33 lines
1.0 KiB
Python
33 lines
1.0 KiB
Python
# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
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# All Rights Reserved. See LICENSE file for details.
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from abc import ABC
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from tfw.networking import Scope
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from tfw.crypto import message_checksum
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from .event_handler_base import EventHandlerBase
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class BroadcastingEventHandler(EventHandlerBase, ABC):
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# pylint: disable=abstract-method
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"""
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Abstract base class for EventHandlers which broadcast responses
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and intelligently ignore their own broadcasted messages they receive.
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"""
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def __init__(self, key):
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super().__init__(key)
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self.own_message_hashes = []
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def event_handler_callback(self, message):
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message_hash = message_checksum(message)
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if message_hash in self.own_message_hashes:
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self.own_message_hashes.remove(message_hash)
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return
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response = self.dispatch_handling(message)
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if response:
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self.own_message_hashes.append(message_checksum(response))
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self.server_connector.send_message(response, Scope.BROADCAST)
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