/// <summary>
/// 加载缓存
/// </summary>
/// <param name="entityCfg"></param>
public void LoadCache(EntityCfg entityCfg)
{
string key = string.Empty;
try {
//从继承的CustomerLoader中获取数据
IList data;
ICacheLoader cacheLoader;
if (!string.IsNullOrEmpty(entityCfg.CustomLoaderType))
{
string[] cfgContent = entityCfg.CustomLoaderType.Split(',');
cacheLoader = MB.Util.DllFactory.Instance.LoadObject(cfgContent[0], cfgContent[1]) as ICacheLoader;
data = cacheLoader.LoadCache();
}
else
{
throw new MB.Util.APPException("Entity节点中CustomLoaderType不存在");
}
if (!data.GetType().IsGenericType)
{
throw new MB.Util.APPException("加载器返回的IList不是泛型列表");;
}
key = data.GetType().GetGenericArguments()[0].FullName;
if (data != null)
{
CacheData cacheData = fillCacheData(data, entityCfg); //将数据填入CacheData
addCacheDataToContainer(key, cacheData, entityCfg); //将CacheData存入EnterpriseLib的CacheManager
}
}
catch (Exception ex) {
MB.Util.TraceEx.Write("缓存加载器{0}出错，错误信息：{1}", key, ex.ToString());
}
}
/// <summary>
/// 加载CacheData中的项目
/// </summary>
private CacheData fillCacheData(IList data, EntityCfg entityCfg)
{
Type genericCacheDataType = typeof(CacheData <>).MakeGenericType(data.GetType().GetGenericArguments()[0]);
CacheData cacheData = DllFactory.Instance.CreateInstance(genericCacheDataType) as CacheData;
MB.Util.MyReflection.Instance.InvokeMethodByName(cacheData, "InitCacheData", data, entityCfg);
return(cacheData);
}
/// <summary>
/// 将Cache的数据加到缓存manager中
/// </summary>
/// <param name="cacheData"></param>
/// <param name="entityCfg"></param>
private void addCacheDataToContainer(string key, CacheData cacheData, EntityCfg entityCfg)
{
if (entityCfg != null)
{
List <ICacheItemExpiration> cacheItemExpiration = new List <ICacheItemExpiration>();
foreach (var cacheExpireCfg in entityCfg.Expirations)
{
if (cacheExpireCfg.ExpirationType == CacheExpirationType.AbsoluteTime)
{
TimeSpan ts = TimeSpan.FromMilliseconds(cacheExpireCfg.ExpireTime);
if (ts.TotalMilliseconds > 0)
{
AbsoluteTime absoluteTime = new AbsoluteTime(ts);
cacheItemExpiration.Add(absoluteTime);
}
}
else if (cacheExpireCfg.ExpirationType == CacheExpirationType.SlidingTime)
{
TimeSpan ts = TimeSpan.FromMilliseconds(cacheExpireCfg.ExpireTime);
if (ts.TotalMilliseconds > 0)
{
SlidingTime slidingTime = new SlidingTime(ts);
cacheItemExpiration.Add(slidingTime);
}
}
else if (cacheExpireCfg.ExpirationType == CacheExpirationType.FileDependency)
{
if (System.IO.File.Exists(cacheExpireCfg.FilePath))
{
FileDependency fileDependency = new FileDependency(cacheExpireCfg.FilePath);
cacheItemExpiration.Add(fileDependency);
}
}
}
if (entityCfg.IsCacheItemRefreshed)
{
_EntitySetCache.Add(key, cacheData, entityCfg.CacheItemPriority, new CacheItemRefreshAction(entityCfg, key), cacheItemExpiration.ToArray());
}
else
{
_EntitySetCache.Add(key, cacheData, entityCfg.CacheItemPriority, null, cacheItemExpiration.ToArray());
}
}
else
{
_EntitySetCache.Add(key, cacheData);
}
}
/// <summary>
/// 从继承的CustomerLoader中获取数据
/// </summary>
/// <param name="entityCfg"></param>
/// <returns></returns>
private IList loadCacheData(EntityCfg entityCfg)
{
IList data;
if (!string.IsNullOrEmpty(entityCfg.CustomLoaderType))
{
string[] cfgContent = entityCfg.CustomLoaderType.Split(',');
ICacheLoader cacheLoader = MB.Util.DllFactory.Instance.LoadObject(cfgContent[0].Trim(), cfgContent[1].Trim()) as ICacheLoader;
data = cacheLoader.LoadCache();
}
else
{
throw new MB.Util.APPException("Entity节点中CustomLoaderType不存在");
}
return(data);
}
/// <summary>
/// 获取缓存加载器
/// </summary>
/// <returns></returns>
public List <EntityCfg> GetEntitySetCfg()
{
string cacheConfig = CachePath + CacheFileInfoName;
if (!File.Exists(cacheConfig))
{
throw new MB.Util.APPException(string.Format("缓存需要的配置文件 {0} 不存在", cacheConfig), Util.APPMessageType.SysErrInfo);
}
//获取需要载入的文件列表
XElement root = XElement.Load(cacheConfig);
var entitySet = from c in root.Elements("EntitySet").Elements()
select c;
List <EntityCfg> cfgs = new List <EntityCfg>();
foreach (var entity in entitySet)
{
EntityCfg cfg = new EntityCfg();
string name = entity.Attribute("Name") == null ? string.Empty : entity.Attribute("Name").Value;
string ruleType = entity.Attribute("RuleType") == null ? string.Empty : entity.Attribute("RuleType").Value;
string customLoaderType = entity.Attribute("CustomLoaderType") == null ? string.Empty : entity.Attribute("CustomLoaderType").Value;
string cacheItempriority = entity.Attribute("CacheItemPriority") == null ? "NotRemovable" : entity.Attribute("CacheItemPriority").Value;
string isRefreshed = entity.Attribute("IsCacheItemRefreshed") == null ? "false" : entity.Attribute("IsCacheItemRefreshed").Value;
cfg.Name = name;
cfg.RuleType = ruleType;
cfg.CustomLoaderType = customLoaderType;
Microsoft.Practices.EnterpriseLibrary.Caching.CacheItemPriority priority;
if (Enum.TryParse <Microsoft.Practices.EnterpriseLibrary.Caching.CacheItemPriority>(cacheItempriority, out priority))
{
cfg.CacheItemPriority = priority;
}
else
{
cfg.CacheItemPriority = Microsoft.Practices.EnterpriseLibrary.Caching.CacheItemPriority.NotRemovable;
MB.Util.TraceEx.Write(string.Format("Entity中的名称为({0})的CacheItemPriority的值{1}配置的不正确", name, cacheItempriority));
}
bool tempIsRefreshed;
if (bool.TryParse(isRefreshed, out tempIsRefreshed))
{
cfg.IsCacheItemRefreshed = tempIsRefreshed;
}
else
{
cfg.IsCacheItemRefreshed = false;
}
List <CacheExpirationCfg> expireCfgs = new List <CacheExpirationCfg>();
var expirations = from e in entity.Descendants("Expiration")
select e;
foreach (var expiration in expirations)
{
CacheExpirationCfg expCfg = new CacheExpirationCfg();
string expirationType = expiration.Attribute("ExpirationType") == null ? string.Empty : expiration.Attribute("ExpirationType").Value;
string filePath = expiration.Attribute("FilePath") == null ? string.Empty : expiration.Attribute("FilePath").Value;
string expireTime = expiration.Attribute("ExpireTime") == null ? "0" : expiration.Attribute("ExpireTime").Value;
CacheExpirationType expireType;
if (Enum.TryParse <CacheExpirationType>(expirationType, out expireType))
{
expCfg.ExpirationType = expireType;
}
else
{
expCfg.ExpirationType = CacheExpirationType.Never;
MB.Util.TraceEx.Write(string.Format("Expiration中的名称为({0})的ExpirationType的值{1}配置的不正确", name, expirationType));
}
expCfg.FilePath = filePath;
int tempExpireTime;
if (int.TryParse(expireTime, out tempExpireTime))
{
expCfg.ExpireTime = tempExpireTime;
}
else
{
expCfg.ExpireTime = 0;
}
expireCfgs.Add(expCfg);
}
cfg.Expirations = expireCfgs;
cfgs.Add(cfg);
}
return(cfgs);
}
public CacheItemRefreshAction(EntityCfg entityCfg, string key)
{
_EntityCfg = entityCfg;
_Key = key;
}