private async Task CommitEditsInternal(DbConnection connection, Func <Task> successHandler, Func <Exception, Task> errorHandler)
{
try
{
// @TODO: Add support for transactional commits
// Trust the RowEdit to sort itself appropriately
var editOperations = EditCache.Values.ToList();
editOperations.Sort();
foreach (var editOperation in editOperations)
{
// Get the command from the edit operation and execute it
using (DbCommand editCommand = editOperation.GetCommand(connection))
using (DbDataReader reader = await editCommand.ExecuteReaderAsync())
{
// Apply the changes of the command to the result set
await editOperation.ApplyChanges(reader);
}
// If we succeeded in applying the changes, then remove this from the cache
// @TODO: Prevent edit sessions from being modified while a commit is in progress
RowEditBase re;
EditCache.TryRemove(editOperation.RowId, out re);
}
await successHandler();
}
catch (Exception e)
{
await errorHandler(e);
}
}
/// <summary>
/// Removes a pending row update from the update cache.
/// </summary>
/// <exception cref="ArgumentOutOfRangeException">
/// If a pending row update with the given row ID does not exist.
/// </exception>
/// <param name="rowId">The internal ID of the row to reset</param>
public void RevertRow(long rowId)
{
ThrowIfNotInitialized();
// Attempt to remove the row with the given ID
RowEditBase removedEdit;
if (!EditCache.TryRemove(rowId, out removedEdit))
{
throw new ArgumentOutOfRangeException(nameof(rowId), SR.EditDataUpdateNotPending);
}
}
/// <summary>
/// Removes the edit from the edit cache if the row is no longer dirty
/// </summary>
/// <param name="rowId">ID of the update to cleanup</param>
/// <param name="editCellResult">Result with row dirty flag</param>
private void CleanupEditIfRowClean(long rowId, EditCellResult editCellResult)
{
// If the row is still dirty, don't do anything
if (editCellResult.IsRowDirty)
{
return;
}
// Make an attempt to remove the clean row edit. If this fails, it'll be handled on commit attempt.
RowEditBase removedRow;
EditCache.TryRemove(rowId, out removedRow);
}
