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117 lines
3.4 KiB
Python
117 lines
3.4 KiB
Python
# coding: utf-8
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"""
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Base Class for AIL Modules
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"""
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##################################
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# Import External packages
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##################################
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from abc import ABC, abstractmethod
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import time
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##################################
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# Import Project packages
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##################################
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from pubsublogger import publisher
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from Helper import Process
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class AbstractModule(ABC):
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"""
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Abstract Module class
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"""
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def __init__(self, module_name=None, queue_name=None, logger_channel='Script'):
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"""
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Init Module
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module_name: str; set the module name if different from the instance ClassName
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queue_name: str; set the queue name if different from the instance ClassName
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logger_channel: str; set the logger channel name, 'Script' by default
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"""
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# Module name if provided else instance className
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self.module_name = module_name if module_name else self._module_name()
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# Module name if provided else instance className
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self.queue_name = queue_name if queue_name else self._module_name()
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# Init Redis Logger
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self.redis_logger = publisher
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# Port of the redis instance used by pubsublogger
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self.redis_logger.port = 6380
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# Channel name to publish logs
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# # TODO: refactor logging
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# If provided could be a namespaced channel like script:<ModuleName>
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self.redis_logger.channel = logger_channel
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# Run module endlessly
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self.proceed = True
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# Waiting time in secondes between two proccessed messages
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self.pending_seconds = 10
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# Setup the I/O queues
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self.process = Process(self.queue_name)
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def get_message(self):
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"""
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Get message from the Redis Queue (QueueIn)
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Input message can change between modules
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ex: '<item id>'
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"""
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return self.process.get_from_set()
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def send_message_to_queue(self, message, queue_name=None):
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"""
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Send message to queue
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:param message: message to send in queue
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:param queue_name: queue or module name
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ex: send_to_queue(item_id, 'Global')
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"""
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self.process.populate_set_out(message, queue_name)
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def run(self):
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"""
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Run Module endless process
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"""
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# Endless loop processing messages from the input queue
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while self.proceed:
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# Get one message (ex:item id) from the Redis Queue (QueueIn)
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message = self.get_message()
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if message:
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try:
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# Module processing with the message from the queue
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self.compute(message)
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except Exception as err:
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self.redis_logger.critical(f"Error in module {self.module_name}: {err}")
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else:
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self.computeNone()
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# Wait before next process
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self.redis_logger.debug(f"{self.module_name}, waiting for new message, Idling {self.pending_seconds}s")
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time.sleep(self.pending_seconds)
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def _module_name(self):
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"""
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Returns the instance class name (ie. the Module Name)
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"""
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return self.__class__.__name__
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@abstractmethod
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def compute(self, message):
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"""
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Main method of the Module to implement
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"""
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pass
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def computeNone(self):
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"""
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Method of the Module when there is no message
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"""
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pass
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