public static Task <bool> CreateIfNotExistsAsync(this CloudTable table,
CancellationToken ct = default(CancellationToken))
{
ICancellableAsyncResult ar = table.BeginCreateIfNotExists(null, null);
ct.Register(ar.Cancel);
return(Task.Factory.FromAsync <bool>(ar, table.EndCreateIfNotExists));
}
public static Task <bool> CreateIfNotExistsAsync(this CloudTable tbl, TableRequestOptions opt, OperationContext ctx, CancellationToken token)
{
ICancellableAsyncResult result = null;
if (opt == null && ctx == null)
{
result = tbl.BeginCreateIfNotExists(null, null);
}
else
{
result = tbl.BeginCreateIfNotExists(opt, ctx, null, null);
}
var cancellationRegistration = token.Register(result.Cancel);
return(Task.Factory.FromAsync(result, ar =>
{
cancellationRegistration.Dispose();
return tbl.EndCreateIfNotExists(ar);
}));
}
public void TableIfExistsShouldNotHitSecondary()
{
AssertSecondaryEndpoint();
TableRequestOptions options = new TableRequestOptions();
CloudTableClient client = GenerateCloudTableClient();
CloudTable table = client.GetTableReference(TableTestBase.GenerateRandomTableName());
TestPrimaryOnlyCommand((opt, ctx) => table.CreateIfNotExists(opt, ctx), options);
TestPrimaryOnlyCommand((opt, ctx) => table.EndCreateIfNotExists(table.BeginCreateIfNotExists(opt, ctx, null, null)), options);
TestPrimaryOnlyCommand((opt, ctx) => table.DeleteIfExists(opt, ctx), options);
TestPrimaryOnlyCommand((opt, ctx) => table.EndDeleteIfExists(table.BeginDeleteIfExists(opt, ctx, null, null)), options);
}
/// <summary>
/// Creates the table if it does not already exist asynchronously.
/// </summary>
/// <param name="cloudTable">Cloud table.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>
/// <c>true</c> if table was created; otherwise, <c>false</c>.
/// </returns>
public static Task <bool> CreateIfNotExistsAsync(
this CloudTable cloudTable,
CancellationToken cancellationToken = default(CancellationToken))
{
ICancellableAsyncResult asyncResult = cloudTable.BeginCreateIfNotExists(null, null);
CancellationTokenRegistration registration = cancellationToken.Register(p => asyncResult.Cancel(), null);
return(Task <bool> .Factory.FromAsync(
asyncResult,
result =>
{
registration.Dispose();
return cloudTable.EndCreateIfNotExists(result);
}));
}
public ICancellableAsyncResult BeginCreateIfNotExists(AsyncCallback callback, object state)
{
return(_cloudTable.BeginCreateIfNotExists(callback, state));
}
