def multi_download(self):
"""
This performs the multipart download. It assigns ranges to get from
s3 of particular object to a task.It creates a queue ``part_queue``
which is directly responsible with controlling the progress of the
multipart download. It then creates ``DownloadPartTasks`` for
threads to run via the ``executer``. This fucntion waits
for all of the parts in the multipart download to finish, and then
the last modification time is changed to the last modified time
of the s3 object. This method waits on its parts to finish.
So, threads are required to process the parts for this function
to complete.
"""
part_queue = NoBlockQueue(self.interrupt)
dest_queue = NoBlockQueue(self.interrupt)
part_counter = MultiCounter()
write_lock = threading.Lock()
counter_lock = threading.Lock()
d = os.path.dirname(self.dest)
try:
if not os.path.exists(d):
os.makedirs(d)
except Exception:
pass
size_uploads = self.chunksize
num_uploads = int(self.size / size_uploads)
with open(self.dest, 'wb') as f:
for i in range(num_uploads):
part = (self, i, size_uploads)
part_queue.put(part)
task = DownloadPartTask(session=self.session,
executer=self.executer,
part_queue=part_queue,
dest_queue=dest_queue,
f=f,
region=self.region,
printQueue=self.printQueue,
write_lock=write_lock,
part_counter=part_counter,
counter_lock=counter_lock)
self.executer.submit(task)
part_queue.join()
# The following ensures that if the multipart download is
# in progress, all part uploads finish before releasing the
# the file handle. This really only applies when an interrupt
# signal is sent because the ``part_queue.join()`` ensures this
# if the process is not interrupted.
while part_counter.count:
time.sleep(0.1)
part_list = []
while not dest_queue.empty():
part = dest_queue.get()
part_list.append(part)
if len(part_list) != num_uploads:
raise Exception()
last_update_tuple = self.last_update.timetuple()
mod_timestamp = time.mktime(last_update_tuple)
os.utime(self.dest, (int(mod_timestamp), int(mod_timestamp)))
def multi_download(self):
"""
This performs the multipart download. It assigns ranges to get from
s3 of particular object to a task.It creates a queue ``part_queue``
which is directly responsible with controlling the progress of the
multipart download. It then creates ``DownloadPartTasks`` for
threads to run via the ``executer``. This fucntion waits
for all of the parts in the multipart download to finish, and then
the last modification time is changed to the last modified time
of the s3 object. This method waits on its parts to finish.
So, threads are required to process the parts for this function
to complete.
"""
part_queue = NoBlockQueue(self.interrupt)
dest_queue = NoBlockQueue(self.interrupt)
part_counter = MultiCounter()
write_lock = threading.Lock()
counter_lock = threading.Lock()
d = os.path.dirname(self.dest)
try:
if not os.path.exists(d):
os.makedirs(d)
except Exception:
pass
size_uploads = self.chunksize
num_uploads = int(self.size/size_uploads)
with open(self.dest, 'wb') as f:
for i in range(num_uploads):
part = (self, i, size_uploads)
part_queue.put(part)
task = DownloadPartTask(session=self.session,
executer=self.executer,
part_queue=part_queue,
dest_queue=dest_queue,
f=f, region=self.region,
printQueue=self.printQueue,
write_lock=write_lock,
part_counter=part_counter,
counter_lock=counter_lock)
self.executer.submit(task)
part_queue.join()
# The following ensures that if the multipart download is
# in progress, all part uploads finish before releasing the
# the file handle. This really only applies when an interrupt
# signal is sent because the ``part_queue.join()`` ensures this
# if the process is not interrupted.
while part_counter.count:
time.sleep(0.1)
part_list = []
while not dest_queue.empty():
part = dest_queue.get()
part_list.append(part)
if len(part_list) != num_uploads:
raise Exception()
last_update_tuple = self.last_update.timetuple()
mod_timestamp = time.mktime(last_update_tuple)
os.utime(self.dest, (int(mod_timestamp), int(mod_timestamp)))
