Azure Webjobs sdk version 3.x is not overriding cron expression for function trigger from application settings of azure

Question

Hi,

I'm trying to run Microsoft.Azure.WebJobs version 3.x from .Net framework 4.7.2 environment. I'm not using appsettings.json but have used Name resolver and reading my application settings from app.config.

I'm able to override the values in project.exe.config but not the CRON expression being used for timer trigger for a function. The WebJob is continuous. I have used timer trigger with %% to invoke.

Here is my builder:
var builder = new HostBuilder();
var resolver = new myNameResolver();
builder.ConfigureWebJobs(buil =>
{
buil.AddAzureStorageCoreServices();
buil.AddAzureStorage();
buil.AddServiceBus(servBus=>
{
servBus.MessageHandlerOptions.AutoComplete = false;
servBus.MessageHandlerOptions.MaxConcurrentCalls = myMaxConcurrentCalls;
servBus.ConnectionString = myServiceBusConnectionString;
servBus.MessageHandlerOptions.MaxAutoRenewDuration = TimeSpan.FromHours(12);
});
buil.AddTimers();
});
builder.ConfigureServices(serv => serv.AddSingleton<INameResolver>(resolver));
builder.ConfigureHostConfiguration(config =>
{
config.AddInMemoryCollection(BuildConfiguration(myStorageConnectionString));
config.AddEnvironmentVariables();
});
builder.ConfigureAppConfiguration(buil => buil.AddEnvironmentVariables());

Answer 1

You can not override cron expression in custom way (appsettings or app.config or code). Either you can set it in the portal or include a settings.job file at the root of your WebJob .zip containing the expression like below for example:

{  
    "schedule": "0 */15 * * * *"  
}  

as documented here.