Abstract: Runtime monitoring is an important part of the study on self-adaptive software systems,and it is also an important design principle in building dependable software systems．However,most of the existing research works on runtime monitoring often mix the monitoring logic and the business logic．Different from these existing works,this paper proposed a requirement-model driven approach for self-adaptive software systems．Based on the goal model and the constraints specification,we illustrated how to define the monitoring model,how to deduce the specification of monitor from the goal model,how to generate and weave the monitoring codes automatically,how to diagnose and reconfigure the target system at runtime．This approach implements these tasks by separating the application code and the monitoring code,which is essential for facilitating software maintenance and promoting software reuse.

Key words: Goal model,Runtime monitoring,Self-adaptation,Reconfiguration