Mulesoft - Force exception according to statusCode - exception

Question

I've implemented a Mule flow that reads CSV files and insert the records into Salesforce using a batch.
To manage the errors I have created a step that only accepts failed records.
I've tried modifying the original values so that it fails and proving that it works properly.
The Salesforce response message is a JSON containing a field called statusCode with the following value: INVALID_TYPE_ON_FIELD_IN_RECORD.
However Mule does not recognize it as an error and does not fail so it never enters the Step of failed records.
How can I modify this? Should I change it in Salesforce or add the statusCode cases in Error Mapping?

Answer 1

In Mule 4 you can use raiser-error to force an error. Then you just need to define what expression to trigger your expression:
#[sizeOf((payload.errors default [])) > 0]
or
#[payload.errors[0].statusCode=='INVALID_TYPE_ON_FIELD_IN_RECORD']
etc.
Example using choice router:
<choice doc:name="successful?">
<when expression="#[sizeOf((payload.errors default [])) > 0]">
<raise-error type="APP:INVALID_TYPE_ON_FIELD_IN_RECORD" />
</when>
</choice>
Alternative to controlling flow with errors is setting the acceptExpression on the batch step with the same expression:
<batch:step name="step1" acceptExpression="#[sizeOf((payload.errors default [])) > 0]">