Hi Expert, What is the best way to make scheduler or cron job in Azure services. We have one Azure logic APP service and this service needs to be invoked by multiple scheduler for each different Country along with some other combination like channel , product etc. So, there needs around 15 scheduler for different time frequency to call final logic APP api. What is the best way to achieve this ? Thanks!

@Baharul Islam Thanks for reaching out. Your CORN can only have one expression. So you need to create multiple logic apps/function app (15 different logic apps) with different CORN expressions as per your requirements. Within each logic app, you will be calling your main logic app (HTTP trigger or as per your need) and passing different values for the different scenarios from the calling logic app as per your requirement. In case if you are using the function app then you can create a single cron expression that represents the biggest common denominator among all the 15 different times and make the function intelligent enough to decide if it should skip or serve the trigger with what values. I will not suggest this approach as it may be triggering your function app in a scenario where you don't want to do anything and may take more effort to create the logic and cost more than the individual function/logic app if the time of execution is different for all the CORN expressions.

Complex scheduler in Azure

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MayankBargali-MSFT 70,731 Reputation points

2022-04-01T11:23:15.417+00:00

@Baharul Islam Thanks for reaching out. Your CORN can only have one expression. So you need to create multiple logic apps/function app (15 different logic apps) with different CORN expressions as per your requirements. Within each logic app, you will be calling your main logic app (HTTP trigger or as per your need) and passing different values for the different scenarios from the calling logic app as per your requirement.

In case if you are using the function app then you can create a single cron expression that represents the biggest common denominator among all the 15 different times and make the function intelligent enough to decide if it should skip or serve the trigger with what values. I will not suggest this approach as it may be triggering your function app in a scenario where you don't want to do anything and may take more effort to create the logic and cost more than the individual function/logic app if the time of execution is different for all the CORN expressions.
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Baharul Islam 216 Reputation points

2022-04-01T11:45:49.013+00:00

Thanks @MayankBargali-MSFT for your comment. So, best available option is to create multiple logic each for each entry point (scheduler ) but my concern is this can grow to many many logic app.

MayankBargali-MSFT 70,731 Reputation points

2022-04-01T12:00:15.517+00:00

@Baharul Islam Thanks for your response. Yes, creating multiple logic app is the option but alternative, if you want you need to write, your own custom logic and deploy to handle this scenario as there is no out-of-box solution. One alternative that I have shared previously is using the timer trigger with the single cron expression and your function intelligent code will be deciding whether to call your main logic app with what parameters. Similarly, you can deploy your custom code to handle this in any of the Azure services like web apps, azure VM, etc.

MayankBargali-MSFT 70,731 Reputation points

2022-04-01T12:15:02.03+00:00

@Baharul Islam A custom logic, I can think about creating the timer trigger function that runs once every day and has your custom logic that checks what is the different time in UTC you need to call your main logic app. Once you have the data you can now leverage the service bus and send the message with the scheduled time in UTC along with custom details you need at the logic app end. The message will only become visible for your client application at the scheduled time. Now your main logic app will be service bus triggered that will be triggered when the message is available and your message body will have the details like channel, product, etc as per your need.

The above is one of the ways to handle your scenario. Alternatively you can have custom logic that keeps on running and check whether the logic app needs to be called and use the azure event grid to send the event and that will trigger your main logic app (event grid trigger) on the scheduled time.

Baharul Islam 216 Reputation points

2022-04-01T13:23:27.64+00:00

Thank you @MayankBargali-MSFT for your feedback and guiding on possible way out
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