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Version 1516.5 0 introduces the new queue type (D)elay. Delay processing is a workflow where specific messages being dequeued cannot yet be processed, and should be retried later. However, other messages within the queue can be processed and should not be blocked.

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public override async Task ProcessMessageAsync(IMessageContext context, CancellationToken token)
{
   // attempt to send message to a service
   var response = await service.Submit(context.message);
   
   if(response.NotReadyTryAgainLater)  // service indicates the message cannot be processed yet
     // Call the ReprocessMessage method passing in a timespan for when we should retry
     context.ReprocessMessage(TimeSpan.FromMinutes(5));
} 	

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• ‘#Reprocess’ - the reprocess counter displays the number of times a message has been put into the delayed state.

• ‘Reprocess Date/Time’ - the date/time when the message will be revert reverted back to a queued state.

You can also use the queue type drop-down within the queue to filter for delayed messages.

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