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add: send mysql_to_rabbitmq.py #547

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70 changes: 70 additions & 0 deletions examples/mysql_to_rabbitmq.py
Original file line number Diff line number Diff line change
@@ -0,0 +1,70 @@
#!/usr/bin/env python

#
# Update a RabbitMQ when an event is triggered
# in MySQL replication log
#

import json
import pika

from pika import DeliveryMode
from pymysqlreplication import BinLogStreamReader
from pymysqlreplication.row_event import (
DeleteRowsEvent,
UpdateRowsEvent,
WriteRowsEvent,
)

MYSQL_SETTINGS = {"host": "127.0.0.1", "port": 3306, "user": "root",
"passwd": "password"}

def main():
stream = BinLogStreamReader(
connection_settings=MYSQL_SETTINGS,
server_id=3,
only_events=[DeleteRowsEvent, WriteRowsEvent, UpdateRowsEvent],
)

credentials = pika.PlainCredentials(
username='username',
password='password'
)
params = pika.ConnectionParameters('rabbitmq_host', credentials=credentials)

# RabbitMQ Connection Settings
conn = pika.BlockingConnection(params)
channel = conn.channel()
channel.queue_declare(queue='order')
channel.exchange_declare(durable=True, exchange_type='direct', exchange='direct')
channel.queue_bind(queue='order', exchange='direct', routing_key='order')

for binlogevent in stream:
for row in binlogevent.rows:
if isinstance(binlogevent, DeleteRowsEvent):
routing_key = "order"
message_body = row["values"].items()

elif isinstance(binlogevent, UpdateRowsEvent):
routing_key = "order"
message_body = row["after_values"].items()

elif isinstance(binlogevent, WriteRowsEvent):
routing_key = "order"
message_body = row["values"].items()
Comment on lines +42 to +54
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better use routing_key just once.
and I think routing_key == order is little bit Doesn't fit.


properties = pika.BasicProperties(content_type='application/json',
delivery_mode=DeliveryMode.Transient)
channel.basic_publish(
exchange='direct',
routing_key=routing_key,
body=json.dumps(message_body, default=lambda x: str(x)),
properties=properties
)

stream.close()
conn.close()


if __name__ == '__main__':
main()