/// <summary>
/// 对存取器的数据库分片。
/// </summary>
/// <param name="shardingManager">给定的 <see cref="IShardingManager"/>。</param>
/// <param name="accessor">给定的 <see cref="IAccessor"/>。</param>
/// <param name="descriptor">输出 <see cref="ShardedDescriptor"/>。</param>
/// <returns>返回 <see cref="IAccessor"/>。</returns>
public static IAccessor ShardDatabase(this IShardingManager shardingManager, IAccessor accessor,
[MaybeNullWhen(false)] out ShardedDescriptor descriptor)
{
var attribute = accessor.AccessorDescriptor?.Sharded;
if (attribute is null)
{
descriptor = null;
return(accessor);
}
descriptor = shardingManager.CreateDescriptor(attribute);
descriptor.DefaultStrategy?.FormatSuffix(descriptor);
var shardedName = descriptor.ToString();
if (!shardedName.Equals(descriptor.BaseName, StringComparison.Ordinal))
{
var newConnectionString = accessor.CurrentConnectionString !
.Replace(attribute.BaseName !, shardedName);
accessor.ChangeConnection(newConnectionString);
}
return(accessor);
}
