namespace Nop.Core.Caching { /// <summary> /// Cache manager interface /// </summary> public interface ICacheManager { /// <summary> /// Gets or sets the value associated with the specified key. /// </summary> /// <typeparam name="T">Type</typeparam> /// <param name="key">The key of the value to get.</param> /// <returns>The value associated with the specified key.</returns> T Get<T>(string key); /// <summary> /// Adds the specified key and object to the cache. /// </summary> /// <param name="key">key</param> /// <param name="data">Data</param> /// <param name="cacheTime">Cache time</param> void Set(string key, object data, int cacheTime); /// <summary> /// Gets a value indicating whether the value associated with the specified key is cached /// </summary> /// <param name="key">key</param> /// <returns>Result</returns> bool IsSet(string key); /// <summary> /// Removes the value with the specified key from the cache /// </summary> /// <param name="key">/key</param> void Remove(string key); /// <summary> /// Removes items by pattern /// </summary> /// <param name="pattern">pattern</param> void RemoveByPattern(string pattern); /// <summary> /// Clear all cache data /// </summary> void Clear(); } }
namespace Nop.Core.Caching { /// <summary> /// Represents a NopNullCache /// </summary> public partial class NopNullCache : ICacheManager { /// <summary> /// Gets or sets the value associated with the specified key. /// </summary> /// <typeparam name="T">Type</typeparam> /// <param name="key">The key of the value to get.</param> /// <returns>The value associated with the specified key.</returns> public T Get<T>(string key) { return default(T); } /// <summary> /// Adds the specified key and object to the cache. /// </summary> /// <param name="key">key</param> /// <param name="data">Data</param> /// <param name="cacheTime">Cache time</param> public void Set(string key, object data, int cacheTime) { } /// <summary> /// Gets a value indicating whether the value associated with the specified key is cached /// </summary> /// <param name="key">key</param> /// <returns>Result</returns> public bool IsSet(string key) { return false; } /// <summary> /// Removes the value with the specified key from the cache /// </summary> /// <param name="key">/key</param> public void Remove(string key) { } /// <summary> /// Removes items by pattern /// </summary> /// <param name="pattern">pattern</param> public void RemoveByPattern(string pattern) { } /// <summary> /// Clear all cache data /// </summary> public void Clear() { } } }
using System; using System.Collections.Generic; using System.Runtime.Caching; using System.Text.RegularExpressions; namespace Nop.Core.Caching { /// <summary> /// Represents a MemoryCacheCache /// </summary> public partial class MemoryCacheManager : ICacheManager { protected ObjectCache Cache { get { return MemoryCache.Default; } } /// <summary> /// Gets or sets the value associated with the specified key. /// </summary> /// <typeparam name="T">Type</typeparam> /// <param name="key">The key of the value to get.</param> /// <returns>The value associated with the specified key.</returns> public T Get<T>(string key) { return (T)Cache[key]; } /// <summary> /// Adds the specified key and object to the cache. /// </summary> /// <param name="key">key</param> /// <param name="data">Data</param> /// <param name="cacheTime">Cache time</param> public void Set(string key, object data, int cacheTime) { if (data == null) return; var policy = new CacheItemPolicy(); policy.AbsoluteExpiration = DateTime.Now + TimeSpan.FromMinutes(cacheTime); Cache.Add(new CacheItem(key, data), policy); } /// <summary> /// Gets a value indicating whether the value associated with the specified key is cached /// </summary> /// <param name="key">key</param> /// <returns>Result</returns> public bool IsSet(string key) { return (Cache.Contains(key)); } /// <summary> /// Removes the value with the specified key from the cache /// </summary> /// <param name="key">/key</param> public void Remove(string key) { Cache.Remove(key); } /// <summary> /// Removes items by pattern /// </summary> /// <param name="pattern">pattern</param> public void RemoveByPattern(string pattern) { var regex = new Regex(pattern, RegexOptions.Singleline | RegexOptions.Compiled | RegexOptions.IgnoreCase); var keysToRemove = new List<String>(); foreach (var item in Cache) if (regex.IsMatch(item.Key)) keysToRemove.Add(item.Key); foreach (string key in keysToRemove) { Remove(key); } } /// <summary> /// Clear all cache data /// </summary> public void Clear() { foreach (var item in Cache) Remove(item.Key); } } }
using System; using System.Collections; using System.Collections.Generic; using System.Text.RegularExpressions; using System.Web; namespace Nop.Core.Caching { /// <summary> /// Represents a NopStaticCache /// </summary> public partial class PerRequestCacheManager : ICacheManager { private readonly HttpContextBase _context; /// <summary> /// Ctor /// </summary> /// <param name="context">Context</param> public PerRequestCacheManager(HttpContextBase context) { this._context = context; } /// <summary> /// Creates a new instance of the NopRequestCache class /// </summary> protected IDictionary GetItems() { if (_context != null) return _context.Items; return null; } /// <summary> /// Gets or sets the value associated with the specified key. /// </summary> /// <typeparam name="T">Type</typeparam> /// <param name="key">The key of the value to get.</param> /// <returns>The value associated with the specified key.</returns> public T Get<T>(string key) { var items = GetItems(); if (items == null) return default(T); return (T)items[key]; } /// <summary> /// Adds the specified key and object to the cache. /// </summary> /// <param name="key">key</param> /// <param name="data">Data</param> /// <param name="cacheTime">Cache time</param> public void Set(string key, object data, int cacheTime) { var items = GetItems(); if (items == null) return; if (data != null) { if (items.Contains(key)) items[key] = data; else items.Add(key, data); } } /// <summary> /// Gets a value indicating whether the value associated with the specified key is cached /// </summary> /// <param name="key">key</param> /// <returns>Result</returns> public bool IsSet(string key) { var items = GetItems(); if (items == null) return false; return (items[key] != null); } /// <summary> /// Removes the value with the specified key from the cache /// </summary> /// <param name="key">/key</param> public void Remove(string key) { var items = GetItems(); if (items == null) return; items.Remove(key); } /// <summary> /// Removes items by pattern /// </summary> /// <param name="pattern">pattern</param> public void RemoveByPattern(string pattern) { var items = GetItems(); if (items == null) return; var enumerator = items.GetEnumerator(); var regex = new Regex(pattern, RegexOptions.Singleline | RegexOptions.Compiled | RegexOptions.IgnoreCase); var keysToRemove = new List<String>(); while (enumerator.MoveNext()) { if (regex.IsMatch(enumerator.Key.ToString())) { keysToRemove.Add(enumerator.Key.ToString()); } } foreach (string key in keysToRemove) { items.Remove(key); } } /// <summary> /// Clear all cache data /// </summary> public void Clear() { var items = GetItems(); if (items == null) return; var enumerator = items.GetEnumerator(); var keysToRemove = new List<String>(); while (enumerator.MoveNext()) { keysToRemove.Add(enumerator.Key.ToString()); } foreach (string key in keysToRemove) { items.Remove(key); } } } }
using System; namespace Nop.Core.Caching { /// <summary> /// Extensions /// </summary> public static class CacheExtensions { public static T Get<T>(this ICacheManager cacheManager, string key, Func<T> acquire) { return Get(cacheManager, key, 60, acquire); } public static T Get<T>(this ICacheManager cacheManager, string key, int cacheTime, Func<T> acquire) { if (cacheManager.IsSet(key)) { return cacheManager.Get<T>(key); } else { var result = acquire(); //if (result != null) cacheManager.Set(key, result, cacheTime); return result; } } } }
二、插件
http://www.cnblogs.com/haoxinyue/archive/2013/06/06/3105541.html