in debugging-struts/src/main/java/org/apache/struts/helloworld/action/HelloWorldAction.java [52:64]
public String execute() throws Exception {
messageStore = new MessageStore() ;
//Action included a query string parameter of userName
//or a form field with name of userName
if (userName != null) {
messageStore.setMessage( messageStore.getMessage() + " " + userName);
}
helloCount++;
return SUCCESS;
}