Mercurial > repos > shellac > guppy_basecaller
annotate env/lib/python3.7/site-packages/boto/sdb/connection.py @ 4:79f47841a781 draft
"planemo upload commit 2a0fe2cc28b09e101d37293e53e82f61762262ec"
author | shellac |
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date | Thu, 14 May 2020 16:47:39 -0400 |
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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 import xml.sax |
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22 import threading |
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23 import boto |
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24 from boto import handler |
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25 from boto.connection import AWSQueryConnection |
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26 from boto.sdb.domain import Domain, DomainMetaData |
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27 from boto.sdb.item import Item |
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28 from boto.sdb.regioninfo import SDBRegionInfo |
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29 from boto.exception import SDBResponseError |
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30 |
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31 class ItemThread(threading.Thread): |
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32 """ |
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33 A threaded :class:`Item <boto.sdb.item.Item>` retriever utility class. |
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34 Retrieved :class:`Item <boto.sdb.item.Item>` objects are stored in the |
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35 ``items`` instance variable after :py:meth:`run() <run>` is called. |
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36 |
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37 .. tip:: The item retrieval will not start until |
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38 the :func:`run() <boto.sdb.connection.ItemThread.run>` method is called. |
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39 """ |
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40 def __init__(self, name, domain_name, item_names): |
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41 """ |
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42 :param str name: A thread name. Used for identification. |
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43 :param str domain_name: The name of a SimpleDB |
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44 :class:`Domain <boto.sdb.domain.Domain>` |
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45 :type item_names: string or list of strings |
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46 :param item_names: The name(s) of the items to retrieve from the specified |
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47 :class:`Domain <boto.sdb.domain.Domain>`. |
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48 :ivar list items: A list of items retrieved. Starts as empty list. |
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49 """ |
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50 super(ItemThread, self).__init__(name=name) |
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51 #print 'starting %s with %d items' % (name, len(item_names)) |
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52 self.domain_name = domain_name |
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53 self.conn = SDBConnection() |
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54 self.item_names = item_names |
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55 self.items = [] |
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56 |
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57 def run(self): |
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58 """ |
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59 Start the threaded retrieval of items. Populates the |
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60 ``items`` list with :class:`Item <boto.sdb.item.Item>` objects. |
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61 """ |
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62 for item_name in self.item_names: |
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63 item = self.conn.get_attributes(self.domain_name, item_name) |
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64 self.items.append(item) |
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65 |
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66 #boto.set_stream_logger('sdb') |
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67 |
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68 class SDBConnection(AWSQueryConnection): |
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69 """ |
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70 This class serves as a gateway to your SimpleDB region (defaults to |
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71 us-east-1). Methods within allow access to SimpleDB |
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72 :class:`Domain <boto.sdb.domain.Domain>` objects and their associated |
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73 :class:`Item <boto.sdb.item.Item>` objects. |
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74 |
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75 .. tip:: |
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76 While you may instantiate this class directly, it may be easier to |
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77 go through :py:func:`boto.connect_sdb`. |
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78 """ |
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79 DefaultRegionName = 'us-east-1' |
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80 DefaultRegionEndpoint = 'sdb.us-east-1.amazonaws.com' |
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81 APIVersion = '2009-04-15' |
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82 ResponseError = SDBResponseError |
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83 |
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84 def __init__(self, aws_access_key_id=None, aws_secret_access_key=None, |
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85 is_secure=True, port=None, proxy=None, proxy_port=None, |
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86 proxy_user=None, proxy_pass=None, debug=0, |
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87 https_connection_factory=None, region=None, path='/', |
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88 converter=None, security_token=None, validate_certs=True, |
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89 profile_name=None): |
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90 """ |
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91 For any keywords that aren't documented, refer to the parent class, |
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92 :py:class:`boto.connection.AWSAuthConnection`. You can avoid having |
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93 to worry about these keyword arguments by instantiating these objects |
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94 via :py:func:`boto.connect_sdb`. |
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95 |
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96 :type region: :class:`boto.sdb.regioninfo.SDBRegionInfo` |
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97 :keyword region: Explicitly specify a region. Defaults to ``us-east-1`` |
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98 if not specified. You may also specify the region in your ``boto.cfg``: |
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99 |
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100 .. code-block:: cfg |
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101 |
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102 [SDB] |
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103 region = eu-west-1 |
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104 |
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105 """ |
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106 if not region: |
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107 region_name = boto.config.get('SDB', 'region', self.DefaultRegionName) |
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108 for reg in boto.sdb.regions(): |
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109 if reg.name == region_name: |
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110 region = reg |
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111 break |
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112 |
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113 self.region = region |
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114 super(SDBConnection, self).__init__(aws_access_key_id, |
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115 aws_secret_access_key, |
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116 is_secure, port, proxy, |
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117 proxy_port, proxy_user, proxy_pass, |
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118 self.region.endpoint, debug, |
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119 https_connection_factory, path, |
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120 security_token=security_token, |
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121 validate_certs=validate_certs, |
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122 profile_name=profile_name) |
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123 self.box_usage = 0.0 |
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124 self.converter = converter |
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125 self.item_cls = Item |
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126 |
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127 def _required_auth_capability(self): |
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128 return ['sdb'] |
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129 |
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130 def set_item_cls(self, cls): |
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131 """ |
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132 While the default item class is :py:class:`boto.sdb.item.Item`, this |
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133 default may be overridden. Use this method to change a connection's |
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134 item class. |
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135 |
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136 :param object cls: The new class to set as this connection's item |
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137 class. See the default item class for inspiration as to what your |
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138 replacement should/could look like. |
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139 """ |
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140 self.item_cls = cls |
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141 |
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142 def _build_name_value_list(self, params, attributes, replace=False, |
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143 label='Attribute'): |
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144 keys = sorted(attributes.keys()) |
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145 i = 1 |
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146 for key in keys: |
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147 value = attributes[key] |
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148 if isinstance(value, list): |
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149 for v in value: |
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150 params['%s.%d.Name' % (label, i)] = key |
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151 if self.converter: |
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152 v = self.converter.encode(v) |
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153 params['%s.%d.Value' % (label, i)] = v |
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154 if replace: |
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155 params['%s.%d.Replace' % (label, i)] = 'true' |
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156 i += 1 |
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157 else: |
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158 params['%s.%d.Name' % (label, i)] = key |
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159 if self.converter: |
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160 value = self.converter.encode(value) |
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161 params['%s.%d.Value' % (label, i)] = value |
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162 if replace: |
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163 params['%s.%d.Replace' % (label, i)] = 'true' |
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164 i += 1 |
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165 |
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166 def _build_expected_value(self, params, expected_value): |
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167 params['Expected.1.Name'] = expected_value[0] |
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168 if expected_value[1] is True: |
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169 params['Expected.1.Exists'] = 'true' |
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170 elif expected_value[1] is False: |
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171 params['Expected.1.Exists'] = 'false' |
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172 else: |
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173 params['Expected.1.Value'] = expected_value[1] |
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174 |
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175 def _build_batch_list(self, params, items, replace=False): |
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176 item_names = items.keys() |
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177 i = 0 |
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178 for item_name in item_names: |
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179 params['Item.%d.ItemName' % i] = item_name |
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180 j = 0 |
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181 item = items[item_name] |
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182 if item is not None: |
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183 attr_names = item.keys() |
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184 for attr_name in attr_names: |
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185 value = item[attr_name] |
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186 if isinstance(value, list): |
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187 for v in value: |
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188 if self.converter: |
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189 v = self.converter.encode(v) |
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190 params['Item.%d.Attribute.%d.Name' % (i, j)] = attr_name |
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191 params['Item.%d.Attribute.%d.Value' % (i, j)] = v |
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192 if replace: |
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193 params['Item.%d.Attribute.%d.Replace' % (i, j)] = 'true' |
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194 j += 1 |
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195 else: |
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196 params['Item.%d.Attribute.%d.Name' % (i, j)] = attr_name |
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197 if self.converter: |
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198 value = self.converter.encode(value) |
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199 params['Item.%d.Attribute.%d.Value' % (i, j)] = value |
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200 if replace: |
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201 params['Item.%d.Attribute.%d.Replace' % (i, j)] = 'true' |
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202 j += 1 |
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203 i += 1 |
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204 |
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205 def _build_name_list(self, params, attribute_names): |
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206 i = 1 |
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207 attribute_names.sort() |
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208 for name in attribute_names: |
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209 params['Attribute.%d.Name' % i] = name |
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210 i += 1 |
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211 |
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212 def get_usage(self): |
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213 """ |
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214 Returns the BoxUsage (in USD) accumulated on this specific SDBConnection |
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215 instance. |
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216 |
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217 .. tip:: This can be out of date, and should only be treated as a |
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218 rough estimate. Also note that this estimate only applies to the |
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219 requests made on this specific connection instance. It is by |
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220 no means an account-wide estimate. |
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221 |
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222 :rtype: float |
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223 :return: The accumulated BoxUsage of all requests made on the connection. |
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224 """ |
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225 return self.box_usage |
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226 |
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227 def print_usage(self): |
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228 """ |
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229 Print the BoxUsage and approximate costs of all requests made on |
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230 this specific SDBConnection instance. |
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231 |
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232 .. tip:: This can be out of date, and should only be treated as a |
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233 rough estimate. Also note that this estimate only applies to the |
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234 requests made on this specific connection instance. It is by |
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235 no means an account-wide estimate. |
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236 """ |
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237 print('Total Usage: %f compute seconds' % self.box_usage) |
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238 cost = self.box_usage * 0.14 |
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239 print('Approximate Cost: $%f' % cost) |
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240 |
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241 def get_domain(self, domain_name, validate=True): |
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242 """ |
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243 Retrieves a :py:class:`boto.sdb.domain.Domain` object whose name |
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244 matches ``domain_name``. |
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245 |
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246 :param str domain_name: The name of the domain to retrieve |
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247 :keyword bool validate: When ``True``, check to see if the domain |
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248 actually exists. If ``False``, blindly return a |
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249 :py:class:`Domain <boto.sdb.domain.Domain>` object with the |
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250 specified name set. |
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251 |
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252 :raises: |
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253 :py:class:`boto.exception.SDBResponseError` if ``validate`` is |
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254 ``True`` and no match could be found. |
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255 |
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256 :rtype: :py:class:`boto.sdb.domain.Domain` |
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257 :return: The requested domain |
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258 """ |
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259 domain = Domain(self, domain_name) |
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260 if validate: |
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261 self.select(domain, """select * from `%s` limit 1""" % domain_name) |
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262 return domain |
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263 |
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264 def lookup(self, domain_name, validate=True): |
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265 """ |
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266 Lookup an existing SimpleDB domain. This differs from |
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267 :py:meth:`get_domain` in that ``None`` is returned if ``validate`` is |
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268 ``True`` and no match was found (instead of raising an exception). |
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269 |
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270 :param str domain_name: The name of the domain to retrieve |
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271 |
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272 :param bool validate: If ``True``, a ``None`` value will be returned |
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273 if the specified domain can't be found. If ``False``, a |
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274 :py:class:`Domain <boto.sdb.domain.Domain>` object will be dumbly |
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275 returned, regardless of whether it actually exists. |
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276 |
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277 :rtype: :class:`boto.sdb.domain.Domain` object or ``None`` |
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278 :return: The Domain object or ``None`` if the domain does not exist. |
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279 """ |
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280 try: |
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281 domain = self.get_domain(domain_name, validate) |
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282 except: |
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283 domain = None |
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284 return domain |
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285 |
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286 def get_all_domains(self, max_domains=None, next_token=None): |
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287 """ |
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288 Returns a :py:class:`boto.resultset.ResultSet` containing |
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289 all :py:class:`boto.sdb.domain.Domain` objects associated with |
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290 this connection's Access Key ID. |
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291 |
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292 :keyword int max_domains: Limit the returned |
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293 :py:class:`ResultSet <boto.resultset.ResultSet>` to the specified |
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294 number of members. |
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295 :keyword str next_token: A token string that was returned in an |
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296 earlier call to this method as the ``next_token`` attribute |
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297 on the returned :py:class:`ResultSet <boto.resultset.ResultSet>` |
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298 object. This attribute is set if there are more than Domains than |
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299 the value specified in the ``max_domains`` keyword. Pass the |
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300 ``next_token`` value from you earlier query in this keyword to |
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301 get the next 'page' of domains. |
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302 """ |
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303 params = {} |
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304 if max_domains: |
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305 params['MaxNumberOfDomains'] = max_domains |
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306 if next_token: |
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307 params['NextToken'] = next_token |
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308 return self.get_list('ListDomains', params, [('DomainName', Domain)]) |
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309 |
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310 def create_domain(self, domain_name): |
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311 """ |
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312 Create a SimpleDB domain. |
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313 |
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314 :type domain_name: string |
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315 :param domain_name: The name of the new domain |
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316 |
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317 :rtype: :class:`boto.sdb.domain.Domain` object |
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318 :return: The newly created domain |
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319 """ |
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320 params = {'DomainName': domain_name} |
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321 d = self.get_object('CreateDomain', params, Domain) |
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322 d.name = domain_name |
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323 return d |
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324 |
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325 def get_domain_and_name(self, domain_or_name): |
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326 """ |
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327 Given a ``str`` or :class:`boto.sdb.domain.Domain`, return a |
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328 ``tuple`` with the following members (in order): |
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329 |
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330 * In instance of :class:`boto.sdb.domain.Domain` for the requested |
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331 domain |
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332 * The domain's name as a ``str`` |
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333 |
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334 :type domain_or_name: ``str`` or :class:`boto.sdb.domain.Domain` |
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335 :param domain_or_name: The domain or domain name to get the domain |
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336 and name for. |
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337 |
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338 :raises: :class:`boto.exception.SDBResponseError` when an invalid |
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339 domain name is specified. |
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340 |
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341 :rtype: tuple |
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342 :return: A ``tuple`` with contents outlined as per above. |
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343 """ |
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344 if (isinstance(domain_or_name, Domain)): |
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345 return (domain_or_name, domain_or_name.name) |
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346 else: |
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347 return (self.get_domain(domain_or_name), domain_or_name) |
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348 |
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349 def delete_domain(self, domain_or_name): |
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350 """ |
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351 Delete a SimpleDB domain. |
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352 |
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353 .. caution:: This will delete the domain and all items within the domain. |
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354 |
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355 :type domain_or_name: string or :class:`boto.sdb.domain.Domain` object. |
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356 :param domain_or_name: Either the name of a domain or a Domain object |
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357 |
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358 :rtype: bool |
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359 :return: True if successful |
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360 |
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361 """ |
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362 domain, domain_name = self.get_domain_and_name(domain_or_name) |
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363 params = {'DomainName': domain_name} |
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364 return self.get_status('DeleteDomain', params) |
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365 |
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366 def domain_metadata(self, domain_or_name): |
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367 """ |
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368 Get the Metadata for a SimpleDB domain. |
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369 |
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370 :type domain_or_name: string or :class:`boto.sdb.domain.Domain` object. |
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371 :param domain_or_name: Either the name of a domain or a Domain object |
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372 |
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373 :rtype: :class:`boto.sdb.domain.DomainMetaData` object |
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374 :return: The newly created domain metadata object |
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375 """ |
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376 domain, domain_name = self.get_domain_and_name(domain_or_name) |
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377 params = {'DomainName': domain_name} |
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378 d = self.get_object('DomainMetadata', params, DomainMetaData) |
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379 d.domain = domain |
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380 return d |
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381 |
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382 def put_attributes(self, domain_or_name, item_name, attributes, |
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383 replace=True, expected_value=None): |
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384 """ |
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385 Store attributes for a given item in a domain. |
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386 |
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387 :type domain_or_name: string or :class:`boto.sdb.domain.Domain` object. |
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388 :param domain_or_name: Either the name of a domain or a Domain object |
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389 |
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390 :type item_name: string |
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391 :param item_name: The name of the item whose attributes are being |
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392 stored. |
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393 |
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394 :type attribute_names: dict or dict-like object |
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395 :param attribute_names: The name/value pairs to store as attributes |
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396 |
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397 :type expected_value: list |
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398 :param expected_value: If supplied, this is a list or tuple consisting |
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399 of a single attribute name and expected value. The list can be |
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400 of the form: |
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401 |
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402 * ['name', 'value'] |
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403 |
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404 In which case the call will first verify that the attribute "name" |
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405 of this item has a value of "value". If it does, the delete |
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406 will proceed, otherwise a ConditionalCheckFailed error will be |
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407 returned. The list can also be of the form: |
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408 |
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409 * ['name', True|False] |
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410 |
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411 which will simply check for the existence (True) or |
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412 non-existence (False) of the attribute. |
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413 |
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414 :type replace: bool |
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415 :param replace: Whether the attribute values passed in will replace |
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416 existing values or will be added as addition values. |
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417 Defaults to True. |
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418 |
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419 :rtype: bool |
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420 :return: True if successful |
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421 """ |
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422 domain, domain_name = self.get_domain_and_name(domain_or_name) |
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423 params = {'DomainName': domain_name, |
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424 'ItemName': item_name} |
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425 self._build_name_value_list(params, attributes, replace) |
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426 if expected_value: |
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427 self._build_expected_value(params, expected_value) |
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428 return self.get_status('PutAttributes', params) |
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429 |
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430 def batch_put_attributes(self, domain_or_name, items, replace=True): |
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431 """ |
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432 Store attributes for multiple items in a domain. |
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433 |
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434 :type domain_or_name: string or :class:`boto.sdb.domain.Domain` object. |
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435 :param domain_or_name: Either the name of a domain or a Domain object |
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436 |
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437 :type items: dict or dict-like object |
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438 :param items: A dictionary-like object. The keys of the dictionary are |
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439 the item names and the values are themselves dictionaries |
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440 of attribute names/values, exactly the same as the |
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441 attribute_names parameter of the scalar put_attributes |
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442 call. |
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443 |
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444 :type replace: bool |
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445 :param replace: Whether the attribute values passed in will replace |
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446 existing values or will be added as addition values. |
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447 Defaults to True. |
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448 |
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449 :rtype: bool |
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450 :return: True if successful |
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451 """ |
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452 domain, domain_name = self.get_domain_and_name(domain_or_name) |
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453 params = {'DomainName': domain_name} |
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454 self._build_batch_list(params, items, replace) |
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455 return self.get_status('BatchPutAttributes', params, verb='POST') |
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456 |
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457 def get_attributes(self, domain_or_name, item_name, attribute_names=None, |
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458 consistent_read=False, item=None): |
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459 """ |
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460 Retrieve attributes for a given item in a domain. |
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461 |
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462 :type domain_or_name: string or :class:`boto.sdb.domain.Domain` object. |
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463 :param domain_or_name: Either the name of a domain or a Domain object |
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464 |
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465 :type item_name: string |
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466 :param item_name: The name of the item whose attributes are |
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467 being retrieved. |
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468 |
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469 :type attribute_names: string or list of strings |
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470 :param attribute_names: An attribute name or list of attribute names. |
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471 This parameter is optional. If not supplied, all attributes will |
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472 be retrieved for the item. |
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473 |
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474 :type consistent_read: bool |
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475 :param consistent_read: When set to true, ensures that the most recent |
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476 data is returned. |
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477 |
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478 :type item: :class:`boto.sdb.item.Item` |
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479 :keyword item: Instead of instantiating a new Item object, you may |
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480 specify one to update. |
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481 |
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482 :rtype: :class:`boto.sdb.item.Item` |
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483 :return: An Item with the requested attribute name/values set on it |
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484 """ |
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485 domain, domain_name = self.get_domain_and_name(domain_or_name) |
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486 params = {'DomainName': domain_name, |
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487 'ItemName': item_name} |
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488 if consistent_read: |
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489 params['ConsistentRead'] = 'true' |
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490 if attribute_names: |
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491 if not isinstance(attribute_names, list): |
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492 attribute_names = [attribute_names] |
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493 self.build_list_params(params, attribute_names, 'AttributeName') |
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494 response = self.make_request('GetAttributes', params) |
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495 body = response.read() |
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496 if response.status == 200: |
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497 if item is None: |
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498 item = self.item_cls(domain, item_name) |
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499 h = handler.XmlHandler(item, self) |
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500 xml.sax.parseString(body, h) |
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501 return item |
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502 else: |
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503 raise SDBResponseError(response.status, response.reason, body) |
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504 |
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505 def delete_attributes(self, domain_or_name, item_name, attr_names=None, |
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506 expected_value=None): |
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507 """ |
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508 Delete attributes from a given item in a domain. |
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509 |
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510 :type domain_or_name: string or :class:`boto.sdb.domain.Domain` object. |
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511 :param domain_or_name: Either the name of a domain or a Domain object |
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512 |
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513 :type item_name: string |
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514 :param item_name: The name of the item whose attributes are being |
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515 deleted. |
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516 |
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517 :type attributes: dict, list or :class:`boto.sdb.item.Item` |
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518 :param attributes: Either a list containing attribute names which |
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519 will cause all values associated with that attribute |
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520 name to be deleted or a dict or Item containing the |
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521 attribute names and keys and list of values to |
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522 delete as the value. If no value is supplied, |
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523 all attribute name/values for the item will be |
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524 deleted. |
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525 |
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526 :type expected_value: list |
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527 :param expected_value: If supplied, this is a list or tuple consisting |
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528 of a single attribute name and expected value. The list can be |
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529 of the form: |
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530 |
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531 * ['name', 'value'] |
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532 |
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533 In which case the call will first verify that the attribute "name" |
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534 of this item has a value of "value". If it does, the delete |
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535 will proceed, otherwise a ConditionalCheckFailed error will be |
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536 returned. The list can also be of the form: |
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537 |
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538 * ['name', True|False] |
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539 |
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540 which will simply check for the existence (True) or |
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541 non-existence (False) of the attribute. |
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542 |
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543 :rtype: bool |
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544 :return: True if successful |
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545 """ |
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546 domain, domain_name = self.get_domain_and_name(domain_or_name) |
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547 params = {'DomainName': domain_name, |
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548 'ItemName': item_name} |
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549 if attr_names: |
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550 if isinstance(attr_names, list): |
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551 self._build_name_list(params, attr_names) |
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552 elif isinstance(attr_names, dict) or isinstance(attr_names, self.item_cls): |
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553 self._build_name_value_list(params, attr_names) |
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554 if expected_value: |
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555 self._build_expected_value(params, expected_value) |
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556 return self.get_status('DeleteAttributes', params) |
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557 |
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558 def batch_delete_attributes(self, domain_or_name, items): |
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559 """ |
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560 Delete multiple items in a domain. |
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561 |
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562 :type domain_or_name: string or :class:`boto.sdb.domain.Domain` object. |
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563 :param domain_or_name: Either the name of a domain or a Domain object |
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564 |
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565 :type items: dict or dict-like object |
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566 :param items: A dictionary-like object. The keys of the dictionary are |
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567 the item names and the values are either: |
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568 |
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569 * dictionaries of attribute names/values, exactly the |
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570 same as the attribute_names parameter of the scalar |
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571 put_attributes call. The attribute name/value pairs |
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572 will only be deleted if they match the name/value |
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573 pairs passed in. |
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574 * None which means that all attributes associated |
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575 with the item should be deleted. |
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576 |
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577 :return: True if successful |
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578 """ |
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579 domain, domain_name = self.get_domain_and_name(domain_or_name) |
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580 params = {'DomainName': domain_name} |
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581 self._build_batch_list(params, items, False) |
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582 return self.get_status('BatchDeleteAttributes', params, verb='POST') |
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583 |
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584 def select(self, domain_or_name, query='', next_token=None, |
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585 consistent_read=False): |
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586 """ |
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587 Returns a set of Attributes for item names within domain_name that |
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588 match the query. The query must be expressed in using the SELECT |
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589 style syntax rather than the original SimpleDB query language. |
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590 Even though the select request does not require a domain object, |
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591 a domain object must be passed into this method so the Item objects |
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592 returned can point to the appropriate domain. |
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593 |
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594 :type domain_or_name: string or :class:`boto.sdb.domain.Domain` object |
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595 :param domain_or_name: Either the name of a domain or a Domain object |
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596 |
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597 :type query: string |
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598 :param query: The SimpleDB query to be performed. |
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599 |
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600 :type consistent_read: bool |
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601 :param consistent_read: When set to true, ensures that the most recent |
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602 data is returned. |
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603 |
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604 :rtype: ResultSet |
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605 :return: An iterator containing the results. |
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606 """ |
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607 domain, domain_name = self.get_domain_and_name(domain_or_name) |
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608 params = {'SelectExpression': query} |
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609 if consistent_read: |
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610 params['ConsistentRead'] = 'true' |
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611 if next_token: |
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612 params['NextToken'] = next_token |
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613 try: |
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614 return self.get_list('Select', params, [('Item', self.item_cls)], |
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615 parent=domain) |
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616 except SDBResponseError as e: |
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617 e.body = "Query: %s\n%s" % (query, e.body) |
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618 raise e |