The thing that got me excited about the Power BI Enhanced Refresh API, and which inspired me to start this series of posts, was the fact that for the first time it gives you a way of cancelling Power BI dataset refreshes. In this last post in the series I’ll show you how you can add an Action to your Power Automate custom connector to cancel a refresh and how you can use it in a Power Automate Flow.
Adding a new Action is straightforward and very similar to what I’ve shown in previous posts in this series. As before, click on the New action button on the Definition stage of the custom connector wizard, fill in the General section with appropriate names:
…then use the Import from sample option to populate the Request section using the DELETE verb and the following URL for the Cancel Refresh In Group API endpoint:
The refreshId, which uniquely identifies the refresh operation you which to cancel can be obtained from the Action I described in part 4 of this series that can be used to kick off a refresh.
Using this new Action in a Flow is more interesting. Here’s an example Flow that kicks off a dataset refresh but cancels it if it goes on for more than 120 seconds; it’s similar to, but more complex than, the Flow I described in this post that checks the status of a refresh. At the top level it looks like this:
The first two actions kick off a full refresh of a dataset:
The next two Actions initialise two variables:
- ElapsedRefreshDurationSeconds is an integer used to hold the amount of time in seconds that the refresh has been running for each time it is checked
- StopCheckingRefreshStatus is a boolean variable used to determine whether the upcoming Do until loop should be terminated or not
The contents of the Do until loop look like this:
After waiting 30 seconds the status of the refresh is checked. If the status is “Unknown” then the refresh is ongoing and the next step is to check how long it has been running for; otherwise the refresh has completed at the StopCheckingRefreshStatus variable can be set to true so the Do until loop can be terminated. Drilling into the “Is refresh ongoing” conditional Action:
If the refresh is still in progress then the current elapsed duration in seconds of the refresh is calculated using the following expression (this blog post showed me how to calculate durations in Power Automate):
If that elapsed duration is more than 120 seconds then the refresh should be cancelled; otherwise no action is taken. Drilling into the Yes branch of the conditional Action:
The refresh is cancelled by calling the Action created at the beginning of this post; after the cancellation the StopCheckingRefreshStatus variable is set to true. Here are details of the Actions from the Yes branch that do this:
That’s it for this post and this series. Since I started the series over a month ago a few other articles on similar subjects have been published on LinkedIn that you might want to check out, by my colleagues Romain Casteres and Rui Romano; as more enterprise BI solutions are built on Power BI, I know there will be a lot more people implementing complex refresh scenarios using Power Automate/Logic Apps and the Enhanced Refresh API.