问题
I am trying to insert XML data into Cassandra DB. Please can somebody suggest the flow in nifi. I have JMS on which I need to post messagedata and then consume & insert the data into Cassandra.
回答1:
I'm not sure if you can directly ingest XML into Cassandra. However you could convert the XML to JSON using the TransformXml processor (and this XSLT), or as of NiFi 1.2.0, you can use ConvertRecord by specifying the input and output schemas.
If there are multiple XML records per flow file and you need one CQL statement per record, you may need SplitJson or SplitRecord after the XML-to-JSON conversion has taken place.
Then you can use ReplaceText to form a CQL statement to insert the JSON, then PutCassandraQL to push to Cassandra. Alternatively you can use CQL map syntax to insert into a map field, etc.
来源：https://stackoverflow.com/questions/45283929/nifi-loading-xml-data-into-cassandra