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13 package com.tonbeller.wcf.controller;
14 import java.util.ArrayList  ;
15 import java.util.Collections ;
16 import java.util.Iterator ;
17 import java.util.LinkedList ;
18 import java.util.List ;
19
20 import javax.servlet.http.HttpSession ;
21
22 import org.apache.log4j.Logger;
23
29 public class WcfController extends Controller {
30 private static Logger logger = Logger.getLogger(WcfController.class);
31 private List requestListeners = new LinkedList ();
32
33 WcfController() {
34 }
35
36 private static final String WEBKEY = WcfController.class.getName() + ".dispatcher";
37
38 public static Controller instance(HttpSession session) {
39 WcfController ctrl = (WcfController) session.getAttribute(WEBKEY);
40 if (ctrl == null) {
41 ctrl = new WcfController();
42 session.setAttribute(WEBKEY, ctrl);
43 }
44 return ctrl;
45 }
46
47 public void addRequestListener(RequestListener l) {
48 requestListeners.add(l);
49 }
50
51 public void removeRequestListener(RequestListener l) {
52 requestListeners.remove(l);
53 }
54
55 public void setNextView(String uri) {
56 RequestContext context = RequestContext.instance();
57 context.getRequest().setAttribute(RequestFilter.NEXTVIEW, uri);
58 }
59
60 public String getNextView() {
61 RequestContext context = RequestContext.instance();
62 return (String )context.getRequest().getAttribute(RequestFilter.NEXTVIEW);
63 }
64
65 public void request(RequestContext context) throws Exception {
66 ArrayList list = new ArrayList (requestListeners);
69 for (Iterator it = list.iterator(); it.hasNext();) {
70 RequestListener l = (RequestListener) it.next();
71 l.request(context);
72 }
73 }
74
75 public List getRootListeners() {
76 return Collections.unmodifiableList(requestListeners);
77 }
78 }
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