Once again I have to get max-value of a date. This time an attribute holds the JSON to be checked not the FF-content. This is the content of attribute RESPONSE: [{"id":"(1208)","datbis":"20190630"},{"id":"(1210)","datbis":"20191231"}] With the script of above discussed problem and this information https://gist.github.com/mattyb149/478864017ec70d76f74f (thanks to @Matt Burgess ) it was possible to adjust the script for doing the check in the ff-attribute. Just in case some else has to solve this too here the script: def flowFile = session.get()
if(!flowFile) return
try {
def objList = new groovy.json.JsonSlurper().parseText(flowFile.getAttribute('RESPONSE'))
def max = objList.max {Date.parse("yyyyMMdd",it.datbis)}
flowFile = session.putAttribute(flowFile, 'MAX_datbis', max.datbis.toString())
session.transfer(flowFile, REL_SUCCESS)
} catch(e) {
log.error("Error while determining max", e)
session.transfer(flowFile, REL_FAILURE)
}
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