public void BeforeInvoke(InvocationContext invocationContext)
{
_memoryCacheAttribute = invocationContext.GetAttributeFromMethod<MemoryCacheAttribute>();
var cacheKey = _memoryCacheAttribute.CacheKey;
var cacheConfig = _cacheConfigFactory.Config[cacheKey];
if (cacheConfig.Enabled)
{
if (!string.IsNullOrWhiteSpace(_memoryCacheAttribute.CacheKeyParameterSubstitutions))
{
List<object> paramValues = new List<object>();
string[] paramNames = _memoryCacheAttribute.CacheKeyParameterSubstitutions.Split(",", StringSplitOptions.RemoveEmptyEntries);
foreach (string paramName in paramNames)
{
paramValues.Add(invocationContext.GetParameterValue(paramName.Trim()));
}
cacheKey = string.Format(cacheConfig.CacheKey.ToString(), paramValues.ToArray());
}
CacheKey = cacheKey;
if (_memoryCacheAttribute.RefreshCache)
{
_memoryCacheService.Remove(CacheKey);
}
var cacheReturnObj = RetrieveCacheEntry(invocationContext, CacheKey);
if (cacheReturnObj != null && cacheReturnObj.CacheEntry != null)
{
var returnType = invocationContext.GetMethodReturnType();
var isAsyncMethod = returnType != null && returnType.IsGenericType &&
returnType.GetGenericTypeDefinition() == typeof(Task<>);
if (isAsyncMethod)
{
invocationContext.OverrideAsyncMethodReturnValue(cacheReturnObj.CacheEntry);
}
else
{
invocationContext.OverrideMethodReturnValue(cacheReturnObj.CacheEntry);
}
invocationContext.TempData[CacheConstants.LOGGING_CACHE_INVOCATIONCONETXT] = string.Format(
"{0}{1}{2}", CacheConstants.LOGGING_CACHE_HIT, CacheConstants.LOGGING_CACHE_DELIMITER, cacheKey);
invocationContext.BypassInvocation();
}
else
{
invocationContext.TempData[CacheConstants.LOGGING_CACHE_INVOCATIONCONETXT] = string.Format(
"{0}{1}{2}", CacheConstants.LOGGING_CACHE_MISS, CacheConstants.LOGGING_CACHE_DELIMITER, cacheKey);
}
}
}
private CacheReturnModel RetrieveCacheEntry(InvocationContext invocationContext, string key)
{
var cacheReturnObj = new CacheReturnModel();
try
{
var returnType = invocationContext.GetMethodReturnType();
cacheReturnObj.CacheEntry = IsReturnTypeGenericCollection(returnType) ?
RetrieveCollectionFromCache(key, returnType) :
_memoryCacheService.Get(key);
}
catch (Exception ex)
{
cacheReturnObj.CacheContext = CreateCacheExceptionInfoMessage(key, ex);
}
return cacheReturnObj;
}
