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#!/usr/bin/python
# -*- coding: latin1 -*-
### Copyright (C) 2011 Damon Lynch <damonlynch@gmail.com>
### This program 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.
### This program 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 this program; if not, write to the Free Software
### Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import multiprocessing
import tempfile
import os
import gio
import logging
logger = multiprocessing.get_logger()
import rpdmultiprocessing as rpdmp
import rpdfile
import problemnotification as pn
import config
from gettext import gettext as _
class BackupFiles(multiprocessing.Process):
def __init__(self, path, name,
batch_size_MB, results_pipe, terminate_queue,
run_event):
multiprocessing.Process.__init__(self)
self.results_pipe = results_pipe
self.terminate_queue = terminate_queue
self.batch_size_bytes = batch_size_MB * 1048576 # * 1024 * 1024
self.path = path
self.mount_name = name
self.run_event = run_event
def check_termination_request(self):
"""
Check to see this process has not been requested to immediately terminate
"""
if not self.terminate_queue.empty():
x = self.terminate_queue.get()
# terminate immediately
logger.info("Terminating file backup")
return True
return False
def update_progress(self, amount_downloaded, total):
# first check if process is being terminated
self.amount_downloaded = amount_downloaded
if not self.terminate_queue.empty():
# it is - cancel the current copy
self.cancel_copy.cancel()
else:
if not self.total_reached:
chunk_downloaded = amount_downloaded - self.bytes_downloaded
if (chunk_downloaded > self.batch_size_bytes) or (amount_downloaded == total):
self.bytes_downloaded = amount_downloaded
if amount_downloaded == total:
# this function is called a couple of times when total is reached
self.total_reached = True
self.results_pipe.send((rpdmp.CONN_PARTIAL, (rpdmp.MSG_BYTES, (self.scan_pid, self.pid, self.total_downloaded + amount_downloaded, chunk_downloaded))))
if amount_downloaded == total:
self.bytes_downloaded = 0
def progress_callback(self, amount_downloaded, total):
self.update_progress(amount_downloaded, total)
def run(self):
self.cancel_copy = gio.Cancellable()
self.bytes_downloaded = 0
self.total_downloaded = 0
while True:
self.amount_downloaded = 0
move_succeeded, rpd_file, path_suffix, backup_duplicate_overwrite = self.results_pipe.recv()
if rpd_file is None:
# this is a termination signal
return None
# pause if instructed by the caller
self.run_event.wait()
if self.check_termination_request():
return None
backup_succeeded = False
self.scan_pid = rpd_file.scan_pid
if move_succeeded:
self.total_reached = False
source = gio.File(path=rpd_file.download_full_file_name)
if path_suffix is None:
dest_base_dir = self.path
else:
dest_base_dir = os.path.join(self.path, path_suffix)
dest_dir = os.path.join(dest_base_dir, rpd_file.download_subfolder)
backup_full_file_name = os.path.join(
dest_dir,
rpd_file.download_name)
subfolder = gio.File(path=dest_dir)
if not subfolder.query_exists(cancellable=None):
# create the subfolders on the backup path
try:
subfolder.make_directory_with_parents(cancellable=gio.Cancellable())
except gio.Error, inst:
# There is a tiny chance directory may have been created by
# another process between the time it takes to query and
# the time it takes to create a new directory.
# Ignore such errors.
if inst.code <> gio.ERROR_EXISTS:
logger.error("Failed to create backup subfolder: %s", dest_dir)
logger.error(inst)
rpd_file.add_problem(None, pn.BACKUP_DIRECTORY_CREATION, self.mount_name)
rpd_file.add_extra_detail('%s%s' % (pn.BACKUP_DIRECTORY_CREATION, self.mount_name), inst)
rpd_file.error_title = _('Backing up error')
rpd_file.error_msg = \
_("Destination directory could not be created: %(directory)s\n") % \
{'directory': subfolder, } + \
_("Source: %(source)s\nDestination: %(destination)s") % \
{'source': rpd_file.download_full_file_name,
'destination': backup_full_file_name} + "\n" + \
_("Error: %(inst)s") % {'inst': inst}
dest = gio.File(path=backup_full_file_name)
if backup_duplicate_overwrite:
flags = gio.FILE_COPY_OVERWRITE
else:
flags = gio.FILE_COPY_NONE
try:
source.copy(dest, self.progress_callback, flags,
cancellable=self.cancel_copy)
backup_succeeded = True
except gio.Error, inst:
fileNotBackedUpMessageDisplayed = True
rpd_file.add_problem(None, pn.BACKUP_ERROR, self.mount_name)
rpd_file.add_extra_detail('%s%s' % (pn.BACKUP_ERROR, self.mount_name), inst)
rpd_file.error_title = _('Backing up error')
rpd_file.error_msg = \
_("Source: %(source)s\nDestination: %(destination)s") % \
{'source': rpd_file.download_full_file_name, 'destination': backup_full_file_name} + "\n" + \
_("Error: %(inst)s") % {'inst': inst}
logger.error("%s:\n%s", rpd_file.error_title, rpd_file.error_msg)
if not backup_succeeded:
if rpd_file.status == config.STATUS_DOWNLOAD_FAILED:
rpd_file.status = config.STATUS_DOWNLOAD_AND_BACKUP_FAILED
else:
rpd_file.status = config.STATUS_BACKUP_PROBLEM
self.total_downloaded += rpd_file.size
bytes_not_downloaded = rpd_file.size - self.amount_downloaded
if bytes_not_downloaded:
self.results_pipe.send((rpdmp.CONN_PARTIAL, (rpdmp.MSG_BYTES, (self.scan_pid, self.pid, self.total_downloaded, bytes_not_downloaded))))
self.results_pipe.send((rpdmp.CONN_PARTIAL, (rpdmp.MSG_FILE,
(backup_succeeded, rpd_file))))
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