/// <summary>
/// 获取指定类型的仓储
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
private IRepository FindRepository(Type type)
{
if (_repositoriesCache.ContainsKey(type.FullName))
{
return(_repositoriesCache[type.FullName]);
}
var repository = RepositoryFacade.Find(type);
_repositoriesCache[type.FullName] = repository;
return(repository);
}
/// <summary>
/// 执行数据归档。
/// </summary>
/// <param name="context">表示数据归档的上下文。</param>
public void Archive(AggregationArchiveContext context)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
_orignalDataDbSettingName = context.OrignalDataDbSettingName;
_backUpDbSettingName = context.BackUpDbSettingName;
var updatedTimeCondition = new PropertyMatch(EntityStampExtension.UpdatedTimeProperty, PropertyOperator.LessEqual, context.DateOfArchiving);
bool needProgress = this.ProgressChanged != null;
if (needProgress)
{
this.OnProgressChanged("-------------- 开始数据归档 --------------");
}
using (StampContext.DisableAutoSetStamps())
{
foreach (var item in context.ItemsToArchive)
{
var aggtRootType = item.AggregationRoot;
var archiveType = item.ArchiveType;
if (archiveType == ArchiveType.Copy)
{
throw new NotSupportedException("Copy 操作暂不支持。");
}
var repository = RepositoryFacade.Find(aggtRootType);
#region 查询本次需要归档的总数据行数。
long totalCount = 0;
if (needProgress)
{
totalCount = repository.CountBy(new CommonQueryCriteria {
updatedTimeCondition
});
this.OnProgressChanged($"目前，共有 {totalCount} 个聚合根 {aggtRootType.FullName} 需要归档。");
}
#endregion
#region 构造一个查完整聚合的条件对象 CommonQueryCriteria
//设置 EagerLoadOptions，加载整个聚合。
var criteria = new CommonQueryCriteria()
{
updatedTimeCondition
};
criteria.PagingInfo = new PagingInfo(1, context.BatchSize);
var eagerLoadOptions = new EagerLoadOptions();
EagerLoadAggregationRecur(eagerLoadOptions, repository.EntityMeta);
if (repository.SupportTree)
{
eagerLoadOptions.LoadWithTreeChildren();
}
criteria.EagerLoad = eagerLoadOptions;
#endregion
//逐页迁移历史数据表。
var currentProcess = 0;
while (true)
{
//获取最新的一页的数据。
var entitiesToMigrate = repository.GetBy(criteria);
var count = entitiesToMigrate.Count;
if (count == 0)
{
break;
}
using (var tranOriginal = RF.TransactionScope(_orignalDataDbSettingName))
using (var tranBackup = RF.TransactionScope(_backUpDbSettingName))
{
//迁移到历史表。
this.BackupToHistory(repository, entitiesToMigrate);
//实体删除
this.DeleteOriginalData(repository, entitiesToMigrate);
//备份完成，才能同时提交两个库的事务。
tranOriginal.Complete();
tranBackup.Complete();
}
currentProcess += count;
if (needProgress)
{
this.OnProgressChanged($" 处理进度", decimal.Round(currentProcess / totalCount * 100, 2));
}
}
}
}
if (needProgress)
{
this.OnProgressChanged("-------------- 结束数据归档 --------------");
}
}
