//slidingExpiration 时间内无访问则过期
public void Overwrite <T>(String key, T value, TimeSpan slidingExpiration)
{
//_client.Store(StoreMode.Set, BuildCacheKey(key), value, slidingExpiration);
var cacheWraper = new SlidingCacheWrapper <T>(value, slidingExpiration);
_client.Store(StoreMode.Set, BuildCacheKey(key), cacheWraper,
TimeSpan.FromSeconds(slidingExpiration.TotalSeconds * 1.5));
}
public override bool TryGet <T>(string key, out T entry)
{
Object cacheEntry;
Boolean exist = TryGetObject(key, out cacheEntry);
if (!exist)
{
//不存在
entry = default(T);
return(false);
}
if (cacheEntry == null)
{
//存在但为 null
entry = (T)((Object)null);
return(true);
}
if (cacheEntry is T)
{
//存在，直接返回
entry = (T)cacheEntry;
return(true);
}
//使用与不使用 NewtonsoftJsonTranscoder 的情况下都支持
SlidingCacheWrapper <T> slidingCache;
if (SlidingCacheWrapper <T> .IsSlidingCache(cacheEntry, out slidingCache))
{
//尝试以 SlidingCacheWrapper<T> 处理
var diffSpan = DateTime.Now.Subtract(slidingCache.SettingTime);
//当前时间-设置时间>滑动时间, 已经过期
if (diffSpan > slidingCache.SlidingExpiration)
{
Expire(key);
entry = default(T);
return(false);
}
//当前时间-设置时间> 滑动时间/2, 更新缓存
if (diffSpan.Add(diffSpan) > slidingCache.SlidingExpiration)
{
Overwrite(key, slidingCache.Value, slidingCache.SlidingExpiration);
}
entry = slidingCache.Value;
}
else
{
//尝试以普通JSON处理
entry = NewtonsoftJsonUtil.EnsureObjectType <T>(cacheEntry);
}
return(true);
}
//slidingExpiration 时间内无访问则过期
public override void Overwrite <T>(String key, T value, TimeSpan slidingExpiration)
{
if (_config.Readonly)
{
throw new InvalidOperationException();
}
//_client.Store(StoreMode.Set, BuildCacheKey(key), value, slidingExpiration);
var cacheWraper = new SlidingCacheWrapper <T>(value, slidingExpiration);
_client.Store(StoreMode.Set, BuildCacheKey(key), cacheWraper,
TimeSpan.FromSeconds(slidingExpiration.TotalSeconds * 1.5));
}
public override bool TryGet <T>(string key, out T value)
{
String cacheKey = BuildCacheKey(key);
Object cacheValue;
var exists = _client.TryGet(cacheKey, out cacheValue);
if (!exists)
{
value = default(T);
return(false);
}
if (cacheValue is T)
{
value = (T)cacheValue;
return(true);
}
if (cacheValue == null)
{
value = (T)((Object)null);
return(true);
}
//使用与不使用 NewtonsoftJsonTranscoder 的情况下都支持
SlidingCacheWrapper <T> slidingCache;
if (SlidingCacheWrapper <T> .IsSlidingCache(cacheValue, out slidingCache))
{
//尝试以 SlidingCacheWrapper<T> 处理
var diffSpan = DateTime.Now.Subtract(slidingCache.SettingTime);
//当前时间-设置时间>滑动时间, 已经过期
if (diffSpan > slidingCache.SlidingExpiration)
{
Expire(key);
value = default(T);
return(false);
}
//当前时间-设置时间> 滑动时间/2, 更新缓存
if (diffSpan.Add(diffSpan) > slidingCache.SlidingExpiration)
{
Overwrite(key, slidingCache.Value, slidingCache.SlidingExpiration);
}
value = slidingCache.Value;
}
else
{
//尝试以普通JSON处理
value = NewtonsoftJsonUtil.EnsureObjectType <T>(cacheValue);
}
return(true);
}
public static Boolean IsSlidingCache(Object obj, out SlidingCacheWrapper <T> cacheEntry)
{
cacheEntry = null;
if (obj is SlidingCacheWrapper <T> )
{
cacheEntry = (SlidingCacheWrapper <T>)obj;
return(true);
}
if (obj is JObject)
{
var jobj = (JObject)obj;
if (jobj.Property(SlidingExpirationProp) != null && jobj.Property(SettingTimeProp) != null)
{
cacheEntry = jobj.ToObject <SlidingCacheWrapper <T> >();
return(true);
}
}
return(false);
}
