I have a flowfile attribute which is a UTC datetime in the format of yyyy-MM-dd HH:mm:ss.SSS
I need to convert this to a unix timestamp.
How can this be done? I know its possible to convert Unix to the above format using Jolt:
"time": "${time:format('yyyy-MM-dd HH:mm:ss.SSS')}"
however, im not sure how to do this in reverse?
Working with attributes in this way uses the NiFi Expression Langauge (not Jolt).
See the docs here https://nifi.apache.org/docs/nifi-docs/html/expression-language-guide.html
${time:format('yyyy-MM-dd HH:mm:ss.SSS')}
Uses Expression Language to format the time attribute to the given SimpleDateFormat string.
${time:toNumber()}
Uses Expression Language to convert the given Date object to Epoch Millis.
https://nifi.apache.org/docs/nifi-docs/html/expression-language-guide.html#tonumber