[转载]Discuz!NT中的Redis架构设计

using (IRedisClient Redis = RedisManager.GetClient())
{
Redis.Set<byte[]>(objId, new ObjectSerializer().Serialize(o));
}
}

/// <summary>
/// 加入当前对象到缓存中
/// </summary>
/// <param name=”objId”>对象的键值</param>
/// <param name=”o”>缓存的对象</param>
/// <param name=”o”>到期时间,单位:秒</param>
public override void AddObject(string objId, object o, int expire)
{
//凡是以”/Forum/ShowTopic/”为前缀不添加到本地缓存中，现类似键值包括: “/Forum/ShowTopic/Tag/{topicid}/” , “/Forum/ShowTopic/TopList/{fid}”
if (!objId.StartsWith(“/Forum/ShowTopic/“))
base.AddObject(objId, o, expire);

using (IRedisClient Redis = RedisManager.GetClient())
{
//永不过期
if (expire == 0)
Redis.Set<byte[]>(objId, new ObjectSerializer().Serialize(o));
else
Redis.Set<byte[]>(objId, new ObjectSerializer().Serialize(o), DateTime.Now.AddSeconds(expire));
}
}

/// <summary>
/// 移除指定ID的对象
/// </summary>
/// <param name=”objId”></param>
public override void RemoveObject(string objId)
{
//先移除本地cached，然后再移除memcached中的相应数据
base.RemoveObject(objId);
using (IRedisClient Redis = RedisManager.GetClient())
{
Redis.Remove(objId);
}
Discuz.EntLib.SyncCache.SyncRemoteCache(objId);
}

public override object RetrieveObject(string objId)
{
object obj = base.RetrieveObject(objId);

if (obj == null)
{
using (IRedisClient Redis = RedisManager.GetClient())
{
obj = new ObjectSerializer().Deserialize(Redis.Get<byte[]>(objId));

if (obj != null && !objId.StartsWith(“/Forum/ShowTopic/“))//对ShowTopic页面缓存数据不放到本地缓存
{
if (objId.StartsWith(“/Forum/ShowTopicGuestCachePage/“))//对游客缓存页面ShowTopic数据缓存设置有效时间
base.TimeOut = GeneralConfigs.GetConfig().Guestcachepagetimeout * 60;
if (objId.StartsWith(“/Forum/ShowForumGuestCachePage/“))//对游客缓存页面ShowTopic数据缓存设置有效时间
base.TimeOut = RedisConfigs.GetConfig().CacheShowForumCacheTime * 60;
else
base.TimeOut = LocalCacheTime;

base.AddObject(objId, obj, TimeOut);
}
}
}
return obj;
}

/// <summary>
/// 到期时间,单位:秒
/// </summary>
public override int TimeOut
{
get
{
return 3600;
}
}

/// <summary>
/// 本地缓存到期时间,单位:秒
/// </summary>
public int LocalCacheTime
{
get
{
return RedisConfigs.GetConfig().LocalCacheTime;
}
}

/// <summary>
/// 清空的有缓存数据
/// </summary>
public override void FlushAll()
{
base.FlushAll();
using (IRedisClient Redis = RedisManager.GetClient())
{
Redis.FlushAll();
}
}
}

private string _writeServerList;
/// <summary>
/// 可写的Redis链接地址
/// </summary>
public string WriteServerList
{
get
{
return _writeServerList;
}
set
{
_writeServerList = value;
}
}

private string _readServerList;
/// <summary>
/// 可读的Redis链接地址
/// </summary>
public string ReadServerList
{
get
{
return _readServerList;
}
set
{
_readServerList = value;
}
}

private int _maxWritePoolSize;
/// <summary>
/// 最大写链接数
/// </summary>
public int MaxWritePoolSize
{
get
{
return _maxWritePoolSize > 0 ? _maxWritePoolSize : 5;
}
set
{
_maxWritePoolSize = value;
}
}

private int _maxReadPoolSize;
/// <summary>
/// 最大读链接数
/// </summary>
public int MaxReadPoolSize
{
get
{
return _maxReadPoolSize > 0 ? _maxReadPoolSize : 5;
}
set
{
_maxReadPoolSize = value;
}
}

private bool _autoStart;
/// <summary>
/// 自动重启
/// </summary>
public bool AutoStart
{
get
{
return _autoStart;
}
set
{
_autoStart = value;
}
}

private int _localCacheTime = 30000;
/// <summary>
/// 本地缓存到期时间，该设置会与memcached搭配使用，单位:秒
/// </summary>
public int LocalCacheTime
{
get
{
return _localCacheTime;
}
set
{
_localCacheTime = value;
}
}

private bool _recordeLog = false;
/// <summary>
/// 是否记录日志,该设置仅用于排查redis运行时出现的问题,如redis工作正常,请关闭该项
/// </summary>
public bool RecordeLog
{
get
{
return _recordeLog;
}
set
{
_recordeLog = value;
}
}

private int _cacheShowTopicPageNumber = 5;
/// <summary>
/// 缓存帖子列表分页数(showtopic页数使用缓存前N页的帖子列表信息)
/// </summary>
public int CacheShowTopicPageNumber
{
get
{
return _cacheShowTopicPageNumber;
}
set
{
_cacheShowTopicPageNumber = value;
}
}

/// <summary>
/// 缓存showforum页面分页数
/// </summary>
public int CacheShowForumPageNumber{set;get;}

/// <summary>
/// 缓存showforum页面时间(单位:分钟)
/// </summary>
public int CacheShowForumCacheTime{set;get;}
}

using ServiceStack.Redis;
using ServiceStack.Redis.Generic;
using ServiceStack.Redis.Support;

namespace Discuz.EntLib
{
/// <summary>
/// MemCache管理操作类
/// </summary>
public sealed class RedisManager
{
/// <summary>
/// redis配置文件信息
/// </summary>
private static RedisConfigInfo redisConfigInfo = RedisConfigs.GetConfig();

private static PooledRedisClientManager prcm;

/// <summary>
/// 静态构造方法，初始化链接池管理对象
/// </summary>
static RedisManager()
{
CreateManager();
}

/// <summary>
/// 创建链接池管理对象
/// </summary>
private static void CreateManager()
{
string[] writeServerList = Utils.SplitString(redisConfigInfo.WriteServerList, “,“);
string[] readServerList = Utils.SplitString(redisConfigInfo.ReadServerList, “,“);

prcm = new PooledRedisClientManager(readServerList, writeServerList,
new RedisClientManagerConfig
{
MaxWritePoolSize = redisConfigInfo.MaxWritePoolSize,
MaxReadPoolSize = redisConfigInfo.MaxReadPoolSize,
AutoStart = redisConfigInfo.AutoStart,
});
}

/// <summary>
/// 客户端缓存操作对象
/// </summary>
public static IRedisClient GetClient()
{
if (prcm == null)
CreateManager();

return prcm.GetClient();
}
}
}