Publisher confirms in RabbitMQ - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enable publisher confirms on the channel.

RabbitMQ

channel.[1]()

Drag options to blanks, or click blank then click option'

Aconfirm_select

Bset_confirm

Cstart_confirm

Denable_confirm

Attempts:

3 left

💡 Hint

Common Mistakes

Using a method that does not exist like 'start_confirm'.

Trying to enable confirms on the connection instead of the channel.

To enable publisher confirms in RabbitMQ, you call confirm_select() on the channel.

2fill in blank

medium

Complete the code to publish a message and wait for confirmation.

RabbitMQ

channel.basic_publish(exchange='', routing_key='task_queue', body='Hello')
channel.[1]()

Drag options to blanks, or click blank then click option'

Await_for_confirmation

Bwait_for_ack

Cwait_for_confirms

Dwait_for_confirm

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-existent method like 'wait_for_ack'.

Not waiting for confirms after publishing.

After publishing, wait_for_confirms() waits for the broker to confirm the message.

3fill in blank

hard

Fix the error in the code to properly handle publisher confirms.

RabbitMQ

channel.basic_publish(exchange='', routing_key='jobs', body='Run')
if not channel.[1]():
    print('Message not confirmed!')

Drag options to blanks, or click blank then click option'

Await_for_confirms

Bwait_for_confirm

Cwait_for_ack

Dwait_for_confirmation

Attempts:

3 left

💡 Hint

Common Mistakes

Using a method that does not exist or returns nothing.

Assuming the publish method itself returns confirmation.

The correct method to check for confirms is wait_for_confirms(). It returns True if all messages are confirmed.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps message IDs to their confirmation status.

RabbitMQ

confirms = {msg_id: channel.[1](msg_id) for msg_id in message_ids if channel.[2](msg_id)}

Drag options to blanks, or click blank then click option'

Ais_confirmed

Bis_pending

Cis_acknowledged

Dis_rejected

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the methods or using non-existent ones.

Using the same method for both blanks.

The method is_acknowledged checks if a message is confirmed, and is_pending checks if it is still waiting for confirmation.

5fill in blank

hard

Fill all three blanks to create a dictionary of message IDs and their statuses filtered by confirmed messages.

RabbitMQ

confirmed_msgs = {msg_id: status for msg_id, status in statuses.items() if msg_id [1] confirmed_ids and status [2] 'ack' and not status [3] 'nack'}

Drag options to blanks, or click blank then click option'

Ain

B==

C!=

Dnot in

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'not in' instead of 'in' for membership check.

Confusing equality and inequality operators.

The code filters messages where the ID is in the confirmed list, status equals 'ack', and status is not 'nack'.