How to index documents using Apache Solr?

Question

Solr

Good afternoon, I have Apache Solr 7, which is configured to index the database using the DataImportHandler
Indexing is successful.
The task is that in the database in each line there is also a link to a file located on a network drive, as in this case, this file can also be "feeded" to the index.
As I understand it, Solr itself has some kind of built-in functionality, and there is also the Apache Tika library.
In which direction should you go? (files mostly recognized as PDF, but there are also doc,docx,xlsx, rtf, etc.)

Answer 1

It's better not to use DataImportHandlerit at all.
Causes :
Complex extensibility
Absolutely 0 possibilities for scaling the indexing process
Possible, but very complex and fat-free monitoring of the indexing process.