public void SetSlice(DatastoreEntities context, SummarySlice slice, int repositoryId, SummarySliceValue results)
{
if (!ConfigHelper.AllowCaching)
{
return;
}
int changeStamp = 0;
int queryHash = 0;
CacheResultsSlice item;
using (var q = new AcquireReaderLock(QueryCacheID, "QueryCache"))
{
//Do not cache big items
if (results.RecordList.Count > 500)
{
return;
}
if (slice.Query != null && !string.IsNullOrEmpty(slice.Query.Keyword) && !ConfigHelper.AllowCacheWithKeyword)
{
return;
}
queryHash = slice.GetHashCode();
changeStamp = RepositoryManager.GetRepositoryChangeStamp(context, repositoryId);
item = _cacheSlice.FirstOrDefault(x => x.QueryHash == queryHash &&
x.RepositoryId == repositoryId &&
x.ChangeStamp == changeStamp);
//If data has not changed and results are in cache then do nothing except mark as accessed
if (item != null)
{
item.Results = results;
item.Timestamp = DateTime.Now;
return;
}
}
using (var q = new AcquireWriterLock(QueryCacheID, "QueryCache"))
{
//Remove previous cache
_cacheSlice.RemoveAll(x => x.QueryHash == queryHash && x.RepositoryId == repositoryId);
//Create a new cache item
item = new CacheResultsSlice()
{
QueryHash = queryHash,
RepositoryId = repositoryId,
ChangeStamp = changeStamp,
Results = results,
QueryString = slice.ToString(),
ParentId = RepositoryManager.GetSchemaParentId(repositoryId),
};
_cacheSlice.Add(item);
}
}
public SummarySliceValue GetSlice(DatastoreEntities context, SummarySlice slice, int repositoryId)
{
if (!ConfigHelper.AllowCaching)
{
return(null);
}
using (var q = new AcquireReaderLock(QueryCacheID, "QueryCache"))
{
var queryHash = slice.GetHashCode();
var changeStamp = RepositoryManager.GetRepositoryChangeStamp(context, repositoryId);
var item = _cacheSlice.FirstOrDefault(x => x.QueryHash == queryHash && x.RepositoryId == repositoryId && x.ChangeStamp == changeStamp);
if (item == null)
{
return(null);
}
item.Timestamp = DateTime.Now;
item.HitCount++;
return(item.Results);
}
}