Class: Google::Cloud::Retail::V2::PredictionService::Client

Inherits:
Object
  • Object
show all
Includes:
Paths
Defined in:
lib/google/cloud/retail/v2/prediction_service/client.rb

Overview

Client for the PredictionService service.

Service for making recommendation prediction.

Defined Under Namespace

Classes: Configuration

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Paths

#product_path

Constructor Details

#initialize {|config| ... } ⇒ Client

Create a new PredictionService client object.

Examples:


# Create a client using the default configuration
client = ::Google::Cloud::Retail::V2::PredictionService::Client.new

# Create a client using a custom configuration
client = ::Google::Cloud::Retail::V2::PredictionService::Client.new do |config|
  config.timeout = 10.0
end

Yields:

  • (config) —

    Configure the PredictionService client.

Yield Parameters:



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# File 'lib/google/cloud/retail/v2/prediction_service/client.rb', line 130

def initialize
  # These require statements are intentionally placed here to initialize
  # the gRPC module only when it's required.
  # See https://github.com/googleapis/toolkit/issues/446
  require "gapic/grpc"
  require "google/cloud/retail/v2/prediction_service_services_pb"

  # Create the configuration object
  @config = Configuration.new Client.configure

  # Yield the configuration if needed
  yield @config if block_given?

  # Create credentials
  credentials = @config.credentials
  # Use self-signed JWT if the endpoint is unchanged from default,
  # but only if the default endpoint does not have a region prefix.
  enable_self_signed_jwt = @config.endpoint.nil? ||
                           (@config.endpoint == Configuration::DEFAULT_ENDPOINT &&
                           !@config.endpoint.split(".").first.include?("-"))
  credentials ||= Credentials.default scope: @config.scope,
                                      enable_self_signed_jwt: enable_self_signed_jwt
  if credentials.is_a?(::String) || credentials.is_a?(::Hash)
    credentials = Credentials.new credentials, scope: @config.scope
  end
  @quota_project_id = @config.quota_project
  @quota_project_id ||= credentials.quota_project_id if credentials.respond_to? :quota_project_id

  @prediction_service_stub = ::Gapic::ServiceStub.new(
    ::Google::Cloud::Retail::V2::PredictionService::Stub,
    credentials: credentials,
    endpoint: @config.endpoint,
    endpoint_template: DEFAULT_ENDPOINT_TEMPLATE,
    universe_domain: @config.universe_domain,
    channel_args: @config.channel_args,
    interceptors: @config.interceptors,
    channel_pool_config: @config.channel_pool
  )

  @location_client = Google::Cloud::Location::Locations::Client.new do |config|
    config.credentials = credentials
    config.quota_project = @quota_project_id
    config.endpoint = @prediction_service_stub.endpoint
    config.universe_domain = @prediction_service_stub.universe_domain
  end
end

Instance Attribute Details

#location_client ⇒ Google::Cloud::Location::Locations::Client (readonly)

Get the associated client for mix-in of the Locations.

Returns:

  • (Google::Cloud::Location::Locations::Client) 


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# File 'lib/google/cloud/retail/v2/prediction_service/client.rb', line 182

def location_client
  @location_client
end

Class Method Details

.configure {|config| ... } ⇒ Client::Configuration

Configure the PredictionService Client class.

See Configuration for a description of the configuration fields.

Examples:


# Modify the configuration for all PredictionService clients
::Google::Cloud::Retail::V2::PredictionService::Client.configure do |config|
  config.timeout = 10.0
end

Yields:

  • (config) —

    Configure the Client client.

Yield Parameters:

Returns:



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# File 'lib/google/cloud/retail/v2/prediction_service/client.rb', line 63

def self.configure
  @configure ||= begin
    namespace = ["Google", "Cloud", "Retail", "V2"]
    parent_config = while namespace.any?
                      parent_name = namespace.join "::"
                      parent_const = const_get parent_name
                      break parent_const.configure if parent_const.respond_to? :configure
                      namespace.pop
                    end
    default_config = Client::Configuration.new parent_config

    default_config.timeout = 5.0
    default_config.retry_policy = {
      initial_delay: 0.1, max_delay: 5.0, multiplier: 1.3, retry_codes: [14, 4]
    }

    default_config
  end
  yield @configure if block_given?
  @configure
end

Instance Method Details

#configure {|config| ... } ⇒ Client::Configuration

Configure the PredictionService Client instance.

The configuration is set to the derived mode, meaning that values can be changed, but structural changes (adding new fields, etc.) are not allowed. Structural changes should be made on configure.

See Configuration for a description of the configuration fields.

Yields:

  • (config) —

    Configure the Client client.

Yield Parameters:

Returns:



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# File 'lib/google/cloud/retail/v2/prediction_service/client.rb', line 100

def configure
  yield @config if block_given?
  @config
end

#predict(request, options = nil) ⇒ ::Google::Cloud::Retail::V2::PredictResponse #predict(placement: nil, user_event: nil, page_size: nil, page_token: nil, filter: nil, validate_only: nil, params: nil, labels: nil) ⇒ ::Google::Cloud::Retail::V2::PredictResponse

Makes a recommendation prediction.

Examples:

Basic example

require "google/cloud/retail/v2"

# Create a client object. The client can be reused for multiple calls.
client = Google::Cloud::Retail::V2::PredictionService::Client.new

# Create a request. To set request fields, pass in keyword arguments.
request = Google::Cloud::Retail::V2::PredictRequest.new

# Call the predict method.
result = client.predict request

# The returned object is of type Google::Cloud::Retail::V2::PredictResponse.
p result

Overloads:

  • #predict(request, options = nil) ⇒ ::Google::Cloud::Retail::V2::PredictResponse

    Pass arguments to predict via a request object, either of type Google::Cloud::Retail::V2::PredictRequest or an equivalent Hash.

    Parameters:

    • request (::Google::Cloud::Retail::V2::PredictRequest, ::Hash) —

      A request object representing the call parameters. Required. To specify no parameters, or to keep all the default parameter values, pass an empty Hash.

    • options (::Gapic::CallOptions, ::Hash) (defaults to: nil) —

      Overrides the default settings for this call, e.g, timeout, retries, etc. Optional.

  • #predict(placement: nil, user_event: nil, page_size: nil, page_token: nil, filter: nil, validate_only: nil, params: nil, labels: nil) ⇒ ::Google::Cloud::Retail::V2::PredictResponse

    Pass arguments to predict via keyword arguments. Note that at least one keyword argument is required. To specify no parameters, or to keep all the default parameter values, pass an empty Hash as a request object (see above).

    Parameters:

    • placement (::String) (defaults to: nil) —

      Required. Full resource name of the format: {placement=projects/*/locations/global/catalogs/default_catalog/servingConfigs/*} or {placement=projects/*/locations/global/catalogs/default_catalog/placements/*}. We recommend using the servingConfigs resource. placements is a legacy resource. The ID of the Recommendations AI serving config or placement. Before you can request predictions from your model, you must create at least one serving config or placement for it. For more information, see Manage serving configs.

      The full list of available serving configs can be seen at https://console.cloud.google.com/ai/retail/catalogs/default_catalog/configs

    • user_event (::Google::Cloud::Retail::V2::UserEvent, ::Hash) (defaults to: nil) —

      Required. Context about the user, what they are looking at and what action they took to trigger the predict request. Note that this user event detail won't be ingested to userEvent logs. Thus, a separate userEvent write request is required for event logging.

      Don't set UserEvent.visitor_id or UserInfo.user_id to the same fixed ID for different users. If you are trying to receive non-personalized recommendations (not recommended; this can negatively impact model performance), instead set UserEvent.visitor_id to a random unique ID and leave UserInfo.user_id unset.

    • page_size (::Integer) (defaults to: nil) —

      Maximum number of results to return. Set this property to the number of prediction results needed. If zero, the service will choose a reasonable default. The maximum allowed value is 100. Values above 100 will be coerced to 100.

    • page_token (::String) (defaults to: nil) —

      This field is not used; leave it unset.

    • filter (::String) (defaults to: nil) —

      Filter for restricting prediction results with a length limit of 5,000 characters. Accepts values for tags and the filterOutOfStockItems flag.

      • Tag expressions. Restricts predictions to products that match all of the specified tags. Boolean operators OR and NOT are supported if the expression is enclosed in parentheses, and must be separated from the tag values by a space. -"tagA" is also supported and is equivalent to NOT "tagA". Tag values must be double quoted UTF-8 encoded strings with a size limit of 1,000 characters.

      Note: "Recently viewed" models don't support tag filtering at the moment.

      • filterOutOfStockItems. Restricts predictions to products that do not have a stockState value of OUT_OF_STOCK.

      Examples:

      • tag=("Red" OR "Blue") tag="New-Arrival" tag=(NOT "promotional")
      • filterOutOfStockItems tag=(-"promotional")
      • filterOutOfStockItems

      If your filter blocks all prediction results, the API will return no results. If instead you want empty result sets to return generic (unfiltered) popular products, set strictFiltering to False in PredictRequest.params. Note that the API will never return items with storageStatus of "EXPIRED" or "DELETED" regardless of filter choices.

      If filterSyntaxV2 is set to true under the params field, then attribute-based expressions are expected instead of the above described tag-based syntax. Examples:

      • (colors: ANY("Red", "Blue")) AND NOT (categories: ANY("Phones"))
      • (availability: ANY("IN_STOCK")) AND (colors: ANY("Red") OR categories: ANY("Phones"))

      For more information, see Filter recommendations.

    • validate_only (::Boolean) (defaults to: nil) —

      Use validate only mode for this prediction query. If set to true, a dummy model will be used that returns arbitrary products. Note that the validate only mode should only be used for testing the API, or if the model is not ready.

    • params (::Hash{::String => ::Google::Protobuf::Value, ::Hash}) (defaults to: nil) —

      Additional domain specific parameters for the predictions.

      Allowed values:

      • returnProduct: Boolean. If set to true, the associated product object will be returned in the results.metadata field in the prediction response.
      • returnScore: Boolean. If set to true, the prediction 'score' corresponding to each returned product will be set in the results.metadata field in the prediction response. The given 'score' indicates the probability of a product being clicked/purchased given the user's context and history.
      • strictFiltering: Boolean. True by default. If set to false, the service will return generic (unfiltered) popular products instead of empty if your filter blocks all prediction results.
      • priceRerankLevel: String. Default empty. If set to be non-empty, then it needs to be one of 'low-price-reranking', 'medium-price-reranking', 'high-price-reranking'. This gives request-level control and adjusts prediction results based on product price.
      • diversityLevel: String. Default empty. If set to be non-empty, then it needs to be one of 'low-diversity', 'medium-diversity', 'high-diversity', 'auto-diversity'. This gives request-level control and adjusts prediction results based on product category.
      • filterSyntaxV2: Boolean. False by default. If set to true, the filter field is interpreteted according to the new, attribute-based syntax.
    • labels (::Hash{::String => ::String}) (defaults to: nil) —

      The labels applied to a resource must meet the following requirements:

      • Each resource can have multiple labels, up to a maximum of 64.
      • Each label must be a key-value pair.
      • Keys have a minimum length of 1 character and a maximum length of 63 characters and cannot be empty. Values can be empty and have a maximum length of 63 characters.
      • Keys and values can contain only lowercase letters, numeric characters, underscores, and dashes. All characters must use UTF-8 encoding, and international characters are allowed.
      • The key portion of a label must be unique. However, you can use the same key with multiple resources.
      • Keys must start with a lowercase letter or international character.

      See Google Cloud Document for more details.

Yields:

  • (response, operation) —

    Access the result along with the RPC operation

Yield Parameters:

Returns:

Raises:

  • (::Google::Cloud::Error) —

    if the RPC is aborted.



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# File 'lib/google/cloud/retail/v2/prediction_service/client.rb', line 356

def predict request, options = nil
  raise ::ArgumentError, "request must be provided" if request.nil?

  request = ::Gapic::Protobuf.coerce request, to: ::Google::Cloud::Retail::V2::PredictRequest

  # Converts hash and nil to an options object
  options = ::Gapic::CallOptions.new(**options.to_h) if options.respond_to? :to_h

  # Customize the options with defaults
  metadata = @config.rpcs.predict.metadata.to_h

  # Set x-goog-api-client, x-goog-user-project and x-goog-api-version headers
  metadata[:"x-goog-api-client"] ||= ::Gapic::Headers.x_goog_api_client \
    lib_name: @config.lib_name, lib_version: @config.lib_version,
    gapic_version: ::Google::Cloud::Retail::V2::VERSION
  metadata[:"x-goog-api-version"] = API_VERSION unless API_VERSION.empty?
  metadata[:"x-goog-user-project"] = @quota_project_id if @quota_project_id

  header_params = {}
  if request.placement
    header_params["placement"] = request.placement
  end

  request_params_header = header_params.map { |k, v| "#{k}=#{v}" }.join("&")
  metadata[:"x-goog-request-params"] ||= request_params_header

  options.apply_defaults timeout:      @config.rpcs.predict.timeout,
                         metadata:     metadata,
                         retry_policy: @config.rpcs.predict.retry_policy

  options.apply_defaults timeout:      @config.timeout,
                         metadata:     @config.metadata,
                         retry_policy: @config.retry_policy

  @prediction_service_stub.call_rpc :predict, request, options: options do |response, operation|
    yield response, operation if block_given?
    return response
  end
rescue ::GRPC::BadStatus => e
  raise ::Google::Cloud::Error.from_error(e)
end

#universe_domain ⇒ String

The effective universe domain

Returns:

  • (String) 


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# File 'lib/google/cloud/retail/v2/prediction_service/client.rb', line 110

def universe_domain
  @prediction_service_stub.universe_domain
end