![]() Var message = new ServiceBusMessage("Half life") When sending three message to a destination queue like the following // Scenario: Expiry ![]() Let’s have a closer look at the three scenarios. Var description = new CreateQueueOptions(destination)Īwait client.CreateQueueAsync(description) var client = new ServiceBusAdministrationClient(connectionString) To enable deadlettering of messages that expired it is required to opt-in for that when creating the queue by specifying DeadLetteringOnMessageExpiration. There are more sub-queues per queue, but we will talk about them at a later point in this article series. The important piece though, is that putting messages to the deadletter queue means they are no longer in the input queue and that is a good thing because they no longer block the receiver from processing other messages in the queue.ĭead letter queues are sub-queues hidden behind a special name called queueName/$DeadLetterQueue. Dead letter queues are dedicated queues that allow messages to be parked there for a period of time until we have a way to deal with those, or we ultimately decide to purge them. The good news is though that Azure Service Bus offers dead lettering capabilities. Where should those messages go? At the end of the day, it is probably a business decision what you want to do with those messages, and the answer might vary depending on the message type or the input queue. The receiver forcefully deadletters a message (Deadletter).The receiver could not successfully handle the message due to processing errors for multiple times (MaxDeliver圜ount).The receiver doesn’t pick up the message before the message’s time to live is expired (Expiry).After all, those queues decouple the sender from the receiver by persisting the business intent messages and allowing them to handle them whenever the receiver has time. If we are using queuing, we certainly don’t want to lose messages. Explains where messages got when certain conditions are met, for more posts in this series go to Contents.
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