/// <summary>
/// 分布式缓存
/// </summary>
public static class RedisCache
{
/// <summary>
/// 单例工厂,每次初始化redis客户端从工厂中获取
/// </summary>
private static IRedisClientFactory _factory = RedisCacheClientFactory.Instance;
/// <summary>
/// 设置redis缓存
/// </summary>
/// <typeparam name="T">泛型类</typeparam>
/// <param name="key">缓存键</param>
/// <param name="value">泛型实体</param>
/// <param name="expire">过期时间</param>
/// <returns></returns>
public static bool Set<T>(string key, T value, DateTime expire)
{
try
{
using (var client = GetClient())
{
return client.Set<T>(key, value, expire);
}
}
catch
{
return false;
}
}
/// <summary>
/// 获取缓存
/// </summary>
/// <typeparam name="T">实体</typeparam>
/// <param name="key">键值</param>
/// <returns></returns>
public static T Get<T>(string key)
{
try
{
using (var client = GetClient())
{
return client.Get<T>(key);
}
}
catch
{
//如果redis出现异常,则直接返回默认值
return default(T);
}
}
/// <summary>
/// 移除缓存
/// </summary>
/// <param name="key"></param>
public static void Remove(string key)
{
try
{
using (var client = GetClient())
{
client.Remove(key);
}
}
catch
{ }
}
public static void RemoveAll()
{
try
{
using (var client = GetClient())
{
var keys = client.GetAllKeys();
client.RemoveAll(keys);
}
}
catch
{ }
}
/// <summary>
/// 获取客户端
/// </summary>
/// <returns></returns>
private static IRedisClient GetClient()
{
RedisClient client = null;
if (string.IsNullOrEmpty(ConfigManager.RedisServer))
{
throw new ArgumentNullException("redis server ip is empty.");
}
if (string.IsNullOrEmpty(ConfigManager.RedisPwd))
{
throw new ArgumentNullException("redis server pwd is empty.");
}
client = _factory.CreateRedisClient(ConfigManager.RedisServer, ConfigManager.RedisPort);
client.Password = ConfigManager.RedisPwd;
client.Db = ConfigManager.RedisServerDb;
return client;
}
}
用到的程序集
功能描述
可以直接缓存实体类,设置过期时间,移除缓存,获取缓存功能。
使用RedisClientFactory工厂获取redis客户端实例。如果Redis设置了密码,在配置文件中添加修改
client = factory.CreateRedisClient(ConfigManager.RedisServer, ConfigManager.RedisPort);
client.Password = ConfigManager.RedisPwd;
修改redis的ip和端口号,密码即可。
使用场景
具体的使用过程中,使用redis的超时可以对数据进行一些持久化管理,对于一些数据一致性不高的数据进行缓存,使得读取速度提高,使用redis集群时可以是用主从复制功能,Redis集群没有中心节点,并且带有复制和故障转移特性,这可以避免单个节点成为性能瓶颈,或者因为某个节点下线而导致整个集群下线。