public void Add(WorkUnit workUnit)
{
WorkUnit AddValue(Tuple <string, object> key) => workUnit;
WorkUnit UpdateValue(Tuple <string, object> key, WorkUnit previousWorkUnit) => previousWorkUnit.Merge(workUnit);
_workUnits.AddOrUpdate(workUnit.Key, AddValue, UpdateValue);
}
/// <summary>
/// Merge this work unit with a subsequent work unit.
/// </summary>
/// <param name="second">The subsequent work unit.</param>
/// <returns>A single work unit that combines the two.</returns>
/// <remarks>
/// This is necessary if a transaction has one or more insert/update/delete
/// in a single transaction.
/// </remarks>
public WorkUnit Merge(WorkUnit second)
{
if (second is InsertWorkUnit ins)
{
return(MergeInsert(ins));
}
if (second is UpdateWorkUnit upd)
{
return(MergeUpdate(upd));
}
if (second is DeleteWorkUnit del)
{
return(MergeDelete(del));
}
throw new ArgumentException("unknown work unit type");
}