def redis_available(min_version):
client = redis.StrictRedis()
try:
client.ping()
except Exception:
return False
else:
ok, redis_version = redis_utils.is_server_new_enough(client,
min_version)
return ok
def redis_available(min_version):
client = redis.StrictRedis()
try:
client.ping()
except Exception:
return False
else:
ok, redis_version = redis_utils.is_server_new_enough(client,
min_version)
return ok
def connect(self):
self.close()
if self._owns_client:
self._client = self._make_client(self._conf)
with _translate_failures():
# The client maintains a connection pool, so do a ping and
# if that works then assume the connection works, which may or
# may not be continuously maintained (if the server dies
# at a later time, we will become aware of that when the next
# op occurs).
self._client.ping()
is_new_enough, redis_version = ru.is_server_new_enough(
self._client, self.MIN_REDIS_VERSION)
if not is_new_enough:
wanted_version = ".".join([str(p)
for p in self.MIN_REDIS_VERSION])
if redis_version:
raise exc.JobFailure("Redis version %s or greater is"
" required (version %s is to"
" old)" % (wanted_version,
redis_version))
else:
raise exc.JobFailure("Redis version %s or greater is"
" required" % (wanted_version))
else:
self._redis_version = redis_version
script_params = {
# Status field values.
'ok': self.SCRIPT_STATUS_OK,
'error': self.SCRIPT_STATUS_ERROR,
# Known error reasons (when status field is error).
'not_expected_owner': self.SCRIPT_NOT_EXPECTED_OWNER,
'unknown_owner': self.SCRIPT_UNKNOWN_OWNER,
'unknown_job': self.SCRIPT_UNKNOWN_JOB,
'already_claimed': self.SCRIPT_ALREADY_CLAIMED,
}
prepared_scripts = {}
for n, raw_script_tpl in six.iteritems(self.SCRIPT_TEMPLATES):
script_tpl = string.Template(raw_script_tpl)
script_blob = script_tpl.substitute(**script_params)
script = self._client.register_script(script_blob)
prepared_scripts[n] = script
self._scripts.update(prepared_scripts)
self._closed = False
