100 lines
3.4 KiB
Python
100 lines
3.4 KiB
Python
#!/usr/bin/env python
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"""
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Communicator module
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"""
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import logging
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import requests
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import requests.exceptions
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__author__ = "@tormakris"
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__copyright__ = "Copyright 2020, GoldenPogácsa Team"
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__module_name__ = "messagesender"
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__version__text__ = "1"
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logging.basicConfig(level=logging.INFO)
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LOGGER = logging.getLogger(__name__)
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class Communicator:
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"""
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Class handling low level communication with consumers.
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"""
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def __init__(self, currentconsumer: str, uuid: str):
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"""**Constructor:**
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Initializes the object.
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:param consumerlocator: the current consumer's IP address as a string
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:param uuid: string typed UUID.
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"""
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self.currenctconsumer=currentconsumer
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self.uuid = uuid
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def sendmessage(self, message: str) -> None:
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"""Send message to the current consumer. Logs the process.
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:param message: the message of type string that will be sent.
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:return: None
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"""
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currentconsumer=self.currenctconsumer
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LOGGER.info(f"Sending message to {currentconsumer}")
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try:
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postresponse=requests.post(f'http://{currentconsumer}/log', json={'uuid': self.uuid, 'message': message}, timeout=5)
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LOGGER.debug(f"Message status code is:{postresponse.status_code}")
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except (requests.exceptions.Timeout, requests.exceptions.ConnectionError) as e:
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LOGGER.exception(e) # Fun fact: ez azt jelenti, hogy elveszett az üzenet... ide valami retry kellene inkább más consumerek felé...
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def discoveravailableconsumers(self) -> list:
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"""Get the list of available consumer from the current primary consumer. Logs the received list.
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:return: list of consumers' IP addresses
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"""
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try:
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currentconsumer = self.currenctconsumer
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response = requests.get(f'http://{currentconsumer}/consumers', timeout=5)
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json = response.json()
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LOGGER.info(f"List of currently available consumers: {json}")
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return json
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except Exception as e:
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LOGGER.exception(e)
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return []
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def isconsumeravailable(self) -> bool:
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"""Readiness probe current consumer. Logs the result.
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:return: True if available, False otherwise
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"""
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currentconsumer = self.currenctconsumer
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try:
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response = requests.get(f'http://{currentconsumer}/consumers', timeout=5)
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isavailable = response.status_code == 200
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except Exception as e:
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LOGGER.exception(e)
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isavailable = False
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LOGGER.info(f"Current consumer availability: {isavailable}")
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return isavailable
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def checkconsumer(self, consumer: str) -> bool:
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"""Readiness probe of a particular consumer. Logs the result.
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:param consumer: the consumer's IP address
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:return: True if available, False otherwise
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"""
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try:
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response = requests.get(f'http://{consumer}/consumers', timeout=5)
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isavailable = response.status_code == 200
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except Exception as e:
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LOGGER.exception(e)
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isavailable = False
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LOGGER.info(f"Consumer {consumer} availability: {isavailable}")
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return isavailable
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def set_currentconsumer(self,currenctconsumer) -> None:
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"""Set current consumer
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:param currenctconsumer: the consumer's IP address
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:return: None
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"""
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self.currenctconsumer=currenctconsumer
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