def _get_blip(self, key=None, value=None):
logging.debug('getting blip: %s %s %s'
% (self.storage_root,key,len(value or '')))
blip = Blip(self.storage_root,key=key)
if value is not None:
blip.set_value(value)
return blip
def get_thumbnail(storage_root,full_url,size,timeout=None,farm_work=False):
from diskdb import SimpleBlip as Blip
import urlparse
import memcache
# we are going to use memcache as a shared cache
# and the drive as a local cache
mc = memcache.Client(['memcached.mypubliccode.com:11211'])
size = str(size) # we need a string
parsed = urlparse.urlparse(full_url) # break up our url to strip args
url = '%s://%s%s' % (parsed.scheme,parsed.netloc,parsed.path) # recreate
key = get_key(url,size) # get the key for this file's storage
print 'key: %s' % key
# check and see if we have the thumbnail already
thumbnail = Blip(storage_root,key)
thumbnail_data = thumbnail.get_value()
if not thumbnail_data:
thumbnail_data = mc.get(key)
if thumbnail_data:
print 'got from mc'
# if we don't have the thumbnail check and see if
# we have the original
if not thumbnail_data:
print 'no thumbnail data'
original = Blip(storage_root,get_key(url))
original_data = original.get_value()
if not original_data:
original_data = mc.get(get_key(url))
if original_data:
print 'got from mc'
# if we don't have the original send off a task to
# download it
if not thumbnail_data and not original_data:
print 'no original data'
original_data = download_resource(url,farm=True if farm_work else False)
original.set_value(original_data)
original.flush()
mc.set(get_key(url),original_data)
if not thumbnail_data:
print 'creating thumbnail'
# now that we've downloaded it we need to get it resized
thumbnail_data = thumbnail_image(size,original_data,
farm=True if farm_work else False)
thumbnail.set_value(thumbnail_data)
thumbnail.flush()
mc.set(key,thumbnail_data)
return thumbnail_data
