/// <summary>
/// edit data cache must update
/// </summary>
private static void CacheChanges <T>()
{
if (QX_Frame_Helper_DG_Config.Cache_IsCache)
{
HttpRuntimeCache_Helper_DG.Cache_Delete($"{typeof(Db).Name}_{typeof(T).Name}");
}
}
/// <summary>
/// Get Json JObject From Json File
/// </summary>
/// <param name="filePath"></param>
/// <returns></returns>
public static JObject Json_GetJObjectFromJsonFile(string filePath)
{
JObject jObject = new JObject();
if (!File.Exists(filePath))
{
throw new FileNotFoundException("the file not found in the filePath");
}
string key = filePath;
if (key.Contains("/") || key.Contains("\\"))
{
key.Replace("\\", "/");
string[] array = key.Split('/');
key = array[array.Length - 1];
}
object jobjectInCache = HttpRuntimeCache_Helper_DG.Cache_Get(key);
if (jobjectInCache != null)
{
jObject = (JObject)jobjectInCache;
}
else
{
jObject = (JObject)Newtonsoft.Json.JsonConvert.DeserializeObject(ReadFileStringContent(filePath));
HttpRuntimeCache_Helper_DG.Cache_Add(key, jObject);
}
return(jObject);
}
public static T CacheChannel <T>(string cacheHashKey, int keepMinutes, Func <T> func) where T : class
{
string hashKey = cacheHashKey.GetHashCode().ToString();
object cacheValue = HttpRuntimeCache_Helper_DG.Cache_Get(hashKey);
if (cacheValue != null)
{
return(cacheValue as T);
}
cacheValue = func();
HttpRuntimeCache_Helper_DG.Cache_Add(hashKey, cacheValue, keepMinutes);
return(cacheValue as T);
}
/// <summary>
/// query cache
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
private static IQueryable <T> GetIQuerybleByCache <T>() where T : class
{
if (QX_Frame_Helper_DG_Config.Cache_IsCache)
{
IQueryable <T> iqueryable = HttpRuntimeCache_Helper_DG.Cache_Get($"{typeof(Db).Name}_{typeof(T).Name}") as IQueryable <T>;
if (iqueryable == null)
{
iqueryable = GetCurrentDbContext().Set <T>().AsExpandable();
HttpRuntimeCache_Helper_DG.Cache_Add($"{typeof(Db).Name}_{typeof(T).Name}", iqueryable, QX_Frame_Helper_DG_Config.Cache_CacheExpirationTimeSpan_Minutes);
}
return(iqueryable);
}
else
{
return(GetCurrentDbContext().Set <T>().AsExpandable());
}
}
/*the singleton Db */
//private volatile static Db db = null; //volatile find Db in memory not in cache
#region The Singleton to new DBEntity_DG
//private static readonly object lockHelper = new object();
//static EF_Helper_DG()
//{
// if (db == null)
// {
// lock (lockHelper)
// {
// if (db == null)
// db = System.Activator.CreateInstance<Db>();
// }
// }
// //close the Validate of EF OnSaveEnabled
// db.Configuration.ValidateOnSaveEnabled = false;
//}
#endregion
#region get current dbContext
private static DbContext GetCurrentDbContext()
{
//method 1 : CallContext 该方法有有时候第一次访问不到的bug
//CallContext：是线程内部唯一的独用的数据槽（一块内存空间）
//Db dbContext = CallContext.GetData("DbContext") as Db;
//if (dbContext == null) //线程在内存中没有此上下文
//{
// //create a dbContext to memory if dbContext has not exist
// dbContext = System.Activator.CreateInstance<Db>();
// CallContext.SetData("DbContext", dbContext);
//}
//method 2 :
Db dbContext = HttpRuntimeCache_Helper_DG.Cache_Get("dbContext") as Db;
if (dbContext == null)
{
//create a dbContext to memory if dbContext has not exist
dbContext = System.Activator.CreateInstance <Db>();
HttpRuntimeCache_Helper_DG.Cache_Add("dbContext", dbContext);
}
return(dbContext);
}