Class: Google::Cloud::RecommendationEngine::V1beta1::PredictionService::Rest::Client

Inherits:
Object
  • Object
show all
Includes:
Paths
Defined in:
lib/google/cloud/recommendation_engine/v1beta1/prediction_service/rest/client.rb

Overview

REST client for the PredictionService service.

Service for making recommendation prediction.

Defined Under Namespace

Classes: Configuration

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Paths

#placement_path

Constructor Details

#initialize {|config| ... } ⇒ Client

Create a new PredictionService REST client object.

Examples:


# Create a client using the default configuration
client = ::Google::Cloud::RecommendationEngine::V1beta1::PredictionService::Rest::Client.new

# Create a client using a custom configuration
client = ::Google::Cloud::RecommendationEngine::V1beta1::PredictionService::Rest::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/recommendation_engine/v1beta1/prediction_service/rest/client.rb', line 116

def initialize
  # 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 == Client.configure.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 = ::Google::Cloud::RecommendationEngine::V1beta1::PredictionService::Rest::ServiceStub.new endpoint: @config.endpoint, credentials: credentials
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::RecommendationEngine::V1beta1::PredictionService::Rest::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/recommendation_engine/v1beta1/prediction_service/rest/client.rb', line 58

def self.configure
  @configure ||= begin
    namespace = ["Google", "Cloud", "RecommendationEngine", "V1beta1"]
    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.rpcs.predict.timeout = 600.0
    default_config.rpcs.predict.retry_policy = {
      initial_delay: 0.1, max_delay: 60.0, 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/recommendation_engine/v1beta1/prediction_service/rest/client.rb', line 95

def configure
  yield @config if block_given?
  @config
end

#predict(request, options = nil) ⇒ ::Gapic::Rest::PagedEnumerable<::String, ::Google::Protobuf::Value> #predict(name: nil, user_event: nil, page_size: nil, page_token: nil, filter: nil, dry_run: nil, params: nil, labels: nil) ⇒ ::Gapic::Rest::PagedEnumerable<::String, ::Google::Protobuf::Value>

Makes a recommendation prediction. If using API Key based authentication, the API Key must be registered using the PredictionApiKeyRegistry service. Learn more.

Overloads:

  • #predict(request, options = nil) ⇒ ::Gapic::Rest::PagedEnumerable<::String, ::Google::Protobuf::Value>

    Pass arguments to predict via a request object, either of type Google::Cloud::RecommendationEngine::V1beta1::PredictRequest or an equivalent Hash.

    Parameters:

    • request (::Google::Cloud::RecommendationEngine::V1beta1::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(name: nil, user_event: nil, page_size: nil, page_token: nil, filter: nil, dry_run: nil, params: nil, labels: nil) ⇒ ::Gapic::Rest::PagedEnumerable<::String, ::Google::Protobuf::Value>

    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:

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

      Required. Full resource name of the format: {name=projects/*/locations/global/catalogs/default_catalog/eventStores/default_event_store/placements/*} The id of the recommendation engine placement. This id is used to identify the set of models that will be used to make the prediction.

      We currently support three placements with the following IDs by default:

      • shopping_cart: Predicts items frequently bought together with one or more catalog items in the same shopping session. Commonly displayed after add-to-cart events, on product detail pages, or on the shopping cart page.

      • home_page: Predicts the next product that a user will most likely engage with or purchase based on the shopping or viewing history of the specified userId or visitorId. For example - Recommendations for you.

      • product_detail: Predicts the next product that a user will most likely engage with or purchase. The prediction is based on the shopping or viewing history of the specified userId or visitorId and its relevance to a specified CatalogItem. Typically used on product detail pages. For example - More items like this.

      • recently_viewed_default: Returns up to 75 items recently viewed by the specified userId or visitorId, most recent ones first. Returns nothing if neither of them has viewed any items yet. For example - Recently viewed.

      The full list of available placements can be seen at https://console.cloud.google.com/recommendation/datafeeds/default_catalog/dashboard

    • user_event (::Google::Cloud::RecommendationEngine::V1beta1::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.

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

      Optional. Maximum number of results to return per page. Set this property to the number of prediction results required. If zero, the service will choose a reasonable default.

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

      Optional. The previous PredictResponse.next_page_token.

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

      Optional. Filter for restricting prediction results. Accepts values for tags and the filterOutOfStockItems flag.

      • Tag expressions. Restricts predictions to items 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 KiB.

      • filterOutOfStockItems. Restricts predictions to items 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
    • dry_run (::Boolean) (defaults to: nil) —

      Optional. Use dryRun mode for this prediction query. If set to true, a dummy model will be used that returns arbitrary catalog items. Note that the dryRun 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) —

      Optional. Additional domain specific parameters for the predictions.

      Allowed values:

      • returnCatalogItem: Boolean. If set to true, the associated catalogItem object will be returned in the PredictResponse.PredictionResult.itemMetadata object in the method response.
      • returnItemScore: Boolean. If set to true, the prediction 'score' corresponding to each returned item will be set in the metadata field in the prediction response. The given 'score' indicates the probability of an item being clicked/purchased given the user's context and history.
    • labels (::Hash{::String => ::String}) (defaults to: nil) —

      Optional. The labels for the predict request.

      • Label keys can contain lowercase letters, digits and hyphens, must start with a letter, and must end with a letter or digit.
      • Non-zero label values can contain lowercase letters, digits and hyphens, must start with a letter, and must end with a letter or digit.
      • No more than 64 labels can be associated with a given request.

      See https://goo.gl/xmQnxf for more information on and examples of labels.

Yields:

  • (result, operation) —

    Access the result along with the TransportOperation object

Yield Parameters:

Returns:

Raises:

  • (::Google::Cloud::Error) —

    if the REST call is aborted.



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# File 'lib/google/cloud/recommendation_engine/v1beta1/prediction_service/rest/client.rb', line 260

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

  request = ::Gapic::Protobuf.coerce request, to: ::Google::Cloud::RecommendationEngine::V1beta1::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
  call_metadata = @config.rpcs.predict.metadata.to_h

  # Set x-goog-api-client and x-goog-user-project headers
  call_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::RecommendationEngine::V1beta1::VERSION,
    transports_version_send: [:rest]

  call_metadata[:"x-goog-user-project"] = @quota_project_id if @quota_project_id

  options.apply_defaults timeout:      @config.rpcs.predict.timeout,
                         metadata:     call_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.predict request, options do |result, operation|
    result = ::Gapic::Rest::PagedEnumerable.new @prediction_service_stub, :predict, "metadata", request, result, options
    yield result, operation if block_given?
    return result
  end
rescue ::Gapic::Rest::Error => e
  raise ::Google::Cloud::Error.from_error(e)
end