/// <summary>为时间计算分表分库</summary>
/// <param name="time"></param>
/// <returns></returns>
public virtual ShardModel Get(DateTime time)
{
var fi = Field;
if (fi == null)
{
throw new XCodeException("分表策略要求指定时间字段！");
}
if (ConnPolicy.IsNullOrEmpty() && TablePolicy.IsNullOrEmpty())
{
return(null);
}
var table = fi.Factory.Table;
var model = new ShardModel();
if (!ConnPolicy.IsNullOrEmpty())
{
model.ConnName = String.Format(ConnPolicy, table.ConnName, time);
}
if (!TablePolicy.IsNullOrEmpty())
{
model.TableName = String.Format(TablePolicy, table.TableName, time);
}
return(model);
}
private ShardModel[] GetModels(DateTime start, DateTime end)
{
var models = new List <ShardModel>();
// 构建了一个时间区间 start <= @fi < end
// 简单起见，按照分钟步进
ShardModel last = null;
for (var dt = start; dt < end; dt = dt.Add(Step))
{
var model = Get(dt);
if (last == null || model.ConnName != last.ConnName || model.TableName != last.TableName)
{
models.Add(model);
last = model;
}
}
return(models.ToArray());
}
