1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
|
// **********************************************************************
//
// Copyright (c) 2003-2009 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
package FilesystemI;
import Ice.*;
import Filesystem.*;
public class DirectoryI extends _DirectoryDisp implements NodeI, _DirectoryOperations
{
// Slice name() operation.
public synchronized String
name(Current c)
{
if(_destroyed)
{
throw new ObjectNotExistException();
}
return _name;
}
// Return the object identity for this node.
public Identity
id()
{
return _id;
}
// Slice list() operation.
public NodeDesc[]
list(Current c)
{
synchronized(this)
{
if(_destroyed)
{
throw new ObjectNotExistException();
}
}
synchronized(_lcMutex)
{
reap();
NodeDesc[] ret = new NodeDesc[_contents.size()];
java.util.Iterator<java.util.Map.Entry<String, NodeI> > pos = _contents.entrySet().iterator();
for(int i = 0; i < _contents.size(); ++i)
{
java.util.Map.Entry<String, NodeI> e = pos.next();
NodeI p = e.getValue();
ret[i] = new NodeDesc();
ret[i].name = e.getKey();
ret[i].type = p instanceof FileI ? NodeType.FileType : NodeType.DirType;
ret[i].proxy = NodePrxHelper.uncheckedCast(c.adapter.createProxy(p.id()));
}
return ret;
}
}
// Slice find() operation.
public NodeDesc
find(String name, Current c) throws NoSuchName
{
synchronized(this)
{
if(_destroyed)
{
throw new ObjectNotExistException();
}
}
synchronized(_lcMutex)
{
reap();
NodeI p = (NodeI)_contents.get(name);
if(p == null)
{
throw new NoSuchName(name);
}
NodeDesc d = new NodeDesc();
d.name = name;
d.type = p instanceof FileI ? NodeType.FileType : NodeType.DirType;
d.proxy = NodePrxHelper.uncheckedCast(c.adapter.createProxy(p.id()));
return d;
}
}
// Slice createFile() operation.
public FilePrx
createFile(String name, Current c) throws NameInUse
{
synchronized(this)
{
if(_destroyed)
{
throw new ObjectNotExistException();
}
}
synchronized(_lcMutex)
{
reap();
if(_contents.containsKey(name))
{
throw new NameInUse(name);
}
return new FileI(name, this).activate(c.adapter);
}
}
// Slice createDirectory() operation.
public DirectoryPrx
createDirectory(String name, Current c) throws NameInUse
{
synchronized(this)
{
if(_destroyed)
{
throw new ObjectNotExistException();
}
}
synchronized(_lcMutex)
{
reap();
if(_contents.containsKey(name))
{
throw new NameInUse(name);
}
return new DirectoryI(name, this).activate(c.adapter);
}
}
// Slice destroy() operation.
public void
destroy(Current c) throws PermissionDenied
{
if(_parent == null)
{
throw new PermissionDenied("Cannot destroy root directory");
}
synchronized(this)
{
if(_destroyed)
{
throw new ObjectNotExistException();
}
synchronized(_lcMutex)
{
reap();
if(_contents.size() != 0)
{
throw new PermissionDenied("Cannot destroy non-empty directory");
}
c.adapter.remove(id());
_parent.addReapEntry(_name);
_destroyed = true;
}
}
}
// DirectoryI constructor for root directory.
public DirectoryI()
{
this("/", null);
}
// DirectoryI constructor. parent == null indicates root directory.
public DirectoryI(String name, DirectoryI parent)
{
_name = name;
_parent = parent;
_id = new Identity();
_destroyed = false;
_contents = new java.util.HashMap<String, NodeI>();
_id.name = parent == null ? "RootDir" : Util.generateUUID();
}
// Add servant to ASM and to parent's _contents map.
public DirectoryPrx
activate(Ice.ObjectAdapter a)
{
DirectoryPrx node = DirectoryPrxHelper.uncheckedCast(a.add(this, _id));
if(_parent != null)
{
_parent.addChild(_name, this);
}
return node;
}
// Add the name-node pair to the _contents map.
public void
addChild(String name, NodeI node)
{
_contents.put(name, node);
}
// Add this directory and the name of a deleted entry to the reap map.
public void
addReapEntry(String name)
{
java.util.List<String> l = _reapMap.get(this);
if(l != null)
{
l.add(name);
}
else
{
l = new java.util.ArrayList<String>();
l.add(name);
_reapMap.put(this, l);
}
}
// Remove all names in the reap map from the corresponding directory contents.
private static void
reap()
{
java.util.Iterator<java.util.Map.Entry<DirectoryI, java.util.List<String> > > i =
_reapMap.entrySet().iterator();
while(i.hasNext())
{
java.util.Map.Entry<DirectoryI, java.util.List<String> > e = i.next();
DirectoryI dir = e.getKey();
java.util.List<String> l = e.getValue();
java.util.Iterator<String> j = l.iterator();
while(j.hasNext())
{
dir._contents.remove(j.next());
}
}
_reapMap.clear();
}
public static java.lang.Object _lcMutex = new java.lang.Object();
private String _name; // Immutable
private DirectoryI _parent; // Immutable
private Identity _id; // Immutable
private boolean _destroyed;
private java.util.Map<String, NodeI> _contents;
private static java.util.Map<DirectoryI, java.util.List<String> > _reapMap =
new java.util.HashMap<DirectoryI, java.util.List<String> >();
}
|
