Class: Aws::SimpleDB::Client

Inherits:

Seahorse::Client::Base

• Object
• Seahorse::Client::Base
• Aws::SimpleDB::Client

Defined in:

(unknown)

Overview

An API client for Amazon SimpleDB. To construct a client, you need to configure a :region and :credentials.

simpledb = Aws::SimpleDB::Client.new(
  region: region_name,
  credentials: credentials,
  # ...
)

See #initialize for a full list of supported configuration options.

Region

You can configure a default region in the following locations:

• ENV['AWS_REGION']
• Aws.config[:region]

Go here for a list of supported regions.

Credentials

Default credentials are loaded automatically from the following locations:

• ENV['AWS_ACCESS_KEY_ID'] and ENV['AWS_SECRET_ACCESS_KEY']
• Aws.config[:credentials]
• The shared credentials ini file at ~/.aws/credentials (more information)
• From an instance profile when running on EC2

You can also construct a credentials object from one of the following classes:

• Credentials
• Aws::SharedCredentials
• InstanceProfileCredentials
• AssumeRoleCredentials

Alternatively, you configure credentials with :access_key_id and :secret_access_key:

# load credentials from disk
creds = YAML.load(File.read('/path/to/secrets'))

Aws::SimpleDB::Client.new(
  access_key_id: creds['access_key_id'],
  secret_access_key: creds['secret_access_key']
)

Always load your credentials from outside your application. Avoid configuring credentials statically and never commit them to source control.

Instance Attribute Summary

Attributes inherited from Seahorse::Client::Base

#config, #handlers

Constructor

• #initialize(options = {}) ⇒ Aws::SimpleDB::Client constructor

  Constructs an API client.

API Operations

• #batch_delete_attributes(options = {}) ⇒ Struct

  Performs multiple DeleteAttributes operations in a single call, which reduces round trips and latencies.

• #batch_put_attributes(options = {}) ⇒ Struct

  The BatchPutAttributes operation creates or replaces attributes within one or more items.

• #create_domain(options = {}) ⇒ Struct

  The CreateDomain operation creates a new domain.

• #delete_attributes(options = {}) ⇒ Struct

  Deletes one or more attributes associated with an item.

• #delete_domain(options = {}) ⇒ Struct

  The DeleteDomain operation deletes a domain.

• #domain_metadata(options = {}) ⇒ Types::DomainMetadataResult

  Returns information about the domain, including when the domain was created, the number of items and attributes in the domain, and the size of the attribute names and values.

• #get_attributes(options = {}) ⇒ Types::GetAttributesResult

  Returns all of the attributes associated with the specified item.

• #list_domains(options = {}) ⇒ Types::ListDomainsResult

  The ListDomains operation lists all domains associated with the Access Key ID.

• #put_attributes(options = {}) ⇒ Struct

  The PutAttributes operation creates or replaces attributes in an item.

• #select(options = {}) ⇒ Types::SelectResult

  The Select operation returns a set of attributes for ItemNames that match the select expression.

Instance Method Summary

• #wait_until(waiter_name, params = {}) {|waiter| ... } ⇒ Boolean

  Waiters polls an API operation until a resource enters a desired state.

• #waiter_names ⇒ Array<Symbol>

  Returns the list of supported waiters.

Methods inherited from Seahorse::Client::Base

add_plugin, api, #build_request, clear_plugins, define, new, #operation, #operation_names, plugins, remove_plugin, set_api, set_plugins

Methods included from Seahorse::Client::HandlerBuilder

#handle, #handle_request, #handle_response

Constructor Details

#initialize(options = {}) ⇒ Aws::SimpleDB::Client

Constructs an API client.

Options Hash (options):

• :access_key_id (String) —

  Used to set credentials statically. See Plugins::RequestSigner for more details.

• :active_endpoint_cache (Boolean) —

  When set to true, a thread polling for endpoints will be running in the background every 60 secs (default). Defaults to false. See Plugins::EndpointDiscovery for more details.

• :convert_params (Boolean) — default: true —

  When true, an attempt is made to coerce request parameters into the required types. See Plugins::ParamConverter for more details.

• :credentials (required, Credentials) —

  Your AWS credentials. The following locations will be searched in order for credentials:

  • :access_key_id, :secret_access_key, and :session_token options
  • ENV['AWS_ACCESS_KEY_ID'], ENV['AWS_SECRET_ACCESS_KEY']
  • HOME/.aws/credentials shared credentials file
  • EC2 instance profile credentials See Plugins::RequestSigner for more details.
• :disable_host_prefix_injection (Boolean) —

  Set to true to disable SDK automatically adding host prefix to default service endpoint when available. See Plugins::EndpointPattern for more details.

• :endpoint (String) —

  A default endpoint is constructed from the :region. See Plugins::RegionalEndpoint for more details.

• :endpoint_cache_max_entries (Integer) —

  Used for the maximum size limit of the LRU cache storing endpoints data for endpoint discovery enabled operations. Defaults to 1000. See Plugins::EndpointDiscovery for more details.

• :endpoint_cache_max_threads (Integer) —

  Used for the maximum threads in use for polling endpoints to be cached, defaults to 10. See Plugins::EndpointDiscovery for more details.

• :endpoint_cache_poll_interval (Integer) —

  When :endpoint_discovery and :active_endpoint_cache is enabled, Use this option to config the time interval in seconds for making requests fetching endpoints information. Defaults to 60 sec. See Plugins::EndpointDiscovery for more details.

• :endpoint_discovery (Boolean) —

  When set to true, endpoint discovery will be enabled for operations when available. Defaults to false. See Plugins::EndpointDiscovery for more details.

• :http_continue_timeout (Float) — default: 1 —

  See Seahorse::Client::Plugins::NetHttp for more details.

• :http_idle_timeout (Integer) — default: 5 —

  See Seahorse::Client::Plugins::NetHttp for more details.

• :http_open_timeout (Integer) — default: 15 —

  See Seahorse::Client::Plugins::NetHttp for more details.

• :http_proxy (String) —

  See Seahorse::Client::Plugins::NetHttp for more details.

• :http_read_timeout (Integer) — default: 60 —

  See Seahorse::Client::Plugins::NetHttp for more details.

• :http_wire_trace (Boolean) — default: false —

  See Seahorse::Client::Plugins::NetHttp for more details.

• :log_level (Symbol) — default: :info —

  The log level to send messages to the logger at. See Plugins::Logging for more details.

• :log_formatter (Logging::LogFormatter) —

  The log formatter. Defaults to Seahorse::Client::Logging::Formatter.default. See Plugins::Logging for more details.

• :logger (Logger) — default: nil —

  The Logger instance to send log messages to. If this option is not set, logging will be disabled. See Plugins::Logging for more details.

• :profile (String) —

  Used when loading credentials from the shared credentials file at HOME/.aws/credentials. When not specified, 'default' is used. See Plugins::RequestSigner for more details.

• :raise_response_errors (Boolean) — default: true —

  When true, response errors are raised. See Seahorse::Client::Plugins::RaiseResponseErrors for more details.

• :region (required, String) —

  The AWS region to connect to. The region is used to construct the client endpoint. Defaults to ENV['AWS_REGION']. Also checks AMAZON_REGION and AWS_DEFAULT_REGION. See Plugins::RegionalEndpoint for more details.

• :retry_limit (Integer) — default: 3 —

  The maximum number of times to retry failed requests. Only ~ 500 level server errors and certain ~ 400 level client errors are retried. Generally, these are throttling errors, data checksum errors, networking errors, timeout errors and auth errors from expired credentials. See Plugins::RetryErrors for more details.

• :secret_access_key (String) —

  Used to set credentials statically. See Plugins::RequestSigner for more details.

• :session_token (String) —

  Used to set credentials statically. See Plugins::RequestSigner for more details.

• :ssl_ca_bundle (String) —

  See Seahorse::Client::Plugins::NetHttp for more details.

• :ssl_ca_directory (String) —

  See Seahorse::Client::Plugins::NetHttp for more details.

• :ssl_ca_store (String) —

  See Seahorse::Client::Plugins::NetHttp for more details.

• :ssl_verify_peer (Boolean) — default: true —

  See Seahorse::Client::Plugins::NetHttp for more details.

• :stub_responses (Boolean) — default: false —

  Causes the client to return stubbed responses. By default fake responses are generated and returned. You can specify the response data to return or errors to raise by calling ClientStubs#stub_responses. See ClientStubs for more information.

  Please note When response stubbing is enabled, no HTTP requests are made, and retries are disabled. See Plugins::StubResponses for more details.

• :validate_params (Boolean) — default: true —

  When true, request parameters are validated before sending the request. See Plugins::ParamValidator for more details.

Instance Method Details

#batch_delete_attributes(options = {}) ⇒ Struct

Performs multiple DeleteAttributes operations in a single call, which reduces round trips and latencies. This enables Amazon SimpleDB to optimize requests, which generally yields better throughput.

The following limitations are enforced for this operation:

• 1 MB request size
• 25 item limit per BatchDeleteAttributes operation

Examples:

Request syntax with placeholder values

resp = client.batch_delete_attributes({
  domain_name: "String", # required
  items: [ # required
    {
      name: "String", # required
      attributes: [
        {
          name: "String", # required
          alternate_name_encoding: "String",
          value: "String", # required
          alternate_value_encoding: "String",
        },
      ],
    },
  ],
})

Options Hash (options):

• :domain_name (required, String) —

  The name of the domain in which the attributes are being deleted.

• :items (required, Array<Types::DeletableItem>) —

  A list of items on which to perform the operation.

Returns:

• (Struct) —

  Returns an empty response.

#batch_put_attributes(options = {}) ⇒ Struct

The BatchPutAttributes operation creates or replaces attributes within one or more items. By using this operation, the client can perform multiple PutAttribute operation with a single call. This helps yield savings in round trips and latencies, enabling Amazon SimpleDB to optimize requests and generally produce better throughput.

The client may specify the item name with the Item.X.ItemName parameter. The client may specify new attributes using a combination of the Item.X.Attribute.Y.Name and Item.X.Attribute.Y.Value parameters. The client may specify the first attribute for the first item using the parameters Item.0.Attribute.0.Name and Item.0.Attribute.0.Value, and for the second attribute for the first item by the parameters Item.0.Attribute.1.Name and Item.0.Attribute.1.Value, and so on.

Attributes are uniquely identified within an item by their name/value combination. For example, a single item can have the attributes { "first_name", "first_value" } and { "first_name", "second_value" }. However, it cannot have two attribute instances where both the Item.X.Attribute.Y.Name and Item.X.Attribute.Y.Value are the same.

Optionally, the requester can supply the Replace parameter for each individual value. Setting this value to true will cause the new attribute values to replace the existing attribute values. For example, if an item I has the attributes { 'a', '1' }, { 'b', '2'} and { 'b', '3' } and the requester does a BatchPutAttributes of {'I', 'b', '4' } with the Replace parameter set to true, the final attributes of the item will be { 'a', '1' } and { 'b', '4' }, replacing the previous values of the 'b' attribute with the new value.

This operation is vulnerable to exceeding the maximum URL size when making a REST request using the HTTP GET method. This operation does not support conditions using Expected.X.Name, Expected.X.Value, or Expected.X.Exists.

You can execute multiple BatchPutAttributes operations and other operations in parallel. However, large numbers of concurrent BatchPutAttributes calls can result in Service Unavailable (503) responses.

The following limitations are enforced for this operation:

• 256 attribute name-value pairs per item
• 1 MB request size
• 1 billion attributes per domain
• 10 GB of total user data storage per domain
• 25 item limit per BatchPutAttributes operation

Examples:

Request syntax with placeholder values

resp = client.batch_put_attributes({
  domain_name: "String", # required
  items: [ # required
    {
      name: "String", # required
      attributes: [ # required
        {
          name: "String", # required
          value: "String", # required
          replace: false,
        },
      ],
    },
  ],
})

Options Hash (options):

• :domain_name (required, String) —

  The name of the domain in which the attributes are being stored.

• :items (required, Array<Types::ReplaceableItem>) —

  A list of items on which to perform the operation.

Returns:

• (Struct) —

  Returns an empty response.

#create_domain(options = {}) ⇒ Struct

The CreateDomain operation creates a new domain. The domain name should be unique among the domains associated with the Access Key ID provided in the request. The CreateDomain operation may take 10 or more seconds to complete.

The client can create up to 100 domains per account.

If the client requires additional domains, go to http://aws.amazon.com/contact-us/simpledb-limit-request/.

Examples:

Request syntax with placeholder values

resp = client.create_domain({
  domain_name: "String", # required
})

Options Hash (options):

• :domain_name (required, String) —

  The name of the domain to create. The name can range between 3 and 255 characters and can contain the following characters: a-z, A-Z, 0-9, \'_\', \'-\', and \'.\'.

Returns:

• (Struct) —

  Returns an empty response.

#delete_attributes(options = {}) ⇒ Struct

Deletes one or more attributes associated with an item. If all attributes of the item are deleted, the item is deleted.

DeleteAttributes is an idempotent operation; running it multiple times on the same item or attribute does not result in an error response.

Because Amazon SimpleDB makes multiple copies of item data and uses an eventual consistency update model, performing a GetAttributes or Select operation (read) immediately after a DeleteAttributes or PutAttributes operation (write) might not return updated item data.

Examples:

Request syntax with placeholder values

resp = client.delete_attributes({
  domain_name: "String", # required
  item_name: "String", # required
  attributes: [
    {
      name: "String", # required
      alternate_name_encoding: "String",
      value: "String", # required
      alternate_value_encoding: "String",
    },
  ],
  expected: {
    name: "String",
    value: "String",
    exists: false,
  },
})

Options Hash (options):

• :domain_name (required, String) —

  The name of the domain in which to perform the operation.

• :item_name (required, String) —

  The name of the item. Similar to rows on a spreadsheet, items represent individual objects that contain one or more value-attribute pairs.

• :attributes (Array<Types::Attribute>) —

  A list of Attributes. Similar to columns on a spreadsheet, attributes represent categories of data that can be assigned to items.

• :expected (Types::UpdateCondition) —

  The update condition which, if specified, determines whether the specified attributes will be deleted or not. The update condition must be satisfied in order for this request to be processed and the attributes to be deleted.

Returns:

• (Struct) —

  Returns an empty response.

#delete_domain(options = {}) ⇒ Struct

The DeleteDomain operation deletes a domain. Any items (and their attributes) in the domain are deleted as well. The DeleteDomain operation might take 10 or more seconds to complete.

Examples:

Request syntax with placeholder values

resp = client.delete_domain({
  domain_name: "String", # required
})

Options Hash (options):

• :domain_name (required, String) —

  The name of the domain to delete.

Returns:

• (Struct) —

  Returns an empty response.

#domain_metadata(options = {}) ⇒ Types::DomainMetadataResult

Returns information about the domain, including when the domain was created, the number of items and attributes in the domain, and the size of the attribute names and values.

Examples:

Request syntax with placeholder values

resp = client.domain_metadata({
  domain_name: "String", # required
})

Response structure

resp.item_count #=> Integer
resp.item_names_size_bytes #=> Integer
resp.attribute_name_count #=> Integer
resp.attribute_names_size_bytes #=> Integer
resp.attribute_value_count #=> Integer
resp.attribute_values_size_bytes #=> Integer
resp.timestamp #=> Integer

Options Hash (options):

• :domain_name (required, String) —

  The name of the domain for which to display the metadata of.

Returns:

• (Types::DomainMetadataResult) —

  Returns a response object which responds to the following methods:

  • #item_count => Integer
  • #item_names_size_bytes => Integer
  • #attribute_name_count => Integer
  • #attribute_names_size_bytes => Integer
  • #attribute_value_count => Integer
  • #attribute_values_size_bytes => Integer
  • #timestamp => Integer

#get_attributes(options = {}) ⇒ Types::GetAttributesResult

Returns all of the attributes associated with the specified item. Optionally, the attributes returned can be limited to one or more attributes by specifying an attribute name parameter.

If the item does not exist on the replica that was accessed for this operation, an empty set is returned. The system does not return an error as it cannot guarantee the item does not exist on other replicas.

Examples:

Request syntax with placeholder values

resp = client.get_attributes({
  domain_name: "String", # required
  item_name: "String", # required
  attribute_names: ["String"],
  consistent_read: false,
})

Response structure

resp.attributes #=> Array
resp.attributes[0].name #=> String
resp.attributes[0].alternate_name_encoding #=> String
resp.attributes[0].value #=> String
resp.attributes[0].alternate_value_encoding #=> String

Options Hash (options):

• :domain_name (required, String) —

  The name of the domain in which to perform the operation.

• :item_name (required, String) —

  The name of the item.

• :attribute_names (Array<String>) —

  The names of the attributes.

• :consistent_read (Boolean) —

  Determines whether or not strong consistency should be enforced when data is read from SimpleDB. If true, any data previously written to SimpleDB will be returned. Otherwise, results will be consistent eventually, and the client may not see data that was written immediately before your read.

Returns:

• (Types::GetAttributesResult) —

  Returns a response object which responds to the following methods:

  • #attributes => Array<Types::Attribute>

#list_domains(options = {}) ⇒ Types::ListDomainsResult

The ListDomains operation lists all domains associated with the Access Key ID. It returns domain names up to the limit set by MaxNumberOfDomains. A NextToken is returned if there are more than MaxNumberOfDomains domains. Calling ListDomains successive times with the NextToken provided by the operation returns up to MaxNumberOfDomains more domain names with each successive operation call.

Examples:

Request syntax with placeholder values

resp = client.list_domains({
  max_number_of_domains: 1,
  next_token: "String",
})

Response structure

resp.domain_names #=> Array
resp.domain_names[0] #=> String
resp.next_token #=> String

Options Hash (options):

• :max_number_of_domains (Integer) —

  The maximum number of domain names you want returned. The range is 1 to 100. The default setting is 100.

• :next_token (String) —

  A string informing Amazon SimpleDB where to start the next list of domain names.

Returns:

• (Types::ListDomainsResult) —

  Returns a response object which responds to the following methods:

  • #domain_names => Array<String>
  • #next_token => String

#put_attributes(options = {}) ⇒ Struct

The PutAttributes operation creates or replaces attributes in an item. The client may specify new attributes using a combination of the Attribute.X.Name and Attribute.X.Value parameters. The client specifies the first attribute by the parameters Attribute.0.Name and Attribute.0.Value, the second attribute by the parameters Attribute.1.Name and Attribute.1.Value, and so on.

Attributes are uniquely identified in an item by their name/value combination. For example, a single item can have the attributes { "first_name", "first_value" } and { "first_name", second_value" }. However, it cannot have two attribute instances where both the Attribute.X.Name and Attribute.X.Value are the same.

Optionally, the requestor can supply the Replace parameter for each individual attribute. Setting this value to true causes the new attribute value to replace the existing attribute value(s). For example, if an item has the attributes { 'a', '1' }, { 'b', '2'} and { 'b', '3' } and the requestor calls PutAttributes using the attributes { 'b', '4' } with the Replace parameter set to true, the final attributes of the item are changed to { 'a', '1' } and { 'b', '4' }, which replaces the previous values of the 'b' attribute with the new value.

You cannot specify an empty string as an attribute name.

Because Amazon SimpleDB makes multiple copies of client data and uses an eventual consistency update model, an immediate GetAttributes or Select operation (read) immediately after a PutAttributes or DeleteAttributes operation (write) might not return the updated data.

The following limitations are enforced for this operation:

• 256 total attribute name-value pairs per item
• One billion attributes per domain
• 10 GB of total user data storage per domain

Examples:

Request syntax with placeholder values

resp = client.put_attributes({
  domain_name: "String", # required
  item_name: "String", # required
  attributes: [ # required
    {
      name: "String", # required
      value: "String", # required
      replace: false,
    },
  ],
  expected: {
    name: "String",
    value: "String",
    exists: false,
  },
})

Options Hash (options):

• :domain_name (required, String) —

  The name of the domain in which to perform the operation.

• :item_name (required, String) —

  The name of the item.

• :attributes (required, Array<Types::ReplaceableAttribute>) —

  The list of attributes.

• :expected (Types::UpdateCondition) —

  The update condition which, if specified, determines whether the specified attributes will be updated or not. The update condition must be satisfied in order for this request to be processed and the attributes to be updated.

Returns:

• (Struct) —

  Returns an empty response.

#select(options = {}) ⇒ Types::SelectResult

The Select operation returns a set of attributes for ItemNames that match the select expression. Select is similar to the standard SQL SELECT statement.

The total size of the response cannot exceed 1 MB in total size. Amazon SimpleDB automatically adjusts the number of items returned per page to enforce this limit. For example, if the client asks to retrieve 2500 items, but each individual item is 10 kB in size, the system returns 100 items and an appropriate NextToken so the client can access the next page of results.

For information on how to construct select expressions, see Using Select to Create Amazon SimpleDB Queries in the Developer Guide.

Examples:

Request syntax with placeholder values

resp = client.select({
  select_expression: "String", # required
  next_token: "String",
  consistent_read: false,
})

Response structure

resp.items #=> Array
resp.items[0].name #=> String
resp.items[0].alternate_name_encoding #=> String
resp.items[0].attributes #=> Array
resp.items[0].attributes[0].name #=> String
resp.items[0].attributes[0].alternate_name_encoding #=> String
resp.items[0].attributes[0].value #=> String
resp.items[0].attributes[0].alternate_value_encoding #=> String
resp.next_token #=> String

Options Hash (options):

• :select_expression (required, String) —

  The expression used to query the domain.

• :next_token (String) —

  A string informing Amazon SimpleDB where to start the next list of ItemNames.

• :consistent_read (Boolean) —

  Determines whether or not strong consistency should be enforced when data is read from SimpleDB. If true, any data previously written to SimpleDB will be returned. Otherwise, results will be consistent eventually, and the client may not see data that was written immediately before your read.

Returns:

• (Types::SelectResult) —

  Returns a response object which responds to the following methods:

  • #items => Array<Types::Item>
  • #next_token => String

#wait_until(waiter_name, params = {}) {|waiter| ... } ⇒ Boolean

Waiters polls an API operation until a resource enters a desired state.

Basic Usage

Waiters will poll until they are succesful, they fail by entering a terminal state, or until a maximum number of attempts are made.

# polls in a loop, sleeping between attempts client.waiter_until(waiter_name, params)

Configuration

You can configure the maximum number of polling attempts, and the delay (in seconds) between each polling attempt. You configure waiters by passing a block to #wait_until:

# poll for ~25 seconds
client.wait_until(...) do |w|
  w.max_attempts = 5
  w.delay = 5
end

Callbacks

You can be notified before each polling attempt and before each delay. If you throw :success or :failure from these callbacks, it will terminate the waiter.

started_at = Time.now
client.wait_until(...) do |w|

  # disable max attempts
  w.max_attempts = nil

  # poll for 1 hour, instead of a number of attempts
  w.before_wait do |attempts, response|
    throw :failure if Time.now - started_at > 3600
  end

end

Handling Errors

When a waiter is successful, it returns true. When a waiter fails, it raises an error. All errors raised extend from Waiters::Errors::WaiterFailed.

begin
  client.wait_until(...)
rescue Aws::Waiters::Errors::WaiterFailed
  # resource did not enter the desired state in time
end

Parameters:

• waiter_name (Symbol) —

  The name of the waiter. See #waiter_names for a full list of supported waiters.

• params (Hash) (defaults to: {}) —

  Additional request parameters. See the #waiter_names for a list of supported waiters and what request they call. The called request determines the list of accepted parameters.

Yield Parameters:

• waiter (Waiters::Waiter) —

  Yields a Waiter object that can be configured prior to waiting.

Returns:

• (Boolean) —

  Returns true if the waiter was successful.

Raises:

• (Errors::FailureStateError) —

  Raised when the waiter terminates because the waiter has entered a state that it will not transition out of, preventing success.

• (Errors::TooManyAttemptsError) —

  Raised when the configured maximum number of attempts have been made, and the waiter is not yet successful.

• (Errors::UnexpectedError) —

  Raised when an error is encounted while polling for a resource that is not expected.

• (Errors::NoSuchWaiterError) —

  Raised when you request to wait for an unknown state.

#waiter_names ⇒ Array<Symbol>

Returns the list of supported waiters. The following table lists the supported waiters and the client method they call:

Waiter Name	Client Method	Default Delay:	Default Max Attempts:

Returns:

• (Array<Symbol>) —

  the list of supported waiters.