Multi Schema/Endpoint for HotChocolate Azure Functions.

Azure supports multiple endpoints using multiple functions, official implementation of HotChocolate (as 13.0.0-preview.66) does not yet.

I let it be as mush as possible aspnet like implementation, so we do not need to change a lot of code when coming from server project.

Azure Functions in process

Install

dotnet add package Markind.HotChocolate.AzureFunctions

Why Markind? it is the name of the company I am willing to build. It is about to left mark in the earth.

Startup

[assembly: FunctionsStartup(typeof(Startup))]

public class Startup : FunctionsStartup
{
    public override void Configure(IFunctionsHostBuilder builder)
    {
        builder.Services.AddGraphQLServer("persons") // schema 1
                        .AddQueryType<Query>();

        builder.Services.AddGraphQLServer("persons2") // schema 2, etc..
                        .AddQueryType<Query2>();

        builder.AddGraphQLFunctions(); // Add support for Azure FunctionS
    }
}

Function

Make sure to use IMultiSchemaRequestExecutor.

public class GraphQLFunction
{
    [FunctionName("GraphQLHttpFunction")]
    public Task<IActionResult> Run(
        [HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = "persons/{**slug}")] 
        HttpRequest request,
        [GraphQL] 
        IMultiSchemaRequestExecutor executor)
        => executor.ExecuteAsync(request, "persons");
}

Create the other functions and make sure to set the schema name executor.ExecuteAsync(request, "persons2");

Full sample at samples/Azf

---

Azure Functions Isolated Process

Install

dotnet add package Markind.HotChocolate.AzureFunctions.IsolatedProcess

Why Markind? it is the name of the company I am willing to build. It is about to left mark in the earth.

Program

using Microsoft.Azure.Functions.Extensions.DependencyInjection;

var host = new HostBuilder()
    .ConfigureFunctionsWorkerDefaults()
    .ConfigureServices(s =>{
        s.AddGraphQLServer("persons") // schema 1
        .AddQueryType<Query>();

        s.AddGraphQLServer("persons2") // schema 2 , etc.
        .AddQueryType<Query2>();
    })
    .AddGraphQLFunctions()// Add support for Azure FunctionS
    .Build();

host.Run();

Similarly if using Startup.cs

Function

Again make sure to use IMultiSchemaRequestExecutor.

public class GraphQLFunction
{
    private readonly IMultiSchemaRequestExecutor _executor;

    public GraphQLFunction(IMultiSchemaRequestExecutor executor)
    {
        _executor = executor;
    }

    [Function("GraphQLHttpFunction")]
    public Task<HttpResponseData> Run(
        [HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = "persons/{**slug}")]
        HttpRequestData request)
        => _executor.ExecuteAsync(request, "persons");
}

Create the other functions and make sure to set the schema name executor.ExecuteAsync(request, "persons2");

Full sample at samples/Azf.IsolatedProcess

Sponsor it

Glad to be of help, it took me more than a week cracking my head :') to understand how it should work and give the easiest and smoothly solution possible. I am willing to improve it or fix issues if needed. So if you wish ❤️

Mentions

Base code is using official implementation of HotChocolate.AzureFunctions and I reviewed a lot GraphQL.AzureFunctionsProxy

Notice

This implementation has original implementation from HotChocolate.AzureFunctions as well, I made this way with the hope of integrate it in the official HotChocolate repo. Be sure to use .AddGraphQLFunctions() with s at the end, using without it you will be using original implementation that has no multi schema support.