public CacheProxy(ICacheAPI cacheApi, CacheMode cacheMode, CacheStatistics cacheStatistics)
{
this.cacheApi = cacheApi;
this.cacheMode = cacheMode;
this.cacheStatistics = cacheStatistics;
}
public IMethodReturn Invoke(IMethodInvocation input, GetNextHandlerDelegate getNext)
{
CacheMode cacheMode = GetCacheMode(input.MethodBase);
ICacheAPI cacheAPI = ChooseCacheAPI(cacheMode);
if (cacheAPI == null)
{
logger.Error("No cache used");
return(getNext()(input, getNext));
}
string cacheImplName = cacheAPI.GetType().Name;
cacheAPI = new CacheProxy(cacheAPI, cacheMode, cacheStatistics);
CacheType cacheType = GetCacheType(input.MethodBase);
string cacheGroup = GetCacheGroup(input.MethodBase);
string cacheKey = CreateCacheKey(input.MethodBase, input.Arguments);
logger.Info(string.Format("Choose cache api as {0}, cacheGroup={1}, cacheKey={2}", cacheImplName, cacheGroup, cacheKey));
if (cacheMode.Equals(CacheMode.REMOTE) && cacheStatistics.IsError(cacheMode, cacheGroup))
{
logger.Error("Remote cache error occured too many, skip cache, get data from DB.");
return(getNext()(input, getNext));
}
if (CacheType.FETCH.Equals(cacheType))
{
object obj = null;
try
{
obj = cacheAPI.Get(cacheGroup, cacheKey);
}
catch (Exception ex)
{
logger.Error("get cache failed, cachetype=" + cacheType, ex);
return(getNext()(input, getNext));
}
if (obj != null)
{
logger.Info("Hitting cache, cacheGroup=" + cacheGroup + ", cacheKey=" + cacheKey);
cacheStatistics.AddHitCount(cacheMode, cacheGroup);
return(input.CreateMethodReturn(obj, null));
}
else
{
cacheStatistics.AddUnhitCount(cacheMode, cacheGroup);
IMethodReturn methodReturn = getNext()(input, getNext);
if (methodReturn.Exception == null && methodReturn.ReturnValue != null)
{
cacheAPI.Add(cacheGroup, cacheKey, methodReturn.ReturnValue);
logger.Info("Adding into cache, cacheGroup=" + cacheGroup + ", cacheKey=" + cacheKey);
}
return(methodReturn);
}
}
else if (CacheType.CLEAR.Equals(cacheType))
{
IMethodReturn methodReturn = getNext()(input, getNext);
cacheAPI.Remove(cacheGroup, cacheKey);
return(methodReturn);
}
else if (CacheType.UPDATE.Equals(cacheType))
{
object cacheValue = GetCacheValue(input.Arguments);
if (cacheValue != null)
{
cacheAPI.Update(cacheGroup, cacheKey, cacheValue);
logger.Info("Update cache, cacheGroup=" + cacheGroup + ", cacheKey=" + cacheKey);
}
return(getNext()(input, getNext));
}
else
{
logger.Error("Invalid cache type, cachetype=" + cacheType);
return(getNext()(input, getNext));
}
}
