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use LoopingCall in SingleProgressManager to simplify it

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This commit is contained in:
Kay Kurokawa 2017-06-20 15:03:17 -04:00
parent f99995a990
commit 1c1b5096be
2 changed files with 18 additions and 30 deletions
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39
lbrynet/core/client/StandaloneBlobDownloader.py
View file

@ -6,10 +6,10 @@ from lbrynet.core.client.BlobRequester import BlobRequester
from lbrynet.core.client.ConnectionManager import ConnectionManager
from lbrynet.core.client.DownloadManager import DownloadManager
from lbrynet.core.Error import InvalidBlobHashError
from lbrynet.core.utils import is_valid_blobhash
from lbrynet.core.utils import is_valid_blobhash, safe_start_looping_call, safe_stop_looping_call
from twisted.python.failure import Failure
from twisted.internet import defer
from twisted.internet import LoopingCall
log = logging.getLogger(__name__)
@ -34,34 +34,24 @@ class SingleBlobMetadataHandler(object):
class SingleProgressManager(object):
def __init__(self, finished_callback, download_manager):
self.finished_callback = finished_callback
self.finished = False
self.download_manager = download_manager
self._next_check_if_finished = None
self.checker = LoopingCall(self._check_if_finished)
def start(self):
from twisted.internet import reactor
assert self._next_check_if_finished is None
self._next_check_if_finished = reactor.callLater(0, self._check_if_finished)
safe_start_looping_call(self.checker,1)
return defer.succeed(True)
def stop(self):
if self._next_check_if_finished is not None:
self._next_check_if_finished.cancel()
self._next_check_if_finished = None
safe_stop_looping_call(self.checker)
return defer.succeed(True)
def _check_if_finished(self):
from twisted.internet import reactor
self._next_check_if_finished = None
if self.finished is False:
if self.stream_position() == 1:
self.blob_downloaded(self.download_manager.blobs[0], 0)
else:
self._next_check_if_finished = reactor.callLater(1, self._check_if_finished)
blob_downloaded = self.download_manager.blobs[0]
log.debug("The blob %s has been downloaded. Calling the finished callback", str(blob_downloaded))
safe_stop_looping_call(self.checker)
self.finished_callback(blob_downloaded)
def stream_position(self):
blobs = self.download_manager.blobs
@ -74,15 +64,6 @@ class SingleProgressManager(object):
assert len(blobs) == 1
return [b for b in blobs.itervalues() if not b.is_validated()]
def blob_downloaded(self, blob, blob_num):
from twisted.internet import reactor
log.debug("The blob %s has been downloaded. Calling the finished callback", str(blob))
if self.finished is False:
self.finished = True
reactor.callLater(0, self.finished_callback, blob)
class DummyBlobHandler(object):
def __init__(self):

7
lbrynet/core/utils.py
View file

@ -49,6 +49,13 @@ def call_later(delay, func, *args, **kwargs):
from twisted.internet import reactor
return reactor.callLater(delay, func, *args, **kwargs)
def safe_start_looping_call(looping_call, interval_sec):
if not looping_call.running:
looping_call.start(interval_sec)
def safe_stop_looping_call(looping_call):
if looping_call.running:
looping_call.stop()
def generate_id(num=None):
h = get_lbry_hash_obj()