/// <summary>
/// Initializes a new instance of the <see cref="DataLoader{TKey, TValue}"/> class.
/// </summary>
/// <param name="batchScheduler">
/// A scheduler to tell the <c>DataLoader</c> when to dispatch buffered batches.
/// </param>
/// <param name="options">
/// An options object to configure the behavior of this particular
/// <see cref="DataLoader{TKey, TValue}"/>.
/// </param>
/// <exception cref="ArgumentNullException">
/// Throws if <paramref name="options"/> is <c>null</c>.
/// </exception>
protected DataLoaderBase(IBatchScheduler batchScheduler, DataLoaderOptions <TKey>?options)
{
_options = options ?? new DataLoaderOptions <TKey>();
_cache = _options.Cache ?? new TaskCache(_options.CacheSize);
_cacheKeyResolver = _options.CacheKeyResolver ?? ((TKey key) => key);
_batchScheduler = batchScheduler;
_maxBatchSize = _options.GetBatchSize();
}
/// <summary>
/// Initializes a new instance of the
/// <see cref="DataLoaderBase{TKey, TValue}"/> class.
/// </summary>
/// <param name="options">
/// A configuration for <c>DataLoaders</c>.
/// </param>
/// <param name="cache">
/// A cache instance for <c>Tasks</c>.
/// </param>
/// <exception cref="ArgumentNullException">
/// Throws if <paramref name="options"/> is <c>null</c>.
/// </exception>
/// <exception cref="ArgumentNullException">
/// Throws if <paramref name="cache"/> is <c>null</c>.
/// </exception>
protected DataLoaderBase(DataLoaderOptions <TKey> options, ITaskCache <TValue> cache)
{
_options = options ??
throw new ArgumentNullException(nameof(options));
_buffer = new TaskCompletionBuffer <TKey, TValue>();
_cache = cache ?? throw new ArgumentNullException(nameof(cache));
_cacheKeyResolver = _options.CacheKeyResolver ??
((TKey key) => key);
StartAsyncBackgroundDispatching();
}
