Mercurial > hg > toolbox
annotate toolbox/model.py @ 13:2d05ad362637
py3
author | Jeff Hammel <k0scist@gmail.com> |
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date | Tue, 24 Nov 2020 13:11:51 -0800 |
parents | c280a43ac442 |
children | 8e13c2f6c2d7 |
rev | line source |
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import from git://github.com/mozilla/toolbox.git
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1 """ |
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2 models for toolbox |
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3 """ |
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4 |
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5 import couchdb |
13 | 6 import json |
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7 import os |
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8 import pyes |
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9 import sys |
13 | 10 |
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11 from copy import deepcopy |
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12 from time import time |
13 | 13 from .search import WhooshSearch |
14 from .util import str2filename | |
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15 |
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16 # TODO: types of fields: |
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17 # - string: a single string: {'type': 'string', 'name': 'name', 'required': True} |
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18 # - field: a list of strings: {'type': 'field', 'name', 'usage'} |
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19 # - dict: a subclassifier: {'type': '???', 'name': 'url', 'required': True} |
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20 # - computed values, such as modified |
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21 |
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22 class ProjectsModel(object): |
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23 """ |
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24 abstract base class for toolbox tools |
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25 """ |
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26 |
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27 def __init__(self, fields=None, required=('name', 'description', 'url'), |
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28 whoosh_index=None): |
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29 """ |
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30 - fields : list of fields to use, or None to calculate dynamically |
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31 - required : required data (strings) |
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32 - whoosh_index : directory to keep whoosh index in |
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33 """ |
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34 self.required = set(required) |
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35 |
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36 # reserved fields |
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37 self.reserved = self.required.copy() |
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38 self.reserved.update(['modified']) # last modified, a computed value |
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39 self.search = WhooshSearch(whoosh_index=whoosh_index) |
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40 |
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41 # classifier fields |
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42 self._fields = fields |
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43 self.field_set = set(fields or ()) |
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44 |
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45 def update_search(self, project): |
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46 """update the search index""" |
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47 assert self.required.issubset(project.keys()) # XXX should go elsewhere |
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48 fields = dict([(field, project[field]) |
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49 for field in self.fields() |
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50 if field in project]) |
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51 |
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52 # keys must be strings, not unicode, on some systems |
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53 f = dict([(str(i), j) for i, j in fields.items()]) |
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54 |
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55 self.search.update(name=project['name'], description=project['description'], **f) |
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56 |
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57 def fields(self): |
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58 """what fields does the model support?""" |
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59 if self._fields is not None: |
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60 return self._fields |
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61 return list(self.field_set) |
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62 |
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63 def projects(self): |
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64 """list of all projects""" |
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65 return [i['name'] for i in self.get()] |
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66 |
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67 def export(self, other): |
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68 """export the current model to another model instance""" |
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69 for project in self.get(): |
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70 other.update(project) |
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71 |
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72 def rename_field_value(self, field, from_value, to_value): |
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73 projects = self.get(None, **{field: from_value}) |
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74 for project in projects: |
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75 project[field].remove(from_value) |
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76 project[field].append(to_value) |
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77 self.update(project) |
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78 |
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79 ### implementor methods |
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80 |
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81 def update(self, project): |
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82 """update a project""" |
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83 raise NotImplementedError |
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84 |
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85 def get(self, search=None, **query): |
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86 """ |
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87 get a list of projects matching a query |
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88 the query should be key, value pairs to match; |
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89 if the value is single, it should be a string; |
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90 if the value is multiple, it should be a set which will be |
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91 ANDed together |
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92 """ |
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93 raise NotImplementedError |
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94 |
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95 def project(self, name): |
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96 """get a project of a particular name, or None if there is none""" |
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97 raise NotImplementedError |
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98 |
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99 def field_query(self, field): |
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100 """get projects according to a particular field, or None""" |
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101 raise NotImplementedError |
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102 |
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103 def delete(self, project): |
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104 raise NotImplementedError |
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105 |
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106 |
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107 class MemoryCache(ProjectsModel): |
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108 """ |
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109 sample implementation keeping everything in memory |
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110 """ |
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111 |
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112 def __init__(self, fields=None, whoosh_index=None): |
11 | 113 |
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114 ProjectsModel.__init__(self, fields=fields, whoosh_index=whoosh_index) |
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115 |
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116 # indices |
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117 self._projects = {} |
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118 self.index = {} |
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119 self.load() |
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120 |
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121 def update(self, project, load=False): |
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123 if project['name'] in self._projects and project == self._projects[project['name']]: |
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124 return # nothing to do |
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125 if not load: |
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126 project['modified'] = time() |
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127 if self._fields is None: |
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128 fields = [i for i in project if i not in self.reserved] |
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129 self.field_set.update(fields) |
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130 else: |
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131 fields = self._fields |
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132 for field in fields: |
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133 for key, _set in self.index.get(field, {}).items(): |
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134 _set.discard(project['name']) |
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135 if not _set: |
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136 self.index[field].pop(key) |
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137 if field not in project: |
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138 continue |
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139 project[field] = list(set([i.strip() for i in project[field] if i.strip()])) |
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140 index = self.index.setdefault(field, {}) |
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141 values = project[field] |
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142 if isinstance(values, basestring): |
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143 values = [values] |
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144 for value in values: |
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145 index.setdefault(value, set()).update([project['name']]) |
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146 self._projects[project['name']] = deepcopy(project) |
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147 self.update_search(project) |
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148 if not load: |
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149 self.save(project) |
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150 |
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151 def get(self, search=None, **query): |
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152 """ |
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153 - search: text search |
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154 - query: fields to match |
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155 """ |
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156 order = None |
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157 if search: |
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158 results = self.search(search) |
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159 order = dict([(j,i) for i,j in enumerate(results)]) |
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160 else: |
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161 results = self._projects.keys() |
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162 results = set(results) |
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163 for key, values in query.items(): |
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164 if isinstance(values, basestring): |
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165 values = [values] |
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166 for value in values: |
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167 results.intersection_update(self.index.get(key, {}).get(value, set())) |
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168 if order: |
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169 # preserve search order |
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170 results = sorted(list(results), key=lambda x: order[x]) |
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171 return [deepcopy(self._projects[project]) for project in results] |
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172 |
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173 |
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174 def project(self, name): |
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175 if name in self._projects: |
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176 return deepcopy(self._projects[name]) |
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177 |
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178 def field_query(self, field): |
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179 if field in self.index: |
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180 return deepcopy(self.index.get(field)) |
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181 |
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182 def delete(self, project): |
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|
183 """ |
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Jeff Hammel <k0scist@gmail.com>
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184 delete a project |
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185 - project : name of the project |
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186 """ |
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187 if project not in self._projects: |
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188 return |
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189 del self._projects[project] |
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190 for field, classifiers in self.index.items(): |
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191 for key, values in classifiers.items(): |
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192 classifiers[key].discard(project) |
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193 if not classifiers[key]: |
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|
194 del classifiers[key] |
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195 self.search.delete(project) |
11 | 196 |
0
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197 def load(self): |
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198 """for subclasses; in memory, load nothing""" |
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199 |
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200 def save(self, project): |
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201 """for subclasses; in memory, save nothing""" |
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202 |
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|
203 |
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204 class FileCache(MemoryCache): |
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205 """save in JSON blob directory""" |
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|
206 |
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207 def __init__(self, directory, fields=None, whoosh_index=None): |
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|
208 """ |
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|
209 - directory: directory of .json tool files |
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|
210 """ |
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|
211 # JSON blob directory |
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|
212 if not os.path.exists(directory): |
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213 os.makedirs(directory) |
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|
214 assert os.path.isdir(directory) |
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|
215 self.directory = directory |
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parents:
diff
changeset
|
216 |
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import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
217 self.files = {} |
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parents:
diff
changeset
|
218 MemoryCache.__init__(self, fields=fields, whoosh_index=whoosh_index) |
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|
219 |
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Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
220 def delete(self, project): |
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parents:
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changeset
|
221 MemoryCache.delete(self, project) |
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|
222 os.remove(os.path.join(self.directory, self.files.pop(project))) |
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|
223 |
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import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
224 def load(self): |
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import from git://github.com/mozilla/toolbox.git
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parents:
diff
changeset
|
225 """load JSON from the directory""" |
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import from git://github.com/mozilla/toolbox.git
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|
226 for i in os.listdir(self.directory): |
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import from git://github.com/mozilla/toolbox.git
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|
227 if not i.endswith('.json'): |
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|
228 continue |
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diff
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|
229 filename = os.path.join(self.directory, i) |
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import from git://github.com/mozilla/toolbox.git
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parents:
diff
changeset
|
230 try: |
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import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
231 project = json.loads(file(filename).read()) |
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import from git://github.com/mozilla/toolbox.git
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|
232 except: |
11 | 233 print('File: {}'.format(i)) |
0
b0942f44413f
import from git://github.com/mozilla/toolbox.git
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parents:
diff
changeset
|
234 raise |
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import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
235 self.files[project['name']] = i |
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import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
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changeset
|
236 self.update(project, load='modified' in project) |
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import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
237 |
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import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
238 def save(self, project): |
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Jeff Hammel <k0scist@gmail.com>
parents:
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changeset
|
239 |
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import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
240 filename = self.files.get(project['name']) |
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import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
241 if not filename: |
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import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
242 filename = str2filename(project['name']) + '.json' |
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import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
243 filename = filename.encode('ascii', 'ignore') |
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parents:
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changeset
|
244 filename = os.path.join(self.directory, filename) |
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import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
245 try: |
12 | 246 with open(filename, 'w') as f: |
247 f.write(json.dumps(project)) | |
248 except Exception as e: | |
249 print('{} {}'.format(filename, repr(filename))) | |
0
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import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
250 raise |
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import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
251 |
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import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
252 |
b0942f44413f
import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
253 class ElasticSearchCache(MemoryCache): |
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Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
254 """ |
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import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
255 store json in ElasticSearch |
b0942f44413f
import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
256 """ |
b0942f44413f
import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
257 |
b0942f44413f
import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
258 def __init__(self, |
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Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
259 server="localhost:9200", |
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import from git://github.com/mozilla/toolbox.git
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
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260 es_index="toolbox", |
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261 doc_type="projects", |
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262 fields=None, |
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263 whoosh_index=None): |
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264 self.es_index = es_index |
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265 self.doc_type = doc_type |
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266 |
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267 try: |
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268 self.es = pyes.ES([server]) |
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269 self.es.create_index(self.es_index) |
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270 except pyes.urllib3.connectionpool.MaxRetryError: |
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271 raise Exception("Could not connect to ES instance") |
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272 except pyes.exceptions.ElasticSearchException: |
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273 # this just means the index already exists |
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274 pass |
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275 MemoryCache.__init__(self, fields=fields, whoosh_index=whoosh_index) |
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276 |
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277 def es_query(self, query): |
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278 """make an ElasticSearch query and return the results""" |
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279 search = pyes.Search(query) |
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280 results = self.es.search(query=search, |
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281 indexes=[self.es_index], |
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282 doc_types=[self.doc_type], |
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283 size=0) |
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284 |
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285 # the first query is just used to determine the size of the set |
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286 if not 'hits' in results and not 'total' in results['hits']: |
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287 raise Exception("bad ES response %s" % json.dumps(results)) |
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288 total = results['hits']['total'] |
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289 |
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290 # repeat the query to retrieve the entire set |
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291 results = self.es.search(query=search, |
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292 indexes=[self.es_index], |
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293 doc_types=[self.doc_type], |
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294 size=total) |
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295 |
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296 if not 'hits' in results and not 'hits' in results['hits']: |
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297 raise Exception("bad ES response %s" % json.dumps(results)) |
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298 |
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299 return results |
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300 |
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301 def load(self): |
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302 """load all json documents from ES:toolbox/projects""" |
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303 query = pyes.MatchAllQuery() |
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304 results = self.es_query(query) |
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305 |
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306 for hit in results['hits']['hits']: |
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307 self.update(hit['_source'], True) |
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308 |
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309 def save(self, project): |
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310 query = pyes.FieldQuery() |
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311 query.add('name', project['name']) |
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312 results = self.es_query(query) |
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313 |
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314 # If there is an existing records in ES with the same |
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315 # project name, update that record. Otherwise create a new record. |
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316 id = None |
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317 if results['hits']['hits']: |
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318 id = results['hits']['hits'][0]['_id'] |
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319 |
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320 self.es.index(project, self.es_index, self.doc_type, id) |
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321 |
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322 def delete(self, project): |
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323 MemoryCache.delete(self, project) |
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324 query = pyes.FieldQuery() |
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325 query.add('name', project['name']) |
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326 results = self.es_query(query) |
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327 if results['hits']['hits']: |
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328 id = results['hits']['hits'][0]['_id'] |
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329 self.es.delete(self.es_index, self.doc_type, id) |
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330 |
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331 |
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332 class CouchCache(MemoryCache): |
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333 """ |
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334 store json files in couchdb |
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335 """ |
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336 |
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337 def __init__(self, |
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338 server="http://127.0.0.1:5984", |
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339 dbname="toolbox", |
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340 fields=None, |
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341 whoosh_index=None): |
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342 |
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343 # TODO: check if server is running |
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344 couchserver = couchdb.Server(server) |
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345 try: |
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346 self.db = couchserver[dbname] |
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347 except couchdb.ResourceNotFound: # XXX should not be a blanket except! |
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348 self.db = couchserver.create(dbname) |
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349 except: |
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350 raise Exception("Could not connect to couch instance. Make sure that you have couch running at %s and that you have database create priveleges if '%s' does not exist" % (server, dbname)) |
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351 MemoryCache.__init__(self, fields=fields, whoosh_index=whoosh_index) |
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352 |
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353 def load(self): |
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354 """load JSON objects from CouchDB docs""" |
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355 for id in self.db: |
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356 doc = self.db[id] |
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357 try: |
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358 project = doc['project'] |
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359 except KeyError: |
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360 continue # it's prob a design doc |
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361 self.update(project, load=True) |
11 | 362 |
0
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363 def save(self, project): |
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364 name = project['name'] |
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365 try: |
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366 updated = self.db[name] |
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367 except: |
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368 updated = {} |
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369 updated['project'] = project |
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370 self.db[name] = updated |
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371 |
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372 def delete(self, project): |
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373 MemoryCache.delete(self, project) |
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374 del self.db[project] |
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375 |
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376 # directory of available models |
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377 models = {'memory_cache': MemoryCache, |
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378 'file_cache': FileCache, |
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379 'couch': CouchCache, |
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380 'es': ElasticSearchCache} |
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|
381 |
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382 def convert(args=sys.argv[1:]): |
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383 """CLI front-end for model conversion""" |
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|
384 from optparse import OptionParser |
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Jeff Hammel <k0scist@gmail.com>
parents:
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385 usage = '%prog [global-options] from_model [options] to_model [options]' |
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386 description = "export data from one model to another" |
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387 parser = OptionParser(usage=usage, description=description) |
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388 parser.disable_interspersed_args() |
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389 parser.add_option('-l', '--list-models', dest='list_models', |
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390 action='store_true', default=False, |
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391 help="list available models") |
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392 parser.add_option('-a', '--list-args', dest='list_args', |
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393 metavar='MODEL', |
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394 help="list arguments for a model") |
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395 |
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396 options, args = parser.parse_args(args) |
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397 |
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398 # process global options |
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399 if options.list_models: |
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400 for name in sorted(models.keys()): |
12 | 401 print(name) |
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402 parser.exit() |
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403 if options.list_args: |
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404 if not options.list_args in models: |
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405 parser.error("Model '%s' not found. (Choose from: %s)" % (options.list_args, models.keys())) |
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406 ctor = models[options.list_args].__init__ |
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407 import inspect |
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408 argspec = inspect.getargspec(ctor) |
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409 defaults = [[i, None] for i in argspec.args[1:]] # ignore self |
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410 for index, value in enumerate(reversed(argspec.defaults), 1): |
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411 defaults[-index][-1] = value |
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412 defaults = [[i,j] for i, j in defaults if i != 'fields'] |
12 | 413 print('%s arguments:' % options.list_args) |
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414 for arg, value in defaults: |
12 | 415 print(' -%s %s' % (arg, value or '')) |
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416 parser.exit() |
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417 |
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418 # parse models and their ctor args |
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419 sects = [] |
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420 _models = [] |
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421 for arg in args: |
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422 if arg.startswith('-'): |
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423 sects[-1].append(arg) |
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424 else: |
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425 _models.append(arg) |
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426 sects.append([]) |
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427 |
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428 # check models |
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429 if len(_models) != 2: |
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430 parser.error("Please provide two models. (You gave: %s)" % _models) |
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431 if not set(_models).issubset(models): |
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432 parser.error("Please use these models: %s (You gave: %s)" % (models, _models)) |
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433 |
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434 sects = [ [i.lstrip('-') for i in sect ] for sect in sects ] |
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435 |
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436 # require an equals sign |
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437 # XXX hacky but much easier to parse |
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438 if [ True for sect in sects |
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439 if [i for i in sect if '=' not in i] ]: |
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440 parser.error("All arguments must be `key=value`") |
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441 sects = [dict([i.split('=', 1) for i in sect]) for sect in sects] |
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442 |
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443 # instantiate models |
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444 from_model = models[_models[0]](**sects[0]) |
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445 to_model = models[_models[1]](**sects[1]) |
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446 |
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447 # convert the data |
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448 from_model.export(to_model) |
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449 |
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450 if __name__ == '__main__': |
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451 convert() |