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# -*- Mode:Python; indent-tabs-mode:nil; tab-width:4 -*-
#
# Copyright 2002 Ben Escoto <ben@emerose.org>
# Copyright 2007 Kenneth Loafman <kenneth@loafman.com>
#
# This file is part of duplicity.
#
# Duplicity is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your
# option) any later version.
#
# Duplicity is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with duplicity; if not, write to the Free Software Foundation,
# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""Generate and process backup statistics"""
from future_builtins import map
import re, time, os
from duplicity import dup_time
class StatsException(Exception):
pass
class StatsObj:
"""Contains various statistics, provide string conversion functions"""
# used when quoting files in get_stats_line
space_regex = re.compile(" ")
stat_file_attrs = ('SourceFiles',
'SourceFileSize',
'NewFiles',
'NewFileSize',
'DeletedFiles',
'ChangedFiles',
'ChangedFileSize',
'ChangedDeltaSize',
'DeltaEntries',
'RawDeltaSize')
stat_misc_attrs = ('Errors',
'TotalDestinationSizeChange')
stat_time_attrs = ('StartTime',
'EndTime',
'ElapsedTime')
stat_attrs = (('Filename',) + stat_time_attrs +
stat_misc_attrs + stat_file_attrs)
# Below, the second value in each pair is true iff the value
# indicates a number of bytes
stat_file_pairs = (('SourceFiles', False),
('SourceFileSize', True),
('NewFiles', False),
('NewFileSize', True),
('DeletedFiles', False),
('ChangedFiles', False),
('ChangedFileSize', True),
('ChangedDeltaSize', True),
('DeltaEntries', False),
('RawDeltaSize', True))
# This is used in get_byte_summary_string below
byte_abbrev_list = ((1024*1024*1024*1024, "TB"),
(1024*1024*1024, "GB"),
(1024*1024, "MB"),
(1024, "KB"))
def __init__(self):
"""Set attributes to None"""
for attr in self.stat_attrs:
self.__dict__[attr] = None
def get_stat(self, attribute):
"""Get a statistic"""
return self.__dict__[attribute]
def set_stat(self, attr, value):
"""Set attribute to given value"""
self.__dict__[attr] = value
def increment_stat(self, attr):
"""Add 1 to value of attribute"""
self.__dict__[attr] += 1
def get_total_dest_size_change(self):
"""Return total destination size change
This represents the total increase in the size of the
duplicity destination directory, or None if not available.
"""
return 0 # this needs to be re-done for duplicity
def get_stats_line(self, index, use_repr = 1):
"""Return one line abbreviated version of full stats string"""
file_attrs = [str(self.get_stat(a)) for a in self.stat_file_attrs]
if not index:
filename = "."
else:
filename = os.path.join(*index)
if use_repr:
# use repr to quote newlines in relative filename, then
# take of leading and trailing quote and quote spaces.
filename = self.space_regex.sub("\\x20", repr(filename)[1:-1])
return " ".join([filename,] + file_attrs)
def set_stats_from_line(self, line):
"""Set statistics from given line"""
def error():
raise StatsException("Bad line '%s'" % line)
if line[-1] == "\n":
line = line[:-1]
lineparts = line.split(" ")
if len(lineparts) < len(self.stat_file_attrs):
error()
for attr, val_string in zip(self.stat_file_attrs,
lineparts[-len(self.stat_file_attrs):]):
try:
val = int(val_string)
except ValueError:
try:
val = float(val_string)
except ValueError:
error()
self.set_stat(attr, val)
return self
def get_stats_string(self):
"""Return extended string printing out statistics"""
return "%s%s%s" % (self.get_timestats_string(),
self.get_filestats_string(),
self.get_miscstats_string())
def get_timestats_string(self):
"""Return portion of statistics string dealing with time"""
timelist = []
if self.StartTime is not None:
timelist.append("StartTime %.2f (%s)\n" %
(self.StartTime, dup_time.timetopretty(self.StartTime)))
if self.EndTime is not None:
timelist.append("EndTime %.2f (%s)\n" %
(self.EndTime, dup_time.timetopretty(self.EndTime)))
if self.ElapsedTime or (self.StartTime is not None and
self.EndTime is not None):
if self.ElapsedTime is None:
self.ElapsedTime = self.EndTime - self.StartTime
timelist.append("ElapsedTime %.2f (%s)\n" %
(self.ElapsedTime, dup_time.inttopretty(self.ElapsedTime)))
return "".join(timelist)
def get_filestats_string(self):
"""Return portion of statistics string about files and bytes"""
def fileline(stat_file_pair):
"""Return zero or one line of the string"""
attr, in_bytes = stat_file_pair
val = self.get_stat(attr)
if val is None:
return ""
if in_bytes:
return "%s %s (%s)\n" % (attr, val,
self.get_byte_summary_string(val))
else:
return "%s %s\n" % (attr, val)
return "".join(map(fileline, self.stat_file_pairs))
def get_miscstats_string(self):
"""Return portion of extended stat string about misc attributes"""
misc_string = ""
tdsc = self.TotalDestinationSizeChange
if tdsc is not None:
misc_string += ("TotalDestinationSizeChange %s (%s)\n" %
(tdsc, self.get_byte_summary_string(tdsc)))
if self.Errors is not None:
misc_string += "Errors %d\n" % self.Errors
return misc_string
def get_byte_summary_string(self, byte_count):
"""Turn byte count into human readable string like "7.23GB" """
if byte_count < 0:
sign = "-"
byte_count = -byte_count
else:
sign = ""
for abbrev_bytes, abbrev_string in self.byte_abbrev_list:
if byte_count >= abbrev_bytes:
# Now get 3 significant figures
abbrev_count = float(byte_count)/abbrev_bytes
if abbrev_count >= 100:
precision = 0
elif abbrev_count >= 10:
precision = 1
else:
precision = 2
return "%s%%.%df %s" % (sign, precision, abbrev_string) \
% (abbrev_count,)
byte_count = round(byte_count)
if byte_count == 1:
return sign + "1 byte"
else:
return "%s%d bytes" % (sign, byte_count)
def get_stats_logstring(self, title):
"""Like get_stats_string, but add header and footer"""
header = "--------------[ %s ]--------------" % title
footer = "-" * len(header)
return "%s\n%s%s\n" % (header, self.get_stats_string(), footer)
def set_stats_from_string(self, s):
"""Initialize attributes from string, return self for convenience"""
def error(line):
raise StatsException("Bad line '%s'" % line)
for line in s.split("\n"):
if not line:
continue
line_parts = line.split()
if len(line_parts) < 2:
error(line)
attr, value_string = line_parts[:2]
if attr not in self.stat_attrs:
error(line)
try:
try:
val1 = int(value_string)
except ValueError:
val1 = None
val2 = float(value_string)
if val1 == val2:
self.set_stat(attr, val1) # use integer val
else:
self.set_stat(attr, val2) # use float
except ValueError:
error(line)
return self
def write_stats_to_path(self, path):
"""Write statistics string to given path"""
fin = path.open("w")
fin.write(self.get_stats_string())
assert not fin.close()
def read_stats_from_path(self, path):
"""Set statistics from path, return self for convenience"""
fp = path.open("r")
self.set_stats_from_string(fp.read())
assert not fp.close()
return self
def stats_equal(self, s):
"""Return true if s has same statistics as self"""
assert isinstance(s, StatsObj)
for attr in self.stat_file_attrs:
if self.get_stat(attr) != s.get_stat(attr):
return None
return 1
def set_to_average(self, statobj_list):
"""Set self's attributes to average of those in statobj_list"""
for attr in self.stat_attrs:
self.set_stat(attr, 0)
for statobj in statobj_list:
for attr in self.stat_attrs:
if statobj.get_stat(attr) is None:
self.set_stat(attr, None)
elif self.get_stat(attr) is not None:
self.set_stat(attr, statobj.get_stat(attr) +
self.get_stat(attr))
# Don't compute average starting/stopping time
self.StartTime = None
self.EndTime = None
for attr in self.stat_attrs:
if self.get_stat(attr) is not None:
self.set_stat(attr,
self.get_stat(attr)/float(len(statobj_list)))
return self
def get_statsobj_copy(self):
"""Return new StatsObj object with same stats as self"""
s = StatsObj()
for attr in self.stat_attrs:
s.set_stat(attr, self.get_stat(attr))
return s
class StatsDeltaProcess(StatsObj):
"""Keep track of statistics during DirDelta process"""
def __init__(self):
"""StatsDeltaProcess initializer - zero file attributes"""
StatsObj.__init__(self)
for attr in StatsObj.stat_file_attrs:
self.__dict__[attr] = 0
self.Errors = 0
self.StartTime = time.time()
def add_new_file(self, path):
"""Add stats of new file path to statistics"""
filesize = path.getsize()
self.SourceFiles += 1
# SourceFileSize is added-to incrementally as read
self.NewFiles += 1
self.NewFileSize += filesize
self.DeltaEntries += 1
def add_changed_file(self, path):
"""Add stats of file that has changed since last backup"""
filesize = path.getsize()
self.SourceFiles += 1
# SourceFileSize is added-to incrementally as read
self.ChangedFiles += 1
self.ChangedFileSize += filesize
self.DeltaEntries += 1
def add_deleted_file(self):
"""Add stats of file no longer in source directory"""
self.DeletedFiles += 1 # can't add size since not available
self.DeltaEntries += 1
def add_unchanged_file(self, path):
"""Add stats of file that hasn't changed since last backup"""
filesize = path.getsize()
self.SourceFiles += 1
self.SourceFileSize += filesize
def close(self):
"""End collection of data, set EndTime"""
self.EndTime = time.time()
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