/// <summary>
/// Sets default row fields provider. This instance is required
/// as rows might have to be created in contexts where dependency injection
/// is not possible, like deserialization. If using a DI container,
/// set this at startup to the same singleton service you register with DI.
/// </summary>
/// <param name="provider">Provider. Required.</param>
/// <returns>Old default provider</returns>
public static IRowFieldsProvider SetDefault(IRowFieldsProvider provider)
{
var old = defaultProvider;
defaultProvider = provider ?? throw new ArgumentNullException(nameof(provider));
return(old);
}
/// <summary>
/// Sets local row fields provider for current thread and async context.
/// Useful for background tasks, async methods, and testing to set provider locally and for
/// auto spawned threads.
/// </summary>
/// <param name="provider">Row fields provider. Can be null.</param>
/// <returns>Old local provider if any.</returns>
public static IRowFieldsProvider SetLocal(IRowFieldsProvider provider)
{
var old = localProvider.Value;
localProvider.Value = provider;
return(old);
}
static RowFieldsProvider()
{
defaultProvider = FallbackRowFieldsProvider.Instance;
localProvider = new AsyncLocal <IRowFieldsProvider>();
}
