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Profiling software looks for bottlenecks in program execution. In addition to the profiling services provided by IDEs and standalone profilers, the framework provides its own internal support for profiling.
Struts2 profiling aspects involves the following :-
To enable profiling, first make sure that the
profiling interceptor is applied to your action, like:
Then enable profiling using one of the following methods:
This could be done in the container startup script eg. CATALINA_OPTS in catalina.sh (tomcat) or using "java -Dxwork.profile.activate=true -jar start.jar" (jetty)
This could be done in a static block, in a Spring bean with lazy-init="false", in a Servlet with init-on-startup as some numeric value, in a Filter or Listener's init method etc.
profilingKey attribute of the
profiling interceptor to the desired name:
One could filter out the profile logging by having a System property as follows:
xwork.profile.mintime property, one could only log profile information when its execution time exceed those specified in
xwork.profile.mintime system property. If no such property is specified, it will be assumed to be 0, hence all profile information will be logged.
One could extend the profiling feature provided by Struts2 in their web application as well.
Profiled result is logged using commons-logging under the logger named
com.opensymphony.xwork2.util.profiling.UtilTimerStack. Depending on the underlying logging implementation, say if it is Log4j, one could direct the log to appear in a different file, being emailed to someone or have it stored in the db.