionally Consumes Binding Parameters
It Calls “BuildInner()” on BuildContext
It Wires Inner Factory to Itself
It Returns
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

18. Agenda: Factories Binding Binding Factory CreateChannel<T>()
9/18/2018 4:37 AM
Agenda: Factories
Binding
Binding
Factory
CreateChannel<T>()
Channel
Factory
Listener
Listener
Channel
Factory
Listener
Channel
Factory
Listener
AcceptChannel()
Channel
Channel
Send()
Message
Receive()
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

19. Factories: In Perspective
9/18/2018 4:37 AM
Factories: In Perspective
Apps use Channels
Factories Create Channels
Factories Share Resources
Per Process
Per Machine
Channel
Factory
Process
Manager
Machine Manager
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

20. ICommunicationObject
9/18/2018 4:37 AM
ICommunicationObject
Implemented by all channels, factories
public interface ICommunicationObject : IDisposable {
// Created, Opening, Opened, Closing, Closed, Faulted
CommunicationState State { get; }
event EventHandler Closed;
event EventHandler Closing;
event EventHandler Faulted;
event EventHandler Opened;
event EventHandler Opening;
// Async Calls Available, Too
void Open();
void Close();
void Abort(); }
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

21. IChannelManager Implemented by all channels, factories
9/18/2018 4:37 AM
IChannelManager
Implemented by all channels, factories
public interface IChannelManager : ICommunicationObject {
MessageVersion MessageVersion { get; }
string Scheme { get; }
ReadOnlyCollection<IChannel> GetChannels();
T GetProperty<T>() where T : class; }
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

22. Factories: The Client Clients Initiate Connections
9/18/2018 4:37 AM
Factories: The Client
Clients Initiate Connections
One contract, one binding, many addresses
Async methods available
public interface IChannelFactory<TChannel> : IChannelFactory {
TChannel CreateChannel(string address);
TChannel CreateChannel(Uri address);
TChannel CreateChannel(EndpointAddress to); }
public interface IChannelFactory : IChannelManager { }
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

23. Factories: The Service
9/18/2018 4:37 AM
Factories: The Service
Services Passively Wait For Connectinons
One address, one binding, many contracts
Async methods available
public interface IChannelListener<TChannel> : IChannelListener {
void SetUri( /* … */ );
bool WaitForChannel(TimeSpan timeout);
TChannel AcceptChannel();
TChannel AcceptChannel(TimeSpan timeout); }
public interface IChannelListener : IChannelManager { }
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

24. Agenda: Channels Binding Binding Factory CreateChannel<T>()
9/18/2018 4:37 AM
Agenda: Channels
Binding
Binding
Factory
CreateChannel<T>()
Channel
Factory
Listener
Listener
Channel
Factory
Listener
Channel
Factory
Listener
AcceptChannel()
Channel
Channel
Send()
Message
Receive()
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

25. Channels: Three Shapes
9/18/2018 4:37 AM
Channels: Three Shapes
public interface IOutputChannel : IChannel {
void Send(Message message); }
public interface IInputChannel : IChannel {
Message Receive();
public interface IDuplexChannel : IInputChannel, IOutputChannel { }
public interface IRequestChannel : IChannel {
Message Request(Message message);
public interface IReplyChannel : IChannel {
IRequestContext ReceiveRequest();
public interface IRequestContext : IDisposable {
Message RequestMessage { get; }
void Reply(Message message);
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

26. Channels: Sessions public interface ISession { string Id { get; } }
9/18/2018 4:37 AM
Channels: Sessions
public interface ISession {
string Id { get; } }
public interface ISessionChannel<SessionType> where SessionType : ISession
SessionType Session { get; }
public interface IInputSession : ISession
public interface IInputSessionChannel : IInputChannel, ISessionChannel<IInputSession>
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

27. Channel Families: Transports
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

28. Channel Families: Encoders
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

29. Channel Families: Dual
Dual Channel
Channel
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

30. Channel Families: Protocols
Protocol Channel EP EP
Protocol Channel
Transport Channel
Transport Channel M M M
Message M
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

31. In Summary Bindings: How You Use The Channel Layer
9/18/2018 4:37 AM
In Summary
Bindings: How You Use The Channel Layer
Bindings Are Easy & Also Extensible
Channels: How Messages Are Exchanged
Channels have Shape, Capabilities, Stacks
Factories: How Channels Are Created
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

32. Community Resources At PDC After PDC For more information, go see
9/18/2018 4:37 AM
Community Resources
At PDC
For more information, go see
Service Model Internals: COM417, Thursday, 10:00am
XML Messaging: COM326, Thursday, 5:15pm
Building Channels: COM424, Thursday, 3:45pm
WebHost Integration: COM413, Friday, 1:00pm
Ask The Experts table: WCF Internals
I’ll be at COM Track lounge: Thu 3:30-6:30pm, Fri 8:30-11am
After PDC
If you miss some of these sessions, watch the DVD!
MSDN dev center
The WCF newsgroup
Channel 9 tag
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

33. © 2005 Microsoft Corporation. All rights reserved.
9/18/2018 4:37 AM
© 2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.
©2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.