1. Reusable Specification of Non-functional Properties in DSLs Francisco Durán, Steffen Zschaler, and Javier Troya 28 September, 2012

2. Context Model-driven Engineering (MDE) –Domain-Specific Languages defined through Metamodels (abstract syntax) Graphics (concrete syntax) Language Semantics –Models are token models –Semantics is given through rewriting Specified using in-place model transformations 28/09/2012(c) Durán, Zschaler, Troya2

3. Example: A Production Line 28/09/2012(c) Durán, Zschaler, Troya3

4. Non-functional Properties 28/09/2012(c) Durán, Zschaler, Troya4

5. Analysis Opportunities DSL models Defined by the user + Behavioral Model Behavioral Model Structural Model Structural Model Ecore (MOF) José E. Rivera, Francisco Durán and Antonio Vallecillo: On the Behavioral Semantics of Real-Time Domain Specific Visual Languages. In Rewriting Logic and Its Applications, LNCS 6381, pp. 174–190 28/09/2012 Observer values after simulation give predictions, (Probabilistic) Model checking can be used to verify satisfaction of NFPs Observer values after simulation give predictions, (Probabilistic) Model checking can be used to verify satisfaction of NFPs

6. 28/09/2012(c) Durán, Zschaler, Troya6 A Different Example Problem: Complete redefinition of response time. Better: Extract definition of response time into a separate DSL and weave it in. Problem: Complete redefinition of response time. Better: Extract definition of response time into a separate DSL and weave it in.

7. Modularised Response Time Observer 28/09/2012(c) Durán, Zschaler, Troya7 MM ResponseTime Server, Queue, Request

8. Weaving Languages 28/09/2012(c) Durán, Zschaler, Troya8

9. Weaving Languages 28/09/2012(c) Durán, Zschaler, Troya9

10. Weaving Languages (2) 28/09/2012(c) Durán, Zschaler, Troya10

11. Weaving Languages (2) 28/09/2012(c) Durán, Zschaler, Troya11

12. Sanity Conditions Need to ensure that adding observers does not change behaviours Transformation step possible for model expressed in DSL  Step still possible in the same model expressed in DSL + Observers (possibly including appropriate observer objects) For any legal model and transformation sequence 28/09/2012(c) Durán, Zschaler, Troya12 This condition can only be checked once the merge has been performed. We provide conditions to be checked of the observer model and the binding that imply the condition below. This condition can only be checked once the merge has been performed. We provide conditions to be checked of the observer model and the binding that imply the condition below.

13. Conclusions We show composition of language semantics –For DSLs based on in-place transformation –For conservative extensions Two checkable conditions to verify consistency of such extensions –One can be checked of observer language independent of composition Currently working to weaken some of the assumptions made on base language and binding, etc. 28/09/2012(c) Durán, Zschaler, Troya13

14. QUESTIONS? 28/09/2012(c) Durán, Zschaler, Troya14