I will try this first thing when I get back on this system this evening.
Thank you for your reply Matt.
One followup: are there any imports i am overlooking to use json.each? I
don't think so, but wanted to check now. Currently I import these json
libraries, which I believe are baked into nifi groovy in my version, 1.16.3:
import groovy.json.JsonSlurper
import groovy.json.JsonOutput
On Mon, May 8, 2023 at 10:38 PM Matt Burgess <mattyb...@apache.org> wrote:
> I believe it's your "json.each { jsonObj ->" line, with a JSON object
> it's going to return a key/value pair so try "json.each { k,v ->"
> instead and use the key k and value v in your script.
>
> On Mon, May 8, 2023 at 9:32 PM James McMahon <jsmcmah...@gmail.com> wrote:
> >
> > Hello. I have incoming data that is json. An example of one case looks
> like this:
> >
> > {"id": "20230508215236_4447cd0a-9dca-47cb-90b1-6562cf34155a_Timer-Driven
> Process Thread-9",
> > "te": "0.9494",
> > "diskusage": "0.2776125422110003.3 MB",
> > "memory": 77,
> > "cpu": 0.58,
> > "host": "172.31.73.197/ip-172-31-73-197.ec2.internal",
> > "temperature": "97",
> > "macaddress": "f417ead3-4fa9-4cee-a14b-7172e9ecd3ea",
> > "end": "61448816405795",
> > "systemtime": "05/08/2023 16:52:36"}
> >
> >
> > I wrote a Groovy script running in a nifi ExecuteScript processor to
> tally the keys from the json, reporting the results as flowfile attributes.
> I am getting this error:
> >
> > ExecuteScript[id=028b1d40-33a5-1766-b659-31b3faaf13f5] Error processing
> json fields: groovy.lang.MissingMethodException: No signature of method:
> Script9$_run_closure1$_closure2$_closure4.doCall() is applicable for
> argument types: (Entry) values:
> [id=20230508215236_4447cd0a-9dca-47cb-90b1-6562cf34155a_Timer-Driven
> Process Thread-9]
> > Possible solutions: doCall(java.lang.Object, java.lang.Object),
> findAll(), findAll(), isCase(java.lang.Object), isCase(java.lang.Object)
> >
> >
> >
> > What is causing this error? Am I reading in the data incorrectly using
> the JsonSlurper?
> >
> >
> >
> > Here is my code:
> >
> > import groovy.json.JsonSlurper
> > import groovy.json.JsonOutput
> > import org.apache.commons.io.IOUtils
> > import java.nio.charset.StandardCharsets
> >
> > def originalFile = ''
> > def keys = []
> > def tallyMap = [:]
> > def topValuesMap = [:]
> > def lineCount = 0
> >
> > def ff = session.get()
> > if (!ff) return
> > try {
> > session.read(ff, { inputStream ->
> > def json = new
> JsonSlurper().parseText(IOUtils.toString(inputStream,
> StandardCharsets.UTF_8))
> >
> >
> > def keySet = new HashSet<String>()
> >
> > if (json instanceof List) {
> > keySet.addAll(((Map)json[0]).keySet())
> > } else {
> > keySet.addAll(json.keySet())
> > }
> >
> > keys = keySet.toList()
> > originalFile = ff.getAttribute('filename')
> >
> >
> > json.each { jsonObj ->
> > jsonObj.each { key, value ->
> > if (value != null && !value.toString().trim().isEmpty())
> {
> > tallyMap[key] = tallyMap.containsKey(key) ?
> tallyMap[key] + 1 : 1
> > if (topValuesMap.containsKey(key)) {
> > def valuesMap = topValuesMap[key]
> > valuesMap[value] = valuesMap.containsKey(value)
> ? valuesMap[value] + 1 : 1
> > topValuesMap[key] = valuesMap
> > } else {
> > topValuesMap[key] = [:].withDefault{ 0
> }.plus([value: 1])
> > }
> > // Remove the "value: 1" entry from the topValuesMap
> > topValuesMap[key].remove("value")
> > }
> > }
> > }
> >
> > // Sort the topValuesMap for each key based on the frequency of
> values
> > topValuesMap.each { key, valuesMap ->
> > topValuesMap[key] = valuesMap.sort{ -it.value }.take(10)
> > }
> >
> >
> > // Count the number of JSON records
> > lineCount += json.size()
> > } as InputStreamCallback)
> >
> > def tallyMapString = JsonOutput.toJson(tallyMap)
> > def topValuesMapString = JsonOutput.toJson(topValuesMap)
> >
> > ff = session.putAttribute(ff, 'triage.json.file', originalFile)
> > ff = session.putAttribute(ff, 'triage.json.fields', keys.join(","))
> > ff = session.putAttribute(ff, 'triage.json.tallyMap', tallyMapString)
> > ff = session.putAttribute(ff, 'triage.json.topValuesMap',
> topValuesMapString)
> > ff = session.putAttribute(ff, 'triage.json.lineCount',
> lineCount.toString())
> > session.transfer(ff, REL_SUCCESS)
> >
> > } catch (Exception e) {
> > log.error('Error processing json fields', e)
> > session.transfer(ff, REL_FAILURE)
> > }
> >
> >
> >
>
