public static IServiceCollection AddCustomService(this IServiceCollection services, Action <CustomServiceBuilder> options)
{
var serviceBuilder = new CustomServiceBuilder(services);
options?.Invoke(serviceBuilder);
return(serviceBuilder.Services);
}
public static CustomServiceBuilder AddInMemoryCache(this CustomServiceBuilder serviceBuilder)
{
// Check dependent services
//https://docs.microsoft.com/en-us/aspnet/core/performance/caching/memory?view=aspnetcore-3.1
//For most apps, IMemoryCache is enabled. For example, calling AddMvc, AddControllersWithViews, AddRazorPages, AddMvcCore().AddRazorViewEngine, and many other Add{Service} methods in ConfigureServices, enables IMemoryCache.
//For apps that are not calling one of the preceding Add{Service} methods, it may be necessary to call AddMemoryCache in ConfigureServices before calling this method.
//In this sample project, it has called AddRazorPages() in Startup.cs. Hence, it will have the IMemoryCache registered already.
//Do not put any IMemoryCache service registration here to prevent tightly bound of IMemoryCache implementation to any concrete implementation
if (!serviceBuilder.Services.Any(s => s.ServiceType == typeof(IMemoryCache)))
{
throw new NotSupportedException("You need to register a IMemoryCache service in order to use Memory Cache");
}
serviceBuilder.Services.AddInMemoryCache();
return(serviceBuilder);
}