private static IEnumerable <TResult> GetFromCache <TResult>(OeParseUriContext parseUriContext, T dbContext, Db.OeQueryCache queryCache) { Db.QueryCacheItem queryCacheItem = queryCache.GetQuery(parseUriContext); Func <QueryContext, IEnumerable <TResult> > queryExecutor; if (queryCacheItem == null) { IQueryable query = parseUriContext.EntitySetAdapter.GetEntitySet(dbContext); var parameterVisitor = new OeConstantToParameterVisitor(); Expression expression = parseUriContext.CreateExpression(query, parameterVisitor); queryExecutor = dbContext.CreateQueryExecutor <TResult>(expression); queryCache.AddQuery(parseUriContext, queryExecutor, parameterVisitor.ConstantToParameterMapper); parseUriContext.ParameterValues = parameterVisitor.ParameterValues; } else { queryExecutor = (Func <QueryContext, IEnumerable <TResult> >)queryCacheItem.Query; parseUriContext.EntryFactory = queryCacheItem.EntryFactory; } var queryContextFactory = dbContext.GetService <IQueryContextFactory>(); var queryContext = queryContextFactory.Create(); foreach (Db.OeQueryCacheDbParameterValue parameterValue in parseUriContext.ParameterValues) { queryContext.AddParameter(parameterValue.ParameterName, parameterValue.ParameterValue); } return(queryExecutor(queryContext)); }
private static IAsyncEnumerable <TResult> GetFromCache <TResult>(OeQueryContext queryContext, T dbContext, Db.OeQueryCache queryCache) { OeCacheContext cacheContext = queryContext.CreateCacheContext(); Db.QueryCacheItem queryCacheItem = queryCache.GetQuery(cacheContext); Func <QueryContext, IAsyncEnumerable <TResult> > queryExecutor; Expression countExpression; IReadOnlyList <Db.OeQueryCacheDbParameterValue> parameterValues; if (queryCacheItem == null) { IQueryable query = queryContext.EntitySetAdapter.GetEntitySet(dbContext); var parameterVisitor = new OeConstantToParameterVisitor(false); Expression expression = queryContext.CreateExpression(query, parameterVisitor); queryExecutor = dbContext.CreateAsyncQueryExecutor <TResult>(expression); countExpression = queryContext.CreateCountExpression(query, expression); queryCache.AddQuery(queryContext.CreateCacheContext(parameterVisitor.ConstantToParameterMapper), queryExecutor, countExpression, queryContext.EntryFactory, queryContext.SkipTokenParser?.Accessors); parameterValues = parameterVisitor.ParameterValues; } else { queryExecutor = (Func <QueryContext, IAsyncEnumerable <TResult> >)queryCacheItem.Query; queryContext.EntryFactory = queryCacheItem.EntryFactory; if (queryContext.SkipTokenParser != null) { queryContext.SkipTokenParser.Accessors = queryCacheItem.SkipTokenAccessors; } countExpression = queryCacheItem.CountExpression; parameterValues = cacheContext.ParameterValues; } var queryContextFactory = dbContext.GetService <IQueryContextFactory>(); QueryContext efQueryContext = queryContextFactory.Create(); foreach (Db.OeQueryCacheDbParameterValue parameterValue in parameterValues) { efQueryContext.AddParameter(parameterValue.ParameterName, parameterValue.ParameterValue); } if (queryContext.ODataUri.QueryCount.GetValueOrDefault()) { queryContext.CountExpression = new OeParameterToVariableVisitor().Translate(countExpression, parameterValues); } return(queryExecutor(efQueryContext)); }