file

The file service can be used for logging incoming topics, archiving, etc. Each message is written to a path specified in the targets list. Note that files are opened for appending and then closed on each notification.

Supposing we wish to archive all incoming messages to the branch arch/# to a file /data/arch, we could configure the following:

[config:file]
append_newline = True
targets = {
    'log-me'    : ['/data/arch']
   }