Mercurial > repos > guerler > springsuite

annotate planemo/lib/python3.7/site-packages/boto/sdb/domain.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
parents d30785e31577
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1 # Copyright (c) 2006,2007 Mitch Garnaat http://garnaat.org/
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2 #
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3 # Permission is hereby granted, free of charge, to any person obtaining a
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4 # copy of this software and associated documentation files (the
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5 # "Software"), to deal in the Software without restriction, including
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6 # without limitation the rights to use, copy, modify, merge, publish, dis-
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7 # tribute, sublicense, and/or sell copies of the Software, and to permit
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8 # persons to whom the Software is furnished to do so, subject to the fol-
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9 # lowing conditions:
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10 #
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11 # The above copyright notice and this permission notice shall be included
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12 # in all copies or substantial portions of the Software.
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13 #
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14 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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15 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
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16 # ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
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17 # SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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18 # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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19 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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20 # IN THE SOFTWARE.
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21 from __future__ import print_function
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22
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23 """
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24 Represents an SDB Domain
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25 """
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26
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27 from boto.sdb.queryresultset import SelectResultSet
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28 from boto.compat import six
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29
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30 class Domain(object):
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31
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32 def __init__(self, connection=None, name=None):
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33 self.connection = connection
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34 self.name = name
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35 self._metadata = None
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36
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37 def __repr__(self):
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38 return 'Domain:%s' % self.name
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39
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40 def __iter__(self):
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41 return iter(self.select("SELECT * FROM `%s`" % self.name))
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42
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43 def startElement(self, name, attrs, connection):
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44 return None
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45
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46 def endElement(self, name, value, connection):
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47 if name == 'DomainName':
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48 self.name = value
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49 else:
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50 setattr(self, name, value)
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51
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52 def get_metadata(self):
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53 if not self._metadata:
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54 self._metadata = self.connection.domain_metadata(self)
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55 return self._metadata
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56
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57 def put_attributes(self, item_name, attributes,
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58 replace=True, expected_value=None):
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59 """
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60 Store attributes for a given item.
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61
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62 :type item_name: string
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63 :param item_name: The name of the item whose attributes are being stored.
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64
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65 :type attribute_names: dict or dict-like object
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66 :param attribute_names: The name/value pairs to store as attributes
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67
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68 :type expected_value: list
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69 :param expected_value: If supplied, this is a list or tuple consisting
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70 of a single attribute name and expected value. The list can be
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71 of the form:
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72
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73 * ['name', 'value']
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74
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75 In which case the call will first verify that the attribute
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76 "name" of this item has a value of "value". If it does, the delete
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77 will proceed, otherwise a ConditionalCheckFailed error will be
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78 returned. The list can also be of the form:
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79
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80 * ['name', True|False]
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81
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82 which will simply check for the existence (True) or non-existence
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83 (False) of the attribute.
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84
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85 :type replace: bool
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86 :param replace: Whether the attribute values passed in will replace
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87 existing values or will be added as addition values.
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88 Defaults to True.
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89
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90 :rtype: bool
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91 :return: True if successful
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92 """
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93 return self.connection.put_attributes(self, item_name, attributes,
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94 replace, expected_value)
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95
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96 def batch_put_attributes(self, items, replace=True):
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97 """
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98 Store attributes for multiple items.
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99
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100 :type items: dict or dict-like object
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101 :param items: A dictionary-like object. The keys of the dictionary are
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102 the item names and the values are themselves dictionaries
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103 of attribute names/values, exactly the same as the
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104 attribute_names parameter of the scalar put_attributes
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105 call.
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106
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107 :type replace: bool
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108 :param replace: Whether the attribute values passed in will replace
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109 existing values or will be added as addition values.
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110 Defaults to True.
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111
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112 :rtype: bool
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113 :return: True if successful
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114 """
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115 return self.connection.batch_put_attributes(self, items, replace)
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116
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117 def get_attributes(self, item_name, attribute_name=None,
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118 consistent_read=False, item=None):
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119 """
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120 Retrieve attributes for a given item.
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121
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122 :type item_name: string
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123 :param item_name: The name of the item whose attributes are being retrieved.
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124
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125 :type attribute_names: string or list of strings
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126 :param attribute_names: An attribute name or list of attribute names. This
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127 parameter is optional. If not supplied, all attributes
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128 will be retrieved for the item.
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129
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130 :rtype: :class:`boto.sdb.item.Item`
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131 :return: An Item mapping type containing the requested attribute name/values
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132 """
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133 return self.connection.get_attributes(self, item_name, attribute_name,
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134 consistent_read, item)
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135
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136 def delete_attributes(self, item_name, attributes=None,
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137 expected_values=None):
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138 """
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139 Delete attributes from a given item.
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140
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141 :type item_name: string
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142 :param item_name: The name of the item whose attributes are being deleted.
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143
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144 :type attributes: dict, list or :class:`boto.sdb.item.Item`
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145 :param attributes: Either a list containing attribute names which will cause
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146 all values associated with that attribute name to be deleted or
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147 a dict or Item containing the attribute names and keys and list
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148 of values to delete as the value. If no value is supplied,
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149 all attribute name/values for the item will be deleted.
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150
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151 :type expected_value: list
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152 :param expected_value: If supplied, this is a list or tuple consisting
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153 of a single attribute name and expected value. The list can be of
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154 the form:
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155
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156 * ['name', 'value']
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157
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158 In which case the call will first verify that the attribute "name"
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159 of this item has a value of "value". If it does, the delete
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160 will proceed, otherwise a ConditionalCheckFailed error will be
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161 returned. The list can also be of the form:
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162
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163 * ['name', True|False]
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164
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165 which will simply check for the existence (True) or
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166 non-existence (False) of the attribute.
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167
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168 :rtype: bool
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169 :return: True if successful
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170 """
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171 return self.connection.delete_attributes(self, item_name, attributes,
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172 expected_values)
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173
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174 def batch_delete_attributes(self, items):
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175 """
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176 Delete multiple items in this domain.
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177
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178 :type items: dict or dict-like object
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179 :param items: A dictionary-like object. The keys of the dictionary are
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180 the item names and the values are either:
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181
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182 * dictionaries of attribute names/values, exactly the
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183 same as the attribute_names parameter of the scalar
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184 put_attributes call. The attribute name/value pairs
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185 will only be deleted if they match the name/value
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186 pairs passed in.
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187 * None which means that all attributes associated
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188 with the item should be deleted.
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189
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190 :rtype: bool
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191 :return: True if successful
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192 """
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193 return self.connection.batch_delete_attributes(self, items)
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194
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195 def select(self, query='', next_token=None, consistent_read=False, max_items=None):
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196 """
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197 Returns a set of Attributes for item names within domain_name that match the query.
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198 The query must be expressed in using the SELECT style syntax rather than the
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199 original SimpleDB query language.
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200
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201 :type query: string
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202 :param query: The SimpleDB query to be performed.
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203
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204 :rtype: iter
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205 :return: An iterator containing the results. This is actually a generator
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206 function that will iterate across all search results, not just the
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207 first page.
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208 """
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209 return SelectResultSet(self, query, max_items=max_items, next_token=next_token,
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210 consistent_read=consistent_read)
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211
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212 def get_item(self, item_name, consistent_read=False):
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213 """
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214 Retrieves an item from the domain, along with all of its attributes.
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215
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216 :param string item_name: The name of the item to retrieve.
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217 :rtype: :class:`boto.sdb.item.Item` or ``None``
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218 :keyword bool consistent_read: When set to true, ensures that the most
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219 recent data is returned.
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220 :return: The requested item, or ``None`` if there was no match found
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221 """
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222 item = self.get_attributes(item_name, consistent_read=consistent_read)
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223 if item:
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224 item.domain = self
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225 return item
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226 else:
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227 return None
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228
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229 def new_item(self, item_name):
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230 return self.connection.item_cls(self, item_name)
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231
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232 def delete_item(self, item):
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233 self.delete_attributes(item.name)
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234
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235 def to_xml(self, f=None):
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236 """Get this domain as an XML DOM Document
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237 :param f: Optional File to dump directly to
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238 :type f: File or Stream
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239
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240 :return: File object where the XML has been dumped to
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241 :rtype: file
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242 """
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243 if not f:
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244 from tempfile import TemporaryFile
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245 f = TemporaryFile()
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246 print('<?xml version="1.0" encoding="UTF-8"?>', file=f)
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247 print('<Domain id="%s">' % self.name, file=f)
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248 for item in self:
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249 print('\t<Item id="%s">' % item.name, file=f)
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250 for k in item:
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251 print('\t\t<attribute id="%s">' % k, file=f)
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252 values = item[k]
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253 if not isinstance(values, list):
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254 values = [values]
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255 for value in values:
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256 print('\t\t\t<value><![CDATA[', end=' ', file=f)
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257 if isinstance(value, six.text_type):
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258 value = value.encode('utf-8', 'replace')
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259 else:
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260 value = six.text_type(value, errors='replace').encode('utf-8', 'replace')
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261 f.write(value)
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262 print(']]></value>', file=f)
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263 print('\t\t</attribute>', file=f)
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264 print('\t</Item>', file=f)
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265 print('</Domain>', file=f)
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266 f.flush()
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267 f.seek(0)
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268 return f
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269
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270
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271 def from_xml(self, doc):
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272 """Load this domain based on an XML document"""
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273 import xml.sax
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274 handler = DomainDumpParser(self)
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275 xml.sax.parse(doc, handler)
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276 return handler
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277
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278 def delete(self):
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279 """
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280 Delete this domain, and all items under it
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281 """
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282 return self.connection.delete_domain(self)
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283
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284
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285 class DomainMetaData(object):
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286
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287 def __init__(self, domain=None):
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288 self.domain = domain
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289 self.item_count = None
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290 self.item_names_size = None
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291 self.attr_name_count = None
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292 self.attr_names_size = None
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293 self.attr_value_count = None
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294 self.attr_values_size = None
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295
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296 def startElement(self, name, attrs, connection):
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297 return None
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298
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299 def endElement(self, name, value, connection):
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300 if name == 'ItemCount':
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301 self.item_count = int(value)
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302 elif name == 'ItemNamesSizeBytes':
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303 self.item_names_size = int(value)
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304 elif name == 'AttributeNameCount':
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305 self.attr_name_count = int(value)
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306 elif name == 'AttributeNamesSizeBytes':
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307 self.attr_names_size = int(value)
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308 elif name == 'AttributeValueCount':
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309 self.attr_value_count = int(value)
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310 elif name == 'AttributeValuesSizeBytes':
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311 self.attr_values_size = int(value)
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312 elif name == 'Timestamp':
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313 self.timestamp = value
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314 else:
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315 setattr(self, name, value)
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316
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317 import sys
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318 from xml.sax.handler import ContentHandler
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319 class DomainDumpParser(ContentHandler):
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320 """
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321 SAX parser for a domain that has been dumped
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322 """
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323
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324 def __init__(self, domain):
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325 self.uploader = UploaderThread(domain)
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326 self.item_id = None
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327 self.attrs = {}
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328 self.attribute = None
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329 self.value = ""
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330 self.domain = domain
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331
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332 def startElement(self, name, attrs):
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333 if name == "Item":
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334 self.item_id = attrs['id']
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335 self.attrs = {}
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336 elif name == "attribute":
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337 self.attribute = attrs['id']
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338 elif name == "value":
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339 self.value = ""
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340
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341 def characters(self, ch):
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342 self.value += ch
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343
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344 def endElement(self, name):
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345 if name == "value":
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346 if self.value and self.attribute:
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347 value = self.value.strip()
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348 attr_name = self.attribute.strip()
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349 if attr_name in self.attrs:
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350 self.attrs[attr_name].append(value)
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351 else:
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352 self.attrs[attr_name] = [value]
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353 elif name == "Item":
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354 self.uploader.items[self.item_id] = self.attrs
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355 # Every 20 items we spawn off the uploader
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356 if len(self.uploader.items) >= 20:
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357 self.uploader.start()
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358 self.uploader = UploaderThread(self.domain)
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359 elif name == "Domain":
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360 # If we're done, spawn off our last Uploader Thread
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361 self.uploader.start()
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362
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363 from threading import Thread
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364 class UploaderThread(Thread):
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365 """Uploader Thread"""
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366
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367 def __init__(self, domain):
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368 self.db = domain
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369 self.items = {}
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370 super(UploaderThread, self).__init__()
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371
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372 def run(self):
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373 try:
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374 self.db.batch_put_attributes(self.items)
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375 except:
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376 print("Exception using batch put, trying regular put instead")
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377 for item_name in self.items:
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378 self.db.put_attributes(item_name, self.items[item_name])
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379 print(".", end=' ')
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380 sys.stdout.flush()