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RedisCacheManager.cs
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124 lines (113 loc) · 3.89 KB
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using StackExchange.Redis;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Blog.Core.Common
{
public class RedisCacheManager : IRedisCacheManager
{
private readonly string redisConnenctionString;
public volatile ConnectionMultiplexer redisConnection;
private readonly object redisConnectionLock = new object();
public RedisCacheManager()
{
string redisConfiguration = Appsettings.app(new string[] { "AppSettings", "RedisCaching", "ConnectionString" });//获取连接字符串
if (string.IsNullOrWhiteSpace(redisConfiguration))
{
throw new ArgumentException("redis config is empty", nameof(redisConfiguration));
}
this.redisConnenctionString = redisConfiguration;
this.redisConnection = GetRedisConnection();
}
/// <summary>
/// 核心代码，获取连接实例
/// 通过双if 夹lock的方式，实现单例模式
/// </summary>
/// <returns></returns>
private ConnectionMultiplexer GetRedisConnection()
{
//如果已经连接实例，直接返回
if (this.redisConnection != null && this.redisConnection.IsConnected)
{
return this.redisConnection;
}
//加锁，防止异步编程中，出现单例无效的问题
lock (redisConnectionLock)
{
if (this.redisConnection != null)
{
//释放redis连接
this.redisConnection.Dispose();
}
this.redisConnection = ConnectionMultiplexer.Connect(redisConnenctionString);
}
return this.redisConnection;
}
/// <summary>
/// 清除
/// </summary>
public void Clear()
{
foreach (var endPoint in this.GetRedisConnection().GetEndPoints())
{
var server = this.GetRedisConnection().GetServer(endPoint);
foreach (var key in server.Keys())
{
redisConnection.GetDatabase().KeyDelete(key);
}
}
}
/// <summary>
/// 判断是否存在
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public bool Get(string key)
{
return redisConnection.GetDatabase().KeyExists(key);
}
/// <summary>
/// 获取
/// </summary>
/// <typeparam name="TEntity"></typeparam>
/// <param name="key"></param>
/// <returns></returns>
public TEntity Get<TEntity>(string key)
{
var value = redisConnection.GetDatabase().StringGet(key);
if (value.HasValue)
{
//需要用的反序列化，将Redis存储的Byte[]，进行反序列化
return SerializeHelper.Deserialize<TEntity>(value);
} else
{
return default(TEntity);
}
}
/// <summary>
/// 移除
/// </summary>
/// <param name="key"></param>
public void Remove(string key)
{
redisConnection.GetDatabase().KeyDelete(key);
}
/// <summary>
/// 设置
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
/// <param name="cacheTime"></param>
public void Set(string key, object value, TimeSpan cacheTime)
{
if (value != null)
{
//序列化，将object值生成RedisValue
redisConnection.GetDatabase().StringSet(key, SerializeHelper.Serialize(value), cacheTime);
}
}
}
}