Managed File Transfer

What is the mechanism of enabling the client listening to the target system to see the file only when the transmission is fully completed through Connect Direct?

You can check the transfer status for the particular process number & individual process name

I don't know about a "mechanism" but perhaps, via the Connect:Direct Process language, the file could be transfered with one extension, and subsequently, via a run task step, rename it with the extension the "client" is "listening" for.

E.g., copy the file as farkle.temp, and then, in via Run task, rename the file to be farkle.txt, because you know the client is only listening for .txt files.

An alternative might be to integrate more closely the xfer of the file into the process cycle. Connect:Direct has capability to trigger an application upon successful completion of the transfer. So instead of the application continuously monitoring for the availability of the file, have Connect:Direct signal the application when the file is ready.