65 lines
2.2 KiB
Python
65 lines
2.2 KiB
Python
import json
|
|
|
|
import django.db
|
|
import django.db.utils
|
|
import pika
|
|
import psycopg2
|
|
from django.core.management import BaseCommand
|
|
from pika.adapters.utils.connection_workflow import AMQPConnectorException
|
|
|
|
from Sprint import settings
|
|
|
|
|
|
def send_to_queue(queue_name, payload):
|
|
with pika.BlockingConnection(
|
|
pika.ConnectionParameters(
|
|
host=settings.RABBIT_HOST,
|
|
port=settings.RABBIT_PORT,
|
|
credentials=pika.PlainCredentials('guest', settings.RABBIT_PASSWORD)
|
|
)
|
|
) as connection:
|
|
channel = connection.channel()
|
|
channel.queue_declare(queue=queue_name)
|
|
channel.basic_publish(
|
|
exchange="",
|
|
routing_key=queue_name,
|
|
body=json.dumps(payload).encode('utf-8'),
|
|
)
|
|
|
|
|
|
class MessagingSupport(BaseCommand):
|
|
queue_name = None
|
|
|
|
def process(self, payload: dict):
|
|
raise NotImplementedError
|
|
|
|
def consume(self, ch, method, properties, body):
|
|
data = json.loads(body.decode('utf-8'))
|
|
print(f"Got {data}, processing...")
|
|
try:
|
|
self.process(data)
|
|
print("Process finished successfully")
|
|
except (psycopg2.OperationalError, django.db.OperationalError, django.db.utils.OperationalError):
|
|
print("Failed to connect to database, restarting...")
|
|
send_to_queue(self.queue_name, data)
|
|
raise
|
|
|
|
def handle(self, *args, **options):
|
|
if self.queue_name is None:
|
|
raise NotImplementedError("Queue name must be declared")
|
|
print("start listening " + self.queue_name)
|
|
while True:
|
|
try:
|
|
with pika.BlockingConnection(
|
|
pika.ConnectionParameters(
|
|
host=settings.RABBIT_HOST,
|
|
credentials=pika.PlainCredentials('guest', settings.RABBIT_PASSWORD)
|
|
)
|
|
) as connection:
|
|
channel = connection.channel()
|
|
channel.queue_declare(queue=self.queue_name)
|
|
channel.basic_consume(queue=self.queue_name, on_message_callback=self.consume, auto_ack=True)
|
|
channel.start_consuming()
|
|
except AMQPConnectorException:
|
|
print("connection to rabbit failed: reconnecting")
|