def __init__(self, queue_name, message_lifetime=300, logger=None):
access_key = config.get("worker", "aws_access_key")
secret_key = config.get("worker", "aws_secret_key")
self.sqs = SQSConnection(access_key, secret_key)
self.queue = self.sqs.create_queue(queue_name, message_lifetime)
self.queue.set_message_class(JSONMessage)
self.logger = logger
def fetch(key, logger=None):
"""download and extract an archive"""
template = "$AICHALLENGE_PREFIX/var/lib/aichallenge/submissions/%s"
path = os.path.expandvars(template % key)
if os.path.isdir(path):
# already decompressed -- move on
return
if logger is not None:
logger.info('downloading ' + key)
access_key = config.get('worker', 'aws_access_key')
secret_key = config.get('worker', 'aws_secret_key')
bucket = config.get('worker', 'submission_bucket')
prefix = config.get('worker', 'submission_prefix')
s3 = boto.s3.Connection(access_key, secret_key)
bucket = s3.get_bucket(bucket)
s3_key = bucket.get_key(prefix + key)
if s3_key is None:
raise KeyError
io = cStringIO.StringIO()
s3_key.get_contents_to_file(io)
try:
io.seek(0)
zip = zipfile.ZipFile(io)
decompress_zip(zip, path)
return
except zipfile.BadZipfile:
pass
try:
io.seek(0)
tar = tarfile.open(fileobj=io)
decompress_tar(tar, path)
return
except tarfile.TarError:
pass
raise ValueError, "invalid archive"
def run_game(self, body):
"""run a game based on the parameters of a queue message body"""
# fetch players from storage if necessary
for team in body['teams']:
for player in team:
worker.storage.fetch(player['submission_hash'], logger=self.logger)
# run the game and log the result
current_game = config.get('worker', 'current_game')
game_class = worker.games.get_game(current_game)
game = game_class(body['teams'])
result = game.run()
game.stop()
self.logger.info('result: ' + repr(result))
self.result_queue.put(result)
def run_game(self, body):
"""run a game based on the parameters of a queue message body"""
# fetch players from storage if necessary
teams = self.fetch_and_compile_teams(body['teams'])
# run the game and log the result
current_game = config.get('worker', 'current_game')
game_class = worker.games.get_game(current_game)
game = game_class(body, teams)
try:
result = game.run()
self.logger.info('result: ' + repr(result))
self.result_queue.put(result)
return True
except:
return False
finally:
# Ensure that runner resources are freed
game.stop()