How to set EventHubOptions in Isolated Azure Function

Question

I had in-process azure function with event hub trigger. I was configuring EventHubOptions programmatically as below:

            builder.Services.PostConfigure<EventHubOptions>(o =>
            {
                o.MaxEventBatchSize = maxBatchSizeValue;
                o.PrefetchCount = prefetchCountValue;
            });

But after migrating to isolated azure function, there is no EventHubOptions class so how can I configure it?

Answer 1

@Sayed Reda Thanks for reaching out. In the isolated worker model, you can’t change the host configuration in code because your function runs in a separate process from the host. Instead, you need to configure settings like maxBatchSize and prefetchCount in the host.json file.

https://learn.microsoft.com/en-us/azure/azure-functions/functions-bindings-event-hubs?tabs=isolated-process%2Cextensionv5&pivots=programming-language-csharp#hostjson-settings

This is mentioned here please refer: https://learn.microsoft.com/en-us/azure/azure-functions/dotnet-isolated-process-guide?tabs=linux#configuration

do let me know incase of further queries, I would be happy to assist you.