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41 lines
1.3 KiB
Python
41 lines
1.3 KiB
Python
from datetime import datetime
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import pytz
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from core.data_store import DATA_STORE
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class SIGRefDataProvider:
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"""Generic SIG reference data provider class. Subclasses of this query the individual URLs or files for data."""
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def __init__(self, sig_name, provider_config):
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"""Constructor"""
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self.sig_name = sig_name
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self.enabled = provider_config["enabled"]
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self.last_update_time = datetime.min.replace(tzinfo=pytz.UTC)
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self.last_spot_time = datetime.min.replace(tzinfo=pytz.UTC)
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self.status = "Not Started" if self.enabled else "Disabled"
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# Create an empty dict to store data if one doesn't already exist
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if not sig_name in DATA_STORE.sigrefs:
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DATA_STORE.sigrefs[sig_name] = {}
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def start(self):
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"""Start the provider. This should return immediately after spawning threads to access the remote resources"""
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raise NotImplementedError("Subclasses must implement this method")
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def stop(self):
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"""Stop any threads and prepare for application shutdown"""
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raise NotImplementedError("Subclasses must implement this method")
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def _replace_data(self, new_data):
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"""Replace all data for the named sig with the new data. new_data should be a map of reference ID to SIGRef
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objects."""
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DATA_STORE.sigrefs[self.sig_name] = new_data
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