/
lax_response_adapter.py
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/
lax_response_adapter.py
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import json
from dateutil.parser import parse
import log
from provider import process
from provider import utils
IDENTITY = log.identity("lax_response_adapter")
LOGGER = log.logger("lax_response_adapter.log", "INFO", IDENTITY)
class ShortRetryException(RuntimeError):
pass
class LaxResponseAdapter:
def __init__(self, settings, logger):
self._settings = settings
self.logger = logger
def listen(self, flag):
self.logger.info("started")
client = self._settings.aws_conn('sqs', {
'aws_access_key_id': self._settings.aws_access_key_id,
'aws_secret_access_key': self._settings.aws_secret_access_key,
'region_name': self._settings.sqs_region,
})
input_queue_url_response = client.get_queue_url(
QueueName=self._settings.lax_response_queue
)
input_queue_url = input_queue_url_response.get("QueueUrl")
output_queue_url_response = client.get_queue_url(
QueueName=self._settings.workflow_starter_queue
)
output_queue_url = output_queue_url_response.get("QueueUrl")
if input_queue_url is not None:
while flag.green():
self.logger.debug("reading queue")
queue_messages = client.receive_message(
QueueUrl=input_queue_url,
MaxNumberOfMessages=1,
VisibilityTimeout=60,
WaitTimeSeconds=20,
)
if queue_messages.get("Messages"):
queue_message = queue_messages.get("Messages")[0]
self.logger.info(
"got message id: %s", queue_message.get("MessageId")
)
try:
workflow_starter_message = self.process_message(queue_message)
# send workflow initiation message
self.logger.info(
"sending workflow starter message: %s",
workflow_starter_message,
)
client.send_message(
QueueUrl=output_queue_url,
MessageBody=json.dumps(workflow_starter_message),
)
self.logger.info(
"deleting message id: %s", queue_message.get("MessageId")
)
client.delete_message(
QueueUrl=input_queue_url,
ReceiptHandle=queue_message.get("ReceiptHandle"),
)
except ShortRetryException as exception:
self.logger.info(
"short retry: %s because of %s",
queue_message.get("MessageId"),
exception,
)
client.change_message_visibility(
QueueUrl=input_queue_url,
ReceiptHandle=queue_message.get("ReceiptHandle"),
VisibilityTimeout=10,
)
self.logger.info("graceful shutdown")
else:
self.logger.error("Could not obtain queue, exiting")
def process_message(self, message):
message_str = str(message.get("Body"))
return parse_message(message_str, self.logger)
def parse_token(token):
"parse the token from a lax response message dict"
try:
token_parsed = utils.base64_decode_string(token)
return json.loads(token_parsed)
except:
return {
"run": None,
"version": None,
"expanded_folder": None,
"status": None,
"run_type": None,
}
def parse_message(message, logger):
"parse a lax response message"
try:
logger.info("got the following message from Lax: %s", message)
message_data = json.loads(message)
result = message_data["status"]
date_time = parse(message_data["datetime"])
date_time = date_time.strftime("%Y-%m-%dT%H:%M:%SZ")
article_id = message_data["id"]
operation = message_data["requested-action"]
response_message = None
if "message" in message_data:
response_message = message_data["message"]
token = parse_token(message_data["token"])
run = token["run"]
version = token["version"]
expanded_folder = token["expanded_folder"]
status = token["status"]
force = token["force"]
run_type = token.get("run_type")
workflow_data = {
"run": run,
"article_id": article_id,
"version": version,
"expanded_folder": expanded_folder,
"status": status, # vor/poa
"result": result,
"message": response_message,
"update_date": date_time,
"requested_action": operation,
"force": force,
"run_type": run_type,
}
if operation == "ingest":
if "force" in token and token["force"] is True:
workflow_starter_message = {
"workflow_name": "SilentCorrectionsProcess",
"workflow_data": workflow_data,
}
logger.info("calling workflow SilentCorrectionsProcess")
else:
workflow_starter_message = {
"workflow_name": "ProcessArticleZip",
"workflow_data": workflow_data,
}
logger.info("calling workflow ProcessArticleZip")
else:
workflow_starter_message = {
"workflow_name": "PostPerfectPublication",
"workflow_data": workflow_data,
}
logger.info("calling workflow PostPerfectPublication")
return workflow_starter_message
except Exception as exception:
logger.error("Error parsing Lax message. Message: " + str(exception))
raise
if __name__ == "__main__":
ENV = utils.console_start_env()
SETTINGS = utils.get_settings(ENV)
lax_response_adapter = LaxResponseAdapter(SETTINGS, LOGGER)
process.monitor_interrupt(lambda flag: lax_response_adapter.listen(flag))