/// <summary>
/// Begins an asynchronous operation to delete a table.
/// </summary>
/// <param name="tableName">The table name.</param>
/// <param name="callback">The callback delegate that will receive notification when the asynchronous operation completes.</param>
/// <param name="state">A user-defined object that will be passed to the callback delegate.</param>
/// <returns>
/// An <see cref="IAsyncResult"/> that references the asynchronous request.
/// </returns>
public IAsyncResult BeginDeleteTable(string tableName, AsyncCallback callback, object state)
{
CommonUtils.CheckStringParameter(tableName, false, "tableName", Protocol.Constants.TableServiceMaxStringPropertySizeInChars);
TableServiceUtilities.CheckTableName(tableName, "tableName");
return(TaskImplHelper.BeginImplWithRetry(() => this.DeleteTableImpl(tableName), RetryPolicy, callback, state));
}
/// <summary>
/// Begins an asynchronous operation to delete the tables if it exists.
/// </summary>
/// <param name="tableName">The table name.</param>
/// <param name="callback">The callback delegate that will receive notification when the asynchronous operation completes.</param>
/// <param name="state">A user-defined object that will be passed to the callback delegate.</param>
/// <returns>An <see cref="IAsyncResult"/> that references the asynchronous operation.</returns>
public IAsyncResult BeginDeleteTableIfExist(string tableName, AsyncCallback callback, object state)
{
CommonUtils.CheckStringParameter(tableName, false, "tableName", Protocol.Constants.TableServiceMaxStringPropertySizeInChars);
TableServiceUtilities.CheckTableName(tableName, "tableName");
return(TaskImplHelper.BeginImpl <bool>((setResult) => this.DeleteTableIfExistImpl(tableName, setResult), callback, state));
}
/// <summary>
/// Creates the tables needed for the specified service context.
/// </summary>
/// <param name="serviceContextType">The type of service context.</param>
/// <param name="baseAddress">The Table service endpoint to use to create the client.</param>
/// <param name="credentials">The account credentials.</param>
public static void CreateTablesFromModel(Type serviceContextType, string baseAddress, StorageCredentials credentials)
{
var client = new CloudTableClient(baseAddress, credentials);
foreach (var table in TableServiceUtilities.EnumerateEntitySetNames(serviceContextType))
{
client.CreateTableIfNotExist(table);
}
}
/// <summary>
/// Verifies whether the table exist implementation.
/// </summary>
/// <param name="tableName">The table name.</param>
/// <param name="setResult">The set result.</param>
/// <returns>A sequence of tasks to do the operation.</returns>
private TaskSequence DoesTableExistImpl(string tableName, Action <bool> setResult)
{
CommonUtils.CheckStringParameter(tableName, false, "tableName", Protocol.Constants.TableServiceMaxStringPropertySizeInChars);
TableServiceUtilities.CheckTableName(tableName, "tableName");
var svc = this.GetDataServiceContext();
var tableExistsQuery = (from table in svc.CreateQuery <TableServiceTable>(Protocol.Constants.TableServiceTablesName)
where table.TableName == tableName
select table).AsTableServiceQuery();
ResultSegment <TableServiceTable> segment = null;
while (true)
{
Task <ResultSegment <TableServiceTable> > tableExistsSegmentTask;
if (segment == null)
{
tableExistsSegmentTask = TaskImplHelper.GetRetryableAsyncTask <ResultSegment <TableServiceTable> >(
(setResultInner) => tableExistsQuery.ExecuteSegmentedImpl(null, setResultInner), RetryPolicy);
}
else
{
tableExistsSegmentTask = TaskImplHelper.GetRetryableAsyncTask <ResultSegment <TableServiceTable> >(segment.GetNextImpl, RetryPolicy);
}
yield return(tableExistsSegmentTask);
if (GetResultOrDefault(tableExistsSegmentTask, out segment))
{
if (segment.Results.Any())
{
setResult(true);
break;
}
else
{
setResult(false);
break;
}
}
else
{
setResult(false);
break;
}
}
}
/// <summary>
/// Creates the table if not exist implementation.
/// </summary>
/// <param name="tableName">The table name.</param>
/// <param name="setResult">The set result.</param>
/// <returns>A sequence of tasks to do the operation.</returns>
private TaskSequence CreateTableIfNotExistImpl(string tableName, Action <bool> setResult)
{
CommonUtils.CheckStringParameter(tableName, false, "tableName", Protocol.Constants.TableServiceMaxStringPropertySizeInChars);
TableServiceUtilities.CheckTableName(tableName, "tableName");
var doesTableExistTask = new InvokeTaskSequenceTask <bool>((set) => this.DoesTableExistImpl(tableName, set));
yield return(doesTableExistTask);
if (doesTableExistTask.Result)
{
setResult(false);
}
else
{
var createTableTask = TaskImplHelper.GetRetryableAsyncTask <InvalidOperationException>((resultSetter) => this.CreateTableImpl(tableName, resultSetter), RetryPolicy);
yield return(createTableTask);
// wrap any exceptions
try
{
if (createTableTask.Result == null)
{
setResult(true);
}
else
{
StorageClientException exception = Utilities.TranslateDataServiceClientException(createTableTask.Result) as StorageClientException;
if (exception != null &&
exception.ErrorCode == StorageErrorCode.ResourceAlreadyExists &&
exception.ExtendedErrorInformation != null &&
exception.ExtendedErrorInformation.ErrorCode == TableErrorCodeStrings.TableAlreadyExists)
{
setResult(false);
}
else
{
throw createTableTask.Result;
}
}
}
catch (InvalidOperationException ex)
{
throw Utilities.TranslateDataServiceClientException(ex);
}
}
}
