public ActionConfirmation Delete(int itemId)
{
var emailToDelete = _queueRepository.Get(itemId);
if (emailToDelete != null)
{
try
{
_queueRepository.Delete(emailToDelete);
_queueRepository.DbContext.CommitChanges();
return(ActionConfirmation.CreateSuccess("The email was successfully deleted."));
}
catch
{
return
(ActionConfirmation.CreateFailure(
"A problem was encountered preventing the email from being deleted. " +
"Another item likely depends on this email"));
}
}
return
(ActionConfirmation.CreateFailure(
"The email could not be found to deletion. It may already have been deleted"));
}
/// <summary>
/// 在队列中对发送失败的邮件更新下次发送时间及发送次数，并且删除超过最大发送次数的邮件
/// </summary>
/// <param name="ids">发送失败的邮件Id集合</param>
/// <param name="retryInterval">失败的Email过多少分钟再次重新发送</param>
/// <param name="maxNumberOfTries">尝试发送的最大次数，超过该次数将设置为失败状态</param>
public void SendFailed(IEnumerable <int> ids, int retryInterval, int maxNumberOfTries)
{
//根据当前的TryTime，若maxNumberOfTries <= TryTime+1 则：设置邮件状态IsFailed为：True
// 若maxNumberOfTries > TryTime+1 则：设置邮件NumberOfTries,根据retryInterval，修改NextTryTime
//操作步骤：
//1 根据ids获取所有的实体
//2 逐个进行判断，然后，编辑修改
//由于发送失败属于异常情况，暂不考虑性能问题
if (ids == null)
{
return;
}
foreach (int id in ids)
{
EmailQueueEntry emailQueueEntry = emailQueueRepository.Get(id);
if (emailQueueEntry == null)
{
continue;
}
else
{
//尝试次数大于等于最多尝试次数，设置为发送失败
if ((emailQueueEntry.NumberOfTries + 1) >= maxNumberOfTries)
{
emailQueueEntry.IsFailed = true;
}
else//修改尝试时间和下次尝试时间
{
emailQueueEntry.NumberOfTries = emailQueueEntry.NumberOfTries + 1;
emailQueueEntry.NextTryTime = DateTime.UtcNow.AddMinutes(retryInterval);
}
//更新到数据库
emailQueueRepository.Update(emailQueueEntry);
}
}
}