Hi, I wrote some time ago several connectors for Apache Flink that are open sourced under the Apache License:
* HadoopOffice: Process Excel files (reading/writing) (.xls,.xlsx) in Flink using the datasource or Table API: https://github.com/ZuInnoTe/hadoopoffice/wiki/Using-Apache-Flink-to-read-write-Excel-documents * HadoopCryptoLedger: Process blockchains (Bitcoin/Ethereum/Altcoins etc.) in Flink using the datasource or Table API: https://github.com/ZuInnoTe/hadoopcryptoledger/wiki Happy to hear back from you about them. Feel free to raise issues in the corresponding Github projects for new features or issues you face. thank you. best regards, Jörn
