Mercurial > p > roundup > code
comparison roundup/instance.py @ 1158:30db4a11d700
sanity check instance attributes on open
| author | Richard Jones <richard@users.sourceforge.net> |
|---|---|
| date | Tue, 17 Sep 2002 23:59:32 +0000 |
| parents | 9b910e8d987d |
| children | 86d41c31f9be |
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| 1157:26c8cb2162d7 | 1158:30db4a11d700 |
|---|---|
| 13 # BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | 13 # BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 14 # FOR A PARTICULAR PURPOSE. THE CODE PROVIDED HEREUNDER IS ON AN "AS IS" | 14 # FOR A PARTICULAR PURPOSE. THE CODE PROVIDED HEREUNDER IS ON AN "AS IS" |
| 15 # BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE, | 15 # BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE, |
| 16 # SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. | 16 # SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
| 17 # | 17 # |
| 18 # $Id: instance.py,v 1.6 2002-09-10 00:18:20 richard Exp $ | 18 # $Id: instance.py,v 1.7 2002-09-17 23:59:32 richard Exp $ |
| 19 | 19 |
| 20 __doc__ = ''' | 20 __doc__ = ''' |
| 21 Instance handling (open instance). | 21 Tracker handling (open tracker). |
| 22 | 22 |
| 23 Currently this module provides one function: open. This function opens | 23 Currently this module provides one function: open. This function opens |
| 24 an instance. | 24 a tracker. Note that trackers used to be called instances. |
| 25 ''' | 25 ''' |
| 26 | 26 |
| 27 import imp, os | 27 import imp, os |
| 28 | 28 |
| 29 class InstanceError(Exception): | |
| 30 pass | |
| 31 | |
| 29 class Opener: | 32 class Opener: |
| 30 def __init__(self): | 33 def __init__(self): |
| 31 self.number = 0 | 34 self.number = 0 |
| 32 self.instances = {} | 35 self.trackers = {} |
| 33 | 36 |
| 34 def open(self, instance_home): | 37 def open(self, tracker_home): |
| 35 '''Open the instance. | 38 ''' Open the tracker. |
| 36 | 39 |
| 37 Raise ValueError if the instance home doesn't exist. | 40 Raise ValueError if the tracker home doesn't exist. |
| 38 ''' | 41 ''' |
| 39 if not os.path.exists(instance_home): | 42 if not os.path.exists(tracker_home): |
| 40 raise ValueError, 'no such directory: "%s"'%instance_home | 43 raise ValueError, 'no such directory: "%s"'%tracker_home |
| 41 if self.instances.has_key(instance_home): | 44 if self.trackers.has_key(tracker_home): |
| 42 return imp.load_package(self.instances[instance_home], | 45 return imp.load_package(self.trackers[tracker_home], |
| 43 instance_home) | 46 tracker_home) |
| 44 self.number = self.number + 1 | 47 self.number = self.number + 1 |
| 45 modname = '_roundup_instance_%s'%self.number | 48 modname = '_roundup_tracker_%s'%self.number |
| 46 self.instances[instance_home] = modname | 49 self.trackers[tracker_home] = modname |
| 47 return imp.load_package(modname, instance_home) | 50 |
| 51 # load the tracker | |
| 52 tracker = imp.load_package(modname, tracker_home) | |
| 53 | |
| 54 # ensure the tracker has all the required bits | |
| 55 for required in 'config open init Client MailGW'.split(): | |
| 56 if not hasattr(tracker, required): | |
| 57 raise InstanceError, 'Required tracker attribute "%s" '\ | |
| 58 'missing'%required | |
| 59 | |
| 60 return tracker | |
| 48 | 61 |
| 49 opener = Opener() | 62 opener = Opener() |
| 50 open = opener.open | 63 open = opener.open |
| 51 | 64 |
| 52 del Opener | 65 del Opener |