/// <summary>
/// 解锁实例
/// </summary>
/// <param name="key">key</param>
/// <param name="value">值</param>
private void UnlockInstance(string key, byte[] value)
{
RedisKey[] keys = { CacheKeyConverter.GetKeyWithRegion(key) };
RedisValue[] values = { value };
GetDatebase().ScriptEvaluate(
UnlockScript,
keys,
values
);
}
public T GetOrAdd <T>(string key, Func <T> getData, TimeSpan?expiry = null)
{
var value = GetDatebase().StringGet(CacheKeyConverter.GetKeyWithRegion(key));
if (value.HasValue)
{
return(GetValue <T>(value));
}
var mutexKey = string.Format(MutexKeyFormat, key);
// 防击穿（热点key并发）
var uniqueValue = CreateUniqueLockId();
try
{
if (SetNotExists(mutexKey, uniqueValue, TimeSpan.FromMinutes(1)))
{
var result = getData();
_loggerLazy.Value.LogInformation($"GetOrAdd, [key:{key}], call getData func");
//防穿透
if (result == null)
{
Set(key, default(T), TimeSpan.FromSeconds(1));
}
else
{
Set(key, result, expiry);
}
return(result);
}
}
finally
{
UnlockInstance(mutexKey, uniqueValue);
}
Thread.Sleep(50);
return(GetOrAdd(key, getData, expiry));
}
/// <summary>
/// 设置不存在的值
/// </summary>
/// <param name="key">缓存键</param>
/// <param name="value">值</param>
/// <param name="expiry">过期时间</param>
/// <returns></returns>
private bool SetNotExists(string key, byte[] value, TimeSpan?expiry = null)
{
return(GetDatabase().StringSet(CacheKeyConverter.GetKeyWithRegion(key), value, expiry, When.NotExists));
}
/// <summary>
/// 删除指定key
/// </summary>
/// <param name="key">缓存键</param>
/// <returns></returns>
public bool Delete(string key)
{
return(GetDatabase().KeyDelete(CacheKeyConverter.GetKeyWithRegion(key)));
}
/// <summary>
/// 设置数据
/// </summary>
/// <typeparam name="T">数据类型</typeparam>
/// <param name="key">缓存键</param>
/// <param name="value">值</param>
/// <param name="expiry">过期时间</param>
/// <returns></returns>
public bool Set <T>(string key, T value, TimeSpan?expiry = null)
{
return(GetDatabase().StringSet(CacheKeyConverter.GetKeyWithRegion(key), JsonUtil.ToJson(value), expiry));
}
/// <summary>
/// 获取key的数据
/// </summary>
/// <typeparam name="T">数据类型</typeparam>
/// <param name="key">缓存键</param>
/// <returns></returns>
public T Get <T>(string key)
{
return(GetValue <T>(GetDatabase().StringGet(CacheKeyConverter.GetKeyWithRegion(key))));
}
public bool Set <T>(string key, T value, TimeSpan?expiry = null)
{
return(GetDatebase().StringSet(CacheKeyConverter.GetKeyWithRegion(key), JsonHelper.SerializeObject(value), expiry));
}