MQSeries.net :: View topic - How to throw a custom exception from a WMB6 web service?

simon.starkie · Posted: Mon Dec 03, 2007 2:49 pm Post subject:

I have a WBM6 message flow exposed as a web service.
When something goes wrong, I need to throw an exception with a custom message, so I used this:
THROW USER EXCEPTION
MESSAGE 2950
VALUES
(
'patientMRN:',InputLocalEnvironment.Variables.MRN
,'regionCode:',InputLocalEnvironment.Variables.IDTYPE
,'errorMessage:',OutputRoot.XMLNSC.ns:KPChartException.ns:errorMessage
)
;
The intent is to allow the web service client code running in WAS to catch the exception and retrieve the custom message:
// instantiate config file (singleton) and check if loaded
ConfigFile cfg = ConfigFile.getConfigFile();

// create KPChartRequest instance
GetKPChartRequestType KPChartRequest = buildKPChartRequest(MRN1, REGION1, DOB1, MRN2, REGION2, DOB2);

// Invoke KPChartService web service to get the Medications
try
{
URL URL = new java.net.URL(ConfigFile.url);
KPChartServiceBindingStub ws = new KPChartServiceBindingStub(URL,svc);
i = Integer.parseInt(ConfigFile.timeout);
ws.setTimeout(i * 1000); // milliseconds
MedicationResponse = ws.getMedication(KPChartRequest);
}
catch (KPChartExceptionType e) {
System.out.println("KPChartException in Medication processing"
+"\nPatientMRN="+e.getPatientMRN().toString()
+"\nRegion="+e.getRegion()
+"\nErrorMessage="+e.getErrorMessage()
);
throw new RuntimeException(e);
}
catch (MalformedURLException e)
{
System.out.println("MalformedURLException in ConfigFile"
+ "/nurl"
);
throw new RuntimeException(e);
}
catch (WebServicesFault e) {
System.out.println("WebServicesFault in Medication processing");
if (e.getFaultDetails() != null)
{
int i = e.getFaultDetails().length;
int j = 0;
while (i > j)
{
System.out.println("\n" + e.getFaultDetails()[j]
);
j++;
}
}
else
System.out.println("WebServicesFault in Medication processing"
+ "\n" + e.getMessage());

throw new RuntimeException(e);
}
catch (RemoteException e)
{
System.out.println("RemoteException in Medication processing"
);
throw new RuntimeException(e);
}

return MedicationResponse;

But this only results in a WebServicesFault being caught in my client.
I never get the KPChartExceptionType so I can't get at the KPChartExceptionType elements.

I looked into writing my own Java Compute Node with code to throw my own KPChartException, but evidently "throws MbException" is the only allowable choice on the Java method "public void evaluate(MbMessageAssembly assembly)" and even when I did change it, the deployment failed but I don't recall the exact error.

So how do I throw a custom exception from a WMB6 web service?
Or is there a limitation in WMB6 that precludes doing this.
Thanks.