1
22
23 package com.liferay.portal.kernel.servlet;
24
25 import com.liferay.portal.kernel.util.StringPool;
26
27 import java.io.IOException;
28
29 import java.util.HashMap;
30 import java.util.Map;
31
32 import javax.servlet.ServletException;
33 import javax.servlet.http.HttpServlet;
34 import javax.servlet.http.HttpServletRequest;
35 import javax.servlet.http.HttpServletResponse;
36
37
48 public class PortalDelegatorServlet extends HttpServlet {
49
50 public static void addDelegate(String subContext, HttpServlet delegate) {
51 if (subContext == null) {
52 throw new IllegalArgumentException();
53 }
54
55 if (delegate == null) {
56 throw new IllegalArgumentException();
57 }
58
59 _delegates.put(subContext, delegate);
60 }
61
62 public static void removeDelegate(String subContext) {
63 if (subContext == null) {
64 throw new IllegalArgumentException();
65 }
66
67 _delegates.remove(subContext);
68 }
69
70 public void service(HttpServletRequest req, HttpServletResponse res)
71 throws IOException, ServletException {
72
73 String uri = req.getPathInfo();
74
75 if ((uri == null) || (uri.length() == 0)) {
76 throw new ServletException("Path information is not specified");
77 }
78
79 String[] paths = uri.split(StringPool.SLASH);
80
81 if (paths.length < 2) {
82 throw new ServletException("Path " + uri + " is invalid");
83 }
84
85 HttpServlet delegate = _delegates.get(paths[1]);
86
87 if (delegate == null) {
88 throw new ServletException(
89 "No servlet registred for context " + paths[1]);
90 }
91
92 ClassLoader contextClassLoader =
93 Thread.currentThread().getContextClassLoader();
94
95 try {
96 ClassLoader delegateClassLoader =
97 delegate.getClass().getClassLoader();
98
99 Thread.currentThread().setContextClassLoader(delegateClassLoader);
100
101 delegate.service(req, res);
102 }
103 finally {
104 Thread.currentThread().setContextClassLoader(contextClassLoader);
105 }
106 }
107
108 private static Map<String, HttpServlet> _delegates =
109 new HashMap<String, HttpServlet>();
110
111 }