Is there a way to configure the KeepAliveInterval option for a SignalR hub when using Azure SignalR Service?
I’m primarily a frontend developer, so I’m not very familiar with the backend setup. We are using Azure SignalR Service with a ServerlessHub in an in-process model, as far as I understand. You can see the relevant documentation
I’ve gone through the available docs but haven’t found a way to configure this option. A backend developer mentioned that it should be added to our local.settings.json. Currently, our configuration looks something like this:
{
"values": {
"Azure:SignalR:HubProtocol:NewtonsoftJson:CamelCase": true,
}
}
Configure KeepAliveInterval to set the interval used by the server using AddSignalR method in Startup.cs file to configure SignalR service options.
Set the KeepAliveProperty in Startup.cs:
options.KeepAliveInterval = TimeSpan.FromSeconds(120);
I have created a .NET in-process Signal Azure function and used below code to configure KeepAliveInterval in Startup.cs.
Startup.cs:
using Microsoft.Azure.Functions.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Azure.WebJobs.Extensions.SignalRService;
using Microsoft.Azure.SignalR;
using System;
using System.Threading.Tasks;
[assembly: FunctionsStartup(typeof(FunctionApp35.Startup))]
namespace FunctionApp35
{
public class Startup : FunctionsStartup
{
public override void Configure(IFunctionsHostBuilder builder)
{
builder.Services.AddSignalR(options =>
{
// Set the KeepAliveInterval
options.KeepAliveInterval = TimeSpan.FromSeconds(120);
});
}
}
}
Function.cs:
[FunctionName("negotiate")]
public static SignalRConnectionInfo Negotiate(
[HttpTrigger(AuthorizationLevel.Anonymous, "get","post")] HttpRequest req,
[SignalRConnectionInfo(HubName = "eventhub")] SignalRConnectionInfo connectionInfo)
{
return connectionInfo;
}
Console Response:
Functions:
negotiate: [GET,POST] http://localhost:7003/api/negotiate
For detailed output, run func with --verbose flag.
[2024-09-17T12:46:35.657Z] Host lock lease acquired by instance ID '000000000000000000000000F72731CC'.
[2024-09-17T12:46:42.135Z] Executing 'negotiate' (Reason='This function was programmatically called via the host APIs.', Id=f23d5ee9-8XXX9bd-a108-005c4d235fa3)
[2024-09-17T12:46:42.205Z] Executed 'negotiate' (Succeeded, Id=f23d5eeXXX8-49bd-a108-005c4d235fa3, Duration=245ms)
2