In this scenario, a pre-job and a post-job are added to the Job describes in tfilelist_titeratetoflow-tfileoutputdelimited-tlogrow_finding-duplicate-files-between-two-folders_standard_component_this-scena_c.html to handle files before and after the execution of the main data Job.
For more technologies supported by Talend, see Talend components.
As described in the above-mentioned scenario, when the main data Job is started, it creates a temporary text file to store the fetched filenames. If the specified temporary file already exists, it will be overwritten.
To prevent possible loss of data, the pre-job saves a backup copy of the specified file by renaming it, if it exists, before the main Job is executed.
After the execution of the main data Job, the post-job deletes the temporary file created by the data Job and restores the backup file, if any.