public string Get(string key)
{
//从Redis取数据
var result = redisHelper.Get(key);
if (result == null)
{
try
{
//获取锁
if (Monitor.TryEnter(LockObj))
{
//从数据库取数据
result = "Select * From DbTable";
if (result != null)
{
//写入Redis缓存
redisHelper.Insert(key, result);
}
//释放锁
Monitor.Exit(LockObj);
}
else
{
Thread.Sleep(100);
result = redisHelper.Get(key);
}
}
finally
{
if (Monitor.IsEntered(LockObj))
{
Monitor.Exit(LockObj);
}
}
}
return(result.ToString());
}