Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/boto/endpoints.py @ 0:26e78fe6e8c4 draft

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"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
author shellac
date Sat, 02 May 2020 07:14:21 -0400
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1 # Copyright 2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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2 #
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3 # Licensed under the Apache License, Version 2.0 (the "License"). You
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4 # may not use this file except in compliance with the License. A copy of
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5 # the License is located at
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6 #
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7 # http://aws.amazon.com/apache2.0/
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8 #
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9 # or in the "license" file accompanying this file. This file is
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10 # distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
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11 # ANY KIND, either express or implied. See the License for the specific
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12 # language governing permissions and limitations under the License.
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13 import boto.vendored.regions.regions as _regions
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14
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15
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16 class _CompatEndpointResolver(_regions.EndpointResolver):
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17 """Endpoint resolver which handles boto2 compatibility concerns.
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18
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19 This is NOT intended for external use whatsoever.
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20 """
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21
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22 _DEFAULT_SERVICE_RENAMES = {
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23 # The botocore resolver is based on endpoint prefix.
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24 # These don't always sync up to the name that boto2 uses.
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25 # A mapping can be provided that handles the mapping between
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26 # "service names" and endpoint prefixes.
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27 'awslambda': 'lambda',
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28 'cloudwatch': 'monitoring',
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29 'ses': 'email',
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30 'ec2containerservice': 'ecs',
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31 'configservice': 'config',
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32 }
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33
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34 def __init__(self, endpoint_data, service_rename_map=None):
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35 """
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36 :type endpoint_data: dict
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37 :param endpoint_data: Regions and endpoints data in the same format
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38 as is used by botocore / boto3.
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39
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40 :type service_rename_map: dict
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41 :param service_rename_map: A mapping of boto2 service name to
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42 endpoint prefix.
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43 """
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44 super(_CompatEndpointResolver, self).__init__(endpoint_data)
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45 if service_rename_map is None:
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46 service_rename_map = self._DEFAULT_SERVICE_RENAMES
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47 # Mapping of boto2 service name to endpoint prefix
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48 self._endpoint_prefix_map = service_rename_map
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49 # Mapping of endpoint prefix to boto2 service name
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50 self._service_name_map = dict(
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51 (v, k) for k, v in service_rename_map.items())
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52
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53 def get_available_endpoints(self, service_name, partition_name='aws',
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54 allow_non_regional=False):
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55 endpoint_prefix = self._endpoint_prefix(service_name)
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56 return super(_CompatEndpointResolver, self).get_available_endpoints(
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57 endpoint_prefix, partition_name, allow_non_regional)
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58
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59 def get_all_available_regions(self, service_name):
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60 """Retrieve every region across partitions for a service."""
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61 regions = set()
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62 endpoint_prefix = self._endpoint_prefix(service_name)
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63
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64 # Get every region for every partition in the new endpoint format
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65 for partition_name in self.get_available_partitions():
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66 if self._is_global_service(service_name, partition_name):
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67 # Global services are available in every region in the
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68 # partition in which they are considered global.
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69 partition = self._get_partition_data(partition_name)
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70 regions.update(partition['regions'].keys())
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71 continue
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72 else:
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73 regions.update(
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74 self.get_available_endpoints(
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75 endpoint_prefix, partition_name)
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76 )
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77
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78 return list(regions)
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79
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80 def construct_endpoint(self, service_name, region_name=None):
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81 endpoint_prefix = self._endpoint_prefix(service_name)
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82 return super(_CompatEndpointResolver, self).construct_endpoint(
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83 endpoint_prefix, region_name)
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84
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85 def get_available_services(self):
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86 """Get a list of all the available services in the endpoints file(s)"""
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87 services = set()
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88
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89 for partition in self._endpoint_data['partitions']:
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90 services.update(partition['services'].keys())
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91
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92 return [self._service_name(s) for s in services]
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93
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94 def _is_global_service(self, service_name, partition_name='aws'):
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95 """Determines whether a service uses a global endpoint.
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96
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97 In theory a service can be 'global' in one partition but regional in
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98 another. In practice, each service is all global or all regional.
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99 """
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100 endpoint_prefix = self._endpoint_prefix(service_name)
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101 partition = self._get_partition_data(partition_name)
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102 service = partition['services'].get(endpoint_prefix, {})
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103 return 'partitionEndpoint' in service
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104
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105 def _get_partition_data(self, partition_name):
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106 """Get partition information for a particular partition.
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107
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108 This should NOT be used to get service endpoint data because it only
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109 loads from the new endpoint format. It should only be used for
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110 partition metadata and partition specific service metadata.
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111
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112 :type partition_name: str
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113 :param partition_name: The name of the partition to search for.
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114
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115 :returns: Partition info from the new endpoints format.
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116 :rtype: dict or None
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117 """
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118 for partition in self._endpoint_data['partitions']:
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119 if partition['partition'] == partition_name:
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120 return partition
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121 raise ValueError(
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122 "Could not find partition data for: %s" % partition_name)
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123
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124 def _endpoint_prefix(self, service_name):
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125 """Given a boto2 service name, get the endpoint prefix."""
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126 return self._endpoint_prefix_map.get(service_name, service_name)
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127
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128 def _service_name(self, endpoint_prefix):
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129 """Given an endpoint prefix, get the boto2 service name."""
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130 return self._service_name_map.get(endpoint_prefix, endpoint_prefix)
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131
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132
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133 class BotoEndpointResolver(object):
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134 """Resolves endpoint hostnames for AWS services.
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135
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136 This is NOT intended for external use.
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137 """
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138
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139 def __init__(self, endpoint_data, service_rename_map=None):
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140 """
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141 :type endpoint_data: dict
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142 :param endpoint_data: Regions and endpoints data in the same format
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143 as is used by botocore / boto3.
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144
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145 :type service_rename_map: dict
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146 :param service_rename_map: A mapping of boto2 service name to
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147 endpoint prefix.
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148 """
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149 self._resolver = _CompatEndpointResolver(
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150 endpoint_data, service_rename_map)
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151
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152 def resolve_hostname(self, service_name, region_name):
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153 """Resolve the hostname for a service in a particular region.
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154
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155 :type service_name: str
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156 :param service_name: The service to look up.
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157
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158 :type region_name: str
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159 :param region_name: The region to find the endpoint for.
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160
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161 :return: The hostname for the given service in the given region.
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162 """
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163 endpoint = self._resolver.construct_endpoint(service_name, region_name)
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164 if endpoint is None:
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165 return None
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166 return endpoint.get('sslCommonName', endpoint['hostname'])
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167
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168 def get_all_available_regions(self, service_name):
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169 """Get all the regions a service is available in.
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170
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171 :type service_name: str
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172 :param service_name: The service to look up.
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173
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174 :rtype: list of str
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175 :return: A list of all the regions the given service is available in.
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176 """
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177 return self._resolver.get_all_available_regions(service_name)
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178
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179 def get_available_services(self):
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180 """Get all the services supported by the endpoint data.
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181
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182 :rtype: list of str
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183 :return: A list of all the services explicitly contained within the
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184 endpoint data provided during instantiation.
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185 """
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186 return self._resolver.get_available_services()
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187
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188
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189 class StaticEndpointBuilder(object):
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190 """Builds a static mapping of endpoints in the legacy format."""
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191
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192 def __init__(self, resolver):
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193 """
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194 :type resolver: BotoEndpointResolver
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195 :param resolver: An endpoint resolver.
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196 """
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197 self._resolver = resolver
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198
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199 def build_static_endpoints(self, service_names=None):
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200 """Build a set of static endpoints in the legacy boto2 format.
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201
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202 :param service_names: The names of the services to build. They must
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203 use the names that boto2 uses, not boto3, e.g "ec2containerservice"
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204 and not "ecs". If no service names are provided, all available
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205 services will be built.
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206
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207 :return: A dict consisting of::
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208 {"service": {"region": "full.host.name"}}
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209 """
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210 if service_names is None:
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211 service_names = self._resolver.get_available_services()
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212
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213 static_endpoints = {}
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214 for name in service_names:
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215 endpoints_for_service = self._build_endpoints_for_service(name)
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216 if endpoints_for_service:
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217 # It's possible that when we try to build endpoints for
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218 # services we get an empty hash. In that case we don't
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219 # bother adding it to the final list of static endpoints.
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220 static_endpoints[name] = endpoints_for_service
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221 self._handle_special_cases(static_endpoints)
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222 return static_endpoints
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223
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224 def _build_endpoints_for_service(self, service_name):
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225 # Given a service name, 'ec2', build a dict of
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226 # 'region' -> 'hostname'
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227 endpoints = {}
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228 regions = self._resolver.get_all_available_regions(service_name)
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229 for region_name in regions:
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230 endpoints[region_name] = self._resolver.resolve_hostname(
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231 service_name, region_name)
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232 return endpoints
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233
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234 def _handle_special_cases(self, static_endpoints):
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235 # cloudsearchdomain endpoints use the exact same set of endpoints as
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236 # cloudsearch.
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237 if 'cloudsearch' in static_endpoints:
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238 cloudsearch_endpoints = static_endpoints['cloudsearch']
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239 static_endpoints['cloudsearchdomain'] = cloudsearch_endpoints