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BF: make sorting of date templates stable

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Before, it would first do stable sort followed with explicit reverse.
Now reverse is given as an argument to sort, and it results in actually
preserving the order in case of e.g. no sorting needed
This commit is contained in:
Yaroslav Halchenko 2012-12-11 11:04:40 -05:00
parent 7bd977e2df
commit 2b6366656f
2 changed files with 11 additions and 2 deletions
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5
server/datedetector.py
View file

@ -194,7 +194,8 @@ class DateDetector:
self.__lock.acquire()
try:
logSys.debug("Sorting the template list")
self.__templates.sort(lambda x, y: cmp(x.getHits(), y.getHits()))
self.__templates.reverse()
self.__templates.sort(lambda x, y: cmp(x.getHits(), y.getHits()), reverse=True)
t = self.__templates[0]
logSys.debug("Winning template: %s with %d hits" % (t.getName(), t.getHits()))
finally:
self.__lock.release()

8
testcases/datedetectortestcase.py
View file

@ -78,6 +78,14 @@ class DateDetectorTest(unittest.TestCase):
self.assertEqual(self.__datedetector.getTime(log)[:6], date[:6])
self.assertEqual(self.__datedetector.getUnixTime(log), dateUnix)
def testStableSortTemplate(self):
old_names = [x.getName() for x in self.__datedetector.getTemplates()]
self.__datedetector.sortTemplate()
# If there were no hits -- sorting should not change the order
for old_name, n in zip(old_names, self.__datedetector.getTemplates()):
self.assertEqual(old_name, n.getName()) # "Sort must be stable"
# def testDefaultTempate(self):
# self.__datedetector.setDefaultRegex("^\S{3}\s{1,2}\d{1,2} \d{2}:\d{2}:\d{2}")
# self.__datedetector.setDefaultPattern("%b %d %H:%M:%S")