Restricting Execution
You can restrict the execution of an interception point by using the eventpattern annotation. This annotation will be placed in the function and the value is a regular expression that the interceptor service uses to match against the incoming event. If the regex matches, the interception function executes, else it skips it. This is a great way for you to create interceptors that only fire not only for the specific interception point you want, but also on the specific incoming event.
// only execute for the admin packagevoid function preProcess(event,struct interceptData) eventPattern="^admin\."{}​// only execute for the blog modulevoid function preProcess(event,struct interceptData) eventPattern="^blog:"{}​// only execute for the blog module and the home handlervoid function preProcess(event,struct interceptData) eventPattern="^blog:home\."{}​// only execute for the blog, forums, and shop modulesvoid function preProcess(event,struct interceptData) eventPattern="^(blog|forum|shop):"{}