1 package org.eclipse.jetty.annotations;
2
3 import java.util.HashSet;
4 import java.util.List;
5 import java.util.Set;
6
7 import javax.servlet.ServletContextEvent;
8 import javax.servlet.ServletContextListener;
9
10 import org.eclipse.jetty.annotations.AnnotationConfiguration;
11 import org.eclipse.jetty.plus.annotation.ContainerInitializer;
12 import org.eclipse.jetty.util.MultiMap;
13 import org.eclipse.jetty.webapp.WebAppContext;
14
15 // ========================================================================
16 // Copyright (c) 2006-2009 Mort Bay Consulting Pty. Ltd.
17 // ------------------------------------------------------------------------
18 // All rights reserved. This program and the accompanying materials
19 // are made available under the terms of the Eclipse Public License v1.0
20 // and Apache License v2.0 which accompanies this distribution.
21 // The Eclipse Public License is available at
22 // http://www.eclipse.org/legal/epl-v10.html
23 // The Apache License v2.0 is available at
24 // http://www.opensource.org/licenses/apache2.0.php
25 // You may elect to redistribute this code under either of these licenses.
26 // ========================================================================
27
28 /**
29 * ServletContainerInitializerListener
30 *
31 *
32 */
33 public class ServletContainerInitializerListener implements ServletContextListener
34 {
35 WebAppContext _context = null;
36
37
38 public void setWebAppContext (WebAppContext context)
39 {
40 _context = context;
41 }
42
43 /**
44 * @see javax.servlet.ServletContextListener#contextInitialized(javax.servlet.ServletContextEvent)
45 */
46 public void contextInitialized(ServletContextEvent sce)
47 {
48 List<ContainerInitializer> initializers = (List<ContainerInitializer>)_context.getAttribute(AnnotationConfiguration.CONTAINER_INITIALIZERS);
49 MultiMap classMap = (MultiMap)_context.getAttribute(AnnotationConfiguration.CLASS_INHERITANCE_MAP);
50
51 if (initializers != null)
52 {
53 for (ContainerInitializer i : initializers)
54 {
55 //We have already found the classes that directly have an annotation that was in the HandlesTypes
56 //annotation of the ServletContainerInitializer. For each of those classes, walk the inheritance
57 //hierarchy to find classes that extend or implement them.
58 if (i.getAnnotatedTypeNames() != null)
59 {
60 Set<String> annotatedClassNames = new HashSet<String>(i.getAnnotatedTypeNames());
61 for (String name : annotatedClassNames)
62 {
63 //add the class with the annotation
64 i.addApplicableTypeName(name);
65 //add the classes that inherit the annotation
66 if (classMap != null)
67 {
68 List<String> implementsOrExtends = (List<String>)classMap.getValues(name);
69 if (implementsOrExtends != null && !implementsOrExtends.isEmpty())
70 addInheritedTypes(classMap, i, implementsOrExtends);
71 }
72 }
73 }
74
75
76 //Now we need to look at the HandlesTypes classes that were not annotations. We need to
77 //find all classes that extend or implement them.
78 if (i.getInterestedTypes() != null)
79 {
80 for (Class c : i.getInterestedTypes())
81 {
82 if (!c.isAnnotation())
83 {
84 //add the classes that implement or extend the class.
85 //TODO but not including the class itself?
86 if (classMap != null)
87 {
88 List<String> implementsOrExtends = (List<String>)classMap.getValues(c.getName());
89 if (implementsOrExtends != null && !implementsOrExtends.isEmpty())
90 addInheritedTypes(classMap, i, implementsOrExtends);
91 }
92 }
93 }
94 }
95
96 //instantiate ServletContainerInitializers, call doStart
97 try
98 {
99 i.callStartup(_context);
100 }
101 catch (Exception e)
102 {
103 //OK, how do I throw an exception such that it really stops the startup sequence?
104 e.printStackTrace();
105 }
106 }
107
108 //TODO Email from Jan Luehe 18 August: after all ServletContainerInitializers have been
109 //called, need to check to see if there are any ServletRegistrations remaining
110 //that are "preliminary" and fail the deployment if so.
111 }
112
113 }
114
115
116 void addInheritedTypes (MultiMap classMap, ContainerInitializer initializer, List<String> applicableTypes)
117 {
118 for (String s : applicableTypes)
119 {
120 //add the name of the class that extends or implements
121 initializer.addApplicableTypeName(s);
122
123 //walk the hierarchy and find all types that extend or implement it
124 List<String> implementsOrExtends = (List<String>)classMap.getValues(s);
125 if (implementsOrExtends != null && !implementsOrExtends.isEmpty())
126 addInheritedTypes (classMap, initializer, implementsOrExtends);
127 }
128 }
129
130
131 /**
132 * @see javax.servlet.ServletContextListener#contextDestroyed(javax.servlet.ServletContextEvent)
133 */
134 public void contextDestroyed(ServletContextEvent sce)
135 {
136 // TODO Auto-generated method stub
137
138 }
139
140 }