Kieker4DQL: Declarative Performance Measurement

Abstract

The Descartes Query Language (DQL) enables to query the performance of a system using adapters to various solution approaches. Thereby, DQL is a realization of the vision of Declarative Performance Engineering (DPE) which decouples the description of user concerns (performance questions and goals) from the task of selecting and applying a specific solution approach. While model-based approaches are already supported by DQL, measurement based approaches are not. In this paper we present the Kieker4DQL — an adapter for DQL that performs query processing for Application Monitoring Tools, the Kieker in particular. It creates a tailored monitoring configuration to start measurements. The resulting monitoring data is filtered and interpreted according to the query.