RedisHelper (C#)
作者：互联网
<add key="RedisServers" value="172.20.2.90:9379,password=Aa+123456789" />
using StackExchange.Redis;
using System;
using System.Collections.Generic;
using System.Linq;
namespace APP.Common
{
/// <summary>
/// StackExchangeRedis帮助类
/// </summary>
public sealed class RedisHelper
{
/// <summary>
/// Redis服务器地址
/// </summary>
private static readonly string ConnectionString = System.Configuration.ConfigurationManager.AppSettings["RedisServers"];
/// <summary>
/// 静态变量锁
/// </summary>
private static object _locker = new Object();
/// <summary>
/// 静态实例
/// </summary>
private static ConnectionMultiplexer _instance = null;
/// <summary>
/// 使用一个静态属性来返回已连接的实例，如下列中所示。这样，一旦 ConnectionMultiplexer 断开连接，便可以初始化新的连接实例。
/// </summary>
private static ConnectionMultiplexer Instance
{
get
{
try
{
if (_instance == null)
{
lock (_locker)
{
if (_instance == null || !_instance.IsConnected)
{
_instance = ConnectionMultiplexer.Connect(ConnectionString);
//注册如下事件
_instance.ConnectionFailed += MuxerConnectionFailed;
_instance.ConnectionRestored += MuxerConnectionRestored;
_instance.ErrorMessage += MuxerErrorMessage;
_instance.ConfigurationChanged += MuxerConfigurationChanged;
_instance.HashSlotMoved += MuxerHashSlotMoved;
_instance.InternalError += MuxerInternalError;
}
}
}
}
catch (Exception ex)
{
LogHelper.Error(typeof(RedisHelper), string.Format("redis初始化异常,连接字符串={0}", ConnectionString), ex);
}
return _instance;
}
}
/// <summary>
/// 获取redis数据库对象
/// </summary>
/// <returns></returns>
private static IDatabase GetDatabase()
{
return Instance.GetDatabase();
}
/// <summary>
/// 检查Key是否存在
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public static bool Exists(string key)
{
if (string.IsNullOrWhiteSpace(key))
{
return false;
}
try
{
return GetDatabase().KeyExists(key);
}
catch (Exception ex)
{
LogHelper.Error(typeof(RedisHelper), string.Format("检查Key是否存在异常,缓存key={0}", key), ex);
}
return false;
}
/// <summary>
/// 设置String类型的缓存对象(如果value是null或者空字符串则设置失败)
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
/// <param name="ts">过期时间</param>
public static bool SetString(string key, string value, TimeSpan? ts = null)
{
if (string.IsNullOrWhiteSpace(value))
{
return false;
}
try
{
return GetDatabase().StringSet(key, value, ts);
}
catch (Exception ex)
{
LogHelper.Error(typeof(RedisHelper), string.Format("设置string类型缓存异常,缓存key={0},缓存值={1}", key, value), ex);
}
return false;
}
/// <summary>
/// 根据key获取String类型的缓存对象
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public static string GetString(string key)
{
try
{
return GetDatabase().StringGet(key);
}
catch (Exception ex)
{
LogHelper.Error(typeof(RedisHelper), string.Format("获取string类型缓存异常,缓存key={0}", key), ex);
}
return null;
}
/// <summary>
/// 删除缓存
/// </summary>
/// <param name="key">key</param>
/// <returns></returns>
public static bool KeyDelete(string key)
{
try
{
return GetDatabase().KeyDelete(key);
}
catch (Exception ex)
{
LogHelper.Error(typeof(RedisHelper), "删除缓存异常,缓存key={0}" + key, ex);
return false;
}
}
/// <summary>
/// 设置Hash类型缓存对象(如果value没有公共属性则不设置缓存)
/// 会使用反射将object对象所有公共属性作为Hash列存储
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
public static void SetHash(string key, object value)
{
if (null == value)
{
return;
}
try
{
List<HashEntry> list = new List<HashEntry>();
Type type = value.GetType();
var propertyArray = type.GetProperties();
foreach (var property in propertyArray)
{
string propertyName = property.Name;
string propertyValue = property.GetValue(value).ToString();
list.Add(new HashEntry(propertyName, propertyValue));
}
if (list.Count < 1)
{
return;
}
IDatabase db = GetDatabase();
db.HashSet(key, list.ToArray());
}
catch (Exception ex)
{
LogHelper.Error(typeof(RedisHelper), string.Format("设置Hash类型缓存异常,缓存key={0},缓存值={1}", key, Utils.SerializeObject(value)), ex);
}
}
/// <summary>
/// 设置Hash类型缓存对象(用于存储对象)
/// </summary>
/// <param name="key">Key</param>
/// <param name="value">字典,key是列名 value是列的值</param>
public static void SetHash(string key, Dictionary<string, string> value)
{
if (null == value || value.Count < 1)
{
return;
}
try
{
HashEntry[] array = (from item in value select new HashEntry(item.Key, item.Value)).ToArray();
IDatabase db = GetDatabase();
db.HashSet(key, array);
}
catch (Exception ex)
{
LogHelper.Error(typeof(RedisHelper), string.Format("设置Hash类型缓存异常,缓存key={0},缓存对象值={1}", key, string.Join(",", value)), ex);
}
}
/// <summary>
/// 根据key和列数组从缓存中拿取数据(如果fieldList为空或者个数小于0返回null)
/// </summary>
/// <param name="key">缓存Key</param>
/// <param name="fieldList">列数组</param>
/// <returns>根据列数组构造一个字典,字典中的列与入参列数组相同,字典中的值是每一列的值</returns>
public static Dictionary<string, string> GetHash(string key, List<string> fieldList)
{
if (null == fieldList || fieldList.Count < 1)
{
return null;
}
try
{
Dictionary<string, string> dic = new Dictionary<string, string>();
RedisValue[] array = (from item in fieldList select (RedisValue)item).ToArray();
IDatabase db = GetDatabase();
RedisValue[] redisValueArray = db.HashGet(key, array);
for (int i = 0; i < redisValueArray.Length; i++)
{
string field = fieldList[i];
string value = redisValueArray[i];
dic.Add(field, value);
}
return dic;
}
catch (Exception ex)
{
LogHelper.Error(typeof(RedisHelper), string.Format("获取Hash类型缓存异常,缓存key={0},列数组={1}", key, string.Join(",", fieldList)), ex);
}
return null;
}
/// <summary>
/// 使用Redis incr 记录某个Key的调用次数
/// </summary>
/// <param name="key"></param>
public static long SaveInvokeCount(string key)
{
try
{
return GetDatabase().StringIncrement(key);
}
catch { return -1; }
}
/// <summary>
/// 配置更改时
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private static void MuxerConfigurationChanged(object sender, EndPointEventArgs e)
{
LogHelper.Warn(typeof(RedisHelper), "MuxerConfigurationChanged=>e.EndPoint=" + e.EndPoint, null);
}
/// <summary>
/// 发生错误时
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private static void MuxerErrorMessage(object sender, RedisErrorEventArgs e)
{
LogHelper.Error(typeof(RedisHelper), "MuxerErrorMessage=>e.EndPoint=" + e.EndPoint + ",e.Message=" + e.Message, null);
}
/// <summary>
/// 重新建立连接
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private static void MuxerConnectionRestored(object sender, ConnectionFailedEventArgs e)
{
LogHelper.Warn(typeof(RedisHelper), "MuxerConnectionRestored=>e.ConnectionType=" + e.ConnectionType + ",e.EndPoint=" + e.EndPoint + ",e.FailureType=" + e.FailureType, e.Exception);
}
/// <summary>
/// 连接失败
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private static void MuxerConnectionFailed(object sender, ConnectionFailedEventArgs e)
{
LogHelper.Error(typeof(RedisHelper), "MuxerConnectionFailed=>e.ConnectionType=" + e.ConnectionType + ",e.EndPoint=" + e.EndPoint + ",e.FailureType=" + e.FailureType, e.Exception);
}
/// <summary>
/// 更改集群
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private static void MuxerHashSlotMoved(object sender, HashSlotMovedEventArgs e)
{
LogHelper.Warn(typeof(RedisHelper), "MuxerHashSlotMoved=>" + e.NewEndPoint + ", OldEndPoint" + e.OldEndPoint, null);
}
/// <summary>
/// redis类库错误
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private static void MuxerInternalError(object sender, InternalErrorEventArgs e)
{
LogHelper.Error(typeof(RedisHelper), "MuxerInternalError", e.Exception);
}
}
}
//写String 缓存1小时
RedisHelper.SetString(subID, "AXB", new TimeSpan(1, 0, 0, 0));
//写String 缓存5分钟
RedisHelper.SetString(mobile + "_car", equipmentType, TimeSpan.FromMinutes(5));
//写String
RedisHelper.SetString(strNum, strCity);
//读String
string strTime = RedisHelper.GetString(mobile);
标签：缓存,return,string,C#,static,key,RedisHelper 来源： https://www.cnblogs.com/woadmin/p/10399624.html