Is Azure Storage Queues completely pull based?

Question

I see in the doc here. https://learn.microsoft.com/en-us/azure/service-bus-messaging/service-bus-azure-and-service-bus-queues-compared-contrasted

Azure Storage Queues are not push based.

1. Does this mean that the message consumer has to always do polling?
2. How does Azure Functions SDK Storage Queue trigger work? If that also does polling, is there a way to set the polling frequency etc?

Thanks!

Answer 1

Hi @Kamal Rathnayake ,

Thanks for reaching out to Q&A forum.

As mentioned in the documentation, Azure Storage queue is not push based. Clients/consumers will always have to consume the messages by polling the storage queue. Azure Queue storage trigger functions also consume the messages based on polling. You can set the polling frequency by using the "maxPollingInterval" property.

"maxPollingInterval" property is set in host.json file. You can set the frequency by specifying the number of seconds/minutes. There are other properties such as batch size,timeout etc

host.json:

{
"version": "2.0",
"extensions": {
"queues": {
"maxPollingInterval": "00:00:02",
"visibilityTimeout" : "00:00:30",
"batchSize": 16,
"maxDequeueCount": 5,
"newBatchThreshold": 8,
"messageEncoding": "base64"
}
}
}

Reference : https://learn.microsoft.com/en-us/azure/azure-functions/functions-bindings-storage-queue?tabs=in-process%2Cextensionv5%2Cextensionv3&pivots=programming-language-csharp#host-json

I hope this helps! Feel free to reach out to me if you have any queries or concerns.

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