agent-framework/dotnet/samples/AzureFunctions/09_Workflow/OrchFunction.cs

// Copyright (c) Microsoft. All rights reserved.

using Microsoft.Azure.Functions.Worker;
using Microsoft.Azure.Functions.Worker.Http;
using Microsoft.DurableTask;
using Microsoft.DurableTask.Client;
using Microsoft.Extensions.Logging;

namespace SingleAgent;

public static class OrchFunction
{
    [Function(nameof(OrchFunction))]
    public static async Task<List<string>> RunOrchestratorAsync(
        [OrchestrationTrigger] TaskOrchestrationContext context)
    {
        ILogger logger = context.CreateReplaySafeLogger(nameof(OrchFunction));
        logger.LogInformation("Saying hello.");
        var outputs = new List<string>();

        outputs.Add("Tokyo");

        return outputs;
    }

    [Function("OrchFunction_HttpStart")]
    public static async Task<HttpResponseData> HttpStartAsync(
        [HttpTrigger(AuthorizationLevel.Anonymous, "get", "post")] HttpRequestData req,
        [DurableClient] DurableTaskClient client,
        FunctionContext executionContext)
    {
        // Function input comes from the request content.
        string instanceId = await client.ScheduleNewOrchestrationInstanceAsync(
           nameof(OrchFunction));

        // Returns an HTTP 202 response with an instance management payload.
        // See https://learn.microsoft.com/azure/azure-functions/durable/durable-functions-http-api#start-orchestration
        return await client.CreateCheckStatusResponseAsync(req, instanceId);
    }
}