azure functions queue trigger configurations

Question

I am trying to find the right place to set a batch size for my queue trigger. Basically all these properties.. "batchSize": 1, "maxDequeueCount": 2, "maxPollingInterval": 5000,

When I checked this article, https://learn.microsoft.com/en-us/azure/azure-functions/functions-host-json

It does not talk about setting up configurations for queue triggers in host.json.

I have the following trigger which I only need fired one at a time, so batch size 1.

The name of the queue is saved in my local.settings.json in variable called "DispatchQueueName"

public static void OnFieldDevicePollingRequest_Run([QueueTrigger("%DispatchQueueName%", Connection = "AVStorageAccessKey")]string myQueueItem, ILogger log)
        {
            log.LogInformation($"Start Queue trigger function processed: {myQueueItem}");
            log.LogInformation($"C# Queue trigger function processed: {myQueueItem}");
        }

I am using .net core and need help with this soon please.

The host.json metadata file contains global configuration options that affect all functions for a function app.Other function app configuration options are managed in your app settings. — Joey Cai
– Joey Cai, Commented Jun 13, 2019 at 2:32

Joey Cai · Accepted Answer · 2019-06-13 02:37:11Z

3

It does not talk about setting up configurations for queue triggers in host.json.

You could set below configuration in host.json.

{
    "version": "2.0",
    "extensions": {
        "queues": {
            "maxPollingInterval": "00:00:02",
            "batchSize": 1,
            "maxDequeueCount": 2
        }
    }
}

The output is as below:

For more details, you could refer to this article.

answered Jun 13, 2019 at 2:37

Joey Cai

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4 Comments

Sarah Over a year ago

Thank you so very much @Joey, I have two another question.. 1) How can I specify the name of the queue in extensions. What if I have two functions monitoring two different queues and I want different specs for each?

Katy Shimizu Over a year ago

1) Queue names are configured at the function level, in attributes (.NET) or function.json (everything else.) 2) Polling/batch/retry configuration is managed at the function app level, so you would need to move your queue triggered functions into separate function apps to configure different values.

Joey Cai Over a year ago

As the comment I post before, the host.json metadata file contains global configuration options that affect all functions for a function app. So you could not specify for different queues.

FabianVal Over a year ago

I think the description of settings got moved here learn.microsoft.com/en-us/azure/azure-functions/….

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