internal void RegisterQueryResult(int transaction_id, FanoutQueryMessageReader request, AggregationObject aggregation_obj)
{
if (aggregation_obj.results.Count == 0)
{
Log.WriteLine(LogLevel.Debug, "QueryResultCache: ignoring empty query result, transaction id = {0}.", transaction_id);
return;
}
QueryResultCacheEntry entry = new QueryResultCacheEntry(transaction_id, aggregation_obj);
string key_query = GetQueryResultCacheRequestKey(request);
string key_trans = GetQueryResultCacheTransactionKey(entry.transaction_id);
m_memory_cache.Set(key_query, entry, m_cache_policy);
m_memory_cache.Set(key_trans, entry, m_cache_policy);
}
/// <returns>null if no cached query result is found.</returns>
internal AggregationObject GetCachedQueryResult(FanoutQueryMessageReader query)
{
string key = GetQueryResultCacheRequestKey(query);
QueryResultCacheEntry entry = (QueryResultCacheEntry)m_memory_cache.Get(key);
if (entry == null)
{
return(null);
}
int result_cnt = entry.aggregation_obj.results.Count;
if (result_cnt < FanoutSearchModule.MinimalRequiredResultCount(query))
{
return(null);
}
Log.WriteLine(LogLevel.Debug, "QueryResultCache: Cache hit.");
return(entry.aggregation_obj);
}