WSO2 ESB: Display dataService response - sequence

Question

How do you display the response returned by calling a webservice endpoint on a sequence?
Below is the sequence that I use. I would like to display the return value from the dataservice called "CDServiceEndpoint" on the wso2carbon.log. Is that possible? If not, how can I get the data displayed.
<sequence xmlns="http://ws.apache.org/ns/synapse" name="ConcurGetADPExtractFlow" onError="GeneralErrorHandler">
<property xmlns:ns="http://org.apache.synapse/xsd" xmlns:ns3="http://org.apache.synapse/xsd" name="current-context-details" expression="concat(get-property('current-context-details'), ', ConcurGetADPExtractFlow')" />
<property name="scenario" value="ConcurGetADPExtractFlow" />
<log level="custom">
<property name="DEBUGGING" value="ConcurGetADPExtractFlow" />
<property name="start-date" value="2015-02-23" />
<property xmlns:ns="http://org.apache.synapse/xsd" xmlns:ns3="http://org.apache.synapse/xsd" name="End Date" expression="get-property('current-date')" />
</log>
<xslt key="Concur_Get_ADP_Extract_Transformation">
<property name="start-date" value="2015-03-02" />
<property xmlns:ns="http://org.apache.synapse/xsd" xmlns:ns3="http://org.apache.synapse/xsd" name="end-date" expression="get-property('current-date')" />
</xslt>
<property name="post-data-service-sequence" value="ConcurTransformADPExtractFlow" />
<property name="OUT_ONLY" value="false" />
<send receive="DataServiceInvocationErrorFlow">
<endpoint key="ConcurDataServiceEndpoint" />
</send>
<description>Sends a request to the data service for the ADP extract data.</description>
</sequence>
Below is how my DataServiceInvocationErrorFlow looks like.
<sequence xmlns="http://ws.apache.org/ns/synapse" name="DataServiceInvocationErrorFlow">
<filter xmlns:ns="http://org.apache.synapse/xsd" xmlns:m="http://ws.wso2.org/dataservice" xmlns:ns3="http://org.apache.synapse/xsd" xpath="//m:DataServiceFault">
<then>
<log level="custom">
<property name="status" value="data-service-fault" />
</log>
<property name="error_message" expression="//m:DataServiceFault" />
<sequence key="GeneralErrorHandler" />
<drop />
</then>
<else>
<filter source="string-length(get-property('ERROR_MESSAGE'))" regex="0.0">
<then>
<filter xpath="//soapenv:Fault">
<then>
<log level="custom">
<property name="status" value="ERROR" />
</log>
<property name="error_message" expression="//soapenv:Fault" />
<sequence key="GeneralErrorHandler" />
<drop />
</then>
<else>
<log level="custom">
<property name="status" value="success response from DSS" />
</log>
<filter source="string-length(normalize-space(get-property('post-data-service-sequence')))" regex="0.0">
<then />
<else>
<property name="temp-post-data-service-sequence" expression="get-property('post-data-service-sequence')" />
<property name="post-data-service-sequence" value="" />
<sequence key="{get-property('temp-post-data-service-sequence')}" />
</else>
</filter>
</else>
</filter>
</then>
<else>
<property name="error_message" expression="get-property('ERROR_MESSAGE')" />
<sequence key="GeneralErrorHandler" />
<drop />
</else>
</filter>
</else>
</filter>
</sequence>

Answer 1

If by CDServiceEndpoint you meant ConcurDataServiceEndpoint, then you are already handling the response from that endpoint in your DataServiceInvocationErrorFlow sequence that you defined on the Send mediator, which by the way is confusingly named, since your receive sequence will run no matter if you get an error response or a good one. All you need to do is log it inside DataServiceInvocationErrorFlow using Log mediator.
Had you not defined a receive sequence on your Send mediator, the response would have gotten to your outSequence, where you can log it with Log mediator too.