/// <summary>
/// 异步的，对实体集合进行批量操作。
/// </summary>
/// <param name="instances">要操作的实体序列。</param>
/// <param name="fnOperation">实体操作表达式，权提供 Insert、Update 和 Delete 操作。</param>
/// <param name="batchOpt"></param>
/// <param name="cancellationToken">取消操作的通知。</param>
/// <returns>影响的实体数。</returns>
public async virtual Task <int> BatchAsync(IEnumerable <TEntity> instances, Expression <Func <IRepository <TEntity>, TEntity, int> > fnOperation, BatchOperateOptions batchOpt = null, CancellationToken cancellationToken = default)
{
if (instances.IsNullOrEmpty())
{
return(-1);
}
cancellationToken.ThrowIfCancellationRequested();
var operateName = OperateFinder.Find(fnOperation);
var eventType = GetEventType(operateName);
return(await _subMgr.OnBatchAsync <TEntity, int>(_contextService.ServiceProvider, _options.NotifyEvents,
instances.Cast <IEntity>(), eventType,
() => _repositoryProxy.BatchAsync(instances, fnOperation, batchOpt, cancellationToken)));
}
/// <summary>
/// 异步的，对实体集合进行批量操作。
/// </summary>
/// <param name="instances">要操作的实体序列。</param>
/// <param name="fnOperation">实体操作表达式，权提供 Insert、Update 和 Delete 操作。</param>
/// <param name="cancellationToken">取消操作的通知。</param>
/// <returns>影响的实体数。</returns>
public async Task <int> BatchAsync(IEnumerable <TEntity> instances, Expression <Func <IRepository <TEntity>, TEntity, int> > fnOperation, CancellationToken cancellationToken = default)
{
if (instances.IsNullOrEmpty())
{
return(-1);
}
var operateName = OperateFinder.Find(fnOperation);
var eventType = GetBeforeEventType(operateName);
return(await EntityPersistentSubscribeManager.OnBatchAsync(options.NotifyEvents, instances.Cast <IEntity>(), eventType, () => repositoryProxy.BatchAsync(instances, fnOperation, cancellationToken)));
}
