Creating multiple consumers/ threads in FTP consumer within single route

Issue

• I want to process files in my SFTP using multiple consumers/threads for faster processing. Currently files are consuming one by one in sequential mannner which takes lot of time. Also this behaviour causes problem where route gets stuck if redeliveryDelay is huge and hence other files are not processed due to redelivery of previous file is under process.
• If i have 50 files in the SFTP server, I want 50 threads to be running simultaneously, read the files and process all the files simultaneously, one file in each thread.