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node.py
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node.py
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# -*- coding: utf-8 -*-
from output import Output
from rest import RESTConnection, NotFoundException, UnauthorizedException
from settings import NODE
from time import sleep
import logging
class Node(object):
def run(self):
while True:
try:
printRequest = self.get_print_request()
except NotFoundException:
logging.info("No print request to print. Waiting...")
sleep(NODE['QUERY_TIME'])
continue
except UnauthorizedException:
logging.warning("Node unauthorized. Waiting...")
sleep(NODE['QUERY_TIME'])
continue
with Output.new() as output:
try:
logging.info("Trying to print the request.")
output.printRequest(printRequest)
except Exception as e:
logging.error("There was an error "
"during printing:\n{}".format(e))
self.report_failure(printRequest)
continue
logging.info("Succesfully printed the request.")
self.report_success(printRequest)
logging.info("Waiting for next request.")
sleep(NODE['QUERY_TIME'])
def get_print_request(self):
"""Return a print request for printing."""
return RESTConnection.get_print_request()
def report_success(self, printRequest):
"""Report printing success to the Supervisor."""
return RESTConnection.post_print_request(printRequest['id'],
{'error': False})
def report_failure(self, printRequest):
"""Report printing failure to the Supervisor."""
return RESTConnection.post_print_request(printRequest['id'],
{'error': True})