/// <summary>
/// Asynchronously Creates a table with specified capacities, hash and range keys and indexes.
/// If it doesn't exist yet.
/// </summary>
public static async Task CreateTableIfNotExistsAsync <TEntity>(this DataContext context, CreateTableArgs <TEntity> args)
{
var entityType = typeof(TEntity);
string tableName = context.GetTableNameForType(entityType);
// checking if the table exists
if
(
await Task.Run(() =>
{
Table t;
return(Table.TryLoadTable(context.Client, tableName, out t));
})
)
{
return;
}
context.Log("Table {0} doesn't exist - about to create it...", tableName);
// creating the table asyncronously
await context.Client.CreateTableAsync(args.GetCreateTableRequest(tableName));
context.Log("Waiting for the table {0} to be created...", tableName);
// waiting till the table is created
await TillTableIsCreatedAsync(context.Client, tableName);
context.Log("Table {0} created successfully!", tableName);
// now adding initial entities
if (args.GetInitialEntitiesFunc != null)
{
context.Log("About to fill table {0} with initial entities...", tableName);
Exception initialFillException = null;
try
{
var table = context.GetTable <TEntity>();
foreach (var entity in args.GetInitialEntitiesFunc())
{
table.InsertOnSubmit(entity);
}
await context.SubmitChangesAsync();
context.Log("Table {0} successfully filled with initial entities.", tableName);
}
catch (Exception ex)
{
initialFillException = ex;
}
// if we failed to add initial data, then removing the table
if (initialFillException != null)
{
context.Log("An error occured while filling table {0} with initial entities. So, removing the table...", tableName);
await DeleteTableAsync <TEntity>(context);
context.Log("Table {0} removed.", tableName);
throw initialFillException;
}
}
}
/// <summary>
/// Creates a table with specified capacities, hash and range keys and indexes.
/// If it doesn't exist yet.
/// </summary>
public static void CreateTableIfNotExists <TEntity>(this DataContext context, CreateTableArgs <TEntity> args)
{
GeneralUtils.SafelyRunSynchronously(context.CreateTableIfNotExistsAsync, args);
}
