I would like to kick off this forum with the following question.
How would you enable BAM interception when your WCF service uses unmatched message handlers? What is your filter going to look like in the abscence of specific operation names?
Bring your answers in !!
- Amlan
In normal filtering for WCF BAM interception, the Filter node of the interceptor configuration (IC) file would contain:
as in the example below:
<ic:Filter>
<ic:Expression>
<wcf
peration Name="GetServiceContractCallPoint" />
<icperation Name="Constant">
<ic:Argument>ServiceRequest</ic:Argument>
</icperation>
<icperation Name="Equals" />
<wcfperation Name="GetOperationName" />
<icperation Name="Constant">
<ic:Argument>AuthorizeWithDataContract</ic:Argument>
</icperation>
<icperation Name="Equals" />
<icperation Name="And" />
</ic:Expression>
</ic:Filter>
However, in the case when the service is using a unmatched message handlers, the filter would need to be filter by the action.
<ic:Filter>
<ic:Expression>
<wcfperation Name="GetServiceContractCallPoint" />
<icperation Name="Constant">
<ic:Argument>ServiceRequest</ic:Argument>
</icperation>
<icperation Name="Equals" />
<wcfperation Name="XPath">
<wcf:Argument>//s:Envelope/s:Header/a:Action/text()</wcf:Argument>
</wcfperation>
<icperation Name="Constant">
<ic:Argument>http://Microsoft.BAMWCFInterceptor.Test/ITxn/ClientOperation1</ic:Argument>
</icperation>
<icperation Name="Equals" />
<icperation Name="And"/>
</ic:Expression>
</ic:Filter>
Or to simplify the above, in case, you don't want to spell out the whole action including the namespace, you can use the XPath contains command such illustrated as below:
<ic:Filter>
<ic:Expression>
<wcfperation Name="GetServiceContractCallPoint" />
<icperation Name="Constant">
<ic:Argument>ServiceRequest</ic:Argument>
</icperation>
<icperation Name="Equals" />
<wcfperation Name="XPath">
<wcf:Argument>contains(//s:Envelope/s:Header/a:Action/text(),"ClientOperation1")</wcf:Argument>
</wcfperation>
<icperation Name="And"/>
</ic:Expression>
</ic:Filter>
You could also filter by the content within the message, especially when the message is a response message, like this:
(It's cheesy I know...)
<bam:OnEvent IsEnd="true" Name="WCF_OrderShipped_Response" Source="WCF_Service_OrderShipment">
<bam:Filter>
<bam:Expression>
<wcf:Operation Name="GetServiceContractCallPoint" />
<bam:Operation Name="Constant">
<bam:Argument>ServiceReply</bam:Argument>
</bam:Operation>
<bam:Operation Name="Equals"/>
<wcf:Operation Name="XPath" >
<wcf:Argument >//s:Body/*[local-name()='ShipServiceResponse' and namespace-uri()='http://QuickLearn/Demo/Services']/*[local-name()='ServiceData' and namespace-uri()='']/*[local-name()='recordBamActivity' and namespace-uri()='']</wcf:Argument>
</wcf:Operation>
<bam:Operation Name="Constant">
<bam:Argument>true</bam:Argument>
</bam:Operation>
<bam:Operation Name="Equals"/>
<bam:Operation Name="And" />
</bam:Expression>
</bam:Filter>
