This repository contains the implementation and evaluation setup of the performance problem 
injector presented in the following publication: 

Philipp Keck, André van Hoorn, Dušan Okanović, Teerat Pitakrat, and Thomas F. Düllmann: 
Antipattern-Based Problem Injection for Assessing Performance and Reliability Evaluation Techniques.
In Proceedings of the 8th International Workshop on Software Aging and Rejuvenation (WoSAR 2016), 
co-located with 27th International Symposium on Software Reliability Engineering (ISSRE 2016). 
IEEE, October, 2016, Ottawa, Canada. 
The publication is available via http://diagnoseit.github.io/publications.html

The directory contents are based on the files corresponding to the example
presented in Appendix B (Java EE Servlet Container Example) of 
the Kieker user guide (http://kieker-monitoring.net/documentation/).
See the user guide (kieker-<version>_userguide.pdf) for details.

The following changes have been made to the Kieker example:
- The namespace de.uni_stuttgart.iste.ppi has been added and contains the code for
  the Performance Problem Injection. Note that this code would typically reside in a
  separate library and is only included in the same project to simplify the build process.
- The src/main/resources/META-INF/aop.xml instantiates TheRampAspect as an example.

The code is in the "jpetstore-6-mybatis-jpetstore-6.0.1" folder.
The folder "jetty" contains the server.
Build and deploy the example with "ant build-all" on the command line.
Start the server with " java -jar start.jar" in the "jetty" folder.

A "TestPlan.jmx" is provided to be used with JMeter. A JMeter version is included in 
"apache-jmeter-2.9/"- When run against the server, it will store its results in the 
working directory in a file called "results-default.jtl". 
The graphs shown in the paper have been created by filtering for rows with 
"label" == "View Product" and visualizing the "elapsed" values (duration of the 
respective request) over the "allThreads" value (number of concurrently active threads).