class Sync(object):
def __init__(self, regions):
"""init object"""
self.glancesync = GlanceSync()
self.glancesync.init_logs()
if not regions:
regions_unsorted = self.glancesync.get_regions()
regions = list()
for region in self.glancesync.preferable_order:
if region in regions_unsorted:
regions.append(region)
regions_unsorted.remove(region)
regions.extend(regions_unsorted)
self.regions = regions
def report_status(self):
"""Report the synchronisation status of the regions"""
for region in self.regions:
try:
stream = StringIO.StringIO()
self.glancesync.export_sync_region_status(region, stream)
print stream.getvalue()
except Exception:
# Don't do anything. Message has been already printed
# try next region
continue
def parallel_sync(self):
"""Run the synchronisation in several regions in parallel. The
synchronisation inside the region is sequential (i.e. several
regions are synchronised simultaneously, but only one image at time
is uploaded for each region)"""
max_children = self.glancesync.max_children
now = datetime.datetime.now()
datestr = str(now.year) + str(now.month).zfill(2) + \
str(now.day).zfill(2) + '_' + str(now.hour).zfill(2) +\
str(now.minute).zfill(2)
print '======Master (' + self.glancesync.master_region + ')'
self.glancesync.print_images_master_region()
sys.stdout.flush()
os.mkdir('sync_' + datestr)
children = dict()
for region in self.regions:
try:
if len(children) >= max_children:
self._wait_child(children)
pid = os.fork()
if pid > 0:
children[pid] = region
continue
else:
path = os.path.join('sync_' + datestr, region + '.txt')
handler = logging.FileHandler(path)
handler.setFormatter(logging.Formatter(
'%(levelname)s:%(message)s'))
logger = self.glancesync.log
# Remove old handlers
for h in logger.handlers:
handler.setFormatter(logging.Formatter('%(message)s'))
logger.removeHandler(h)
logger.addHandler(handler)
logger.setLevel(logging.INFO)
logger.propagate = 0
self.glancesync.sync_region(region)
sys.exit(0)
except Exception:
raise
sys.stderr.flush()
sys.exit(-1)
while len(children) > 0:
self._wait_child(children)
print 'All is done.'
def sequential_sync(self, dry_run=False):
"""Run the synchronisation sequentially (that is, do not start the
synchronisation to a region before the previous one was completed or
failed
:param dry_run: if true, do not synchronise images actually
"""
print '======Master (' + self.glancesync.master_region + ')'
self.glancesync.print_images_master_region()
for region in self.regions:
try:
print "======" + region
sys.stdout.flush()
self.glancesync.sync_region(region, dry_run=dry_run)
except Exception:
# Don't do anything. Message has been already printed
# try next region
continue
def _wait_child(self, children):
""" Wait until one of the regions ends its synchronisation and then
print the result
:param children:
:return: a dictionary or regions, indexed by the pid of the process
"""
finish_direct_child = False
while not finish_direct_child:
(pid, status) = os.wait()
if pid not in children:
continue
else:
finish_direct_child = True
if status == 0:
print 'Region {0} finish'.format(children[pid])
else:
print 'Region {0} finish with errors'.format(children[pid])
del children[pid]
sys.stdout.flush()