public override TResult Execute <TResult>(Expression query)
{
Check.NotNull(query, nameof(query));
var queryContext = _queryContextFactory.Create();
// search for cacheable operator and extract parameter
var cachableExpressionVisitor = new CachableExpressionVisitor();
query = cachableExpressionVisitor.GetExtractCachableParameter(query, out bool isCacheable, out CacheableOptions options);
query = _queryModelGenerator.ExtractParameters(_logger, query, queryContext);
// if cacheable operator is part of the query use cache logic
if (isCacheable)
{
// generate key to identify query
var queryKey = _cacheProvider.CreateQueryKey(query, queryContext.ParameterValues);
if (_cacheProvider.TryGetCachedResult <TResult>(queryKey, out TResult cacheResult))
{
_logger.Logger.Log <object>(LogLevel.Debug, CacheableEventId.CacheHit, queryKey, null, _logFormatter);
//cache was hit, so return cached query result
return(cacheResult);
}
else // cache was not hit
{
var cacheKey = _compiledQueryCacheKeyGenerator.GenerateCacheKey(query, false);
var compiledQuery = _compiledQueryCache.GetOrAddQuery(cacheKey, () => CompileQueryCore <TResult>(query, _queryModelGenerator, _database, _logger, _contextType));
// excecute query
var queryResult = compiledQuery(queryContext);
// add query result to cache
if (ShouldResultBeCached(queryResult, options))
{
_cacheProvider.SetCachedResult <TResult>(queryKey, queryResult, options.TimeToLive);
}
_logger.Logger.Log <object>(LogLevel.Debug, CacheableEventId.QueryResultCached, queryKey, null, _logFormatter);
return(queryResult);
}
}
else
{
// return default query result
var cacheKey = _compiledQueryCacheKeyGenerator.GenerateCacheKey(query, false);
var compiledQuery = _compiledQueryCache.GetOrAddQuery(cacheKey, () => CompileQueryCore <TResult>(query, _queryModelGenerator, _database, _logger, _contextType));
return(compiledQuery(queryContext));
}
}
