公司一直在用.net自带的缓存，大家都知道.net自带缓存的缺点，就不多说了，不知道的可以查一查，领导最近在说分布式缓存，我们选的是redis，领导让我不忙的时候封装一下，搜索了两天，选了选第三方的插件，ServiceStack.Redis和StackExchange.Redis以前都用过，不过都是别人封装好的，今天在往项目中整合的时候，我使用的ServiceStack.Redis版本不兼容.net 4.0，在网上找了一圈，ServiceStack.Redis对.net 4.0的支持用起来很麻烦，要改变系统引用的东西，最后放弃了，今天又拿NServiceKit.Redis重新封装了一下，下一篇在说NServiceKit.Redis。先说说ServiceStack.Redis，ServiceStack.Redis是Redis官方推荐的C#客户端，性能非常优越，使用也很方便，但是从v4版本已经逐渐商业化了，普通版每小时只能访问Redis 6000次，我没测试过，大家可以看看这篇文章http://blog.csdn.net/u010533180/article/details/52856586，所以我放弃了ServiceStack.Redis，选择了StackExchange.Redis，StackExchange.Redis也是开源的，这是地址：https://github.com/StackExchange/StackExchange.Redis，我使用的是.net 4.5，工具采用 vs2015， StackExchange.Redis版本是1.0.488。
对于与Redis连接的配置写法很简单，最简单的写法写个IP和端口就可以了，如你有其他想法自己去查资料吧。StackExchange.Redis中的核心是ConnectionMultiplexer，没事好研究研究。这里我只封装了对缓存的操作，以后可能会更新其他的。
先说说我的想法：
1.定义ICache接口。
2.Redis类和Memcached类，以后想用那个缓存修改一下配置就可以了，非常方便。
3.CacheHelper的实现。
上代码：
ICache.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks; namespace Common
{
public interface ICache
{
/// <summary>
/// 缓存过期时间
/// </summary>
int TimeOut { set; get; }
/// <summary>
/// 获得指定键的缓存值
/// </summary>
/// <param name="key">缓存键</param>
/// <returns>缓存值</returns>
object Get(string key);
/// <summary>
/// 获得指定键的缓存值
/// </summary>
T Get<T>(string key);
/// <summary>
/// 从缓存中移除指定键的缓存值
/// </summary>
/// <param name="key">缓存键</param>
void Remove(string key);
/// <summary>
/// 清空所有缓存对象
/// </summary>
//void Clear();
/// <summary>
/// 将指定键的对象添加到缓存中
/// </summary>
/// <param name="key">缓存键</param>
/// <param name="data">缓存值</param>
void Insert(string key, object data);
/// <summary>
/// 将指定键的对象添加到缓存中
/// </summary>
/// <param name="key">缓存键</param>
/// <param name="data">缓存值</param>
void Insert<T>(string key, T data);
/// <summary>
/// 将指定键的对象添加到缓存中，并指定过期时间
/// </summary>
/// <param name="key">缓存键</param>
/// <param name="data">缓存值</param>
/// <param name="cacheTime">缓存过期时间(秒钟)</param>
void Insert(string key, object data, int cacheTime); /// <summary>
/// 将指定键的对象添加到缓存中，并指定过期时间
/// </summary>
/// <param name="key">缓存键</param>
/// <param name="data">缓存值</param>
/// <param name="cacheTime">缓存过期时间(秒钟)</param>
void Insert<T>(string key, T data, int cacheTime);
/// <summary>
/// 将指定键的对象添加到缓存中，并指定过期时间
/// </summary>
/// <param name="key">缓存键</param>
/// <param name="data">缓存值</param>
/// <param name="cacheTime">缓存过期时间</param>
void Insert(string key, object data, DateTime cacheTime);
/// <summary>
/// 将指定键的对象添加到缓存中，并指定过期时间
/// </summary>
/// <param name="key">缓存键</param>
/// <param name="data">缓存值</param>
/// <param name="cacheTime">缓存过期时间</param>
void Insert<T>(string key, T data, DateTime cacheTime);
/// <summary>
/// 判断key是否存在
/// </summary>
bool Exists(string key);
}
}
Redis.cs
using Newtonsoft.Json;
using StackExchange.Redis;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Text;
using System.Threading.Tasks; namespace Common
{
public class Redis : ICache
{
int Default_Timeout = ;//默认超时时间（单位秒）
string address;
JsonSerializerSettings jsonConfig = new JsonSerializerSettings() { ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore, NullValueHandling = NullValueHandling.Ignore };
ConnectionMultiplexer connectionMultiplexer;
IDatabase database; class CacheObject<T>
{
public int ExpireTime { get; set; }
public bool ForceOutofDate { get; set; }
public T Value { get; set; }
} public Redis()
{
this.address = ConfigurationManager.AppSettings["RedisServer"]; if (this.address == null || string.IsNullOrWhiteSpace(this.address.ToString()))
throw new ApplicationException("配置文件中未找到RedisServer的有效配置");
connectionMultiplexer = ConnectionMultiplexer.Connect(address);
database = connectionMultiplexer.GetDatabase();
} /// <summary>
/// 连接超时设置
/// </summary>
public int TimeOut
{
get
{
return Default_Timeout;
}
set
{
Default_Timeout = value;
}
} public object Get(string key)
{
return Get<object>(key);
} public T Get<T>(string key)
{ DateTime begin = DateTime.Now;
var cacheValue = database.StringGet(key);
DateTime endCache = DateTime.Now;
var value = default(T);
if (!cacheValue.IsNull)
{
var cacheObject = JsonConvert.DeserializeObject<CacheObject<T>>(cacheValue, jsonConfig);
if (!cacheObject.ForceOutofDate)
database.KeyExpire(key, new TimeSpan(, , cacheObject.ExpireTime));
value = cacheObject.Value;
}
DateTime endJson = DateTime.Now;
return value; } public void Insert(string key, object data)
{
var jsonData = GetJsonData(data, TimeOut, false);
database.StringSet(key, jsonData);
} public void Insert(string key, object data, int cacheTime)
{
var timeSpan = TimeSpan.FromSeconds(cacheTime);
var jsonData = GetJsonData(data, TimeOut, true);
database.StringSet(key, jsonData, timeSpan);
} public void Insert(string key, object data, DateTime cacheTime)
{
var timeSpan = cacheTime - DateTime.Now;
var jsonData = GetJsonData(data, TimeOut, true);
database.StringSet(key, jsonData, timeSpan);
} public void Insert<T>(string key, T data)
{
var jsonData = GetJsonData<T>(data, TimeOut, false);
database.StringSet(key, jsonData);
} public void Insert<T>(string key, T data, int cacheTime)
{
var timeSpan = TimeSpan.FromSeconds(cacheTime);
var jsonData = GetJsonData<T>(data, TimeOut, true);
database.StringSet(key, jsonData, timeSpan);
} public void Insert<T>(string key, T data, DateTime cacheTime)
{
var timeSpan = cacheTime - DateTime.Now;
var jsonData = GetJsonData<T>(data, TimeOut, true);
database.StringSet(key, jsonData, timeSpan);
} string GetJsonData(object data, int cacheTime, bool forceOutOfDate)
{
var cacheObject = new CacheObject<object>() { Value = data, ExpireTime = cacheTime, ForceOutofDate = forceOutOfDate };
return JsonConvert.SerializeObject(cacheObject, jsonConfig);//序列化对象
} string GetJsonData<T>(T data, int cacheTime, bool forceOutOfDate)
{
var cacheObject = new CacheObject<T>() { Value = data, ExpireTime = cacheTime, ForceOutofDate = forceOutOfDate };
return JsonConvert.SerializeObject(cacheObject, jsonConfig);//序列化对象
}
/// <summary>
/// 删除
/// </summary>
/// <param name="key"></param>
public void Remove(string key)
{
database.KeyDelete(key, CommandFlags.HighPriority);
} /// <summary>
/// 判断key是否存在
/// </summary>
public bool Exists(string key)
{
return database.KeyExists(key);
} }
}
CacheHelper.cs
using System;
using System.Collections.Generic; namespace Common
{
/// <summary>
/// 缓存
/// </summary>
public static class Cache
{
private static object cacheLocker = new object();//缓存锁对象
private static ICache cache = null;//缓存接口 static Cache()
{
Load();
} /// <summary>
/// 加载缓存
/// </summary>
/// <exception cref=""></exception>
private static void Load()
{
try
{
cache = new Redis();
}
catch (Exception ex)
{
//Log.Error(ex.Message);
}
} public static ICache GetCache()
{
return cache;
} /// <summary>
/// 缓存过期时间
/// </summary>
public static int TimeOut
{
get
{
return cache.TimeOut;
}
set
{
lock (cacheLocker)
{
cache.TimeOut = value;
}
}
} /// <summary>
/// 获得指定键的缓存值
/// </summary>
/// <param name="key">缓存键</param>
/// <returns>缓存值</returns>
public static object Get(string key)
{
if (string.IsNullOrWhiteSpace(key))
return null;
return cache.Get(key);
} /// <summary>
/// 获得指定键的缓存值
/// </summary>
/// <param name="key">缓存键</param>
/// <returns>缓存值</returns>
public static T Get<T>(string key)
{
return cache.Get<T>(key);
} /// <summary>
/// 将指定键的对象添加到缓存中
/// </summary>
/// <param name="key">缓存键</param>
/// <param name="data">缓存值</param>
public static void Insert(string key, object data)
{
if (string.IsNullOrWhiteSpace(key) || data == null)
return;
//lock (cacheLocker)
{
cache.Insert(key, data);
}
}
/// <summary>
/// 将指定键的对象添加到缓存中
/// </summary>
/// <param name="key">缓存键</param>
/// <param name="data">缓存值</param>
public static void Insert<T>(string key, T data)
{
if (string.IsNullOrWhiteSpace(key) || data == null)
return;
//lock (cacheLocker)
{
cache.Insert<T>(key, data);
}
}
/// <summary>
/// 将指定键的对象添加到缓存中，并指定过期时间
/// </summary>
/// <param name="key">缓存键</param>
/// <param name="data">缓存值</param>
/// <param name="cacheTime">缓存过期时间(分钟)</param>
public static void Insert(string key, object data, int cacheTime)
{
if (!string.IsNullOrWhiteSpace(key) && data != null)
{
//lock (cacheLocker)
{
cache.Insert(key, data, cacheTime);
}
}
} /// <summary>
/// 将指定键的对象添加到缓存中，并指定过期时间
/// </summary>
/// <param name="key">缓存键</param>
/// <param name="data">缓存值</param>
/// <param name="cacheTime">缓存过期时间(分钟)</param>
public static void Insert<T>(string key, T data, int cacheTime)
{
if (!string.IsNullOrWhiteSpace(key) && data != null)
{
//lock (cacheLocker)
{
cache.Insert<T>(key, data, cacheTime);
}
}
} /// <summary>
/// 将指定键的对象添加到缓存中，并指定过期时间
/// </summary>
/// <param name="key">缓存键</param>
/// <param name="data">缓存值</param>
/// <param name="cacheTime">缓存过期时间</param>
public static void Insert(string key, object data, DateTime cacheTime)
{
if (!string.IsNullOrWhiteSpace(key) && data != null)
{
//lock (cacheLocker)
{
cache.Insert(key, data, cacheTime);
}
}
} /// <summary>
/// 将指定键的对象添加到缓存中，并指定过期时间
/// </summary>
/// <param name="key">缓存键</param>
/// <param name="data">缓存值</param>
/// <param name="cacheTime">缓存过期时间</param>
public static void Insert<T>(string key, T data, DateTime cacheTime)
{
if (!string.IsNullOrWhiteSpace(key) && data != null)
{
//lock (cacheLocker)
{
cache.Insert<T>(key, data, cacheTime);
}
}
} /// <summary>
/// 从缓存中移除指定键的缓存值
/// </summary>
/// <param name="key">缓存键</param>
public static void Remove(string key)
{
if (string.IsNullOrWhiteSpace(key))
return;
lock (cacheLocker)
{
cache.Remove(key);
}
} /// <summary>
/// 判断key是否存在
/// </summary>
public static bool Exists(string key)
{
return cache.Exists(key);
} }
}