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Difficulty: MediumImplement Azure Service Bus Solutions

You are developing a C# console application that processes FIFO (first-in, first-out) messages from a session-enabled Azure Service Bus queue. The application must guarantee that messages in a session are processed in order and that the session lock is released only after all processing is complete.

Arrange the steps in the correct order to implement this message processing workflow using the Azure.Messaging.ServiceBus SDK.

  1. 1Instantiate a ServiceBusClient using the namespace connection string.
  2. 2Call AcceptNextSessionAsync on the ServiceBusClient to obtain a ServiceBusSessionReceiver.
  3. 3Call ReceiveMessageAsync on the session receiver to retrieve a message.
  4. 4Process the business logic using the retrieved message's body.
  5. 5Call CompleteMessageAsync on the session receiver for the processed message.
  6. 6Call CloseAsync on the session receiver to release the session lock.

Answer

The correct sequence begins by instantiating a ServiceBusClient, followed by calling AcceptNextSessionAsync on it to obtain a session receiver. Next, call ReceiveMessageAsync on the receiver, process the message payload, call CompleteMessageAsync to remove the message, and finally call CloseAsync to release the session lock.
To process session-enabled messages in FIFO order, the application must first establish a connection using the ServiceBusClient, then call AcceptNextSessionAsync to lock the session and obtain a receiver. Once the receiver is obtained, it can fetch a message with ReceiveMessageAsync, process it, complete the message with CompleteMessageAsync, and finally close the receiver using CloseAsync to release the session lock.

Step-by-Step Solution

1
Create a ServiceBusClient instance.
An initialized ServiceBusClient object is ready to communicate with Azure Service Bus.
The client is the entry point for all SDK operations.
2
Call AcceptNextSessionAsync on the ServiceBusClient.
A ServiceBusSessionReceiver is created, locking the next available session.
Session processing requires locking the session to ensure ordered, exclusive delivery.
3
Call ReceiveMessageAsync on the receiver.
A ServiceBusReceivedMessage is fetched from the queue.
Retrieves the message payload within the scope of the locked session.
4
Execute the application business logic on the message.
The data is processed successfully by the system.
Processing must happen before completion to maintain PeekLock safety.
5
Call CompleteMessageAsync on the receiver.
The message is permanently deleted from the Service Bus queue.
Confirms successful processing and prevents reprocessing.
6
Call CloseAsync on the session receiver.
The receiver is closed and the session lock is released.
Enables other processing instances to lock and process the session.

Key Concept

Session-based message processing and locking lifecycle using the Azure Service Bus SDK
Estimated Time:1m 30s
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Topics

Implement Azure Service Bus Solutions