public bool Lock(string resourceKey, TimeSpan expires, out LockInfo lockInfo, string resourceValue = null)
{
string value = resourceValue;
if (string.IsNullOrWhiteSpace(value))
{
value = this.CreateUniqueLockId();
}
LockInfo innerLock = null;
bool isSuccess = this.RetryGetLock(retryCount, retryDelay, () =>
{
try
{
int 当前已获得的锁 = 0;
var startTime = DateTime.Now;
this.Foreach_RedisServer(redisServer =>
{
if (this.LockInstance(redisServer, resourceKey, value, expires))
{
当前已获得的锁 += 1;
}
});
var drift = Convert.ToInt32((expires.TotalMilliseconds * 0.01) + 2);
//如果validTimeSpan大于0，表示在超时之前已经获得锁，该锁是有效的
var validTimeSpan = expires - (DateTime.Now - startTime) - TimeSpan.FromMilliseconds(drift);
if (当前已获得的锁 >= 获得锁的临界值 && validTimeSpan.TotalMilliseconds > 0)
{
innerLock = new LockInfo(resourceKey, value, validTimeSpan);
return(true);
}
else
{
//如果没有获取到一半以上的服务器锁，那么要尽快释放之前获得的锁
this.Foreach_RedisServer(redisServer =>
{
this.UnlockInstance(redisServer, resourceKey, value);
});
return(false);
}
}
catch (Exception)
{
return(false);
}
});
lockInfo = innerLock;
return(isSuccess);
}
public void Unlock(LockInfo lockInfo)
{
if (lockInfo == null ||
string.IsNullOrWhiteSpace(lockInfo.ResourceKey) ||
string.IsNullOrWhiteSpace(lockInfo.Value))
{
return;
}
this.Foreach_RedisServer(redisServer =>
{
this.UnlockInstance(redisServer, lockInfo.ResourceKey, lockInfo.Value);
});
}
/// <summary>
/// 释放指定资源的锁
/// </summary>
/// <param name="lockInfo">锁对象</param>
public void Unlock(LockInfo lockInfo)
{
RedisLock redisLock = new RedisLock(RedisManager.Connection);
redisLock.Unlock(lockInfo);
}
/// <summary>
/// 获取指定资源的锁
/// </summary>
/// <param name="resourceKey">锁资源名称</param>
/// <param name="expires">锁过期时间</param>
/// <param name="lockInfo">获取到的锁对象</param>
/// <param name="resourceValue">锁资源对应的值</param>
/// <returns>是否成功获取锁</returns>
public bool Lock(string resourceKey, TimeSpan expires, out LockInfo lockInfo, string resourceValue = null)
{
RedisLock redisLock = new RedisLock(RedisManager.Connection);
return(redisLock.Lock(resourceKey, expires, out lockInfo, resourceValue));
}
