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(
71 HttpServletRequest request, HttpServletResponse response)
72 throws IOException, ServletException {
73
74 String uri = request.getPathInfo();
75
76 if ((uri == null) || (uri.length() == 0)) {
77 throw new ServletException("Path information is not specified");
78 }
79
80 String[] paths = uri.split(StringPool.SLASH);
81
82 if (paths.length < 2) {
83 throw new ServletException("Path " + uri + " is invalid");
84 }
85
86 HttpServlet delegate = _delegates.get(paths[1]);
87
88 if (delegate == null) {
89 throw new ServletException(
90 "No servlet registred for context " + paths[1]);
91 }
92
93 ClassLoader contextClassLoader =
94 Thread.currentThread().getContextClassLoader();
95
96 try {
97 ClassLoader delegateClassLoader =
98 delegate.getClass().getClassLoader();
99
100 Thread.currentThread().setContextClassLoader(delegateClassLoader);
101
102 delegate.service(request, response);
103 }
104 finally {
105 Thread.currentThread().setContextClassLoader(contextClassLoader);
106 }
107 }
108
109 private static Map<String, HttpServlet> _delegates =
110 new HashMap<String, HttpServlet>();
111
112 }