Diagnostic Instrumentation system can use diagnostic monitors. The diagnostic monitors can be indicated using instrumentation at class loading time. The diagnostic monitors can have associated diagnostic functions which can be enabled or disenabled while the server software is running.
CLAIMS OF PRIORTY
This application claims priority to U.S. Provisional Application No. 60/573,280 entitled "Diagnostics" filed May 21, 2004 by Shrivastava et al.
A method, computer program product, and data processing system for detecting and identifying data crossover errors in servlet code are disclosed. According to a preferred embodiment, techniques of aspect-oriented programming (AOP) are used to instrument JAVA Servlet code to detect potential data crossover errors. Specifically, pointcuts are defined to intercept both the association follow an object with a particular session and the "getting" and "setting" of such objects. Advice code associated with these pointcuts is used to update and/or consult a "collator" data structure, which is used to determine if an object or variable associated with one session is being accessed by a different session. In a preferred embodiment, the AspectJ aspect-oriented programming language/system is used to define the pointcuts and advice code.
