-
Notifications
You must be signed in to change notification settings - Fork 0
/
fetchId.py
45 lines (35 loc) · 1.15 KB
/
fetchId.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
"""
FetchMongo ExecuteScript
"""
# Authors: Shu Yan <yanshu.usc@gmail.com>
# NiFi Ver: 1.6.0
# Required Property:
# None
# import nifi libraries
from org.apache.commons.io import IOUtils
from java.nio.charset import StandardCharsets
from org.apache.nifi.processor.io import StreamCallback
# import python libraries
import json
class PyStreamCallback(StreamCallback):
def __init__(self):
pass
def process(self, inputStream, outputStream):
obj = json.loads(IOUtils.toString(inputStream, StandardCharsets.UTF_8))
if isinstance(obj, dict):
text = json.dumps({"_id": obj.get("_id")})
elif isinstance(obj, list):
text = json.dumps([{"_id": x.get("_id")} for x in obj])
else:
text = 'none'
outputStream.write(bytearray(text.encode('utf-8')))
# Get flowFile (trigger)
flowFile = session.get()
if flowFile:
flowFile = session.write(flowFile, PyStreamCallback())
try:
flowFile = session.write(flowFile, PyStreamCallback())
session.transfer(flowFile, REL_SUCCESS)
except Exception as e:
log.error(e)
session.transfer(flowFile, REL_FAILURE)