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WCF 4.0

Eyal Vardi, profile picture
Eyal Vardi

The document discusses various topics related to simplifying configuration in WCF 4.0 including: - Simplified configuration using default endpoints and bindings - Protocol mapping to associate schemes like HTTP with specific bindings - File-less activation without .svc files by defining virtual service endpoints - Discovery endpoints and announcements to enable services to broadcast their presence - Using a discovery proxy so clients can find services registered with the proxy.

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WCF 4.0 Eyal Vardi CEO E4D Solutions LTD Microsoft MVP Visual C# blog: www.eVardi.com
Agenda Simplified Configuration Serialization Improvements Discovery Routing Services Web Http Programming
Simplified Configuration
Simplified Configuration using ( var host = new ServiceHost ( typeof ( CalculatorService ) , new Uri ( &quot;http://localhost:1234/Service&quot; ) , new Uri ( &quot;net.tcp://localhost:4321/Service&quot; ) ) ) { host.Open(); Console .WriteLine( &quot;The service is ready.&quot; ); Console .WriteLine( &quot;Press <ENTER> to terminate service.&quot; ); Console .ReadKey(); host.Close(); } The service is open with default binding & behaviors
Explicitly & Default Endpoints using ( var host = new ServiceHost ( typeof ( CalculatorService ) ) ) { host.AddDefaultEndpoints(); host.Open(); } < services > < service name = &quot; CalculatorService &quot; > < host > < baseAddresses > < add baseAddress = &quot; http://localhost:1234/Service &quot; /> < add baseAddress = &quot; net.tcp://localhost:4321/Service &quot; /> </ baseAddresses > </ host > </ service > </ services > Config File Default Endpoint
Default Endpoint In WEB
Default Profile < bindings >    < basicHttpBinding >      < binding maxReceivedMessageSize = &quot; 9999999 &quot; >          < readerQuotas maxArrayLength = &quot; 9999999 &quot; />       </ binding >    </ basicHttpBinding >      </ bindings > < services > < service name = &quot; CalculatorService &quot; > < host > < baseAddresses > < add baseAddress = &quot; http://localhost:1234/Service &quot; /> < add baseAddress = &quot; net.tcp://localhost:4321/Service &quot; /> </ baseAddresses > </ host > </ service > </ services > No Name !!! Default profile for BasicHttpBinding
Protocol Mapping < protocolMapping >   < add scheme = &quot; http &quot; binding = &quot; basicHttpBinding &quot; />   < add scheme = &quot; net.tcp &quot; binding = &quot; netTcpBinding &quot; />   < add scheme = &quot; net.pipe &quot; binding = &quot; netNamedPipeBinding &quot; />   < add scheme = &quot; net.msmq &quot; binding = &quot; netMsmqBinding &quot; /> </ protocolMapping > < services > < service name = &quot; CalculatorService &quot; > < host > < baseAddresses > < add baseAddress = &quot; http://localhost:1234/Service &quot; /> < add baseAddress = &quot; net.tcp://localhost:4321/Service &quot; /> </ baseAddresses > </ host > </ service > </ services >
Protocol Mapping < protocolMapping >   < add scheme = &quot; http &quot; binding = &quot; wsHttpBinding &quot; bindingConfiguration = &quot; wsHttpBinding &quot; /> </ protocolMapping > < services > < service name = &quot; CalculatorService &quot; > < host > < baseAddresses > < add baseAddress = &quot; http://localhost:1234/Service &quot; /> < add baseAddress = &quot; net.tcp://localhost:4321/Service &quot; /> </ baseAddresses > </ host > </ service > </ services >
Simplified Configuration
File-less Activation (no .svc) It possible to define virtual service activation endpoints that map to your WCF service. ServiceHostingEnvironment is an application level config. Supports activation over both http and non-http protocol. Requires extensions in the relatativeAddress i.e. .svc. < serviceHostingEnvironment >       < serviceActivations >         < add relativeAddress =&quot;~/E4D.svc&quot; service =&quot;E4d.Hello&quot;/>       </ serviceActivations >     </ serviceHostingEnvironment >
File-less Activation
Kind Attribute Set the type of the standard endpoint Type of kinds: mexEndpoint discoveryEndpoint announcementEndpoint udpDiscoveryEndpoint udpAnnouncementEndpoint webHttpEndpoint < service name =&quot;HelloService&quot;>      ...      < endpoint binding =&quot;webHttpBinding&quot; contract = &quot;IService1&quot; kind = &quot;webHttpEndpoint&quot; /> < endpoint kind =&quot;mexEndpoint&quot; /> </ service > No need in bindingConfiguration endpointConfiguration
Standard Endpoint Setting < service name =&quot;HelloService&quot;>      < endpoint kind =&quot;udpDiscoveryEndpoint&quot; endpointConfiguration =&quot;MyEndpointSettings&quot; /> </ service > < standardEndpoints >    < udpDiscoveryEndpoint >        < standardEndpoint name =&quot;MyEndpointSettings&quot;              multicastAddress =&quot;soap.udp://239.255.255.252:3704&quot;              maxResponseDelay =&quot;00:00:02&quot;>             < transportSettings                   duplicateMessageHistoryLength =&quot;2048&quot;                   maxPendingMessageCount =&quot;5&quot;                   maxReceivedMessageSize =&quot;8192&quot;                   maxBufferPoolSize =&quot;262144&quot;/>            </ standardEndpoint >     </ udpDiscoveryEndpoint > </ standardEndpoints >
Custom Standard Endpoint Standard endpoint must be registered in the <endpointExtensions> section. < system.serviceModel > < service name =&quot;HelloService&quot;>      < endpoint kind = &quot; udpDiscoveryEndpoint &quot; /> </ service >   < extensions >       < endpointExtensions >         < add name = &quot; udpDiscoveryEndpoint &quot;   type = &quot; ... &quot; />       </ endpointExtensions >    </ extensions > </ system.serviceModel >
Standard Endpoint
Service Discovery
Why We Need Discovery?
Async WCF Services
WS – Discovery Service Opened Client Target Service Client Client Target Service Target Service Hello
WS – Discovery Client Look for Service Client Target Service Client Client Target Service Target Service Probe
WS – Discovery Service Return Match Message Client Target Service Client Client Target Service Target Service Probe Match
WS – Discovery Service Closed Client Target Service Client Client Target Service Target Service By
Multicast, Broadcast & Unicast Multicast Broadcast Unicast
WCF With Discovery Server Side Normal endpoints with EndpointDiscoveryBehavior Discovery endpoint with ServiceDiscoveryBehavior Target Service
WCF With Discovery Server Side < system.serviceModel > < service name =&quot;HelloService&quot;> < endpoint address = &quot;net.tcp://localhost/&quot; binding = &quot;netTcpBinding&quot; contract = &quot;ICalculator&quot; />      < endpoint kind = &quot; udpDiscoveryEndpoint &quot; /> </ service >   </ behaviors > < serviceBehaviors > < behavior > < serviceDiscovery /> </ behavior > </ serviceBehaviors > </ behaviors > </ system.serviceModel >
Create discovery client Define the search Criteria for the client Choose endpoint, from the search result. WCF With Discovery Client Side ( Two steps ) var client = new DiscoveryClient ( new UdpDiscoveryEndpoint () ); var criteria = new FindCriteria ( typeof ( ICalculatorService ) ); FindResponse findResponse = client.Find( criteria ); var address = findResponse.Endpoints[0].Address Binding? ListenUri? Scope?
Basic Discovery
How to Know About The Binding? Add MEX endpoint Discovery the MEX endpoint Use the MetadataResolver to resolve the binding. ServiceEndpointCollection endpoints = MetadataResolver .Resolve( typeof ( IHelloService ), mexAddress );
Dynamic Endpoint DiscoveryClientBindingElement is added to the binding you specify in the DynamicEndpoint constructor, if not already present. var dynamicEndpoint = new DynamicEndpoint ( ContractDescription .GetContract( typeof ( ICalc ) ), new NetTcpBinding () ); dynamicEndpoint.FindCriteria.Scopes.Add(...); var client = new CalcClient ( dynamicEndpoint );
Dynamic Endpoint
Discovery Announcements < service name =&quot;HelloService&quot;>      ...      < endpoint name =&quot;udpDiscovery“ kind =&quot;udpDiscoveryEndpoint&quot;/> </ service > ... < serviceBehaviors >    < behavior >       < serviceDiscovery >          < announcementEndpoints >             < endpoint name = &quot; udpAnnouncement &quot; kind = &quot; udpAnnouncementEndpoint &quot; />             </ announcementEndpoints >          </ serviceDiscovery >    </ behavior > </ serviceBehaviors >  Server Side:
Discovery Announcements var announcementService = new AnnouncementService (); announcementService.OnlineAnnouncementReceived += OnOnlineEvent; announcementService.OfflineAnnouncementReceived += OnOfflineEvent; using ( var host = new ServiceHost ( announcementService ) ) { host.AddServiceEndpoint( new UdpAnnouncementEndpoint () ); host.Open(); ... } Consumers Side:
Discovery Announcements
Announcement Data
Discovery Proxy Managed discovery allows you to locate services no matter where they are, as long as they are registered with a discovery proxy. Client Target Service Client Client Target Service Target Service Discovery Proxy Hello
Discovery Proxy Managed discovery allows you to locate services no matter where they are, as long as they are registered with a discovery proxy. Client Target Service Client Client Target Service Target Service Discovery Proxy Probe
Discovery Proxy Managed discovery allows you to locate services no matter where they are, as long as they are registered with a discovery proxy. Client Target Service Client Client Target Service Target Service Discovery Proxy Probe Match
Discovery Proxy Managed discovery allows you to locate services no matter where they are, as long as they are registered with a discovery proxy. Client Target Service Client Client Target Service Target Service Discovery Proxy By
Discovery Proxy
Service Discovery When service is open he send to MDC a message ( Endpoint info). When Service look for a service he ask the MDC. Unified Cache View
Solution Advantage No need to do multicast communication The server endpoints info is available to all the services immediate after the server is open, ( no need to do communication ). When the service is unavailable (down time) the endpoint info will still be available
Routing Services
Why a Router Service? Load balancing Priority routing to application pools or servers according to message content. Partitioning services so that messages targeting operations can be handled by different application pools or servers.
Router Service Architecture Server C Server C Server B Client Router Service Filter Tables Filters Service A Service B Service C
Router Endpoints & Contracts < service name = &quot; System.ServiceModel.Routing.RoutingService &quot; >    < endpoint name = &quot;reqReplyEndpoint &quot; address = &quot;&quot; binding = &quot; basicHttpBinding &quot; contract = &quot; System.ServiceModel.Routing.IRequestReplyRouter &quot; /> </ service >
Configuring Filters The RouterService evaluates filters to determine how to forward the message. < serviceBehaviors > < behavior > < routing filterTableName = &quot; MyRoutingTable &quot; /> </ behavior > </ serviceBehaviors > < routing > < filters > < filter name =&quot;MatchAllFilter1&quot; filterType =&quot;MatchAll&quot; /> </ filters > < filterTables > < filterTable name =&quot;MyroutingTable&quot;> < add filterName =&quot;MatchAllFilter1&quot; endpointName =&quot;CalculatorService&quot; /> </ filterTable > </ filterTables > </ routing > < client > < endpoint name =&quot;CalculatorService&quot; address =&quot;http://...&quot; binding =&quot;basicHtttpBinding&quot; contract =&quot;*&quot; > </ client >
Message Filter Compares the &quot;To&quot; & Headers address to the endpoint address Compares the incoming &quot;Action&quot; value against the actions on the contract
Message Filter Compares the &quot;To&quot; & Headers address to the endpoint address Compares the incoming &quot;Action&quot; value against the actions on the contract < filters > < filter name =&quot;addFilter&quot; filterType =&quot;XPath&quot;   filterData =&quot;...&quot; > < filter name =&quot;addFilter&quot; filterType =&quot;Action&quot;  filterData =&quot;...&quot; > </ filters >
Filtering architecture
Binding Configuration The router typically does not process protocol headers passed by the client. Security Reliable sessions Transactions Other related protocols.
Routing Services
Error Handing You can define different lists of alternate endpoints that will be used if communicating with the initial target endpoint results in an error. < routing > ... < filterTable name =&quot;MyroutingTable&quot;> < add filterName =&quot;f1&quot; endpointName =&quot;t1&quot; backupList =&quot;altEndpoints&quot; /> </ filterTable > ... < backupLists >         < backupList name =&quot;altEndpoints&quot;>             < add endpointName =&quot;CalculatorService2&quot;/>                   </ backupList >       </ backupLists > </ routing >
Multicast Routing Behavior Supports automatically routing a particular incoming message to multiple destinations in a “multicast” fashion. < routing > < filters > < filter name =&quot;Filter1&quot; filterType =&quot;MatchAll&quot; /> </ filters > < filterTables > < filterTable name =&quot;MyroutingTable&quot;> < add filterName =&quot;Filter1&quot; endpointName =&quot;Target1&quot; /> < add filterName =&quot;Filter1&quot; endpointName =&quot;Target2&quot; /> < add filterName =&quot;Filter1&quot; endpointName =&quot;Target3&quot; /> </ filterTable > </ filterTables > </ routing > “ Multicast”
Higher Default Throttling Settings MaxConcurrent Sessions 10  100 * CPU MaxConcurrent Calls 16  16 * CPU MaxConcurrent Instances 26  116 * CPU
Serialization Improvements
Serialization Improvements public UserInfo EchoUser ( int userId ); Encoding Deserialization Serialization Encoding Binding Transport
KnownType Attribute Make sure a type is included in the serialization stream [ ServieContract ] public intrface IMedia { [ OperationContract ] Media GetMedia( Media media ); } [ DataContract ] public class Media { ... } [ DataContract ] public class DVD : Media { ... } [ DataContract ] public class CD : Media { ... } < Envelope > < Header > < Action >E4D/IMedia/GetMedia</ Action > </ Header > < Body > < GetMedia > < media > < Name>Madona </ Name > < Type>CDWR </ Type > </ media > </ GetMedia > </ Body > </ Envelope >
[ ServieContract ] public intrface IMedia { [ OperationContract ] Media GetMedia( Media media ); } [ DataContract ] public class Media { ... } [ DataContract ] public class DVD : Media { ... } [ DataContract ] public class CD : Media { ... } < Envelope > < Header > < Action >E4D/IMedia/GetMedia</ Action > </ Header > < Body > < GetMedia > < media type =&quot;CD&quot;> < Name>Madona </ Name > < Type>CDWR </ Type > </ media > </ GetMedia > </ Body > </ Envelope >
KnownType Attribute Make sure a type is included in the serialization stream [ ServieContract ] public intrface IMedia { [ OperationContract ] Media GetMedia( Media media ); } [ DataContract ] [ KnownType ( typeof ( DVD ) )] [ KnownType ( typeof ( CD ) ) ] public class Media { ... } [ DataContract ] public class DVD : Media { ... } [ DataContract ] public class CD : Media { ... } < Envelope > < Header > < Action >E4D/IMedia/GetMedia</ Action > </ Header > < Body > < GetMedia > < media type =&quot;CD&quot;> < Name>Madona </ Name > < Type>CDWR </ Type > </ media > </ GetMedia > </ Body > </ Envelope > Known Type
The Serialization in WCF 3.5
The Serialization in WCF 4.0
Data Contract Resolver New types can be added at runtime using the xsi:type schema declarations. The ResolveType method is invoked only during serialization and is used to map any type to a new xsi:type name. The ResolveName method is used only during deserialization and allows you to map any xsi:type information to a type.
Data Contract Resolver
Web Http Programming
Enhanced REST Support Caching support in IIS/WAS Dynamic content types Improved exception support JSONP support for AJAX Services Automatically generated help page ASP.NET Routing integration Helper methods for creating content
Help Page < behaviors > < endpointBehaviors > < behavior name = &quot; HelpBehavior &quot; > < webHttp enableHelp = &quot; true &quot; /> </ behavior > </ endpointBehaviors > </ behaviors >
Caching < system.web > < caching > < outputCacheSettings > < outputCacheProfiles > < add name = &quot; CacheFor60Seconds &quot; duration = &quot; 60 &quot; varyByParam = &quot; format &quot; /> </ outputCacheProfiles > </ outputCacheSettings > </ caching > </ system.web > [ AspNetCacheProfile (&quot; CacheFor60Seconds &quot;)] [ WebGet ] [ OperationContract ] public Counter GetItem(){...}
Help Page
JSONP For AJAX Services Convention used to invoke cross-domain scripts by generating script tags in the current document. Result is returned in a specified callback function <script src=&quot;http://...&quot;> can evaluate scripts from any domain. < serviceHostingEnvironment aspNetCompatibilityEnabled =&quot;true&quot;/> < standardEndpoints > < webScriptEndpoint > < standardEndpoint crossDomainScriptAccessEnabled =&quot;true&quot;/> </ webScriptEndpoint > </ standardEndpoints >
JSONP
Dynamic Content WCF can automatically create response format based on Content-Type and Accepts headers. Helper methods for creating content Available through WebOperationContext public Message CreateAtom10Response(...); public Message CreateJsonResponse<T>(...); public Message CreateStreamResponse(...); public Message CreateTextResponse(...); public Message CreateXmlResponse(...); public Message CreateXmlResponse<T>(...);
Dynamic Content
Resources http://blogs.microsoft.co.il/blogs/vardi/ A Developer’s Introduction to WCF 4 Beta 1 Service Configuration Improvements in .NET 4 What’s New in WCF 4.0? Jesus Rodriguez's WebLog

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WCF 4.0

  • 1. WCF 4.0 Eyal Vardi CEO E4D Solutions LTD Microsoft MVP Visual C# blog: www.eVardi.com
  • 2. Agenda Simplified Configuration Serialization Improvements Discovery Routing Services Web Http Programming
  • 4. Simplified Configuration using ( var host = new ServiceHost ( typeof ( CalculatorService ) , new Uri ( &quot;http://localhost:1234/Service&quot; ) , new Uri ( &quot;net.tcp://localhost:4321/Service&quot; ) ) ) { host.Open(); Console .WriteLine( &quot;The service is ready.&quot; ); Console .WriteLine( &quot;Press <ENTER> to terminate service.&quot; ); Console .ReadKey(); host.Close(); } The service is open with default binding & behaviors
  • 5. Explicitly & Default Endpoints using ( var host = new ServiceHost ( typeof ( CalculatorService ) ) ) { host.AddDefaultEndpoints(); host.Open(); } < services > < service name = &quot; CalculatorService &quot; > < host > < baseAddresses > < add baseAddress = &quot; http://localhost:1234/Service &quot; /> < add baseAddress = &quot; net.tcp://localhost:4321/Service &quot; /> </ baseAddresses > </ host > </ service > </ services > Config File Default Endpoint
  • 7. Default Profile < bindings >    < basicHttpBinding >      < binding maxReceivedMessageSize = &quot; 9999999 &quot; >          < readerQuotas maxArrayLength = &quot; 9999999 &quot; />       </ binding >    </ basicHttpBinding >      </ bindings > < services > < service name = &quot; CalculatorService &quot; > < host > < baseAddresses > < add baseAddress = &quot; http://localhost:1234/Service &quot; /> < add baseAddress = &quot; net.tcp://localhost:4321/Service &quot; /> </ baseAddresses > </ host > </ service > </ services > No Name !!! Default profile for BasicHttpBinding
  • 8. Protocol Mapping < protocolMapping >   < add scheme = &quot; http &quot; binding = &quot; basicHttpBinding &quot; />   < add scheme = &quot; net.tcp &quot; binding = &quot; netTcpBinding &quot; />   < add scheme = &quot; net.pipe &quot; binding = &quot; netNamedPipeBinding &quot; />   < add scheme = &quot; net.msmq &quot; binding = &quot; netMsmqBinding &quot; /> </ protocolMapping > < services > < service name = &quot; CalculatorService &quot; > < host > < baseAddresses > < add baseAddress = &quot; http://localhost:1234/Service &quot; /> < add baseAddress = &quot; net.tcp://localhost:4321/Service &quot; /> </ baseAddresses > </ host > </ service > </ services >
  • 9. Protocol Mapping < protocolMapping >   < add scheme = &quot; http &quot; binding = &quot; wsHttpBinding &quot; bindingConfiguration = &quot; wsHttpBinding &quot; /> </ protocolMapping > < services > < service name = &quot; CalculatorService &quot; > < host > < baseAddresses > < add baseAddress = &quot; http://localhost:1234/Service &quot; /> < add baseAddress = &quot; net.tcp://localhost:4321/Service &quot; /> </ baseAddresses > </ host > </ service > </ services >
  • 11. File-less Activation (no .svc) It possible to define virtual service activation endpoints that map to your WCF service. ServiceHostingEnvironment is an application level config. Supports activation over both http and non-http protocol. Requires extensions in the relatativeAddress i.e. .svc. < serviceHostingEnvironment >       < serviceActivations >         < add relativeAddress =&quot;~/E4D.svc&quot; service =&quot;E4d.Hello&quot;/>       </ serviceActivations >     </ serviceHostingEnvironment >
  • 13. Kind Attribute Set the type of the standard endpoint Type of kinds: mexEndpoint discoveryEndpoint announcementEndpoint udpDiscoveryEndpoint udpAnnouncementEndpoint webHttpEndpoint < service name =&quot;HelloService&quot;>      ...      < endpoint binding =&quot;webHttpBinding&quot; contract = &quot;IService1&quot; kind = &quot;webHttpEndpoint&quot; /> < endpoint kind =&quot;mexEndpoint&quot; /> </ service > No need in bindingConfiguration endpointConfiguration
  • 14. Standard Endpoint Setting < service name =&quot;HelloService&quot;>      < endpoint kind =&quot;udpDiscoveryEndpoint&quot; endpointConfiguration =&quot;MyEndpointSettings&quot; /> </ service > < standardEndpoints >    < udpDiscoveryEndpoint >        < standardEndpoint name =&quot;MyEndpointSettings&quot;              multicastAddress =&quot;soap.udp://239.255.255.252:3704&quot;              maxResponseDelay =&quot;00:00:02&quot;>             < transportSettings                   duplicateMessageHistoryLength =&quot;2048&quot;                   maxPendingMessageCount =&quot;5&quot;                   maxReceivedMessageSize =&quot;8192&quot;                   maxBufferPoolSize =&quot;262144&quot;/>            </ standardEndpoint >     </ udpDiscoveryEndpoint > </ standardEndpoints >
  • 15. Custom Standard Endpoint Standard endpoint must be registered in the <endpointExtensions> section. < system.serviceModel > < service name =&quot;HelloService&quot;>      < endpoint kind = &quot; udpDiscoveryEndpoint &quot; /> </ service >   < extensions >       < endpointExtensions >         < add name = &quot; udpDiscoveryEndpoint &quot;   type = &quot; ... &quot; />       </ endpointExtensions >    </ extensions > </ system.serviceModel >
  • 18. Why We Need Discovery?
  • 20. WS – Discovery Service Opened Client Target Service Client Client Target Service Target Service Hello
  • 21. WS – Discovery Client Look for Service Client Target Service Client Client Target Service Target Service Probe
  • 22. WS – Discovery Service Return Match Message Client Target Service Client Client Target Service Target Service Probe Match
  • 23. WS – Discovery Service Closed Client Target Service Client Client Target Service Target Service By
  • 24. Multicast, Broadcast & Unicast Multicast Broadcast Unicast
  • 25. WCF With Discovery Server Side Normal endpoints with EndpointDiscoveryBehavior Discovery endpoint with ServiceDiscoveryBehavior Target Service
  • 26. WCF With Discovery Server Side < system.serviceModel > < service name =&quot;HelloService&quot;> < endpoint address = &quot;net.tcp://localhost/&quot; binding = &quot;netTcpBinding&quot; contract = &quot;ICalculator&quot; />      < endpoint kind = &quot; udpDiscoveryEndpoint &quot; /> </ service >   </ behaviors > < serviceBehaviors > < behavior > < serviceDiscovery /> </ behavior > </ serviceBehaviors > </ behaviors > </ system.serviceModel >
  • 27. Create discovery client Define the search Criteria for the client Choose endpoint, from the search result. WCF With Discovery Client Side ( Two steps ) var client = new DiscoveryClient ( new UdpDiscoveryEndpoint () ); var criteria = new FindCriteria ( typeof ( ICalculatorService ) ); FindResponse findResponse = client.Find( criteria ); var address = findResponse.Endpoints[0].Address Binding? ListenUri? Scope?
  • 29. How to Know About The Binding? Add MEX endpoint Discovery the MEX endpoint Use the MetadataResolver to resolve the binding. ServiceEndpointCollection endpoints = MetadataResolver .Resolve( typeof ( IHelloService ), mexAddress );
  • 30. Dynamic Endpoint DiscoveryClientBindingElement is added to the binding you specify in the DynamicEndpoint constructor, if not already present. var dynamicEndpoint = new DynamicEndpoint ( ContractDescription .GetContract( typeof ( ICalc ) ), new NetTcpBinding () ); dynamicEndpoint.FindCriteria.Scopes.Add(...); var client = new CalcClient ( dynamicEndpoint );
  • 32. Discovery Announcements < service name =&quot;HelloService&quot;>      ...      < endpoint name =&quot;udpDiscovery“ kind =&quot;udpDiscoveryEndpoint&quot;/> </ service > ... < serviceBehaviors >    < behavior >       < serviceDiscovery >          < announcementEndpoints >             < endpoint name = &quot; udpAnnouncement &quot; kind = &quot; udpAnnouncementEndpoint &quot; />             </ announcementEndpoints >          </ serviceDiscovery >    </ behavior > </ serviceBehaviors >  Server Side:
  • 33. Discovery Announcements var announcementService = new AnnouncementService (); announcementService.OnlineAnnouncementReceived += OnOnlineEvent; announcementService.OfflineAnnouncementReceived += OnOfflineEvent; using ( var host = new ServiceHost ( announcementService ) ) { host.AddServiceEndpoint( new UdpAnnouncementEndpoint () ); host.Open(); ... } Consumers Side:
  • 36. Discovery Proxy Managed discovery allows you to locate services no matter where they are, as long as they are registered with a discovery proxy. Client Target Service Client Client Target Service Target Service Discovery Proxy Hello
  • 37. Discovery Proxy Managed discovery allows you to locate services no matter where they are, as long as they are registered with a discovery proxy. Client Target Service Client Client Target Service Target Service Discovery Proxy Probe
  • 38. Discovery Proxy Managed discovery allows you to locate services no matter where they are, as long as they are registered with a discovery proxy. Client Target Service Client Client Target Service Target Service Discovery Proxy Probe Match
  • 39. Discovery Proxy Managed discovery allows you to locate services no matter where they are, as long as they are registered with a discovery proxy. Client Target Service Client Client Target Service Target Service Discovery Proxy By
  • 41. Service Discovery When service is open he send to MDC a message ( Endpoint info). When Service look for a service he ask the MDC. Unified Cache View
  • 42. Solution Advantage No need to do multicast communication The server endpoints info is available to all the services immediate after the server is open, ( no need to do communication ). When the service is unavailable (down time) the endpoint info will still be available
  • 44. Why a Router Service? Load balancing Priority routing to application pools or servers according to message content. Partitioning services so that messages targeting operations can be handled by different application pools or servers.
  • 45. Router Service Architecture Server C Server C Server B Client Router Service Filter Tables Filters Service A Service B Service C
  • 46. Router Endpoints & Contracts < service name = &quot; System.ServiceModel.Routing.RoutingService &quot; >    < endpoint name = &quot;reqReplyEndpoint &quot; address = &quot;&quot; binding = &quot; basicHttpBinding &quot; contract = &quot; System.ServiceModel.Routing.IRequestReplyRouter &quot; /> </ service >
  • 47. Configuring Filters The RouterService evaluates filters to determine how to forward the message. < serviceBehaviors > < behavior > < routing filterTableName = &quot; MyRoutingTable &quot; /> </ behavior > </ serviceBehaviors > < routing > < filters > < filter name =&quot;MatchAllFilter1&quot; filterType =&quot;MatchAll&quot; /> </ filters > < filterTables > < filterTable name =&quot;MyroutingTable&quot;> < add filterName =&quot;MatchAllFilter1&quot; endpointName =&quot;CalculatorService&quot; /> </ filterTable > </ filterTables > </ routing > < client > < endpoint name =&quot;CalculatorService&quot; address =&quot;http://...&quot; binding =&quot;basicHtttpBinding&quot; contract =&quot;*&quot; > </ client >
  • 48. Message Filter Compares the &quot;To&quot; & Headers address to the endpoint address Compares the incoming &quot;Action&quot; value against the actions on the contract
  • 49. Message Filter Compares the &quot;To&quot; & Headers address to the endpoint address Compares the incoming &quot;Action&quot; value against the actions on the contract < filters > < filter name =&quot;addFilter&quot; filterType =&quot;XPath&quot;   filterData =&quot;...&quot; > < filter name =&quot;addFilter&quot; filterType =&quot;Action&quot;  filterData =&quot;...&quot; > </ filters >
  • 51. Binding Configuration The router typically does not process protocol headers passed by the client. Security Reliable sessions Transactions Other related protocols.
  • 53. Error Handing You can define different lists of alternate endpoints that will be used if communicating with the initial target endpoint results in an error. < routing > ... < filterTable name =&quot;MyroutingTable&quot;> < add filterName =&quot;f1&quot; endpointName =&quot;t1&quot; backupList =&quot;altEndpoints&quot; /> </ filterTable > ... < backupLists >         < backupList name =&quot;altEndpoints&quot;>             < add endpointName =&quot;CalculatorService2&quot;/>                   </ backupList >       </ backupLists > </ routing >
  • 54. Multicast Routing Behavior Supports automatically routing a particular incoming message to multiple destinations in a “multicast” fashion. < routing > < filters > < filter name =&quot;Filter1&quot; filterType =&quot;MatchAll&quot; /> </ filters > < filterTables > < filterTable name =&quot;MyroutingTable&quot;> < add filterName =&quot;Filter1&quot; endpointName =&quot;Target1&quot; /> < add filterName =&quot;Filter1&quot; endpointName =&quot;Target2&quot; /> < add filterName =&quot;Filter1&quot; endpointName =&quot;Target3&quot; /> </ filterTable > </ filterTables > </ routing > “ Multicast”
  • 55. Higher Default Throttling Settings MaxConcurrent Sessions 10  100 * CPU MaxConcurrent Calls 16  16 * CPU MaxConcurrent Instances 26  116 * CPU
  • 57. Serialization Improvements public UserInfo EchoUser ( int userId ); Encoding Deserialization Serialization Encoding Binding Transport
  • 58. KnownType Attribute Make sure a type is included in the serialization stream [ ServieContract ] public intrface IMedia { [ OperationContract ] Media GetMedia( Media media ); } [ DataContract ] public class Media { ... } [ DataContract ] public class DVD : Media { ... } [ DataContract ] public class CD : Media { ... } < Envelope > < Header > < Action >E4D/IMedia/GetMedia</ Action > </ Header > < Body > < GetMedia > < media > < Name>Madona </ Name > < Type>CDWR </ Type > </ media > </ GetMedia > </ Body > </ Envelope >
  • 59. [ ServieContract ] public intrface IMedia { [ OperationContract ] Media GetMedia( Media media ); } [ DataContract ] public class Media { ... } [ DataContract ] public class DVD : Media { ... } [ DataContract ] public class CD : Media { ... } < Envelope > < Header > < Action >E4D/IMedia/GetMedia</ Action > </ Header > < Body > < GetMedia > < media type =&quot;CD&quot;> < Name>Madona </ Name > < Type>CDWR </ Type > </ media > </ GetMedia > </ Body > </ Envelope >
  • 60. KnownType Attribute Make sure a type is included in the serialization stream [ ServieContract ] public intrface IMedia { [ OperationContract ] Media GetMedia( Media media ); } [ DataContract ] [ KnownType ( typeof ( DVD ) )] [ KnownType ( typeof ( CD ) ) ] public class Media { ... } [ DataContract ] public class DVD : Media { ... } [ DataContract ] public class CD : Media { ... } < Envelope > < Header > < Action >E4D/IMedia/GetMedia</ Action > </ Header > < Body > < GetMedia > < media type =&quot;CD&quot;> < Name>Madona </ Name > < Type>CDWR </ Type > </ media > </ GetMedia > </ Body > </ Envelope > Known Type
  • 63. Data Contract Resolver New types can be added at runtime using the xsi:type schema declarations. The ResolveType method is invoked only during serialization and is used to map any type to a new xsi:type name. The ResolveName method is used only during deserialization and allows you to map any xsi:type information to a type.
  • 66. Enhanced REST Support Caching support in IIS/WAS Dynamic content types Improved exception support JSONP support for AJAX Services Automatically generated help page ASP.NET Routing integration Helper methods for creating content
  • 67. Help Page < behaviors > < endpointBehaviors > < behavior name = &quot; HelpBehavior &quot; > < webHttp enableHelp = &quot; true &quot; /> </ behavior > </ endpointBehaviors > </ behaviors >
  • 68. Caching < system.web > < caching > < outputCacheSettings > < outputCacheProfiles > < add name = &quot; CacheFor60Seconds &quot; duration = &quot; 60 &quot; varyByParam = &quot; format &quot; /> </ outputCacheProfiles > </ outputCacheSettings > </ caching > </ system.web > [ AspNetCacheProfile (&quot; CacheFor60Seconds &quot;)] [ WebGet ] [ OperationContract ] public Counter GetItem(){...}
  • 70. JSONP For AJAX Services Convention used to invoke cross-domain scripts by generating script tags in the current document. Result is returned in a specified callback function <script src=&quot;http://...&quot;> can evaluate scripts from any domain. < serviceHostingEnvironment aspNetCompatibilityEnabled =&quot;true&quot;/> < standardEndpoints > < webScriptEndpoint > < standardEndpoint crossDomainScriptAccessEnabled =&quot;true&quot;/> </ webScriptEndpoint > </ standardEndpoints >
  • 71. JSONP
  • 72. Dynamic Content WCF can automatically create response format based on Content-Type and Accepts headers. Helper methods for creating content Available through WebOperationContext public Message CreateAtom10Response(...); public Message CreateJsonResponse<T>(...); public Message CreateStreamResponse(...); public Message CreateTextResponse(...); public Message CreateXmlResponse(...); public Message CreateXmlResponse<T>(...);
  • 74. Resources http://blogs.microsoft.co.il/blogs/vardi/ A Developer’s Introduction to WCF 4 Beta 1 Service Configuration Improvements in .NET 4 What’s New in WCF 4.0? Jesus Rodriguez's WebLog