1 //
2 // ========================================================================
3 // Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
8 //
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
11 //
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
14 //
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
17 //
18
19 package org.eclipse.jetty.annotations;
20
21 import java.util.HashSet;
22 import java.util.List;
23 import java.util.Set;
24
25 import org.eclipse.jetty.annotations.AnnotationConfiguration;
26 import org.eclipse.jetty.plus.annotation.ContainerInitializer;
27 import org.eclipse.jetty.util.MultiMap;
28 import org.eclipse.jetty.util.component.AbstractLifeCycle;
29 import org.eclipse.jetty.util.log.Log;
30 import org.eclipse.jetty.util.log.Logger;
31 import org.eclipse.jetty.webapp.WebAppContext;
32
33 /**
34 * ServletContainerInitializerListener
35 *
36 *
37 */
38 public class ServletContainerInitializerListener extends AbstractLifeCycle
39 {
40 private static final Logger LOG = Log.getLogger(ServletContainerInitializerListener.class);
41 protected WebAppContext _context = null;
42
43
44 public void setWebAppContext (WebAppContext context)
45 {
46 _context = context;
47 }
48
49
50 /**
51 * Call the doStart method of the ServletContainerInitializers
52 * @see org.eclipse.jetty.util.component.AbstractLifeCycle#doStart()
53 */
54 public void doStart()
55 {
56 List<ContainerInitializer> initializers = (List<ContainerInitializer>)_context.getAttribute(AnnotationConfiguration.CONTAINER_INITIALIZERS);
57 MultiMap classMap = (MultiMap)_context.getAttribute(AnnotationConfiguration.CLASS_INHERITANCE_MAP);
58
59 if (initializers != null)
60 {
61 for (ContainerInitializer i : initializers)
62 {
63 //We have already found the classes that directly have an annotation that was in the HandlesTypes
64 //annotation of the ServletContainerInitializer. For each of those classes, walk the inheritance
65 //hierarchy to find classes that extend or implement them.
66 if (i.getAnnotatedTypeNames() != null)
67 {
68 Set<String> annotatedClassNames = new HashSet<String>(i.getAnnotatedTypeNames());
69 for (String name : annotatedClassNames)
70 {
71 //add the class with the annotation
72 i.addApplicableTypeName(name);
73 //add the classes that inherit the annotation
74 if (classMap != null)
75 {
76 List<String> implementsOrExtends = (List<String>)classMap.getValues(name);
77 if (implementsOrExtends != null && !implementsOrExtends.isEmpty())
78 addInheritedTypes(classMap, i, implementsOrExtends);
79 }
80 }
81 }
82
83
84 //Now we need to look at the HandlesTypes classes that were not annotations. We need to
85 //find all classes that extend or implement them.
86 if (i.getInterestedTypes() != null)
87 {
88 for (Class c : i.getInterestedTypes())
89 {
90 if (!c.isAnnotation())
91 {
92 //add the classes that implement or extend the class.
93 //TODO but not including the class itself?
94 if (classMap != null)
95 {
96 List<String> implementsOrExtends = (List<String>)classMap.getValues(c.getName());
97 if (implementsOrExtends != null && !implementsOrExtends.isEmpty())
98 addInheritedTypes(classMap, i, implementsOrExtends);
99 }
100 }
101 }
102 }
103
104 //instantiate ServletContainerInitializers, call doStart
105 try
106 {
107 i.callStartup(_context);
108 }
109 catch (Exception e)
110 {
111 LOG.warn(e);
112 throw new RuntimeException(e);
113 }
114 }
115 }
116
117 }
118
119
120 void addInheritedTypes (MultiMap classMap, ContainerInitializer initializer, List<String> applicableTypes)
121 {
122 for (String s : applicableTypes)
123 {
124 //add the name of the class that extends or implements
125 initializer.addApplicableTypeName(s);
126
127 //walk the hierarchy and find all types that extend or implement it
128 List<String> implementsOrExtends = (List<String>)classMap.getValues(s);
129 if (implementsOrExtends != null && !implementsOrExtends.isEmpty())
130 addInheritedTypes (classMap, initializer, implementsOrExtends);
131 }
132 }
133
134
135
136 /**
137 * Nothing to do for ServletContainerInitializers on stop
138 * @see org.eclipse.jetty.util.component.AbstractLifeCycle#doStop()
139 */
140 public void doStop()
141 {
142
143 }
144
145 }