def create_subscription(self, event_type: str, date_time: Union[str, datetime] = None):
"""
Method creates certain event type subscription and returns Subscription class
Parameters
----------
event_type: str
One of possible event types: 'Trade', 'Quote', 'Summary', 'Profile', 'Order', 'TimeAndSale', 'Candle',
'TradeETH', 'SpreadOrder', 'Greeks', 'TheoPrice', 'Underlying', 'Series', 'Configuration' or ''
date_time: str or datetime.datetime
If present timed subscription will be created (conflated stream). For sting date format is following:
%Y-%m-%d %H:%M:%S.%f. If None - stream subscription will be created. Default - None.
Note
----
Some event types (e.g. Candle) support only timed subscription.
Returns
-------
subscription: Subscription
Subscription class related to current connection
"""
con_status = dxp.dxf_get_current_connection_status(self.__connection, return_str=False)
if con_status == 0 or con_status == 2:
raise ValueError('Connection is not established')
subscription = Subscription(connection=self.__connection,
event_type=event_type,
date_time=date_time)
return subscription
def connect(self, reconnect: bool = True):
"""
Creates connection. If connection status differs from "Not connected" and `reconnect` is False, does nothing
Parameters
----------
reconnect: bool
When True closes previous connection. Default - True
Returns
-------
self: Endpoint
"""
if reconnect:
dxp.dxf_close_connection(self.__connection)
con_status = dxp.dxf_get_current_connection_status(self.__connection, return_str=True)
if con_status == 'Not connected':
self.__connection = dxp.dxf_create_connection(self.address)
return self
def connection_status(self):
return dxp.dxf_get_current_connection_status(self.__connection, return_str=True)
def test_connection_status(connection):
exp_status = 'Connected'
act_status = dxc.dxf_get_current_connection_status(connection)
assert exp_status == act_status
