/// <summary>
/// Creates a new instance of the <see cref="ModelRecommenderData"/> class.
/// </summary>
/// <param name="recommender">the underlying SAR recommender</param>
internal ModelRecommenderData(IUserHistoryToItemsRecommender recommender)
{
if (recommender == null)
{
throw new ArgumentNullException(nameof(recommender));
}
Recommender = recommender;
}
/// <summary>
/// Creates a new instance of <see cref="SarScorer"/> class.
/// </summary>
/// <param name="recommender">A trained SAR recommender</param>
/// <param name="tracer">A message tracer to use for logging</param>
public SarScorer(IUserHistoryToItemsRecommender recommender, ITracer tracer = null)
{
if (recommender == null)
{
throw new ArgumentNullException(nameof(recommender));
}
_recommender = recommender;
_tracer = tracer ?? new DefaultTracer();
// create the input schema
_usageDataSchema = SchemaDefinition.Create(typeof(SarUsageEvent));
_usageDataSchema["user"].ColumnType = _recommender.UserIdType;
_usageDataSchema["Item"].ColumnType = _recommender.ItemIdType;
// create an environment and register a message listener
_environment = new TlcEnvironment(verbose: true);
_environment.AddListener <ChannelMessage>(_tracer.TraceChannelMessage);
}
