/// <summary>
/// Formats the concatenation of the cache tag
/// </summary>
/// <param name="type"></param>
/// <param name="identifier"></param>
/// <returns></returns>
public static string FormatTag(CacheTags type, dynamic identifier)
{
if (identifier == null)
{
identifier = "null";
}
string id = type.ToString() + identifier.ToString();
return(id);
}
public string GetUrlForFileAttribute(int fieldId)
{
return(_cacheProvider.GetOrAdd($"DBConnectorProxy.GetUrlForFileAttribute_{fieldId}",
CacheTags.Merge(CacheTags.QP8.Site, CacheTags.QP8.Field),
TimeSpan.FromMinutes(10),
() =>
{
return GetConnector().GetUrlForFileAttribute(fieldId);
}));
}
/// <summary>Expire all cached keys linked to specified tags.</summary>
/// <param name="tags">
/// A variable-length parameters list containing tag to expire linked cache
/// key.
/// </param>
public static void ExpireTag(params string[] tags)
{
foreach (var tag in tags)
{
List <string> list;
if (CacheTags.TryRemove(CachePrefix + tag, out list))
{
foreach (var item in list)
{
Cache.Remove(item);
}
}
}
}
/// <summary>Adds cache tags corresponding to a cached key in the CacheTags dictionary.</summary>
/// <param name="cacheKey">The cache key.</param>
/// <param name="tags">A variable-length parameters list containing tags corresponding to the <paramref name="cacheKey" />.</param>
internal static void AddCacheTag(string cacheKey, params string[] tags)
{
foreach (var tag in tags)
{
CacheTags.AddOrUpdate(CachePrefix + tag, x => new List <string> {
cacheKey
}, (x, list) =>
{
if (!list.Contains(cacheKey))
{
list.Add(cacheKey);
}
return(list);
});
}
}
/// <summary>Expire all cached keys linked to specified tags.</summary>
/// <param name="tags">
/// A variable-length parameters list containing tag to expire linked cache
/// key.
/// </param>
public static void ExpireTag(params string[] tags)
{
foreach (var tag in tags)
{
List <string> list;
if (CacheTags.TryRemove(CachePrefix + tag, out list))
{
// never lock something related to this list elsewhere or ensure we don't create a deadlock
lock (list)
{
foreach (var item in list)
{
Cache.Remove(item);
}
}
}
}
}
/// <summary>Adds cache tags corresponding to a cached key in the CacheTags dictionary.</summary>
/// <param name="cacheKey">The cache key.</param>
/// <param name="tags">A variable-length parameters list containing tags corresponding to the <paramref name="cacheKey" />.</param>
internal static void AddCacheTag(string cacheKey, params string[] tags)
{
foreach (var tag in tags)
{
CacheTags.AddOrUpdate(CachePrefix + tag, x => new List <string> {
cacheKey
}, (x, list) =>
{
lock (list)
{
// never lock something related to this list elsewhere or ensure we don't create a deadlock
if (!list.Contains(cacheKey))
{
list.Add(cacheKey);
}
}
return(list);
});
}
}
/// <summary>Expire all cached objects && tag.</summary>
public static void ExpireAll()
{
var tags = CacheTags.Select(x => x.Key).ToList();
// We do not use ExpireTag because type doesn't have CachePrefix
foreach (var tag in tags)
{
List <string> list;
if (CacheTags.TryRemove(tag, out list))
{
// never lock something related to this list elsewhere or ensure we don't create a deadlock
lock (list)
{
foreach (var item in list)
{
Cache.Remove(item);
}
}
}
}
}
public static void demo_cache3()
{
DbContext db = DbConfig.pc_bcf;
ICacheServiceEx cache = null;
//1.缓存并添加简易标签
db.call("user_get").set("xxx", 1)
.caching(cache)
.cacheTag("user_" + 1)
.usingCache(60 * 1000)
.getItem(new UserInfoModel());
CacheTags tags = new CacheTags(cache);
//2.1.可根据标签清除缓存
tags.clear("user_" + 1);
//2.2.可根据标签更新缓存
tags.update <UserInfoModel>("user_" + 1, (m) => {
m.name = "xxx";
return(m);
});
}
/// <summary>
/// Clears all the items with this tag
/// </summary>
/// <param name="tag"></param>
public void ClearTag(CacheTags cacheTag, dynamic id)
{
if (id == null)
{
id = "";
}
string tag = cacheTag.ToString() + id;
var keysToRemove = new List <string>();
foreach (DictionaryEntry item in System.Web.HttpRuntime.Cache)
{
if (!(item.Value is ICachable))
{
continue;
}
var key = (ICachable)item.Value;
if (key.Tags.Contains(tag))
{
keysToRemove.Add(item.Key.ToString());
}
}
// Remove each
foreach (var cacheKey in keysToRemove)
{
try
{
if (System.Web.HttpRuntime.Cache[cacheKey] != null)
{
System.Web.HttpRuntime.Cache.Remove(cacheKey);
}
}
catch
{
}
}
}
/// <summary>
/// Assigns this identifier to the tags property of the cache item
/// </summary>
/// <param name="cache"></param>
/// <param name="type"></param>
/// <param name="identifier"></param>
public static void AddTag(this ICachable cache, CacheTags type, dynamic identifier)
{
cache.Tags.Add(FormatTag(type, identifier));
}
public void ClearTag(CacheTags tag, dynamic id)
{
}
