/// <summary>
/// 延长锁的时间
/// </summary>
/// <param name="lockData"></param>
/// <returns></returns>
public DECheckLockResult ExtendLockTime(DELock lockData)
{
DECheckLockResult result = null;
lockData.LockTime = DateTime.MinValue;
using (TransactionScope scope = TransactionScopeFactory.Create())
{
bool updated = false;
DELock lockInDB = lockInDB = Update(lockData, true, out updated);
if (updated == false)
{
result = BuildNotAvailableResult(lockData);
}
else
{
result = BuildAvailableResult(lockInDB, true);
}
scope.Complete();
}
return(result);
}
private static DECheckLockResult BuildNotAvailableResult(DELock lockData)
{
DECheckLockResult result = new DECheckLockResult();
result.Lock = lockData;
result.LockStatus = DECheckLockStatus.Locked;
return(result);
}
/// <summary>
/// 延长锁的时间
/// </summary>
public void ExtendLock()
{
DELock lockData = this._Lock;
if (lockData == null)
{
lockData = DELock.CreateDefaultDataOperationLock();
}
DECheckLockResult checkResult = DELockAdapter.Instance.ExtendLockTime(lockData);
this._Lock = checkResult.Lock;
}
public void AddLock(TimeSpan effectiveTime, string description)
{
DELock lockData = DELock.CreateDefaultDataOperationLock();
lockData.EffectiveTime = effectiveTime;
lockData.Description = description;
DECheckLockResult checkResult = DELockAdapter.Instance.AddLock(lockData);
if (checkResult.Available == false)
{
throw new DECheckLockException(DECheckLockException.CheckLockResultToMessage(checkResult));
}
this._Lock = checkResult.Lock;
}
private static DECheckLockResult BuildAvailableResult(DELock lockData, bool overrideLock)
{
DECheckLockResult result = new DECheckLockResult();
result.Lock = lockData;
if (overrideLock)
{
result.LockStatus = DECheckLockStatus.LockExpired;
}
else
{
result.LockStatus = DECheckLockStatus.NotLocked;
}
return(result);
}
public static string CheckLockResultToMessage(DECheckLockResult checkResult)
{
checkResult.NullCheck("checkResult");
StringBuilder strB = new StringBuilder();
strB.AppendFormat("申请{0}失败。", EnumItemDescriptionAttribute.GetDescription(checkResult.Lock.LockType));
if (OguBase.IsNotNullOrEmpty(checkResult.Lock.LockPerson))
{
strB.AppendFormat("正在由\"{0}\"执行\"{1}\"。", checkResult.Lock.LockPerson.DisplayName, checkResult.Lock.Description);
}
else
{
strB.AppendFormat("正在执行\"{0}\"", checkResult.Lock.Description);
}
strB.Append("请稍后再尝试。");
return(strB.ToString());
}
/// <summary>
/// 加锁。返回新加的锁，或者原来锁的状态。成功与否，检查SCCheckLockResult的Available属性
/// </summary>
/// <param name="lockData"></param>
/// <returns></returns>
public DECheckLockResult AddLock(DELock lockData)
{
DECheckLockResult result = null;
lockData.LockTime = DateTime.MinValue;
using (TransactionScope scope = TransactionScopeFactory.Create())
{
//插入是否成功，判断锁是否已经存在
DELock lockInDB = Insert(lockData);
if (lockInDB == null)
{
//更新是否成功，如果不成功，表示锁被占用。
bool updated = false;
lockInDB = Update(lockData, false, out updated);
if (updated == false)
{
result = BuildNotAvailableResult(lockInDB);
}
else
{
result = BuildAvailableResult(lockInDB, true);
}
}
else
{
result = BuildAvailableResult(lockInDB, false);
}
scope.Complete();
}
return(result);
}
