/// <summary>
/// 缓存方法
/// </summary>
/// <typeparam name="TData">数据类型</typeparam>
/// <param name="cacheGetter">取缓存</param>
/// <param name="sourceGetter">取源数据</param>
/// <param name="cacheSetter">写缓存</param>
/// <returns></returns>
public static TData Get <TData>(CacheGetter <TData> cacheGetter, Func <TData> sourceGetter, Action <TData> cacheSetter)
{
TData data;
//取缓存
if (cacheGetter(out data))
{
return(data);
}
//取源数据
data = sourceGetter();
//写缓存
cacheSetter(data);
return(data);
}
public static TData Get <TData>(
CacheGetter <TData> cacheGetter,
Func <TData> sourceGetter,
Action <TData> cacheSetter)
{
TData data;
if (cacheGetter(out data))
{
return(data);
}
data = sourceGetter();
cacheSetter(data);
return(data);
}
public static TData Get <TData>(
CacheGetter <TData> cacheGetter, /* get data from cache */
Func <TData> sourceGetter, /* get data from source (fairly expensive) */
Action <TData> cacheSetter /* set the data to cache */)
{
TData data;
if (cacheGetter(out data))
{
return(data);
}
data = sourceGetter();
cacheSetter(data);
return(data);
}
public static IList <T> BulkGetWithCache <T, K>(IEnumerable <K> idList, Func <IEnumerable <K>, IList <T> > realGetter, Func <T, K> keyPropertyGetter,
CacheGetter <T> cacheGeter, CacheSetter cacheSetter, Func <K, string> keyGenerator)
{
if (idList == null || idList.Count() <= 0)
{
return(new List <T>(0));
}
idList = idList.Distinct();
List <T> list = new List <T>(idList.Count());
List <K> noCacheIdList = new List <K>(idList.Count());
foreach (var id in idList)
{
string key = keyGenerator(id);
bool find;
var t = cacheGeter(key, out find);
if (find)
{
list.Add(t);
}
else
{
noCacheIdList.Add(id);
}
}
if (noCacheIdList.Count > 0)
{
var rst = realGetter(noCacheIdList);
if (rst != null && rst.Count > 0)
{
list.AddRange(rst);
foreach (T obj in rst)
{
K id = keyPropertyGetter(obj);
string key = keyGenerator(id);
cacheSetter(key, obj);
}
}
}
return(list);
}
/// <summary>
/// 获取缓存操作队列
/// </summary>
/// <param name="getter">获取缓存操作队列</param>
internal CacheGetterGetQueue(CacheGetter getter)
{
this.getter = getter;
}
