public static int Next(CloudTable table, string partition_key)
{
lock (table)
{
DynamicTableEntity entity = retrieveEntity(table, partition_key); // null for nonexistent board.
TableRowPond.Notify(table, entity.PartitionKey, entity.RowKey);
int n_value = (int)entity["nextid"].Int32Value;
entity["nextid"].Int32Value = n_value + 1;
table.Execute(TableOperation.Replace(entity)); // Throws StorageException ((412) Precondition Failed) if the entity is modified in between.
return(n_value);
}
}
private static DynamicTableEntity retrieveEntity(CloudTable table, string partition_key)
{
string row_key = partition_key == null ? EMPTY_ROW_KEY : INFO_ROW_KEY;
if (partition_key == null)
{
partition_key = INFO_PAR_KEY;
}
#if OLD
TableResult result = table.Execute(TableOperation.Retrieve(partition_key, row_key));
return((DynamicTableEntity)result.Result);
#else
return(TableRowPond.Get(table, partition_key, row_key)); // May be null.
#endif
}
