/// <summary>
/// 根据键更新一个缓存
/// </summary>
/// <param name="key"></param>
public static bool UpdateCache(string key)
{
key = key.Trim();
if (cacheDatas.ContainsKey(key))
{
MemoryDataCacheItem cacheItem = cacheDatas[key];
DBHelper sqlHelper = cacheItem.DBHelper;
sqlHelper.Params = cacheItem.Params;
try
{
var data = QueryData(key, cacheItem.Type, cacheItem.Query, sqlHelper);
cacheItem.UpdatedData = data;
cacheItem.UpdateTime = DateTime.Now;
cacheItem.QueryCount += 1;
return(true);
}
catch { }
}
return(false);
}
/// <summary>
/// 根据键更新一个缓存
/// </summary>
/// <param name="key"></param>
public static bool UpdateCache(string key)
{
key = key.Trim();
if (cacheDatas.ContainsKey(key))
{
MemoryDataCacheItem cacheItem = cacheDatas[key];
DBHelper helper = cacheItem.DBHelper;
helper.Params = cacheItem.Params;
try
{
var data = QueryData(key, cacheItem.Type, cacheItem.Query, cacheItem.Mapping, helper);
//将新数据放放UpdateData中, 下次调用时填入Data
cacheItem.UpdatedData = data;
cacheItem.UpdateTime = DateTime.Now;
cacheItem.QueryCount += 1;
cacheItem.Data = null;
return(true);
}
catch { }
}
return(false);
}
internal static Dictionary <string, TItem> GetCacheList <TItem>(string query, IEnumerable <Attribute.FieldMapping> mapping, int timeOut, DBHelper helper, out string key) where TItem : IModel, new()
{
Type type = typeof(TItem);
var typeKey = string.Format("{0}_{1}", type.FullName, helper.DatabaseName.ToLower());
query = query.ToLower();
string Params = string.Join(":", helper.Params);
//按参数进行缓存
key = StringHelper.EncryptMD5(query + Params + "|" + helper.DatabaseName);//按库名
//初始缓存
MemoryDataCacheItem dataItem;
var a = cacheDatas.TryGetValue(key, out dataItem);
if (!a)
{
dataItem = new MemoryDataCacheItem()
{
Data = null, Mapping = mapping, TimeOut = timeOut, DBHelper = helper, Query = query, Params = new Dictionary <string, object>(helper.Params), Type = type
};
cacheDatas.TryAdd(key, dataItem);
lock (lockObj)
{
if (typeCache.ContainsKey(typeKey))
{
typeCache[typeKey].Add(key);
}
else
{
typeCache[typeKey] = new List <string>()
{
key
};
}
}
}
else
{
if (dataItem.QueryCount == 0)//缓存没有创建好时返回空
{
var ts = DateTime.Now - dataItem.UpdateTime;
if (ts.TotalMinutes < 1)
{
throw new CRLException($"缓存[{typeof(TItem)}]创建中...");
}
}
}
//首次查询
if (dataItem.QueryCount == 0)
{
try
{
var data = QueryData(key, type, query, mapping, helper);
var data2 = ObjectConvert.ConvertToDictionary <TItem>(data);
dataItem.Data = data2;
dataItem.Count = data2.Count;
dataItem.QueryCount = 1;
dataItem.UpdateTime = DateTime.Now;
}
catch (Exception ero)
{
cacheDatas.TryRemove(key, out dataItem);
typeCache[typeKey].Remove(key);
throw ero;
}
}
if (timer == null)
{
StarWatch();
}
//更新缓存数据
if (dataItem.UpdatedData != null)
{
var data2 = ObjectConvert.ConvertToDictionary <TItem>(dataItem.UpdatedData);
dataItem.Data = data2;
dataItem.Count = data2.Count;
dataItem.UpdatedData = null;
}
dataItem.UseTime = DateTime.Now;
return(dataItem.Data as Dictionary <string, TItem>);
}
