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1
28
29 package com.caucho.ejb.burlap;
30
31 import com.caucho.naming.AbstractModel;
32 import com.caucho.naming.NamingExceptionWrapper;
33 import com.caucho.services.name.NameServerRemote;
34 import com.caucho.util.L10N;
35
36 import javax.ejb.EJBHome  ;
37 import javax.naming.NamingException ;
38 import java.util.ArrayList ;
39 import java.util.Hashtable ;
40 import java.util.List ;
41 import java.util.logging.Level ;
42 import java.util.logging.Logger ;
43
44
49 public class BurlapModel extends AbstractModel {
50 private static final L10N L = new L10N(BurlapModel.class);
51 private static final Logger log
52 = Logger.getLogger(BurlapModel.class.getName());
53
54 private String _urlPrefix;
55 private String _namePrefix;
56 private BurlapModel _root;
57 private Hashtable _cache;
58 private BurlapClientContainer _client;
59 private NameServerRemote _remoteRoot;
60 private NameServerRemote _remote;
61
62
65 public BurlapModel(String prefix)
66 {
67 if (! prefix.endsWith("/"))
68 prefix = prefix + '/';
69
70 _urlPrefix = prefix;
71 _namePrefix = "/";
72 _root = this;
73 _cache = new Hashtable ();
74 }
75
76
79 public BurlapModel(String namePrefix, BurlapModel root)
80 {
81 if (! namePrefix.endsWith("/"))
82 namePrefix = namePrefix + '/';
83
84 _namePrefix = namePrefix;
85 _root = root;
86 }
87
88 void setRemote(NameServerRemote remote)
89 {
90 _remote = remote;
91 }
92
93 void setClientContainer(BurlapClientContainer client)
94 {
95 _root._client = client;
96 }
97
98
101 public AbstractModel copy()
102 {
103 return this;
104 }
105
106
109 String getURLPrefix()
110 {
111 return _root._urlPrefix;
112 }
113
114
117 String getURL()
118 {
119 return getURLPrefix() + _namePrefix;
120 }
121
122
132 public Object lookup(String name)
133 throws NamingException
134 {
135 try {
136 Object obj = _root._cache.get(getURLPrefix() + _namePrefix + name);
137 if (obj != null)
138 return obj;
139
140 if (_root._remoteRoot == null) {
141 if (_root._client == null)
142 _root._client = BurlapClientContainer.find(getURLPrefix());
143
144 _root._remoteRoot =
145 (NameServerRemote) _client.createObjectStub(getURLPrefix());
146 }
147
148 obj = _root._remoteRoot.lookup(_namePrefix + name);
149
150 if (obj instanceof EJBHome )
151 _root._cache.put(name, obj);
152 else if (obj instanceof NameServerRemote) {
153 BurlapModel model = new BurlapModel(_namePrefix + name, _root);
154 _remote = (NameServerRemote) obj;
155 model.setRemote(_remote);
156 obj = model;
157 _root._cache.put(name, obj);
158 }
159
160 if (log.isLoggable(Level.FINE))
161 log.fine(this + " lookup(" + name + ")->" + obj);
162
163 return obj;
164 } catch (Exception e) {
165 throw new NamingExceptionWrapper(e);
166 }
167 }
168
169
174 public List list()
175 throws NamingException
176 {
177 try {
178 if (_remote == null) {
179 if (_root._remoteRoot == null) {
180 if (_root._client == null)
181 _root._client = BurlapClientContainer.find(getURLPrefix());
182
183 _root._remoteRoot =
184 (NameServerRemote) _client.createObjectStub(getURLPrefix());
185 }
186
187 Object obj = _root._remoteRoot.lookup(_namePrefix);
188 if (obj instanceof NameServerRemote)
189 _remote = (NameServerRemote) obj;
190 }
191
192 if (_remote == null)
193 throw new NamingException (L.l("Burlap object `{0}' is not a context.",
194 getURLPrefix() + _namePrefix));
195
196 String []list = _remote.list();
197
198 ArrayList value = new ArrayList ();
199 for (int i = 0; list != null && i < list.length; i++)
200 value.add(list[i]);
201
202 return value;
203 } catch (NamingException e) {
204 throw e;
205 } catch (Exception e) {
206 throw new NamingExceptionWrapper(e);
207 }
208 }
209
210 public String toString()
211 {
212 return "BurlapModel[url=" + " " + getURLPrefix() + ",name=" + _namePrefix + "]";
213 }
214 }
215 |
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