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comparison upmana/mercurial/transaction.py @ 121:496dbf12a6cb alpha

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Traipse Alpha 'OpenRPG' {091030-00} Traipse is a distribution of OpenRPG that is designed to be easy to setup and go. Traipse also makes it easy for developers to work on code without fear of sacrifice. 'Ornery-Orc' continues the trend of 'Grumpy' and adds fixes to the code. 'Ornery-Orc's main goal is to offer more advanced features and enhance the productivity of the user. Update Summary (Cleaning up for Beta): Adds Bookmarks (Alpha) with cool Smiley Star and Plus Symbol images! Changes made to the map for increased portability. SnowDog has changes planned in Core, though. Added an initial push to the BCG. Not much to see, just shows off how it is re-writing Main code. Fix to remote admin commands Minor fix to texted based server, works in /System/ folder Some Core changes to gametree to correctly disply Pretty Print, thanks David! Fix to Splitter Nodes not being created. Added images to Plugin Control panel for Autostart feature Fix to massive amounts of images loading; from Core fix to gsclient so with_statement imports Added 'boot' command to remote admin Prep work in Pass tool for remote admin rankings and different passwords, ei, Server, Admin, Moderator, etc. Remote Admin Commands more organized, more prep work. Added Confirmation window for sent nodes. Minor changes to allow for portability to an OpenSUSE linux OS (hopefully without breaking) {091028} Made changes to gametree to start working with Element Tree, mostly from Core Minor changes to Map to start working with Element Tree, from Core Preliminary changes to map efficiency, from FlexiRPG Miniatures Layer pop up box allows users to turn off Mini labels, from FlexiRPG Changes to main.py to start working with Element Tree {091029} Changes made to server to start working with Element Tree. Changes made to Meta Server Lib. Prepping test work for a multi meta network page. Minor bug fixed with mini to gametree Zoom Mouse plugin added. {091030} Getting ready for Beta. Server needs debugging so Alpha remains bugged. Plugin UI code cleaned. Auto start works with a graphic, pop-up asks to enable or disable plugin. Update Manager now has a partially working Status Bar. Status Bar captures terminal text, so Merc out put is visible. Manifest.xml file, will be renamed, is now much cleaner. Debug Console has a clear button and a Report Bug button. Prep work for a Term2Win class in Debug Console. Known: Current Alpha fails in Windows.
author sirebral
date Fri, 30 Oct 2009 22:21:40 -0500
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120:d86e762a994f 121:496dbf12a6cb
1 # transaction.py - simple journalling scheme for mercurial
2 #
3 # This transaction scheme is intended to gracefully handle program
4 # errors and interruptions. More serious failures like system crashes
5 # can be recovered with an fsck-like tool. As the whole repository is
6 # effectively log-structured, this should amount to simply truncating
7 # anything that isn't referenced in the changelog.
8 #
9 # Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
10 #
11 # This software may be used and distributed according to the terms of the
12 # GNU General Public License version 2, incorporated herein by reference.
13
14 from i18n import _
15 import os, errno
16 import error
17
18 def active(func):
19 def _active(self, *args, **kwds):
20 if self.count == 0:
21 raise error.Abort(_(
22 'cannot use transaction when it is already committed/aborted'))
23 return func(self, *args, **kwds)
24 return _active
25
26 def _playback(journal, report, opener, entries, unlink=True):
27 for f, o, ignore in entries:
28 if o or not unlink:
29 try:
30 opener(f, 'a').truncate(o)
31 except:
32 report(_("failed to truncate %s\n") % f)
33 raise
34 else:
35 try:
36 fn = opener(f).name
37 os.unlink(fn)
38 except IOError, inst:
39 if inst.errno != errno.ENOENT:
40 raise
41 os.unlink(journal)
42
43 class transaction(object):
44 def __init__(self, report, opener, journal, after=None, createmode=None):
45 self.journal = None
46
47 self.count = 1
48 self.report = report
49 self.opener = opener
50 self.after = after
51 self.entries = []
52 self.map = {}
53 self.journal = journal
54 self._queue = []
55
56 self.file = open(self.journal, "w")
57 if createmode is not None:
58 os.chmod(self.journal, createmode & 0666)
59
60 def __del__(self):
61 if self.journal:
62 if self.entries: self._abort()
63 self.file.close()
64
65 @active
66 def startgroup(self):
67 self._queue.append([])
68
69 @active
70 def endgroup(self):
71 q = self._queue.pop()
72 d = ''.join(['%s\0%d\n' % (x[0], x[1]) for x in q])
73 self.entries.extend(q)
74 self.file.write(d)
75 self.file.flush()
76
77 @active
78 def add(self, file, offset, data=None):
79 if file in self.map: return
80
81 if self._queue:
82 self._queue[-1].append((file, offset, data))
83 return
84
85 self.entries.append((file, offset, data))
86 self.map[file] = len(self.entries) - 1
87 # add enough data to the journal to do the truncate
88 self.file.write("%s\0%d\n" % (file, offset))
89 self.file.flush()
90
91 @active
92 def find(self, file):
93 if file in self.map:
94 return self.entries[self.map[file]]
95 return None
96
97 @active
98 def replace(self, file, offset, data=None):
99 '''
100 replace can only replace already committed entries
101 that are not pending in the queue
102 '''
103
104 if file not in self.map:
105 raise KeyError(file)
106 index = self.map[file]
107 self.entries[index] = (file, offset, data)
108 self.file.write("%s\0%d\n" % (file, offset))
109 self.file.flush()
110
111 @active
112 def nest(self):
113 self.count += 1
114 return self
115
116 def running(self):
117 return self.count > 0
118
119 @active
120 def close(self):
121 self.count -= 1
122 if self.count != 0:
123 return
124 self.file.close()
125 self.entries = []
126 if self.after:
127 self.after()
128 else:
129 os.unlink(self.journal)
130 self.journal = None
131
132 @active
133 def abort(self):
134 self._abort()
135
136 def _abort(self):
137 self.count = 0
138 self.file.close()
139
140 if not self.entries: return
141
142 self.report(_("transaction abort!\n"))
143
144 try:
145 try:
146 _playback(self.journal, self.report, self.opener, self.entries, False)
147 self.report(_("rollback completed\n"))
148 except:
149 self.report(_("rollback failed - please run hg recover\n"))
150 finally:
151 self.journal = None
152
153
154 def rollback(opener, file, report):
155 entries = []
156
157 for l in open(file).readlines():
158 f, o = l.split('\0')
159 entries.append((f, int(o), None))
160
161 _playback(file, report, opener, entries)