Channel and connection pooling in RabbitMQ - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a new connection to RabbitMQ.

RabbitMQ

connection = pika.BlockingConnection(pika.ConnectionParameters('[1]'))

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

Aopen

Blocalhost

Cchannel

Dqueue

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'channel' or 'queue' instead of the hostname.

Using 'open' which is not a hostname.

The connection to RabbitMQ is created by specifying the host, usually 'localhost' for local servers.

2fill in blank

medium

Complete the code to open a new channel from the connection.

RabbitMQ

channel = connection.[1]()

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Aopen

Bconnect

Copen_channel

Dchannel

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'connect' which is for connections, not channels.

Using 'open_channel' which is not a valid method.

To open a channel, call the 'channel()' method on the connection object.

3fill in blank

hard

Fix the error in the code to properly close the channel.

RabbitMQ

channel.[1]()

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

Aclose_channel

Bshutdown

Cclose

Ddisconnect

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'close_channel' which is not a method.

Using 'shutdown' or 'disconnect' which are invalid here.

The correct method to close a channel is 'close()'.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps channel IDs to their status if the channel is open.

RabbitMQ

{ch_id: ch.status for ch_id, ch in channels.items() if ch.[1] == [2]

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Astatus

Bopen

Ctrue

Dis_open

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'status' attribute which may not exist.

Comparing to 'closed' instead of 'open'.

Comparing 'is_open' to string 'open' instead of boolean True.

We check if the channel's 'is_open' attribute is True to filter open channels.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps connection names to their channels if the channel is open.

RabbitMQ

{conn_name: ch for conn_name, ch in connections.items() if ch.[1] and ch.[2] == [3]

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

Ais_open

Bstatus

Copen

Dis_closed

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'is_closed' which is the opposite.

Not checking both conditions.

The comprehension filters channels that are open by checking 'is_open' attribute and 'status' equals 'open'.