def videoExistsInMemcache(memcache, key):
metadata = memcache.get('%s-metadata' % key)
if metadata == None:
return False
chunkCount = struct.unpack('=L', metadata[:4])[0]
for curChunk in xrange(chunkCount):
if not memcache.touch('%s-%s' % (key, curChunk)):
return False
return True
def videoExistsInMemcache(memcache, key):
metadata = memcache.get('%s-metadata' % key)
if metadata == None:
return False
chunkCount = struct.unpack('=L', metadata[:4])[0]
for curChunk in xrange(chunkCount):
if not memcache.touch('%s-%s' % (key, curChunk)):
return False
return True
while time.time() < startTime + MINIMUM_RUN_PERIOD or memcache.get(
trackerRequiredKey):
cycleStartTime = time.time()
# build stitched manifest
manifest = manifestStitcher.getUpdatedManifest(liveStreamUrl,
adPositionsKey)
# update the last used segment in memcache
if manifestStitcher.lastUsedSegment != None:
# Note: there is a race here between the get & set, but it shouldn't be a problem since trackers
# working on the same entry will more or less synchronized, if they aren't it's a problem anyway...
savedLastUsedSegment = memcache.get(lastUsedSegmentKey)
if savedLastUsedSegment == None or manifestStitcher.lastUsedSegment > int(
savedLastUsedSegment):
writeOutput('setting last used segment to %s' %
manifestStitcher.lastUsedSegment)
memcache.set(lastUsedSegmentKey,
str(manifestStitcher.lastUsedSegment),
RESULT_MANIFEST_EXPIRY)
# save the result to memcache
memcache.set(outputMemcacheKey, manifest, RESULT_MANIFEST_EXPIRY)
memcache.touch(ffmpegParamsKey, RESULT_MANIFEST_EXPIRY)
# sleep until next cycle
curTime = time.time()
sleepTime = cycleStartTime + CYCLE_INTERVAL - curTime
if sleepTime > 0:
time.sleep(sleepTime)
writeOutput('Quitting...')
executeCommand(cmdLine)
# main loop
manifestStitcher = ManifestStitcher()
startTime = time.time()
while time.time() < startTime + MINIMUM_RUN_PERIOD or memcache.get(trackerRequiredKey):
cycleStartTime = time.time()
# build stitched manifest
manifest = manifestStitcher.getUpdatedManifest(liveStreamUrl, adPositionsKey)
# update the last used segment in memcache
if manifestStitcher.lastUsedSegment != None:
# Note: there is a race here between the get & set, but it shouldn't be a problem since trackers
# working on the same entry will more or less synchronized, if they aren't it's a problem anyway...
savedLastUsedSegment = memcache.get(lastUsedSegmentKey)
if savedLastUsedSegment == None or manifestStitcher.lastUsedSegment > int(savedLastUsedSegment):
writeOutput('setting last used segment to %s' % manifestStitcher.lastUsedSegment);
memcache.set(lastUsedSegmentKey, str(manifestStitcher.lastUsedSegment), RESULT_MANIFEST_EXPIRY)
# save the result to memcache
memcache.set(outputMemcacheKey, manifest, RESULT_MANIFEST_EXPIRY)
memcache.touch(ffmpegParamsKey, RESULT_MANIFEST_EXPIRY)
# sleep until next cycle
curTime = time.time()
sleepTime = cycleStartTime + CYCLE_INTERVAL - curTime
if sleepTime > 0:
time.sleep(sleepTime)
writeOutput('Quitting...')
