EventHub batch processing

[sergsalo]

It seems like Azure Functions' EventHub binding doesn't allow processing of more than one message at a time, when custom webjob does. This slows down processing dramatically. Are there any plans to add a way to process batch of event hub messages?

Signature for Azure Functions binding:
Run(string myEventHubMessage, TraceWriter log)

Something like:
Run(string[] myEventHubMessages, TraceWriter log)

[mathewc]

This is already supported. In a C# function, you can bind to EventData[] events or string[] events. If this doesn't work for you, please reopen the bug with full details.

[sergsalo]

According to this article https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-event-hubs, only next signature is supported:
public static void Run(string myEventHubMessage, TraceWriter log)

It is supported in WebJobs itself, but not in Azure Functions' plugin for EventHubs, seems like to me.

[mathewc]

The docs don't enumerate all the possible signatures that are supported (many are). The docs should be improved I agree to list the possibilities.

When you say "seems like to me" do you mean you actually tried binding to EventData[] events and it doesn't work? It definitely should.

[sergsalo]

I will try and let you know.

[sergsalo]

It works, but requires "WindowsAzure.ServiceBus":"3.4.2" nuget package to be imported. Thanks.
Signature: public static async Task Run(string[] myEventHubMessage, TraceWriter log)