Support IAsyncCollector in Node output bindings

We currently only allow you to output a single item (e.g. queue message). We need to support an array of items. This will apply to all binding types that support ICollector (Qeueus, ServiceBus, Tables, etc.).

See SO post here: https://stackoverflow.com/questions/36374464/can-i-queue-multiple-items-from-a-single-run-of-an-azure-function

Can’t get ICollector working for C# either. I expected the following to work but it didn’t:

public static HttpResponseMessage Run(HttpRequestMessage req, ICollector<string> messageQueue, TraceWriter log)
{
    log.Verbose($"C# HTTP trigger function processed a request. RequestUri={req.RequestUri}");

    string[] messages = new [] { "Larry", "Moe", "Curly" };
    foreach (var message in messages)
    {
        messageQueue.Add(message);
    }

    return req.CreateResponse(HttpStatusCode.OK);
}

[mathewc]

Thanks for the eagerness 😃 The plan is @davidebbo will deploy it tomorrow morning. I tested it out and it works great 😃 Here’s an example from our samples, showing how it works.

[TheBlueSky]

Thanks @mathewc and @davidebbo… and I’m glad to report that my first test shows that it works 😃