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I've been playing lately with a few WCF features as well as with the WCF Adapter in BizTalk Server 2006 R2. As part of that I had a need to set up a receive location using one of the WCF HTTP-based bindings.
Normally, this isn't a big deal; you can easily use the BizTalk WCF Service Publishing Wizard to create the receive location and IIS service application for an orchestration or from a set of BizTalk schemas.
However, this time I did not want to go that way. What I really wanted was just a simple receive location that would simply receive messages and submit them over to BizTalk without tying the receive location to a specific service definition. As far as I could see, the Service Publishing Wizard didn't really have an option for this, but I was confident it could be made to work.
To be honest, I did have a set of schemas I wanted to work with and even a bunch of predefined WSDL files. However, for many reasons (including the sheer complexity of the schemas and WSDL files involved) I didn't want to get that involved in my initial BizTalk message receiver and processor.
Fortunately, turns out that doing what I wanted was fairly easy stuff. In fact, it was so easy that was able to leverage an existing service I had previously created. I basically just copied the .SVC file (and renamed it) alongside the web.config file. I explicitly ignored all the stuff that normally gets generated under the App_Data directory.
I then manually created a matching receive location in BizTalk using the WCF-BasicHTTP adapter, and this worked right away perfectly for my needs!
Just in case you've never looked at what a WCF HTTP receive location generated files look like, it's actually fairly simple stuff. The SVC file contains just a single directive as expected:
<%@ ServiceHost Language="c#" Factory="Microsoft.BizTalk.Adapter.Wcf.Runtime.BasicHttpWebServiceHostFactory, Microsoft.BizTalk.Adapter.Wcf.Runtime, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" %>
You can see here that it references the WCF-BasicHTTP adapter. If you wanted to use, say, the WCF-WSHttp Adapter, then you'd use Microsoft.BizTalk.Adapter.Wcf.Runtime.WSHttpWebServiceHostFactory class instead.
Microsoft.BizTalk.Adapter.Wcf.Runtime.WSHttpWebServiceHostFactory
The config file is pretty much the default config file generated by the Service Publishing Wizard as well:
<?xml version="1.0" encoding="utf-8"?> <configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0"> <configSections> <section name="bizTalkSettings" type="Microsoft.BizTalk.Adapter.Wcf.Runtime.BizTalkConfigurationSection, Microsoft.BizTalk.Adapter.Wcf.Runtime, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" /> </configSections> <bizTalkSettings> <mexServiceHostFactory debug="false"> <receiveLocationMappings> <!--add markupFileName="*.svc" receiveLocationName="?" publicBaseAddress="protocol://host[:port]" /--> </receiveLocationMappings> </mexServiceHostFactory> <webServiceHostFactory debug="false" /> <isolatedReceiver disable="false" /> <btsWsdlExporter disable="false" /> </bizTalkSettings> <appSettings /> <connectionStrings /> <system.web> <compilation defaultLanguage="c#" debug="false"> <assemblies> <add assembly="mscorlib, version=2.0.0.0, culture=neutral, publickeytoken=b77a5c561934e089" /> <add assembly="Microsoft.BizTalk.Adapter.Wcf.Common, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" /> <add assembly="Microsoft.BizTalk.Adapter.Wcf.Runtime, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" /> </assemblies> </compilation> <authentication mode="Windows" /> </system.web> <system.serviceModel> <behaviors> <serviceBehaviors> <behavior name="ServiceBehaviorConfiguration"> <serviceDebug httpHelpPageEnabled="true" httpsHelpPageEnabled="false" includeExceptionDetailInFaults="false" /> <serviceMetadata httpGetEnabled="false" httpsGetEnabled="false" /> </behavior> </serviceBehaviors> </behaviors> <services> <service name="Microsoft.BizTalk.Adapter.Wcf.Runtime.BizTalkServiceInstance" behaviorConfiguration="ServiceBehaviorConfiguration"> <!--<endpoint name="HttpMexEndpoint" address="mex" binding="mexHttpBinding" bindingConfiguration="" contract="IMetadataExchange" />--> <!--<endpoint name="HttpsMexEndpoint" address="mex" binding="mexHttpsBinding" bindingConfiguration="" contract="IMetadataExchange" />--> </service> </services> </system.serviceModel> </configuration>
It's extremely nice to see how the WCF adapter in BizTalk leverages a bunch of my favorite features in WCF to make this a lot simpler (compared to, say, the whole bunch of code that needed to be generated for the original SOAP adapter).
I should mention though, that part of what made it so easy was that my needs were pretty simple: I wanted a simple two-way (request/response) port, and needed no metadata (WSDL) publishing at all (as I said, I already had working WSDL files I could provide to consumers of the service). Making it one-way wouldn't have been a problem though; as the WCF adapter handles it very gracefully as well.
Tomas Restrepo is a software developer located in Colombia, South America. His interests include .NET, Connected Systems, PowerShell and lately dynamic programming languages. More...
email: tomas@winterdom.com msn: tomasr@passport.com
Copyright © 2002-2008, Tomas Restrepo.
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