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infosphere-spl

How does one validate submission-time values?

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?

Solution

  • 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.