private async Task Load()
{
CloudTableClient client = _account.CreateCloudTableClient();
var table = client.GetTableReference(CantonConstants.CursorTable);
var op = TableOperation.Retrieve <CursorEntry>("cursors", Key);
var result = await table.ExecuteAsync(op);
if (result.Result == null)
{
_position = CantonConstants.MinSupportedDateTime;
await Save();
}
else
{
CursorEntry entry = (CursorEntry)result.Result;
_position = entry.Position;
if (!String.IsNullOrEmpty(entry.DependantCursors))
{
_dependantCursors = new List <string>(entry.DependantCursors.Split('|'));
}
if (!String.IsNullOrEmpty(entry.Metadata))
{
_metadata = JObject.Parse(entry.Metadata);
}
if (entry.LockId != Guid.Empty && entry.LockExpiration > DateTime.UtcNow)
{
throw new Exception("Unable to use locked cursor");
}
}
}
/// <summary>
/// Saves the cursor to storage. Make sure ALL items with this position have been completed first.
/// </summary>
public async Task Save()
{
var client = _account.CreateCloudTableClient();
var table = client.GetTableReference(CantonConstants.CursorTable);
CursorEntry entry = new CursorEntry(this);
// TODO: Add locking
var op = TableOperation.InsertOrReplace(entry);
await table.ExecuteAsync(op);
}
/// <summary>
/// Saves the cursor to storage. Make sure ALL items with this position have been completed first.
/// </summary>
public async Task Save()
{
var client = _account.CreateCloudTableClient();
var table = client.GetTableReference(CantonConstants.CursorTable);
CursorEntry entry = new CursorEntry(this);
// TODO: Add locking
var op = TableOperation.InsertOrReplace(entry);
await table.ExecuteAsync(op);
}