Hello,
I have al large Struts 1 application with a modified DispatchAction class. Most
action classes are derivatives from this class.
In the webapp I have several projects defined. The project can be determined by
analysing the URL.
This is done in the central DispatchAction-class by using class fields declared
as volatile. The execute-Method is declared as synchronized.
After reading a lot about thread safety now I´m not sure if this approach is
thread safe on a request level.
Abbreviated example:
public abstract class DispatchAction extends Action {
....
protected volatile long projectId = -1;
....
@Override
synchronized public ActionForward execute(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
...
long projectId = Project.getIdFromRequest(request);
...
return forward;
}
When I access projectId from a derived class is this thread safe or have I to
implement in the doExecute-Method of each derived action class ? This would be
thread safe but comes with a lot of redundant code.
Any help would be helpful.
Best regards,
Norbert
Norbert Hirneisen
science4you Online-Monitoring
http://www.science4you.org
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Norbert Hirneisen
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