public DnsService(ILogger <DnsService> logger, IConfiguration configuration, IServiceScopeFactory scopeFactory)
{
Logger = logger;
ScopeFactory = scopeFactory;
using var scope = scopeFactory.CreateScope();
Options = configuration.GetSection("Host").Get <DnsHostOptions>();
EnsureOptionsSet(Options);
}
private static void EnsureOptionsSet(DnsHostOptions options)
{
if (options == null)
{
throw new InvalidOperationException("No options provided.");
}
if (options.CheckIntervalMs < 1000)
{
throw new InvalidOperationException($"{nameof(DnsHostOptions.CheckIntervalMs)} must be >= 1000.");
}
}