How does one validate submission-time values?

Question

SPL supports submission-time values, which are retrieved via function calls getSubmissionTimeValue() and/or getSubmissionTimeListValue(). Since there is no main() function in an SPL program, how can I validate these values in an operator?

Answer 1

In the param clause or logic state clause, assign a variable via means of an SPL function. Perform your validation in the SPL function.

stream<blob incoming_data, uint32 source_port> DataStream
as UDPReceiver = UDPSource() {
   param
      address : getConfig('exporter'); // IP address or host name

stream<blob incoming_data, uint32 source_port> NextStream
as Parser = Custom(DataStream) {
   logic
      state: {
          MyInfoMap _my_info_map = getInfoAsMap();

Above, SPL functions getConfig() and getInfoAsMap() would retrieve the submission-time values and validate them.