diff --git a/roundup/instance.py b/roundup/instance.py
index fb98b76537d1f9199f1efe93a0b1263763e35266..b87334065a9589cf2a5cc1ea4235b3e752010c0c 100644 (file)
--- a/roundup/instance.py
+++ b/roundup/instance.py
# BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
# SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
#
-# $Id: instance.py,v 1.6 2002-09-10 00:18:20 richard Exp $
+# $Id: instance.py,v 1.9 2002-09-20 01:20:31 richard Exp $
__doc__ = '''
-Instance handling (open instance).
+Tracker handling (open tracker).
Currently this module provides one function: open. This function opens
-an instance.
+a tracker. Note that trackers used to be called instances.
'''
import imp, os
+class TrackerError(Exception):
+ pass
+
class Opener:
def __init__(self):
self.number = 0
- self.instances = {}
+ self.trackers = {}
- def open(self, instance_home):
- '''Open the instance.
+ def open(self, tracker_home):
+ ''' Open the tracker.
- Raise ValueError if the instance home doesn't exist.
+ Raise ValueError if the tracker home doesn't exist.
'''
- if not os.path.exists(instance_home):
- raise ValueError, 'no such directory: "%s"'%instance_home
- if self.instances.has_key(instance_home):
- return imp.load_package(self.instances[instance_home],
- instance_home)
+ # sanity check existence of tracker home
+ if not os.path.exists(tracker_home):
+ raise ValueError, 'no such directory: "%s"'%tracker_home
+
+ # sanity check tracker home contents
+ for reqd in 'config dbinit select_db interfaces'.split():
+ if not os.path.exists(os.path.join(tracker_home, '%s.py'%reqd)):
+ raise TrackerError, 'File "%s.py" missing from tracker '\
+ 'home "%s"'%(reqd, tracker_home)
+
+ if self.trackers.has_key(tracker_home):
+ return imp.load_package(self.trackers[tracker_home],
+ tracker_home)
self.number = self.number + 1
- modname = '_roundup_instance_%s'%self.number
- self.instances[instance_home] = modname
- return imp.load_package(modname, instance_home)
+ modname = '_roundup_tracker_%s'%self.number
+ self.trackers[tracker_home] = modname
+
+ # load the tracker
+ tracker = imp.load_package(modname, tracker_home)
+
+ # ensure the tracker has all the required bits
+ for required in 'config open init Client MailGW'.split():
+ if not hasattr(tracker, required):
+ raise TrackerError, \
+ 'Required tracker attribute "%s" missing'%required
+
+ return tracker
opener = Opener()
open = opener.open