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
|
#!/usr/bin/env python
# **********************************************************************
#
# Copyright (c) 2003-2014 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.
#
# **********************************************************************
import sys, threading, Ice
Ice.loadSlice('Filesystem.ice')
import Filesystem
class DirectoryI(Filesystem.Directory):
def __init__(self, communicator, name, parent):
self._name = name
self._parent = parent
self._contents = []
# Create an identity. The root directory has the fixed identity "RootDir"
#
self._id = Ice.Identity()
if self._parent:
self._id.name = Ice.generateUUID()
else:
self._id.name = "RootDir"
# Slice Node::name() operation
def name(self, current=None):
return self._name
# Slice Directory::list() operation
def list(self, current=None):
return self._contents
# addChild is called by the child in order to add
# itself to the _contents member of the parent
def addChild(self, child):
self._contents.append(child)
# Add servant to ASM and Parent's _contents map.
def activate(self, a):
thisNode = Filesystem.DirectoryPrx.uncheckedCast(a.add(self, self._id))
if self._parent:
self._parent.addChild(thisNode)
class FileI(Filesystem.File):
def __init__(self, communicator, name, parent):
self._name = name
self._parent = parent
self.lines = []
assert(self._parent != None)
# Create an identity
#
self._id = Ice.Identity()
self._id.name = Ice.generateUUID()
# Slice Node::name() operation
def name(self, current=None):
return self._name
# Slice File::read() operation
def read(self, current=None):
return self._lines
# Slice File::write() operation
def write(self, text, current=None):
self._lines = text
# Add servant to ASM and Parent's _contents map.
def activate(self, a):
thisNode = Filesystem.FilePrx.uncheckedCast(a.add(self, self._id))
self._parent.addChild(thisNode)
class Server(Ice.Application):
def run(self, args):
# Terminate cleanly on receipt of a signal
#
self.shutdownOnInterrupt()
# Create an object adapter
#
adapter = self.communicator().createObjectAdapterWithEndpoints(
"SimpleFileSystem", "default -h localhost -p 10000")
# Create the root directory (with name "/" and no parent)
#
root = DirectoryI(self.communicator(), "/", None)
root.activate(adapter)
# Create a file called "README" in the root directory
#
file = FileI(self.communicator(), "README", root)
text = [ "This file system contains a collection of poetry." ]
try:
file.write(text)
except Filesystem.GenericError as e:
print(e.reason)
file.activate(adapter)
# Create a directory called "Coleridge" in the root directory
#
coleridge = DirectoryI(self.communicator(), "Coleridge", root)
coleridge.activate(adapter)
# Create a file called "Kubla_Khan" in the Coleridge directory
#
file = FileI(self.communicator(), "Kubla_Khan", coleridge)
text = [ "In Xanadu did Kubla Khan",
"A stately pleasure-dome decree:",
"Where Alph, the sacred river, ran",
"Through caverns measureless to man",
"Down to a sunless sea." ]
try:
file.write(text)
except Filesystem.GenericError as e:
print(e.reason)
file.activate(adapter)
# All objects are created, allow client requests now
#
adapter.activate()
# Wait until we are done
#
self.communicator().waitForShutdown()
if self.interrupted():
print(self.appName() + ": terminating")
return 0
app = Server()
sys.exit(app.main(sys.argv))
|
