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[英]getting syntax error from nifi ExecuteScript processor inspite of correct python code
[英]Nifi getting error in ExecuteScript
我一直在嘗試從nifi的ExecuteScript Processor中提取數據並將其作為屬性附加到流文件中。 我已經嘗試了很多方法,尤其是Matt Burgess的funnifi博客中的方法。
以下是我的代碼
import json
import java.io
from org.apache.commons.io import IOUtils
from java.nio.charset import StandardCharsets
from org.apache.nifi.processor.io import StreamCallback
originalFlowFile = session.get()
text = IOUtils.toString(originalFlowFile)
log.info(text)
if(originalFlowFile != None):
event = json.loads(text)
if (event['true'] == 'Y'):
flowfile = session.putAttribute(flowfile, "true", "Y")
elif (event['src'] == 'ONE' ):
allAttributes = { "true": "N", "src": "ONE" }
flowfile = session.putAllAttributes(flowfile, allAttributes)
elif (event['src'] == 'TWO' ):
allAttributes = { "true": "N", "src": "TWO" }
flowfile = session.putAllAttributes(flowfile, allAttributes)
session.transfer(flowFile, REL_SUCCESS)
session.commit()
這是在python中。 流文件數據是JSON。 不過,我無法解析它。
INFO部分是的輸出
text = IOUtils.toString(originalFlowFile)
任何幫助將不勝感激。
ps我不熟悉python
測試數據
{
"true":"N",
"src":"ONE",
"var1":"value1",
"var2":"value2"
}
UPDATE
我的更新代碼仍然無效:
import json
import java.io
from org.apache.commons.io import IOUtils
originalFlowFile = session.get()
if(originalFlowFile != None):
inputStream = session.read(originalFlowFile)
text = IOUtils.toString(inputStream)
log.info(text)
event = json.loads(text)
if (event['true'] == 'Y'):
flowfile = session.putAttribute(flowfile, "true", "Y")
elif (event['src'] == 'ONE' ):
allAttributes = { "true": "N", "src": "ONE" }
flowfile = session.putAllAttributes(flowfile, allAttributes)
elif (event['src'] == 'TWO' ):
allAttributes = { "true": "N", "src": "TWO" }
flowfile = session.putAllAttributes(flowfile, allAttributes)
session.transfer(flowFile, REL_SUCCESS)
session.commit()
在流文件本身上調用IOUtils.toString()可能無法正常工作,因為流文件不是InputStream,Reader或可以自行讀取的東西。 實際上,令我驚訝的是,該行沒有產生異常。
您可以通過兩種方式獲取流文件的內容...
首先是通過從會話獲取流文件的InputStream:
originalFlowFile = session.get();
inputStream = session.read(originalFlowFile);
text = IOUtils.toString(inputStream);
第二個是通過使用InputStreamCallback:
flowFile = session.read(flowFile, {inputStream ->
// read the inputStream
} as InputStreamCallback);
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