1   public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
 2 
 3         HttpServletRequest request = (HttpServletRequest) req;
 4         HttpServletResponse response = (HttpServletResponse) res;
 5 
 6         try {
 7             prepare.setEncodingAndLocale(request, response);
 8             prepare.createActionContext(request, response);
 9             prepare.assignDispatcherToThread();
10             if (excludedPatterns != null && prepare.isUrlExcluded(request, excludedPatterns)) {
11                 chain.doFilter(request, response);
12             } else {
13                 request = prepare.wrapRequest(request);
14                 ActionMapping mapping = prepare.findActionMapping(request, response, true);
15                 if (mapping == null) {
16                     boolean handled = execute.executeStaticResourceRequest(request, response);
17                     if (!handled) {
18                         chain.doFilter(request, response);
19                     }
20                 } else {
21                     execute.executeAction(request, response, mapping);
22                 }
23             }
24         } finally {
25             prepare.cleanupRequest(request);
26         }
27     }

 1 public class ActionContext implements Serializable {
 2 
 3     static ThreadLocal<ActionContext> actionContext = new ThreadLocal<ActionContext>();
 4 
 5     /**
 6      * Constant for the name of the action being executed.
 7      */
 8     public static final String ACTION_NAME = "com.opensymphony.xwork2.ActionContext.name";
 9 
10     /**
11      * Constant for the {@link com.opensymphony.xwork2.util.ValueStack OGNL value stack}.
12      */
13     public static final String VALUE_STACK = ValueStack.VALUE_STACK;
14 
15     /**
16      * Constant for the action‘s session.
17      */
18     public static final String SESSION = "com.opensymphony.xwork2.ActionContext.session";