/usr/lib/python2.7/dist-packages/shinken/complexexpression.py is in shinken-common 1.4-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 | #!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (C) 2009-2012:
# Gabes Jean, naparuba@gmail.com
# Gerhard Lausser, Gerhard.Lausser@consol.de
# Gregory Starck, g.starck@gmail.com
# Hartmut Goebel, h.goebel@goebel-consult.de
#
# This file is part of Shinken.
#
# Shinken is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Shinken is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with Shinken. If not, see <http://www.gnu.org/licenses/>.
import re
from shinken.util import strip_and_uniq
"""
Here is a node class for complex_expression(s) and a factory to create them
"""
class ComplexExpressionNode(object):
def __init__(self):
self.operand = None
self.sons = []
self.configuration_errors = []
self.not_value = False
# If leaf, the content will be the hostgroup or hosts
# that are selected with this node
self.leaf = False
self.content = None
def __str__(self):
if not self.leaf:
return "Op:'%s' Leaf:%s Sons:'[%s] IsNot:%s'" % (self.operand, self.leaf, ','.join([str(s) for s in self.sons]), self.not_value)
else:
return 'IS LEAF %s' % self.content
def resolve_elements(self):
# If it's a leaf, we just need to dump a set with the content of the node
if self.leaf:
#print "Is a leaf", self.content
if not self.content:
return set()
return set(self.content)
# first got the not ones in a list, and the other in the other list
not_nodes = [s for s in self.sons if s.not_value]
positiv_nodes = [s for s in self.sons if not s.not_value] # ok a not not is hard to read...
#print "Not nodes", not_nodes
#print "Positiv nodes", positiv_nodes
# By default we are using a OR rule
if not self.operand:
self.operand = '|'
res = set()
#print "Will now merge all of this", self.operand
# The operand will change the positiv loop only
i = 0
for n in positiv_nodes:
node_members = n.resolve_elements()
if self.operand == '|':
#print "OR rule", node_members
res = res.union(node_members)
elif self.operand == '&':
#print "AND RULE", node_members
# The first elements of an AND rule should be used
if i == 0:
res = node_members
else:
res = res.intersection(node_members)
i += 1
# And we finally remove all NOT elements from the result
for n in not_nodes:
node_members = n.resolve_elements()
res = res.difference(node_members)
return res
# Check for empty (= not found) leaf nodes
def is_valid(self):
valid = True
if not self.sons:
valid = False
else:
for s in self.sons:
if isinstance(s, DependencyNode) and not s.is_valid():
self.configuration_errors.extend(s.configuration_errors)
valid = False
return valid
""" TODO: Add some comment about this class for the doc"""
class ComplexExpressionFactory(object):
def __init__(self, ctx='hostgroups', grps=None, all_elements=None):
self.ctx = ctx
self.grps = grps
self.all_elements = all_elements
# the () will be eval in a recursiv way, only one level of ()
def eval_cor_pattern(self, pattern):
pattern = pattern.strip()
#print "eval_cor_pattern::", pattern
complex_node = False
# Look if it's a complex pattern (with rule) or
# if it's a leaf ofit, like a host/service
for m in '()+&|,':
if m in pattern:
complex_node = True
node = ComplexExpressionNode()
#print "Is so complex?", complex_node, pattern, node
# if it's a single expression like !linux or production
# we will get the objects from it and return a leaf node
if not complex_node:
# If it's a not value, tag the node and find
# the name without this ! operator
if pattern.startswith('!'):
node.not_value = True
pattern = pattern[1:]
node.operand = self.ctx
node.leaf = True
obj, error = self.find_object(pattern)
if obj is not None:
node.content = obj
else:
node.configuration_errors.append(error)
return node
in_par = False
tmp = ''
stacked_par = 0
for c in pattern:
#print "MATCHING", c
if c == ',' or c == '|':
# Maybe we are in a par, if so, just stack it
if in_par:
#print ", in a par, just staking it"
tmp += c
else:
# Oh we got a real cut in an expression, if so, cut it
#print "REAL , for cutting"
tmp = tmp.strip()
node.operand = '|'
if tmp != '':
#print "Will analyse the current str", tmp
o = self.eval_cor_pattern(tmp)
node.sons.append(o)
tmp = ''
elif c == '&' or c == '+':
# Maybe we are in a par, if so, just stack it
if in_par:
#print " & in a par, just staking it"
tmp += c
else:
# Oh we got a real cut in an expression, if so, cut it
#print "REAL & for cutting"
tmp = tmp.strip()
node.operand = '&'
if tmp != '':
#print "Will analyse the current str", tmp
o = self.eval_cor_pattern(tmp)
node.sons.append(o)
tmp = ''
elif c == '(':
stacked_par += 1
#print "INCREASING STACK TO", stacked_par
in_par = True
tmp = tmp.strip()
# Maybe we just start a par, but we got some things in tmp
# that should not be good in fact !
if stacked_par == 1 and tmp != '':
#TODO : real error
print "ERROR : bad expression near", tmp
continue
# If we are already in a par, add this (
# but not if it's the first one so
if stacked_par > 1:
tmp += c
#o = self.eval_cor_pattern(tmp)
#print "1( I've %s got new sons" % pattern , o
#node.sons.append(o)
elif c == ')':
#print "Need closeing a sub expression?", tmp
stacked_par -= 1
if stacked_par < 0:
# TODO : real error
print "Error : bad expression near", tmp, "too much ')'"
continue
if stacked_par == 0:
#print "THIS is closing a sub compress expression", tmp
tmp = tmp.strip()
o = self.eval_cor_pattern(tmp)
node.sons.append(o)
in_par = False
# OK now clean the tmp so we start clean
tmp = ''
continue
# ok here we are still in a huge par, we just close one sub one
tmp += c
# Maybe it's a classic character, if so, continue
else:
tmp += c
# Be sure to manage the trainling part when the line is done
tmp = tmp.strip()
if tmp != '':
#print "Managing trainling part", tmp
o = self.eval_cor_pattern(tmp)
#print "4end I've %s got new sons" % pattern , o
node.sons.append(o)
#print "End, tmp", tmp
#print "R %s:" % pattern, node
return node
# We've got an object, like super-grp, so we should link th group here
def find_object(self, pattern):
obj = None
error = None
pattern = pattern.strip()
if pattern == '*':
obj = [h.host_name for h in self.all_elements.items.values()
if getattr(h, 'host_name', '') != '' and not h.is_tpl()]
return obj, error
# Ok a more classic way
#print "GRPS", self.grps
if self.ctx == 'hostgroups':
# Ok try to find this hostgroup
hg = self.grps.find_by_name(pattern)
# Maybe it's an known one?
if not hg:
error = "Error : cannot find the %s of the expression '%s'" % (self.ctx, pattern)
return hg, error
# Ok the group is found, get the elements!
elts = hg.get_hosts().split(',')
elts = strip_and_uniq(elts)
# Maybe the hostgroup memebrs is '*', if so expand with all hosts
if '*' in elts:
elts.extend([h.host_name for h in self.all_elements.items.values()
if getattr(h, 'host_name', '') != '' and not h.is_tpl()])
# And remove this strange hostname too :)
elts.remove('*')
return elts, error
else: #templates
obj = self.grps.find_hosts_that_use_template(pattern)
return obj, error
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