/// <summary>
/// 获取value
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public override object GetValue(string key)
{
try
{
CacheKeyMapDescriptor cacheKeyMap = EnsureKeyExist(key);
OnOperating("开始获取value:starting:key:" + key + ",cacheId:" + cacheKeyMap.CacheId);
if (cacheKeyMap == null)
{
return(null);
}
MongoDBCacheEntity entity = GetMongoDBEntity(cacheKeyMap);
if (entity != null)
{
OnOperating("获取value成功:end-->:key:" + key + ",cacheId:" + cacheKeyMap.CacheId + ",value:" + entity.CacheValue);
return(entity.CacheValue);
}
OnOperating("获取value失败:未找到key:" + key + "对应的值");
return(null);
}
catch (Exception ex)
{
OnOperating("获取value异常:" + JsonConvert.SerializeObject(ex) + "");
return(null);
}
}
/// <summary>
/// 确保key值存在
/// </summary>
/// <param name="key">key</param>
/// <param name="isBackExpireData">如果当前key过期是否返回对应的对象</param>
/// <returns></returns>
private CacheKeyMapDescriptor EnsureKeyExist(string key, bool isBackExpireData = false)
{
try
{
CacheKeyMapDescriptor cacheKeyMap = CacheKeyMapManger.Instance.GetCacheKeyMap(key);
if (cacheKeyMap == null)
{
return(null);
// throw new KeyNotFoundException("Cache Key:" + key + " is not exist");
}
if (cacheKeyMap.ExpireDate <= DateTime.Now)
{
if (isBackExpireData)
{
return(cacheKeyMap);
}
else
{
return(null);
}
}
return(cacheKeyMap);
//if (!CacheKeyProvider.Instance.CacheKeyCollection.ContainsKey("_" + key))
//{
// throw new KeyNotFoundException("Cache Key:" + key + " is not exist");
//}
//return CacheKeyProvider.Instance.CacheKeyCollection["_" + key];
}
catch (Exception ex)
{
OnOperating("EnsureKeyExist异常,excption:" + JsonConvert.SerializeObject(ex));
return(null);
}
}
/// <summary>
/// 获取value
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <param name="value"></param>
/// <returns></returns>
public override bool TryGetValue <T>(string key, out T value)
{
try
{
T temp = default(T);
CacheKeyMapDescriptor cacheKeyMap = EnsureKeyExist(key);
OnOperating("开始尝试获取值:starting:key:" + key + ",cacheId:" + cacheKeyMap);
if (cacheKeyMap == null)
{
value = default(T);
return(false);
}
MongoDBCacheEntity entity = GetMongoDBEntity(cacheKeyMap);
OnOperating("尝试获取值结束：end:key:" + key + ",cacheId:" + cacheKeyMap.CacheId + ",result:" + JsonConvert.SerializeObject(entity));
value = default(T);
value = JsonConvert.DeserializeObject <T>(entity.CacheValue);
return(true);
}
catch (Exception ex)
{
OnOperating("尝试获取值异常：exception:key:" + key + ",excption:" + JsonConvert.SerializeObject(ex));
value = default(T);
return(false);
}
}
private MongoDBCacheEntity GetMongoDBEntity(CacheKeyMapDescriptor cacheKeyMap)
{
try
{
MongoCollection <MongoDBCacheEntity> collection = DistributedCacheHelper.GetMongoDBCollection(cacheKeyMap.CacheId, cacheKeyMap.Cachelimit);
var query2 = Query.And(
Query.EQ("_id", cacheKeyMap.CacheId)
//Query.GT("Expires", DateTime.Now),
// Query.EQ("CacheSta", "1")
//Query.EQ("ApplicationName", pApplicationName)
);
return(collection.FindOne(query2));
}
catch (Exception ex)
{
OnOperating("GetMongoDBEntity异常,excption:" + JsonConvert.SerializeObject(ex));
return(null);
}
}
/// <summary>
/// 删除value
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public override bool DeleteValue(string key, bool isClearOtherExpire)
{
try
{
CacheKeyMapDescriptor cacheKeyMap = EnsureKeyExist(key, true);
if (cacheKeyMap == null)
{
return(false);
}
OnOperating("开始删除值:starting:key:" + key + ",cacheId:" + cacheKeyMap.CacheId);
MongoCollection <MongoDBCacheEntity> collection = DistributedCacheHelper.GetMongoDBCollection(cacheKeyMap.CacheId, cacheKeyMap.Cachelimit);
var query2 = Query.And(
Query.EQ("_id", cacheKeyMap.CacheId)
);
WriteConcernResult res = collection.Remove(query2);//移除文档
//清空过期的集合数据
if (res.Ok)
{
bool r = CacheKeyMapManger.Instance.DeleteCacheKeyMap(key);
if (isClearOtherExpire)
{
DistributedCacheHelper.ClearExpireData(cacheKeyMap);
}
if (r)
{
OnOperating("删除值完成:end:key:" + key + ",cacheId:" + cacheKeyMap.CacheId + ",result:" + res.Ok + "," + res.ErrorMessage);
return(true);
}
OnOperating("删除值失败:end:key:" + key + ",cacheId:" + cacheKeyMap.CacheId + ",result:" + res.Ok + "," + res.ErrorMessage);
return(false);
}
OnOperating("删除值完成:end:key:" + key + ",cacheId:" + cacheKeyMap.CacheId + ",result:" + res.Ok + "," + res.ErrorMessage);
return(false);
}
catch (Exception ex)
{
OnOperating("删除值异常:key:" + key + ",exception:" + JsonConvert.SerializeObject(ex));
return(false);
}
}