root / logic / credits.py @ 583bfaa0
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1 | 48130e66 | Georgios Gousios | # Copyright 2011 GRNET S.A. All rights reserved.
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2 | 09c936a7 | Vassilios Karakoidas | #
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3 | 48130e66 | Georgios Gousios | # Redistribution and use in source and binary forms, with or without
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4 | 48130e66 | Georgios Gousios | # modification, are permitted provided that the following conditions
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5 | 48130e66 | Georgios Gousios | # are met:
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6 | 48130e66 | Georgios Gousios | #
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7 | 48130e66 | Georgios Gousios | # 1. Redistributions of source code must retain the above copyright
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8 | 48130e66 | Georgios Gousios | # notice, this list of conditions and the following disclaimer.
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9 | 48130e66 | Georgios Gousios | #
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10 | 48130e66 | Georgios Gousios | # 2. Redistributions in binary form must reproduce the above copyright
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11 | 48130e66 | Georgios Gousios | # notice, this list of conditions and the following disclaimer in the
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12 | 48130e66 | Georgios Gousios | # documentation and/or other materials provided with the distribution.
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13 | 09c936a7 | Vassilios Karakoidas | #
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14 | 48130e66 | Georgios Gousios | # THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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15 | 48130e66 | Georgios Gousios | # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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16 | 48130e66 | Georgios Gousios | # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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17 | 48130e66 | Georgios Gousios | # ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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18 | 48130e66 | Georgios Gousios | # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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19 | 48130e66 | Georgios Gousios | # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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20 | 48130e66 | Georgios Gousios | # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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21 | 48130e66 | Georgios Gousios | # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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22 | 48130e66 | Georgios Gousios | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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23 | 48130e66 | Georgios Gousios | # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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24 | 48130e66 | Georgios Gousios | # SUCH DAMAGE.
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25 | 09c936a7 | Vassilios Karakoidas | #
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26 | 48130e66 | Georgios Gousios | # The views and conclusions contained in the software and documentation are
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27 | 48130e66 | Georgios Gousios | # those of the authors and should not be interpreted as representing official
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28 | 48130e66 | Georgios Gousios | # policies, either expressed or implied, of GRNET S.A.
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29 | 48130e66 | Georgios Gousios | |
30 | 48130e66 | Georgios Gousios | # Business Logic for all Credit related activity
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31 | 92c53da1 | Vassilios Karakoidas | |
32 | 7b7f9205 | Vassilios Karakoidas | from datetime import datetime |
33 | 7b7f9205 | Vassilios Karakoidas | from django.db import transaction |
34 | c8926262 | Vassilios Karakoidas | |
35 | 234f8b07 | Vangelis Koukis | from synnefo.db.models import Debit, FlavorCost |
36 | 234f8b07 | Vangelis Koukis | |
37 | 7b7f9205 | Vassilios Karakoidas | @transaction.commit_on_success
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38 | 7b7f9205 | Vassilios Karakoidas | def debit_account(user , amount, vm, description): |
39 | 7b7f9205 | Vassilios Karakoidas | """Charges the user with the specified amount of credits for a vm (resource)"""
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40 | 92c53da1 | Vassilios Karakoidas | date_now = datetime.now() |
41 | 7b7f9205 | Vassilios Karakoidas | user.credit = user.credit - amount |
42 | 7b7f9205 | Vassilios Karakoidas | user.save() |
43 | 7b7f9205 | Vassilios Karakoidas | |
44 | 7b7f9205 | Vassilios Karakoidas | # then write the debit entry
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45 | 7b7f9205 | Vassilios Karakoidas | debit = Debit() |
46 | 7b7f9205 | Vassilios Karakoidas | debit.user = user |
47 | 7b7f9205 | Vassilios Karakoidas | debit.vm = vm |
48 | 7b7f9205 | Vassilios Karakoidas | debit.when = date_now |
49 | 7b7f9205 | Vassilios Karakoidas | debit.description = description |
50 | 7b7f9205 | Vassilios Karakoidas | debit.save() |
51 | 7b7f9205 | Vassilios Karakoidas | |
52 | 7b7f9205 | Vassilios Karakoidas | |
53 | 7b7f9205 | Vassilios Karakoidas | @transaction.commit_on_success
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54 | 7b7f9205 | Vassilios Karakoidas | def credit_account(self, amount, creditor, description): |
55 | 7b7f9205 | Vassilios Karakoidas | """No clue :)"""
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56 | 7b7f9205 | Vassilios Karakoidas | return
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57 | 92c53da1 | Vassilios Karakoidas | |
58 | 92c53da1 | Vassilios Karakoidas | |
59 | 92c53da1 | Vassilios Karakoidas | @transaction.commit_on_success
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60 | 92c53da1 | Vassilios Karakoidas | def charge(vm): |
61 | 92c53da1 | Vassilios Karakoidas | """Charges the owner of this VM.
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62 | 92c53da1 | Vassilios Karakoidas |
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63 | 92c53da1 | Vassilios Karakoidas | Charges the owner of a VM for the period
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64 | 92c53da1 | Vassilios Karakoidas | from vm.charged to datetime.now(), based on the
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65 | 92c53da1 | Vassilios Karakoidas | current operating state.
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66 | 92c53da1 | Vassilios Karakoidas |
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67 | 92c53da1 | Vassilios Karakoidas | """
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68 | 92c53da1 | Vassilios Karakoidas | charged_states = ('STARTED', 'STOPPED') |
69 | 92c53da1 | Vassilios Karakoidas | |
70 | 92c53da1 | Vassilios Karakoidas | start_datetime = vm.charged |
71 | 92c53da1 | Vassilios Karakoidas | vm.charged = datetime.now() |
72 | 92c53da1 | Vassilios Karakoidas | |
73 | 92c53da1 | Vassilios Karakoidas | # Only charge for a specific set of states
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74 | dfd19c2d | Vassilios Karakoidas | if vm.operstate in charged_states: |
75 | 92c53da1 | Vassilios Karakoidas | cost_list = [] |
76 | 92c53da1 | Vassilios Karakoidas | |
77 | 92c53da1 | Vassilios Karakoidas | # remember, we charge only for Started and Stopped
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78 | dfd19c2d | Vassilios Karakoidas | if vm.operstate == 'STARTED': |
79 | 8d97deff | Vassilios Karakoidas | cost_list = get_cost_active(vm.flavor, start_datetime, vm.charged) |
80 | dfd19c2d | Vassilios Karakoidas | elif vm.operstate == 'STOPPED': |
81 | 8d97deff | Vassilios Karakoidas | cost_list = get_cost_inactive(vm.flavor, start_datetime, vm.charged) |
82 | 92c53da1 | Vassilios Karakoidas | |
83 | 92c53da1 | Vassilios Karakoidas | # find the total vost
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84 | 92c53da1 | Vassilios Karakoidas | total_cost = sum([x[1] for x in cost_list]) |
85 | 92c53da1 | Vassilios Karakoidas | |
86 | 92c53da1 | Vassilios Karakoidas | # add the debit entry
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87 | dfd19c2d | Vassilios Karakoidas | description = "Server = %s, charge = %d for state: %s" % (vm.name, total_cost, vm.operstate)
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88 | 92c53da1 | Vassilios Karakoidas | debit_account(vm.owner, total_cost, vm, description) |
89 | 92c53da1 | Vassilios Karakoidas | |
90 | 92c53da1 | Vassilios Karakoidas | vm.save() |
91 | 111b2cda | Vassilios Karakoidas | |
92 | 8d97deff | Vassilios Karakoidas | |
93 | 111b2cda | Vassilios Karakoidas | def get_costs(vm, start_datetime, end_datetime, active): |
94 | 111b2cda | Vassilios Karakoidas | """Return a list with FlavorCost objects for the specified duration"""
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95 | 111b2cda | Vassilios Karakoidas | def between(enh_fc, a_date): |
96 | 111b2cda | Vassilios Karakoidas | """Checks if a date is between a FlavorCost duration"""
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97 | 111b2cda | Vassilios Karakoidas | if enh_fc.effective_from <= a_date and enh_fc.effective_to is None: |
98 | 111b2cda | Vassilios Karakoidas | return True |
99 | 111b2cda | Vassilios Karakoidas | |
100 | 111b2cda | Vassilios Karakoidas | return enh_fc.effective_from <= a_date and enh_fc.effective_to >= a_date |
101 | 111b2cda | Vassilios Karakoidas | |
102 | 111b2cda | Vassilios Karakoidas | # Get the related FlavorCost objects, sorted.
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103 | 111b2cda | Vassilios Karakoidas | price_list = FlavorCost.objects.filter(flavor=vm).order_by('effective_from')
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104 | 111b2cda | Vassilios Karakoidas | |
105 | 111b2cda | Vassilios Karakoidas | # add the extra field FlavorCost.effective_to
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106 | 111b2cda | Vassilios Karakoidas | for idx in range(0, len(price_list)): |
107 | 111b2cda | Vassilios Karakoidas | if idx + 1 == len(price_list): |
108 | 111b2cda | Vassilios Karakoidas | price_list[idx].effective_to = None
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109 | 111b2cda | Vassilios Karakoidas | else:
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110 | 111b2cda | Vassilios Karakoidas | price_list[idx].effective_to = price_list[idx + 1].effective_from
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111 | 111b2cda | Vassilios Karakoidas | |
112 | 111b2cda | Vassilios Karakoidas | price_result = [] |
113 | 111b2cda | Vassilios Karakoidas | found_start = False
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114 | 111b2cda | Vassilios Karakoidas | |
115 | 111b2cda | Vassilios Karakoidas | # Find the affected FlavorCost, according to the
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116 | 111b2cda | Vassilios Karakoidas | # dates, and put them in price_result
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117 | 111b2cda | Vassilios Karakoidas | for p in price_list: |
118 | 111b2cda | Vassilios Karakoidas | if between(p, start_datetime):
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119 | 111b2cda | Vassilios Karakoidas | found_start = True
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120 | 111b2cda | Vassilios Karakoidas | p.effective_from = start_datetime |
121 | 111b2cda | Vassilios Karakoidas | if between(p, end_datetime):
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122 | 111b2cda | Vassilios Karakoidas | p.effective_to = end_datetime |
123 | 111b2cda | Vassilios Karakoidas | price_result.append(p) |
124 | 111b2cda | Vassilios Karakoidas | break
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125 | 111b2cda | Vassilios Karakoidas | if found_start:
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126 | 111b2cda | Vassilios Karakoidas | price_result.append(p) |
127 | 111b2cda | Vassilios Karakoidas | |
128 | 111b2cda | Vassilios Karakoidas | results = [] |
129 | 111b2cda | Vassilios Karakoidas | |
130 | 111b2cda | Vassilios Karakoidas | # Create the list and the result tuples
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131 | 111b2cda | Vassilios Karakoidas | for p in price_result: |
132 | 111b2cda | Vassilios Karakoidas | if active:
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133 | 111b2cda | Vassilios Karakoidas | cost = p.cost_active |
134 | 111b2cda | Vassilios Karakoidas | else:
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135 | 111b2cda | Vassilios Karakoidas | cost = p.cost_inactive |
136 | 111b2cda | Vassilios Karakoidas | |
137 | c8926262 | Vassilios Karakoidas | results.append( ( p.effective_from, calculate_cost(p.effective_from, p.effective_to, cost)) ) |
138 | 111b2cda | Vassilios Karakoidas | |
139 | 111b2cda | Vassilios Karakoidas | return results
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140 | c8926262 | Vassilios Karakoidas | |
141 | c8926262 | Vassilios Karakoidas | |
142 | c8926262 | Vassilios Karakoidas | def calculate_cost(start_date, end_date, cost): |
143 | c8926262 | Vassilios Karakoidas | """Calculate the total cost for the specified duration"""
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144 | c8926262 | Vassilios Karakoidas | td = end_date - start_date |
145 | c8926262 | Vassilios Karakoidas | sec = float(td.microseconds + (td.seconds + td.days * 24 * 3600) * 10**6) / float(10**6) |
146 | c8926262 | Vassilios Karakoidas | total_hours = float(sec) / float(60.0*60.0) |
147 | c8926262 | Vassilios Karakoidas | total_cost = float(cost)*total_hours
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148 | c8926262 | Vassilios Karakoidas | |
149 | c8926262 | Vassilios Karakoidas | return round(total_cost) |
150 | 8d97deff | Vassilios Karakoidas | |
151 | 8d97deff | Vassilios Karakoidas | |
152 | 8d97deff | Vassilios Karakoidas | def get_cost_active(vm, start_datetime, end_datetime): |
153 | 8d97deff | Vassilios Karakoidas | """Returns a list with the active costs for the specified duration"""
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154 | 8d97deff | Vassilios Karakoidas | return get_costs(vm, start_datetime, end_datetime, True) |
155 | 8d97deff | Vassilios Karakoidas | |
156 | 8d97deff | Vassilios Karakoidas | |
157 | 8d97deff | Vassilios Karakoidas | def get_cost_inactive(vm, start_datetime, end_datetime): |
158 | 8d97deff | Vassilios Karakoidas | """Returns a list with the inactive costs for the specified duration"""
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159 | 8d97deff | Vassilios Karakoidas | return get_costs(vm, start_datetime, end_datetime, False) |