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Ensuring message delivery with the mandatory flag
=================================================
The following example demonstrates how to check if a message is delivered by setting the mandatory flag and handling exceptions when using the BlockingConnection::
import pika
import pika.exceptions
# Open a connection to RabbitMQ on localhost using all default parameters
connection = pika.BlockingConnection()
# Open the channel
channel = connection.channel()
# Declare the queue
channel.queue_declare(queue="test", durable=True, exclusive=False, auto_delete=False)
# Enabled delivery confirmations. This is REQUIRED.
channel.confirm_delivery()
# Send a message
try:
channel.basic_publish(exchange='test',
routing_key='test',
body='Hello World!',
properties=pika.BasicProperties(content_type='text/plain',
delivery_mode=pika.DeliveryMode.Transient),
mandatory=True)
print('Message was published')
except pika.exceptions.UnroutableError:
print('Message was returned')
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