/usr/lib/python2.7/dist-packages/Bcfg2/Reporting/utils.py is in bcfg2-server 1.4.0~pre2+git141-g6d40dace6358-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 | """Helper functions for reports"""
import re
"""List of filters provided by filteredUrls"""
filter_list = ('server', 'state', 'group')
class BatchFetch(object):
"""Fetch Django objects in smaller batches to save memory"""
def __init__(self, obj, step=10000):
self.count = 0
self.block_count = 0
self.obj = obj
self.data = None
self.step = step
self.max = obj.count()
def __iter__(self):
return self
def next(self):
"""Provide compatibility with python < 3.0"""
return self.__next__()
def __next__(self):
"""Return the next object from our array and fetch from the
database when needed"""
if self.block_count + self.count - self.step == self.max:
raise StopIteration
if self.block_count == 0 or self.count == self.step:
# Without list() this turns into LIMIT 1 OFFSET x queries
self.data = list(self.obj.all()[self.block_count: \
(self.block_count + self.step)])
self.block_count += self.step
self.count = 0
self.count += 1
return self.data[self.count - 1]
def generateUrls(fn):
"""
Parse url tuples and send to functions.
Decorator for url generators. Handles url tuple parsing
before the actual function is called.
"""
def url_gen(*urls):
results = []
for url_tuple in urls:
if isinstance(url_tuple, (list, tuple)):
results += fn(*url_tuple)
else:
raise ValueError("Unable to handle compiled urls")
return results
return url_gen
@generateUrls
def paginatedUrls(pattern, view, kwargs=None, name=None):
"""
Takes a group of url tuples and adds paginated urls.
Extends a url tuple to include paginated urls.
Currently doesn't handle url() compiled patterns.
"""
results = [(pattern, view, kwargs, name)]
tail = ''
mtail = re.search('(/+\+?\\*?\??\$?)$', pattern)
if mtail:
tail = mtail.group(1)
pattern = pattern[:len(pattern) - len(tail)]
results += [(pattern + "/(?P<page_number>\d+)" + tail, view, kwargs)]
results += [(pattern + "/(?P<page_number>\d+)\|(?P<page_limit>\d+)" +
tail, view, kwargs)]
if not kwargs:
kwargs = dict()
kwargs['page_limit'] = 0
results += [(pattern + "/?\|(?P<page_limit>all)" + tail, view, kwargs)]
return results
@generateUrls
def filteredUrls(pattern, view, kwargs=None, name=None):
"""
Takes a url and adds filtered urls.
Extends a url tuple to include filtered view urls. Currently doesn't
handle url() compiled patterns.
"""
results = [(pattern, view, kwargs, name)]
tail = ''
mtail = re.search('(/+\+?\\*?\??\$?)$', pattern)
if mtail:
tail = mtail.group(1)
pattern = pattern[:len(pattern) - len(tail)]
for filter in ('/state/(?P<state>\w+)',
'/group/(?P<group>[^/]+)',
'/group/(?P<group>[^/]+)/(?P<state>[A-Za-z]+)',
'/server/(?P<server>[^/]+)',
'/server/(?P<server>[^/]+)/(?P<state>[A-Za-z]+)',
'/server/(?P<server>[^/]+)/group/(?P<group>[^/]+)',
'/server/(?P<server>[^/]+)/group/(?P<group>[^/]+)/(?P<state>[A-Za-z]+)'):
results += [(pattern + filter + tail, view, kwargs)]
return results
@generateUrls
def timeviewUrls(pattern, view, kwargs=None, name=None):
"""
Takes a url and adds timeview urls
Extends a url tuple to include filtered view urls. Currently doesn't
handle url() compiled patterns.
"""
results = [(pattern, view, kwargs, name)]
tail = ''
mtail = re.search('(/+\+?\\*?\??\$?)$', pattern)
if mtail:
tail = mtail.group(1)
pattern = pattern[:len(pattern) - len(tail)]
for filter in ('/(?P<year>\d{4})-(?P<month>\d{2})-(?P<day>\d{2})/' + \
'(?P<hour>\d\d)-(?P<minute>\d\d)',
'/(?P<year>\d{4})-(?P<month>\d{2})-(?P<day>\d{2})'):
results += [(pattern + filter + tail, view, kwargs)]
return results
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