public void AddOrReplace(string key, object value)
{
Ensure.StringArgumentNotNullAndNotEmpty(key, nameof(key));
Ensure.ArgumentNotNull(value, nameof(value));
System.Runtime.Caching.CacheItem item = new System.Runtime.Caching.CacheItem(key, value);
System.Runtime.Caching.CacheItemPolicy policy = new System.Runtime.Caching.CacheItemPolicy();
policy.RemovedCallback = x => OnCacheItemRemoved(new CacheItemRemovedEventArgs(x.CacheItem.Key, x.CacheItem.Value));
cache.Set(item, policy);
}
public T Set <T>(string key, CacheInfo <T> cache) where T : class
{
var oldCache = _cache.Get(key);
var cacheItem = new System.Runtime.Caching.CacheItem(key, cache.Value);
var policy = new System.Runtime.Caching.CacheItemPolicy();
policy.SlidingExpiration = cache.SlidingExpiration;
_cache.Set(cacheItem, policy);
return(oldCache == null ? null : (T)oldCache);
}
public bool AddItem(System.Runtime.Caching.CacheItem item, int seconds = -1)
{
if (seconds > 0)
{
TimeSpan ts = new TimeSpan(seconds * 1000);
return(client.Store(StoreMode.Add, item.Key, item.Value, ts));
}
else
{
return(client.Store(StoreMode.Add, item.Key, item.Value));
}
}
/// <summary>
/// 获取数据缓存
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="CacheKey">键</param>
/// lamda表达式:可以是() => new BLL.CangFangList().Single(CangFangId)或者() => "abc"
/// 或者委托(注意返回)： delegate() { return new BLL.CangFangList().Single(CangFangId); }
/// <param name="slidingExpiration">用于设置可调过期时间，它表示当离最后访问超过某个时间段后就过期new TimeSpan(0, 10, 0)或者TimeSpan.FromMinutes(60)</param>
/// <param name="absoluteExpiration">用于设置绝对过期时间,System.DateTime.Now.AddMinutes(20)</param>
/// <returns></returns>
public static T GetCache <T>(string CacheKey, Func <T> cachePopulate, TimeSpan slidingExpiration, DateTime absoluteExpiration)
{
System.Web.Caching.Cache objCache = HttpRuntime.Cache;
object objObject = objCache[CacheKey];
if (objObject == null)
{
var item = new System.Runtime.Caching.CacheItem(CacheKey, cachePopulate());
SetCache(CacheKey, item, absoluteExpiration, slidingExpiration);
}
return((T)objCache[CacheKey]);
}
public CacheEntryRemovedArguments(ObjectCache source, CacheEntryRemovedReason reason, System.Runtime.Caching.CacheItem cacheItem)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (cacheItem == null)
{
throw new ArgumentNullException("cacheItem");
}
this._source = source;
this._reason = reason;
this._cacheItem = cacheItem;
}
public CacheEntryRemovedArguments(ObjectCache source, CacheEntryRemovedReason reason, System.Runtime.Caching.CacheItem cacheItem)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (cacheItem == null)
{
throw new ArgumentNullException("cacheItem");
}
this._source = source;
this._reason = reason;
this._cacheItem = cacheItem;
}
public void AddOrReplace(string key, object value, TimeSpan timeout)
{
Ensure.StringArgumentNotNullAndNotEmpty(key, nameof(key));
Ensure.ArgumentNotNull(value, nameof(value));
System.Runtime.Caching.CacheItem item = new System.Runtime.Caching.CacheItem(key, value);
System.Runtime.Caching.CacheItemPolicy policy = new System.Runtime.Caching.CacheItemPolicy();
policy.SlidingExpiration = timeout;
// Set non-removable flag to prevent cache item removals due to other reasonse apart from the timeout. e.g. low memory
policy.Priority = System.Runtime.Caching.CacheItemPriority.NotRemovable;
policy.RemovedCallback = x => OnCacheItemRemoved(new CacheItemRemovedEventArgs(x.CacheItem.Key, x.CacheItem.Value));
cache.Set(item, policy);
}
void ICache.Set(string key, CacheInfo cache)
{
var cacheItem = new System.Runtime.Caching.CacheItem(key, cache.Value);
var policy = new System.Runtime.Caching.CacheItemPolicy();
if (cache.AbsoluteExpiration.Ticks > 0)
{
policy.AbsoluteExpiration = cache.AbsoluteExpiration;
}
if (cache.SlidingExpiration.Ticks > 0)
{
policy.SlidingExpiration = cache.SlidingExpiration;
}
_cache.Set(cacheItem, policy);
}
/// <summary>
/// 添加缓存
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
/// <param name="expiry">过期时间</param>
/// <returns></returns>
public bool Add(string key, object value, TimeSpan?expiry = null)
{
#if net40
var cachePolicy = new System.Runtime.Caching.CacheItemPolicy();
if (expiry.HasValue)
{
cachePolicy.AbsoluteExpiration = DateTimeOffset.Now.Add(expiry.Value);
}
var item = new System.Runtime.Caching.CacheItem(key, value);
Cache.Set(item, cachePolicy);
#endif
#if netstandard2_0
using (var entry = Cache.CreateEntry(key))
{
entry.Value = value;
entry.AbsoluteExpirationRelativeToNow = expiry;
}
#endif
return(true);
}
/// <summary>
/// 获取数据缓存
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="CacheKey">缓存名称</param>
/// <param name="cachePopulate">
/// lamda表达式:可以是() => new BLL.CangFangList().Single(CangFangId)或者() => "abc"
/// 或者委托(注意返回)： delegate() { return new BLL.CangFangList().Single(CangFangId); }
/// </param>
/// <param name="slidingExpiration">用于设置可调过期时间，它表示当离最后访问超过某个时间段后就过期new TimeSpan(0, 10, 0)或者TimeSpan.FromMinutes(60)</param>
/// <remarks>
/// var value = CoreHelper.CacheHelper.GetCache<List<Model.S_MenuList>>
/// (
/// string.Format("menu{0}", currentUser.Id)
/// ,()=>new BLL.S_MenuList().Fetch()
/// , TimeSpan.FromMinutes(60)
/// );
/// </remarks>
/// <returns></returns>
public static T GetCache <T>(string CacheKey, Func <T> cachePopulate, TimeSpan slidingExpiration)
{
if (String.IsNullOrWhiteSpace(CacheKey))
{
throw new ArgumentException("无效的缓存键");
}
if (cachePopulate == null)
{
throw new ArgumentNullException("缓存填充");
}
System.Web.Caching.Cache objCache = HttpRuntime.Cache;
object objObject = objCache[CacheKey];
if (objObject == null)
{
lock (_locker)
{
var item = new System.Runtime.Caching.CacheItem(CacheKey, cachePopulate());
SetCache(CacheKey, item.Value, slidingExpiration);
}
}
return((T)objCache[CacheKey]);
}
public override void Set(System.Runtime.Caching.CacheItem item, System.Runtime.Caching.CacheItemPolicy policy)
{
}
public override System.Runtime.Caching.CacheItem AddOrGetExisting(System.Runtime.Caching.CacheItem item, System.Runtime.Caching.CacheItemPolicy policy)
{
throw null;
}
public override bool Add(System.Runtime.Caching.CacheItem item, System.Runtime.Caching.CacheItemPolicy policy)
{
throw null;
}
public abstract void Set(System.Runtime.Caching.CacheItem item, System.Runtime.Caching.CacheItemPolicy policy);
public virtual bool Add(System.Runtime.Caching.CacheItem item, System.Runtime.Caching.CacheItemPolicy policy)
{
throw null;
}
public abstract System.Runtime.Caching.CacheItem AddOrGetExisting(System.Runtime.Caching.CacheItem value, System.Runtime.Caching.CacheItemPolicy policy);
public bool DelItem(System.Runtime.Caching.CacheItem item)
{
return(client.Remove(item.Key));
}
public CacheEntryRemovedArguments(System.Runtime.Caching.ObjectCache source, System.Runtime.Caching.CacheEntryRemovedReason reason, System.Runtime.Caching.CacheItem cacheItem)
{
}
public bool UpdateItem(System.Runtime.Caching.CacheItem item)
{
return(client.Store(StoreMode.Replace, item.Key, item.Value));
}
