/// <summary>
/// 获取外部程序集的缓存
/// </summary>
/// <param name="info"></param>
/// <param name="type"></param>
/// <param name="connectionString"></param>
/// <returns></returns>
private static ICacheAdaper GetAssemblyCache(DBInfo info, string type, string connectionString)
{
Assembly _cacheAssembly = null;
try
{
_cacheAssembly = Assembly.Load("Buffalo.QueryCache");
}
catch (Exception ex)
{
throw new MissingMemberException("找不到类Buffalo.QueryCache,请保证项目已经引用了Buffalo.QueryCache.dll");
}
if (_cacheAssembly == null)
{
throw new MissingMemberException("找不到类Buffalo.QueryCache,请保证项目已经引用了Buffalo.QueryCache.dll");
}
Type loaderType = _cacheAssembly.GetType("Buffalo.QueryCache.CacheLoader", false, false);
if (loaderType == null)
{
throw new MissingMemberException("找不到类Buffalo.QueryCache.CacheLoader,请保证Buffalo.QueryCache.dll的完整性");
}
MethodInfo mInfo = loaderType.GetMethod("GetCache");
if (loaderType == null)
{
throw new MissingMethodException("找不到方法GetCache,请保证Buffalo.QueryCache.dll的完整性");
}
ICacheAdaper cache = mInfo.Invoke(null, new object[] { info, type, connectionString }) as ICacheAdaper;
return(cache);
}
/// <summary>
/// 根据类型创建缓存适配器
/// </summary>
/// <param name="type">类型</param>
/// <param name="connectionString">连接字符串</param>
/// <returns></returns>
public static ICacheAdaper GetCache(DBInfo info, string type, string connectionString)
{
if (string.IsNullOrEmpty(type))
{
return(null);
}
string dtype = type.Trim();
if (dtype.Equals("system", StringComparison.CurrentCultureIgnoreCase))//内存
{
return(new MemoryAdaper(info));
}
ICacheAdaper cache = GetAssemblyCache(info, dtype, connectionString);
if (cache != null)
{
return(cache);
}
throw new NotSupportedException("不支持:" + type + " 的缓存类型，当前只支持system、memcached、redis类型的缓存");
}
/// <summary>
/// 获取当前配置文件的数据库信息
/// </summary>
/// <param name="doc"></param>
/// <returns></returns>
public static DBInfo GetDBInfo(XmlDocument doc)
{
string dbType = null;
string connectionString = null;
string name = null;
//string output = null;
string[] attNames = null;
ICacheAdaper ica = null;
string cacheType = null;
string cacheConn = null;
//Dictionary<string, string> extendDatabaseConnection = new Dictionary<string,string>();
if (doc == null)
{
throw new Exception("找不到配置文件");
}
bool isAlltable = false;
XmlNodeList lstConfig = doc.GetElementsByTagName("config");
if (lstConfig.Count > 0)
{
XmlNode node = lstConfig[0];
foreach (XmlAttribute att in node.Attributes)
{
if (att.Name.Equals("dbType", StringComparison.CurrentCultureIgnoreCase))
{
dbType = att.InnerText;
}
//else if (att.Name.Equals("output", StringComparison.CurrentCultureIgnoreCase))
//{
// output = att.InnerText;
//}
else if (att.Name.Equals("name", StringComparison.CurrentCultureIgnoreCase))
{
name = att.InnerText;
}
else if (att.Name.Equals("connectionString", StringComparison.CurrentCultureIgnoreCase))
{
connectionString = att.InnerText;
}
else if (att.Name.Equals("appnamespace", StringComparison.CurrentCultureIgnoreCase))
{
string names = att.InnerText;
if (!string.IsNullOrEmpty(names))
{
attNames = names.Split(new char[] { '|' });
}
for (int i = 0; i < attNames.Length; i++)
{
string attName = attNames[i];
if (!attName.EndsWith("."))
{
attNames[i] = attName + ".";
}
}
}
else if (att.Name.Equals("cache", StringComparison.CurrentCultureIgnoreCase))
{
cacheType = att.InnerText;
}
else if (att.Name.Equals("cacheConnString", StringComparison.CurrentCultureIgnoreCase))
{
cacheConn = att.InnerText;
}
else if (att.Name.Equals("allCache", StringComparison.CurrentCultureIgnoreCase))
{
isAlltable = att.InnerText == "1";
}
}
}
else
{
throw new Exception("配置文件没有config节点");
}
DBInfo info = new DBInfo(name, connectionString, dbType);
ica = QueryCache.GetCache(info, cacheType, cacheConn);
info.SetQueryCache(ica, isAlltable);
info.DataaccessNamespace = attNames;
return(info);
}
/// <summary>
/// 设置查询缓存
/// </summary>
/// <param name="ica"></param>
internal void SetQueryCache(ICacheAdaper ica, bool isAlltable)
{
_cache.InitCache(ica, isAlltable);
}
/// <summary>
/// 初始化缓存
/// </summary>
/// <param name="cache">缓存类</param>
/// <param name="isAllTableCache">是否所有表都进行缓存</param>
public void InitCache(ICacheAdaper cache, bool isAllTableCache)
{
_cache = cache;
_isAllTableCache = isAllTableCache;
}
