Problem Calling a WebService multiple times

Question

Hi Guys,
I am a relatively new user of DS 12.2 doing a proof-of-concept to call an in-house WebService for a batch of customer records - lets say 1000.
The WS has an input schema where it's parameters are within a nested table such that it can be called for many customers in a single call if desired. WS input schema (made-up example)=
-WS
--$REQUEST_SCHEMA **added by DS on import
---CustVerification
src_nr
src_state
I have successfully been able to create a Data-Flow that builds the input-schema such that 1 WS call is made with a nested input of all 1000 customers. This works and the output from the single call is correct (many records relating to the many inputs etc). Input schema =
- <CustVerification>
- <Details>
<src_nr>1234<src_nr />
<src_state>KY</src_state>
</Details>
- <Details>
<src_nr>1234<src_nr />
<src_state>KY</src_state>
</Details>
- <Details>
<src_nr>1234<src_nr />
<src_state>KY</src_state>
</Details>
</CustVerification>
Now the problem - I am wanting to do this flow so that it calls the WS once PER customer i.e. 1 entry in many of the nested CustVerification structures.
I have, again, been able to produce the correct XML schema (at least it looks correct) which repeats the Input Schema for each customer record. HOWEVER, when hooking this up to the function call of the WS as before, I either get only 1 single call like before with the last entry in the file run through it..... or, after playing with the query's input schema to add an extra root level and changing FROM clauses to map to the function call schema I then get a huge ACCESS_VIOLATION dump which mentions "LoadDFXML::put_string()+2427 byte(s)" and other such XML-related but non-helpful messages.
New input schema is:
- <CustVerification>
- <Details>
<src_nr>1234<src_nr />
<src_state>KY</src_state>
</Details>
</CustVerification>
- <CustVerification>
- <Details>
<src_nr>1234<src_nr />
<src_state>KY</src_state>
</Details>
</CustVerification>
- <CustVerification>
- <Details>
<src_nr>1234<src_nr />
<src_state>KY</src_state>
</Details>
</CustVerification>
So.... am I missing something simple in how I call a WS multiple times as opposed to once with multiple inputs? Could this be a setting/property somewhere? IS this linked with how I do a QueryTransform in a certain way to get the function called the right number of times? Anything else??
Thanks for any advice/help.
Flip.

Answer 1

Thanks for the responses guys.... I actually got past the error with a change to the NRDM structure (as mentioned in the first reply, I think a small problem here really changes things).
So - what I had to do to get this working properly was to add a new 'dummy' level into the structure - this kept it clean to denote that the 1 large bulk of messages were going to be sent through the WS many times. So - structure looks like this:
Input_Query:
- <ROOT>
- <CustVerification>
- <Details>
<src_nr>1234<src_nr />
<src_state>KY</src_state>
</Details>
</CustVerification>
- <CustVerification>
- <Details>
<src_nr>1234<src_nr />
<src_state>KY</src_state>
</Details>
</CustVerification>
- <CustVerification>
- <Details>
<src_nr>1234<src_nr />
<src_state>KY</src_state>
</Details>
</CustVerification>
</ROOT>
Then, in the Output schema for the function call, I had to create a dummy extra schema level also - say 'WS_Call', and put the function call within this structure. The FROM mapping has to be set so that both the input_query level AND the input_query.root level are mapped to the WS_Call schema.
And then it works!
Summary -- its a bugger.... but playing with the structure levels (and adding your own at times) and FROM clauses can work!
Cheers,
Flip.