Create LocalStatus or LocalStatusSQLite folders
Depending on the configuration we use the plain text or the new experimental sqlite backend for the LocalStatus cache. Make plain text the default status backend but allow people to configure status_backend=sqlite in their [Account ...] section. Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de> Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>
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@ -17,6 +17,9 @@ New Features
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readonly = True. When e.g. using offlineimap for backup purposes you
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can thus make sure that no changes in your backup trickle back into
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the main IMAP server.
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* optional: experimental SQLite-based backend for the LocalStatus
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cache. Plain text remains the default. Enable by setting
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status_backend=sqlite in the [Account ...] section
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Changes
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-------
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@ -41,11 +44,3 @@ Pending for the next major release
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* UIs get shorter and nicer names. (API changing)
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* Implement IDLE feature. (delayed until next major release)
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Stalled
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=======
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* Learn Sqlite support.
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Stalled: it would need to learn the ability to choose between the current
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format and SQL to help testing the long term.
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@ -197,6 +197,23 @@ remoterepository = RemoteExample
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# You can also specify parameters to the commands
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# presynchook = imapfilter -c someotherconfig.lua
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# OfflineImap caches the state of the synchronisation to e.g. be able to
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# determine if a mail has been deleted on one side or added on the
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# other.
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#
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# The default and historical backend is 'plain' which writes out the
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# state in plain text files. On Repositories with large numbers of
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# mails, the performance might not be optimal, as we write out the
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# complete file for each change. Another new backend 'sqlite' is
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# available which stores the status in sqlite databases. BE AWARE THIS
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# IS EXPERIMENTAL STUFF.
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#
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# If you switch the backend, you may want to delete the old cache
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# directory in ~/.offlineimap/Account-<account>/LocalStatus manually
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# once you are sure that things work.
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#
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#status_backend = plain
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# If you have a limited amount of bandwidth available you can exclude larger
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# messages (e.g. those with large attachments etc). If you do this it
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# will appear to offlineimap that these messages do not exist at all. They
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@ -18,7 +18,8 @@
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from Base import BaseRepository
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from offlineimap import folder
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import offlineimap.folder.LocalStatus
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from offlineimap.folder.LocalStatus import LocalStatusFolder
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from offlineimap.folder.LocalStatusSQLite import LocalStatusSQLiteFolder
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import os
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import re
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@ -26,9 +27,25 @@ class LocalStatusRepository(BaseRepository):
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def __init__(self, reposname, account):
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BaseRepository.__init__(self, reposname, account)
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self.directory = os.path.join(account.getaccountmeta(), 'LocalStatus')
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#statusbackend can be 'plain' or 'sqlite'
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backend = self.account.getconf('status_backend', 'plain')
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if backend == 'sqlite':
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self._backend = 'sqlite'
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self.LocalStatusFolderClass = LocalStatusSQLiteFolder
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self.directory += '-sqlite'
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elif backend == 'plain':
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self._backend = 'plain'
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self.LocalStatusFolderClass = LocalStatusFolder
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else:
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raise SyntaxWarning("Unknown status_backend '%s' for account '%s'" \
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% (backend, account.name))
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if not os.path.exists(self.directory):
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os.mkdir(self.directory, 0700)
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self.folders = None
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# self._folders is a list of LocalStatusFolders()
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self._folders = None
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def getsep(self):
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return '.'
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@ -40,16 +57,22 @@ class LocalStatusRepository(BaseRepository):
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return os.path.join(self.directory, foldername)
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def makefolder(self, foldername):
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# "touch" the file, truncating it.
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"""Create a LocalStatus Folder
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Empty Folder for plain backend. NoOp for sqlite backend as those
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are created on demand."""
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# Invalidate the cache.
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self._folders = None
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if self._backend == 'sqlite':
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return
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filename = self.getfolderfilename(foldername)
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file = open(filename + ".tmp", "wt")
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file.write(offlineimap.folder.LocalStatus.magicline + '\n')
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file.flush()
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os.fsync(file.fileno())
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file.close()
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os.rename(filename + ".tmp", filename)
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# Invalidate the cache.
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self.folders = None
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self._folders = None
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def getfolder(self, foldername):
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"""Return the Folder() object for a foldername"""
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@ -72,4 +95,3 @@ class LocalStatusRepository(BaseRepository):
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"""Forgets the cached list of folders, if any. Useful to run
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after a sync run."""
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self._folders = None
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