caproto.server.autosave.RotatingFileManager

class caproto.server.autosave.RotatingFileManager(filename, *, max_files_per_day=5, max_file_age=30, date_suffix='_%Y%m%d-%H%M%S', logger=<Logger caproto.server.autosave (WARNING)>)

Save to a primary filename, while rotating out old copies.

Automatically prunes old copies of the file beyond a certain age or a maximum file count (overall or per day).

Files will first be pruned by the overall age cutoff, then on a per day basis.

Parameters:

filenamestr

The primary filename that should be used.

max_files_per_dayint, optional

Remove the oldest files in a given day.

max_file_ageint, optional

Prune files beyond this cutoff.

date_suffixstr, optional

Defaults to “_%Y%m%d-%H%M%S” - used by strftime/strptime.

loggerlogging.Logger, optional

The logger instance to use for messages. Defaults to the module logger.

Methods

prune_files()	Prune files that are outside of the configured maximum times.
rotate_in_file(fn)	Move a valid file from another location to self.filename and prune.

Attributes

directory	The directory holding the save file.
files_by_age	Get a dictionary of {age_timedelta: filename}.
glob_string	The glob string which can be used to find matching files.
date_suffix
filename
log
max_file_age
max_files_per_day