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1
22 package org.jboss.aop.deployment;
23
24 import java.net.URL  ;
25
26 import javax.management.InstanceNotFoundException ;
27 import javax.management.MBeanServer ;
28 import javax.management.Notification ;
29 import javax.management.NotificationListener ;
30 import javax.management.ObjectName ;
31
32 import org.jboss.mx.loading.HeirarchicalLoaderRepository3;
33 import org.jboss.mx.loading.LoaderRepository;
34 import org.jboss.mx.util.MBeanServerLocator;
35
36
41 public class LoaderRepositoryUrlUtil implements NotificationListener
42 {
43 final static MBeanServer SERVER;
44 final static ObjectName MAIN_LOADER_REPOSITORY_OBJECT_NAME;
45 final static LoaderRepository MAIN_LOADER_REPOSITORY;
46 static
47 {
48 SERVER = MBeanServerLocator.locateJBoss();
49 try
50 {
51 MAIN_LOADER_REPOSITORY_OBJECT_NAME = new ObjectName ("JMImplementation:name=Default,service=LoaderRepository");
52 MAIN_LOADER_REPOSITORY = (LoaderRepository)SERVER.invoke(MAIN_LOADER_REPOSITORY_OBJECT_NAME, "getInstance", new Object [0], new String [0]);
53 }
54 catch (Exception e)
55 {
56 throw new RuntimeException (e);
57 }
58 }
59
60 long currentSequenceNumber;
61 long lastSequenceNumber = -1;
62 URL [] urls;
63
64 public LoaderRepositoryUrlUtil()
65 {
66 try
67 {
68 SERVER.addNotificationListener(MAIN_LOADER_REPOSITORY_OBJECT_NAME, this, null, null);
69 }
70 catch (InstanceNotFoundException e)
71 {
72 throw new RuntimeException (e);
73 }
74 }
75
76 public synchronized void handleNotification(Notification notification, Object handback)
77 {
78 if (notification.getType().equals(LoaderRepository.CLASSLOADER_ADDED))
79 {
80 currentSequenceNumber = notification.getSequenceNumber();
81 }
82 else if (notification.getType().equals(LoaderRepository.CLASSLOADER_REMOVED))
83 {
84 currentSequenceNumber = notification.getSequenceNumber();
85 }
86 }
87
88 public synchronized UrlInfo getURLInfo(HeirarchicalLoaderRepository3 scopedLoader, UrlInfo urlInfo)
89 {
90 boolean changed = false;
91 if (lastSequenceNumber != currentSequenceNumber)
92 {
93 urls = MAIN_LOADER_REPOSITORY.getURLs();
94 lastSequenceNumber = currentSequenceNumber;
95 changed = true;
96 }
97 if (!changed)
98 {
99 changed = urlInfo != null && (urlInfo.getSequenceNumber() != lastSequenceNumber);
100 }
101 if (urlInfo == null || changed)
102 {
103 URL [] localUrls = getLocalUrls(scopedLoader, urls);
104 urlInfo = new UrlInfo(urls, localUrls, lastSequenceNumber);
105 }
106 return urlInfo;
107 }
108
109 public long getCurrentSequenceNumber()
110 {
111 return currentSequenceNumber;
112 }
113
114 private URL [] getLocalUrls(HeirarchicalLoaderRepository3 scopedRepository, URL [] globalUrls)
115 {
116 URL [] scopedRepositoryUrls = scopedRepository.getURLs();
117
118 int scopedLength = 0;
121 for (int i = 0 ; i < scopedRepositoryUrls.length ; i++)
122 {
123 URL scopedUrl = scopedRepositoryUrls[i];
124 for (int j = 0 ; j < globalUrls.length ; j ++)
125 {
126 URL globalUrl = globalUrls[j];
127 if (scopedRepositoryUrls[i].equals(globalUrls[j]))
128 {
129 scopedLength = i;
130 break;
131 }
132 }
133 if (scopedLength > 0)
134 {
135 break;
136 }
137 }
138
139 URL [] localUrls = new URL [scopedLength];
140 System.arraycopy(scopedRepositoryUrls, 0, localUrls, 0, scopedLength);
141 return localUrls;
142 }
143
144 public class UrlInfo
145 {
146
147 URL [] globalUrls;
148 URL [] localUrls;
149 long sequenceNumber;
150
151 public UrlInfo(URL [] globalUrls, URL [] localUrls, long sequenceNumber)
152 {
153 super();
154 this.globalUrls = globalUrls;
155 this.localUrls = localUrls;
156 this.sequenceNumber = sequenceNumber;
157 }
158
159 public URL [] getGlobalUrls()
160 {
161 return globalUrls;
162 }
163
164 public URL [] getLocalUrls()
165 {
166 return localUrls;
167 }
168
169 public long getSequenceNumber()
170 {
171 return sequenceNumber;
172 }
173 }
174
175 }
176 |
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