Redis缓存服务搭建及实现数据读写
RedisHelper帮助类
/// <summary>
/// Redis 帮助类文件
/// </summary>
public class RedisHelper : IDisposable {
/// <summary>
/// 针对Log4net的实例
/// </summary>
private static readonly ILog Logger = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); /// <summary>
/// The seconds time out.
/// 默认缓存过期时间单位秒
/// </summary>
private int secondsTimeOut = * * ; /// <summary>
/// 给某个键对应的数据设置过期时间
/// </summary>
/// <param name="key">键</param>
/// <param name="seconds">过期时间</param>
public void Expire(string key, int seconds) {
try {
this.redis.Expire(key, seconds);
} catch(Exception ex) {
var message = string.Format("设置过期时间出错");
Logger.Error(message, ex);
}
} /// <summary>
/// 释放资源
/// </summary>
public void Dispose() {
if(this.redis != null) {
this.redis.Dispose();
this.redis = null;
} GC.Collect();
} private IEnumerable<string> SplitString(string strSource, string split) {
return strSource.Split(split.ToArray());
} /// <summary>
/// 设置单个实体
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key">缓存建</param>
/// <param name="t">缓存值</param>
/// <param name="timeout">过期时间，单位秒,-1：不过期，0：默认过期时间：一天</param>
public bool Set<T>(string key, T t, int timeout = -) {
try {
if(timeout >= ) {
if(timeout > ) {
this.secondsTimeOut = timeout;
} var dtTimeOut = DateTime.Now.AddSeconds(this.secondsTimeOut);
return this.redis.Set(key, t, dtTimeOut);
} return this.redis.Set(key, t);
} catch(Exception ex) {
string message = string.Format("设置Redis缓存出错");
Logger.Error(message, ex);
}
} /// <summary>
/// 获取单个实体
/// </summary>
/// <typeparam name="T">对象类型</typeparam>
/// <param name="key">键值</param>
public T Get<T>(string key) {
try {
return this.redis.Get<T>(key);
} catch(Exception ex) {
string message = string.Format("获取Redis缓存出错");
Logger.Error(message, ex);
}
} /// <summary>
/// 删除
/// </summary>
/// <param name="key">键值</param>
public bool Remove(string key) {
try {
return this.redis.Remove(key);
} catch(Exception ex) {
string message = string.Format("删除Redis缓存出错");
Logger.Error(message, ex);
}
} /// <summary>
/// 删除所有
/// </summary>
public void RemoveAll() {
var keyList = this.redis.GetAllKeys();
this.redis.RemoveAll(keyList);
} /// <summary>
/// 获取Redis的所有key
/// </summary>
public List<string> ListKey() {
return this.redis.GetAllKeys();
} /// <summary>
/// 添加一个对象
/// </summary>
/// <typeparam name="T">对象类型</typeparam>
/// <param name="key">键</param>
/// <param name="t"></param>
/// <param name="timeout">过期时间(单位为秒) -1：不过期，0：默认过期时间 一天</param>
public bool Add<T>(string key, T t, int timeout = -) {
try {
if(timeout >= ) {
if(timeout > ) {
this.secondsTimeOut = timeout;
} this.redis.Expire(key, this.secondsTimeOut);
} return this.redis.Add(key, t);
} catch(Exception ex) {
string message = string.Format("添加Redis缓存出错");
Logger.Error(message, ex);
}
} /// <summary>
/// 根据IEnumerable数据添加链表
/// </summary>
/// <typeparam name="T">对象类型</typeparam>
/// <param name="key">键</param>
/// <param name="values">值</param>
/// <param name="timeout">过期时间 -1：不过期，0：默认过期时间:一天</param>
public void AddList<T>(string key, IEnumerable<T> values, int timeout = -) {
try {
IRedisTypedClient<T> iredisClient = this.redis.As<T>();
IRedisList<T> redisList = iredisClient.Lists[key];
redisList.AddRange(values);
if(timeout > ) {
if(timeout > ) {
this.secondsTimeOut = timeout;
} this.redis.Expire(key, this.secondsTimeOut);
} iredisClient.Save();
} catch(Exception ex) {
string message = string.Format("添加链表出错");
Logger.Error(message, ex);
}
} /// <summary>
/// 添加单个实体到链表中
/// </summary>
/// <typeparam name="T">对象类型</typeparam>
/// <param name="key">键</param>
/// <param name="Item"></param>
/// <param name="timeout">过期时间 -1：不过期，0：默认过期时间：一天</param>
public void AddEntityToList<T>(string key, T Item, int timeout = -) {
try {
IRedisTypedClient<T> iredisClient = redis.As<T>();
IRedisList<T> redisList = iredisClient.Lists[key];
redisList.Add(Item);
iredisClient.Save();
if(timeout >= ) {
if(timeout > ) {
this.secondsTimeOut = timeout;
} this.redis.Expire(key, this.secondsTimeOut);
}
} catch(Exception ex) {
string message = string.Format("添加单个的实体到链表中出错");
Logger.Error(message, ex);
}
} /// <summary>
/// 获取链表
/// </summary>
/// <typeparam name="T">对象类型</typeparam>
/// <param name="key">键</param>
public IEnumerable<T> GetList<T>(string key) {
try {
IRedisTypedClient<T> iredisClient = redis.As<T>();
return iredisClient.Lists[key];
} catch(Exception ex) {
string message = string.Format("获取链表出错");
Logger.Error(message, ex);
}
} /// <summary>
/// 在链表中删除单个实体
/// </summary>
/// <typeparam name="T">对象类型</typeparam>
/// <param name="key">键</param>
public void RemoveEntityFromList<T>(string key, T t) {
try {
IRedisTypedClient<T> iredisClient = this.redis.As<T>();
IRedisList<T> redisList = iredisClient.Lists[key];
redisList.RemoveValue(t);
iredisClient.Save();
} catch(Exception ex) {
string message = string.Format("删除链表中的单个实体出错");
Logger.Error(message, ex);
}
} /// <summary>
/// 根据key移除整个链表
/// </summary>
/// <param name="key">键</param>
public void RemoveAllList<T>(string key) {
try {
IRedisTypedClient<T> iredisClient = this.redis.As<T>();
IRedisList<T> redisList = iredisClient.Lists[key];
redisList.RemoveAll();
iredisClient.Save();
} catch(Exception ex) {
string message = string.Format("删除链表集合");
Logger.Error(message, ex);
}
}
}本文出自GitHub开源网站
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asp.net mvc 用Redis实现分布式集群共享Session
1、这两天研究Redis搞分布式session问题，网上找的资料都是用ServiceStack.Redis来实现的，但是在做性能测试的时候 发现最新的v4版本有限制每小时候最多请求6000次，因为官网开始商业化要收费了，好坑爹的说，还好我前期弄了个性能测试列子，不然上线以后出问题那就 麻烦了。后面找了个NServiceKit.Redis（好像就是ServiceStack.Redis的v3版本）来替代v4的收费版。
2、解决方案是 Redis+cookie方式实现记录用户登录状态
cookie：存放用户的ID，这个ID是经过加密的，并且后台可以通过密钥解密。
Redis：key/value 方式存储，key存放比如：user_1。 value存放用户实体对象。
3、先安装一个Redis，windows的版本在本地进行测试，后期上线更换linux系统的Redis替换一下ip就可以了。
4、添加一个Session管理类
public class SessionHelper
{
private const int secondsTimeOut = * ; //默认过期时间20分钟 单位秒 public RedisHelper Redis = new RedisHelper(false);
public LoginUserInfo this[string key]
{
get
{
string webCookie = WebHelper.GetCookie(key);
if (webCookie == "")
{
return null;
}
key = key + "_" + SecureHelper.AESDecrypt(webCookie); //距离过期时间还有多少秒
long l = Redis.TTL(key);
if (l >= )
{
Redis.Expire(key, secondsTimeOut);
} return Redis.Get<LoginUserInfo>(key);
}
set
{
SetSession(key, value);
}
}
public void SetSession(string key, LoginUserInfo value)
{
if (string.IsNullOrWhiteSpace(key))
{
throw new Exception("Key is Null or Epmty");
}
WebHelper.SetCookie(key, SecureHelper.AESEncrypt(value.ID.ToString()));
key = key + "_" + value.ID;
Redis.Set<LoginUserInfo>(key, value, secondsTimeOut);
} /// <summary>
/// 移除Session
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public bool Remove(string key)
{
var rs = Redis.Remove(key + "_" + SecureHelper.AESDecrypt(WebHelper.GetCookie(key)));
WebHelper.DeleteCookie(key);
return rs;
} }
SessionHelper
5、Redis操作类
public class RedisHelper : IDisposable
{
private RedisClient Redis = new RedisClient("127.0.0.1", );
//缓存池
PooledRedisClientManager prcm = new PooledRedisClientManager(); //默认缓存过期时间单位秒
public int secondsTimeOut = * ; /// <summary>
/// 缓冲池
/// </summary>
/// <param name="readWriteHosts"></param>
/// <param name="readOnlyHosts"></param>
/// <returns></returns>
public static PooledRedisClientManager CreateManager(string[] readWriteHosts, string[] readOnlyHosts)
{
return new PooledRedisClientManager(readWriteHosts, readOnlyHosts,
new RedisClientManagerConfig
{
MaxWritePoolSize = readWriteHosts.Length * ,
MaxReadPoolSize = readOnlyHosts.Length * ,
AutoStart = true,
});
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="OpenPooledRedis">是否开启缓冲池</param>
public RedisHelper(bool OpenPooledRedis = false)
{ if (OpenPooledRedis)
{
prcm = CreateManager(new string[] { "127.0.0.1:6379" }, new string[] { "127.0.0.1:6379" });
Redis = prcm.GetClient() as RedisClient;
}
}
/// <summary>
/// 距离过期时间还有多少秒
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public long TTL(string key)
{
return Redis.Ttl(key);
}
/// <summary>
/// 设置过期时间
/// </summary>
/// <param name="key"></param>
/// <param name="timeout"></param>
public void Expire(string key,int timeout = )
{
if (timeout >= )
{
if (timeout > )
{
secondsTimeOut = timeout;
}
Redis.Expire(key, secondsTimeOut);
}
} #region Key/Value存储
/// <summary>
/// 设置缓存
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key">缓存建</param>
/// <param name="t">缓存值</param>
/// <param name="timeout">过期时间，单位秒,-1：不过期，0：默认过期时间</param>
/// <returns></returns>
public bool Set<T>(string key, T t, int timeout = )
{
Redis.Set<T>(key, t);
if (timeout >= )
{
if (timeout > )
{
secondsTimeOut = timeout;
}
Redis.Expire(key, secondsTimeOut);
}
return true; }
/// <summary>
/// 获取
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <returns></returns>
public T Get<T>(string key)
{
return Redis.Get<T>(key);
}
/// <summary>
/// 删除
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public bool Remove(string key)
{
return Redis.Remove(key);
}
#endregion //释放资源
public void Dispose()
{
if (Redis != null)
{
Redis.Dispose();
Redis = null;
}
GC.Collect(); }
}
RedisHelper
用C#封装的ServiceStack.redis操作类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ServiceStack.Redis;
namespace TestRedis
{
class RedisHelper:IDisposable
{
/*copyright@2013 All Rights Reserved
* Author:Mars
* Date:2013.08.27
* QQ:258248340
* servicestack.redis为github中的开源项目
* redis是一个典型的k/v型数据库
* redis共支持五种类型的数据 string,list,hash,set,sortedset
*
* string是最简单的字符串类型
*
* list是字符串列表，其内部是用双向链表实现的，因此在获取/设置数据时可以支持正负索引
* 也可以将其当做堆栈结构使用
*
* hash类型是一种字典结构，也是最接近RDBMS的数据类型，其存储了字段和字段值的映射，但字段值只能是
* 字符串类型，散列类型适合存储对象，建议使用对象类别和ID构成键名，使用字段表示对象属性，字
* 段值存储属性值，例如：car:2 price 500 ,car:2 color black,用redis命令设置散列时，命令格式
* 如下：HSET key field value，即key，字段名，字段值
*
* set是一种集合类型，redis中可以对集合进行交集，并集和互斥运算
*
* sorted set是在集合的基础上为每个元素关联了一个“分数”，我们能够
* 获得分数最高的前N个元素，获得指定分数范围内的元素，元素是不同的，但是"分数"可以是相同的
* set是用散列表和跳跃表实现的，获取数据的速度平均为o(log(N))
*
* 需要注意的是，redis所有数据类型都不支持嵌套
* redis中一般不区分插入和更新操作，只是命令的返回值不同
* 在插入key时，如果不存在，将会自动创建
*
* 在实际生产环境中，由于多线程并发的关系，建议使用连接池，本类只是用于测试简单的数据类型
*/ /*
* 以下方法为基本的设置数据和取数据
*/
private static RedisClient redisCli = null;
/// <summary>
/// 建立redis长连接
/// </summary>
/// 将此处的IP换为自己的redis实例IP，如果设有密码，第三个参数为密码，string 类型
public static void CreateClient(string hostIP,int port,string keyword)
{
if (redisCli == null)
{
redisCli = new RedisClient(hostIP, port, keyword);
} }
public static void CreateClient(string hostIP, int port)
{
if (redisCli == null)
{
redisCli = new RedisClient(hostIP, port);
} }
//private static RedisClient redisCli = new RedisClient("192.168.101.165", 6379, "123456");
/// <summary>
/// 获取key,返回string格式
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public static string getValueString(string key)
{ string value = redisCli.GetValue(key);
return value; }
/// <summary>
/// 获取key,返回byte[]格式
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public static byte[] getValueByte(string key)
{
byte[] value = redisCli.Get(key);
return value;
}
/// <summary>
/// 获得某个hash型key下的所有字段
/// </summary>
/// <param name="hashId"></param>
/// <returns></returns>
public static List<string> GetHashFields(string hashId)
{
List<string> hashFields = redisCli.GetHashKeys(hashId);
return hashFields;
}
/// <summary>
/// 获得某个hash型key下的所有值
/// </summary>
/// <param name="hashId"></param>
/// <returns></returns>
public static List<string> GetHashValues(string hashId)
{
List<string> hashValues = redisCli.GetHashKeys(hashId);
return hashValues;
}
/// <summary>
/// 获得hash型key某个字段的值
/// </summary>
/// <param name="key"></param>
/// <param name="field"></param>
public static string GetHashField(string key, string field)
{
string value = redisCli.GetValueFromHash(key, field);
return value;
}
/// <summary>
/// 设置hash型key某个字段的值
/// </summary>
/// <param name="key"></param>
/// <param name="field"></param>
/// <param name="value"></param>
public static void SetHashField(string key, string field, string value)
{
redisCli.SetEntryInHash(key, field, value);
}
/// <summary>
///使某个字段增加
/// </summary>
/// <param name="key"></param>
/// <param name="field"></param>
/// <returns></returns>
public static void SetHashIncr(string key, string field, long incre)
{
redisCli.IncrementValueInHash(key, field, incre); }
/// <summary>
/// 向list类型数据添加成员，向列表底部(右侧)添加
/// </summary>
/// <param name="Item"></param>
/// <param name="list"></param>
public static void AddItemToListRight(string list, string item)
{
redisCli.AddItemToList(list, item);
}
/// <summary>
/// 向list类型数据添加成员，向列表顶部(左侧)添加
/// </summary>
/// <param name="list"></param>
/// <param name="item"></param>
public static void AddItemToListLeft(string list, string item)
{
redisCli.LPush(list, Encoding.Default.GetBytes(item));
}
/// <summary>
/// 从list类型数据读取所有成员
/// </summary>
public static List<string> GetAllItems(string list)
{
List<string> listMembers = redisCli.GetAllItemsFromList(list);
return listMembers;
}
/// <summary>
/// 从list类型数据指定索引处获取数据，支持正索引和负索引
/// </summary>
/// <param name="list"></param>
/// <returns></returns>
public static string GetItemFromList(string list, int index)
{
string item = redisCli.GetItemFromList(list, index);
return item;
}
/// <summary>
/// 向列表底部（右侧）批量添加数据
/// </summary>
/// <param name="list"></param>
/// <param name="values"></param>
public static void GetRangeToList(string list, List<string> values)
{
redisCli.AddRangeToList(list, values);
}
/// <summary>
/// 向集合中添加数据
/// </summary>
/// <param name="item"></param>
/// <param name="set"></param>
public static void GetItemToSet(string item, string set)
{
redisCli.AddItemToSet(item, set);
}
/// <summary>
/// 获得集合中所有数据
/// </summary>
/// <param name="set"></param>
/// <returns></returns>
public static HashSet<string> GetAllItemsFromSet(string set)
{
HashSet<string> items = redisCli.GetAllItemsFromSet(set);
return items;
}
/// <summary>
/// 获取fromSet集合和其他集合不同的数据
/// </summary>
/// <param name="fromSet"></param>
/// <param name="toSet"></param>
/// <returns></returns>
public static HashSet<string> GetSetDiff(string fromSet, params string[] toSet)
{
HashSet<string> diff = redisCli.GetDifferencesFromSet(fromSet, toSet);
return diff;
}
/// <summary>
/// 获得所有集合的并集
/// </summary>
/// <param name="set"></param>
/// <returns></returns>
public static HashSet<string> GetSetUnion(params string[] set)
{
HashSet<string> union = redisCli.GetUnionFromSets(set);
return union;
}
/// <summary>
/// 获得所有集合的交集
/// </summary>
/// <param name="set"></param>
/// <returns></returns>
public static HashSet<string> GetSetInter(params string[] set)
{
HashSet<string> inter = redisCli.GetIntersectFromSets(set);
return inter;
}
/// <summary>
/// 向有序集合中添加元素
/// </summary>
/// <param name="set"></param>
/// <param name="value"></param>
/// <param name="score"></param>
public static void AddItemToSortedSet(string set,string value,long score)
{
redisCli.AddItemToSortedSet(set,value,score);
}
/// <summary>
/// 获得某个值在有序集合中的排名，按分数的降序排列
/// </summary>
/// <param name="set"></param>
/// <param name="value"></param>
/// <returns></returns>
public static int GetItemIndexInSortedSetDesc(string set, string value)
{
int index = redisCli.GetItemIndexInSortedSetDesc(set, value);
return index;
}
/// <summary>
/// 获得某个值在有序集合中的排名，按分数的升序排列
/// </summary>
/// <param name="set"></param>
/// <param name="value"></param>
/// <returns></returns>
public static int GetItemIndexInSortedSet(string set, string value)
{
int index = redisCli.GetItemIndexInSortedSet(set, value);
return index;
}
/// <summary>
/// 获得有序集合中某个值得分数
/// </summary>
/// <param name="set"></param>
/// <param name="value"></param>
/// <returns></returns>
public static double GetItemScoreInSortedSet(string set, string value)
{
double score = redisCli.GetItemScoreInSortedSet(set, value);
return score;
}
/// <summary>
/// 获得有序集合中，某个排名范围的所有值
/// </summary>
/// <param name="set"></param>
/// <param name="beginRank"></param>
/// <param name="endRank"></param>
/// <returns></returns>
public static List<string> GetRangeFromSortedSet(string set,int beginRank, int endRank)
{
List<string> valueList=redisCli.GetRangeFromSortedSet(set,beginRank,endRank);
return valueList;
}
/// <summary>
/// 获得有序集合中，某个分数范围内的所有值，升序
/// </summary>
/// <param name="set"></param>
/// <param name="beginScore"></param>
/// <param name="endScore"></param>
/// <returns></returns>
public static List<string> GetRangeFromSortedSet(string set, double beginScore, double endScore)
{
List<string> valueList = redisCli.GetRangeFromSortedSetByHighestScore(set, beginScore, endScore);
return valueList;
}
/// <summary>
/// 获得有序集合中，某个分数范围内的所有值，降序
/// </summary>
/// <param name="set"></param>
/// <param name="beginScore"></param>
/// <param name="endScore"></param>
/// <returns></returns>
public static List<string> GetRangeFromSortedSetDesc(string set, double beginScore, double endScore)
{
List<string> vlaueList=redisCli.GetRangeFromSortedSetByLowestScore(set,beginScore,endScore);
return vlaueList;
}
public void Dispose()
{
redisCli.Dispose();
} }
}
RedisHelper
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