zszq-trs/YLErpDAL/Modules/DataCacheModule/DataSource/VarietyDataSource.cs

namespace YLErp.Modules.DataCacheModule
{
    public static partial class DataCacheManager
    {
        class VarietyDataSource : GenericeCachedDataSource<Variety>, Abstract.IDataSourceKey2<Variety>
        {
            public override string TableName => nameof(Variety);

            readonly Dictionary<string, Variety> _dicEx;

            private VarietyDataSource()
            {
                _dicEx = new Dictionary<string, Variety>(StringComparer.OrdinalIgnoreCase);
            }

            public Variety GetData(string varietyCode)
            {
                if (string.IsNullOrWhiteSpace(varietyCode))
                {
                    return null;
                }

                lock (this)
                {
                    if (_dicEx.TryGetValue(varietyCode, out var variety))
                    {
                        var clone = variety.Clone();
                        return clone;
                    }

                    using (var db = DbContextFactory.GetYLDbContext())
                    {
                        var va = db.variety.AsNoTracking().FirstOrDefault(n => n.VarietyCode == varietyCode);
                        if (va != null)
                        {
                            _dic[va.id] = va;
                            AfterUpdateHandle(va);
                        }
                        return va?.Clone();
                    }
                }
            }

            private void AfterUpdateHandle(Variety data)
            {
                if (string.IsNullOrWhiteSpace(data.VarietyCode))
                {
                    return;
                }

                _dicEx[data.VarietyCode] = data;
            }

            public static readonly VarietyDataSource Default;

            static VarietyDataSource()
            {
                Default = new VarietyDataSource();
            }
        }
    }
}