Nifi

@sathish3389 ,

One way to do this is to use the ExecuteScript processor with a script like the one below. This script with set the attribute dv_sys_id with the content that you want and will also add that to the content of the flowfile.

from org.apache.commons.io import IOUtils
from java.nio.charset import StandardCharsets
from org.apache.nifi.processor.io import StreamCallback
import json

class PyStreamCallback(StreamCallback):
    def __init__(self):
        self.dv_sys_id = None

    def process(self, inputStream, outputStream):
        text = IOUtils.toString(inputStream, StandardCharsets.UTF_8)
        obj = json.loads(text)
        self.dv_sys_id = 'dv_sys_id=%s' % (','.join(obj['dv_sys_id'],))
        outputStream.write(bytearray(self.dv_sys_id.encode('utf-8','ignore')))

flow_file = session.get()
if flow_file != None:
    callback = PyStreamCallback()
    flow_file = session.write(flow_file, callback)
    flow_file = session.putAttribute(flow_file, 'dv_sys_id', callback.dv_sys_id)
    session.transfer(flow_file, REL_SUCCESS)

Cheers,

André