Question about file transfer

How can I transfer files from a DB database server to an external server and then return them to the DB database using a ' middle ' server?

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In more detail:

Solution Outline

1. Start a database procedure to generate an exchange file and transfer this file to a "middle" server.
2. Determine the size of the transfer file on the middle server and use a script to transfer this file to an external server.
3. Process data on the external server and confirm that the result file have been generated before starting a script on the middle server to transfer the file from external server to the middle one.
4. After the script in step 3 has finished transferring the file from the external server, start a database procedure to import the transferred file to the database.

The file movements would look like this:

Schema of File Movements

Question about scripts and database procedures

In particular, I want to know how to invoke remote script and DB database procedure? I checked the document in your official website but didn’t get any clue about this. Can jobscheduler JobScheduler fulfill our requirement?
Thanks.

Solution Outline

There are several ways to implement such a scenario.

A typical workflow would be to use a single JobScheduler installed on the middle server with a job chain with several steps:

• Step (1) start the db database report. you You can use the SQL*Plus, PL/SQL or the ManagedDatabase jobs from the JITL package.

• Step (2) check the size/existence/content of the output from step 1 using the existsFile job from the JITL -Packagepackage.
• Step (3) transfer the file from the middle server to the external one using, for example, sFTP SFTP and the JADE-Job from the JITL package.
• Step (4) start the processing on the external server using SSH.

• Step (5) Use sFtp SFTP and the JADE -Job job to transfer the result of step (4) to the middle server.

• Step (6) Start the processing of the result file using, for example, SQL*Plus or PL/SQL.