5ef69e95c0
Prevent savemessage(), and savemessageflags() to occur in dryrun mode in all backends. Still need to protect against deletemessage(). Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>
153 lines
5.0 KiB
Python
153 lines
5.0 KiB
Python
# Local status cache virtual folder
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# Copyright (C) 2002 - 2011 John Goerzen & contributors
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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from .Base import BaseFolder
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import os
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import threading
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magicline = "OFFLINEIMAP LocalStatus CACHE DATA - DO NOT MODIFY - FORMAT 1"
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class LocalStatusFolder(BaseFolder):
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def __init__(self, name, repository):
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self.sep = '.' #needs to be set before super.__init__()
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super(LocalStatusFolder, self).__init__(name, repository)
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self.filename = os.path.join(self.getroot(), self.getfolderbasename())
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self.messagelist = {}
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self.savelock = threading.Lock()
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self.doautosave = self.config.getdefaultboolean("general", "fsync",
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False)
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"""Should we perform fsyncs as often as possible?"""
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def storesmessages(self):
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return 0
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def isnewfolder(self):
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return not os.path.exists(self.filename)
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def getname(self):
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return self.name
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def getroot(self):
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return self.repository.root
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def getsep(self):
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return self.sep
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def getfullname(self):
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return self.filename
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def deletemessagelist(self):
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if not self.isnewfolder():
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os.unlink(self.filename)
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def cachemessagelist(self):
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if self.isnewfolder():
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self.messagelist = {}
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return
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file = open(self.filename, "rt")
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self.messagelist = {}
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line = file.readline().strip()
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if not line:
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# The status file is empty - should not have happened,
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# but somehow did.
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errstr = "Cache file '%s' is empty. Closing..." % self.filename
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self.ui.warn(errstr)
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file.close()
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return
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assert(line == magicline)
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for line in file.xreadlines():
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line = line.strip()
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try:
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uid, flags = line.split(':')
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uid = long(uid)
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flags = set(flags)
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except ValueError as e:
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errstr = "Corrupt line '%s' in cache file '%s'" % \
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(line, self.filename)
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self.ui.warn(errstr)
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raise ValueError(errstr)
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self.messagelist[uid] = {'uid': uid, 'flags': flags}
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file.close()
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def save(self):
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self.savelock.acquire()
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try:
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file = open(self.filename + ".tmp", "wt")
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file.write(magicline + "\n")
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for msg in self.messagelist.values():
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flags = msg['flags']
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flags = ''.join(sorted(flags))
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file.write("%s:%s\n" % (msg['uid'], flags))
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file.flush()
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if self.doautosave:
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os.fsync(file.fileno())
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file.close()
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os.rename(self.filename + ".tmp", self.filename)
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if self.doautosave:
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fd = os.open(os.path.dirname(self.filename), os.O_RDONLY)
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os.fsync(fd)
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os.close(fd)
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finally:
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self.savelock.release()
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def getmessagelist(self):
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return self.messagelist
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def savemessage(self, uid, content, flags, rtime):
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"""Writes a new message, with the specified uid.
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See folder/Base for detail. Note that savemessage() does not
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check against dryrun settings, so you need to ensure that
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savemessage is never called in a dryrun mode."""
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if uid < 0:
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# We cannot assign a uid.
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return uid
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if uid in self.messagelist: # already have it
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self.savemessageflags(uid, flags)
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return uid
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self.messagelist[uid] = {'uid': uid, 'flags': flags, 'time': rtime}
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self.save()
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return uid
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def getmessageflags(self, uid):
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return self.messagelist[uid]['flags']
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def getmessagetime(self, uid):
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return self.messagelist[uid]['time']
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def savemessageflags(self, uid, flags):
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self.messagelist[uid]['flags'] = flags
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self.save()
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def deletemessage(self, uid):
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self.deletemessages([uid])
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def deletemessages(self, uidlist):
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# Weed out ones not in self.messagelist
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uidlist = [uid for uid in uidlist if uid in self.messagelist]
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if not len(uidlist):
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return
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for uid in uidlist:
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del(self.messagelist[uid])
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self.save()
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