# frozen_string_literal: true

# Copyright 2020 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Auto-generated by gapic-generator-ruby. DO NOT EDIT!

require "google/cloud/errors"
require "google/datastore/admin/v1/datastore_admin_pb"

module Google
  module Cloud
    module Datastore
      module Admin
        module V1
          module DatastoreAdmin
            ##
            # Client for the DatastoreAdmin service.
            #
            # Google Cloud Datastore Admin API
            #
            #
            # The Datastore Admin API provides several admin services for Cloud Datastore.
            #
            # -----------------------------------------------------------------------------
            # ## Concepts
            #
            # Project, namespace, kind, and entity as defined in the Google Cloud Datastore
            # API.
            #
            # Operation: An Operation represents work being performed in the background.
            #
            # EntityFilter: Allows specifying a subset of entities in a project. This is
            # specified as a combination of kinds and namespaces (either or both of which
            # may be all).
            #
            # -----------------------------------------------------------------------------
            # ## Services
            #
            # # Export/Import
            #
            # The Export/Import service provides the ability to copy all or a subset of
            # entities to/from Google Cloud Storage.
            #
            # Exported data may be imported into Cloud Datastore for any Google Cloud
            # Platform project. It is not restricted to the export source project. It is
            # possible to export from one project and then import into another.
            #
            # Exported data can also be loaded into Google BigQuery for analysis.
            #
            # Exports and imports are performed asynchronously. An Operation resource is
            # created for each export/import. The state (including any errors encountered)
            # of the export/import may be queried via the Operation resource.
            #
            # # Index
            #
            # The index service manages Cloud Datastore composite indexes.
            #
            # Index creation and deletion are performed asynchronously.
            # An Operation resource is created for each such asynchronous operation.
            # The state of the operation (including any errors encountered)
            # may be queried via the Operation resource.
            #
            # # Operation
            #
            # The Operations collection provides a record of actions performed for the
            # specified project (including any operations in progress). Operations are not
            # created directly but through calls on other collections or resources.
            #
            # An operation that is not yet done may be cancelled. The request to cancel is
            # asynchronous and the operation may continue to run for some time after the
            # request to cancel is made.
            #
            # An operation that is done may be deleted so that it is no longer listed as
            # part of the Operation collection.
            #
            # ListOperations returns all pending operations, but not completed operations.
            #
            # Operations are created by service DatastoreAdmin,
            # but are accessed via service google.longrunning.Operations.
            #
            class Client
              # @private
              attr_reader :datastore_admin_stub

              ##
              # Configure the DatastoreAdmin Client class.
              #
              # See {::Google::Cloud::Datastore::Admin::V1::DatastoreAdmin::Client::Configuration}
              # for a description of the configuration fields.
              #
              # ## Example
              #
              # To modify the configuration for all DatastoreAdmin clients:
              #
              #     ::Google::Cloud::Datastore::Admin::V1::DatastoreAdmin::Client.configure do |config|
              #       config.timeout = 10.0
              #     end
              #
              # @yield [config] Configure the Client client.
              # @yieldparam config [Client::Configuration]
              #
              # @return [Client::Configuration]
              #
              def self.configure
                @configure ||= begin
                  namespace = ["Google", "Cloud", "Datastore", "Admin", "V1"]
                  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.export_entities.timeout = 60.0

                  default_config.rpcs.import_entities.timeout = 60.0

                  default_config.rpcs.get_index.timeout = 60.0
                  default_config.rpcs.get_index.retry_policy = {
                    initial_delay: 0.1,
                    max_delay:     60.0,
                    multiplier:    1.3,
                    retry_codes:   [14, 4]
                  }

                  default_config.rpcs.list_indexes.timeout = 60.0
                  default_config.rpcs.list_indexes.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

              ##
              # Configure the DatastoreAdmin 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 {Client.configure}.
              #
              # See {::Google::Cloud::Datastore::Admin::V1::DatastoreAdmin::Client::Configuration}
              # for a description of the configuration fields.
              #
              # @yield [config] Configure the Client client.
              # @yieldparam config [Client::Configuration]
              #
              # @return [Client::Configuration]
              #
              def configure
                yield @config if block_given?
                @config
              end

              ##
              # Create a new DatastoreAdmin client object.
              #
              # ## Examples
              #
              # To create a new DatastoreAdmin client with the default
              # configuration:
              #
              #     client = ::Google::Cloud::Datastore::Admin::V1::DatastoreAdmin::Client.new
              #
              # To create a new DatastoreAdmin client with a custom
              # configuration:
              #
              #     client = ::Google::Cloud::Datastore::Admin::V1::DatastoreAdmin::Client.new do |config|
              #       config.timeout = 10.0
              #     end
              #
              # @yield [config] Configure the DatastoreAdmin client.
              # @yieldparam config [Client::Configuration]
              #
              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/datastore/admin/v1/datastore_admin_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
                credentials ||= Credentials.default scope: @config.scope
                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

                @operations_client = Operations.new do |config|
                  config.credentials = credentials
                  config.endpoint = @config.endpoint
                end

                @datastore_admin_stub = ::Gapic::ServiceStub.new(
                  ::Google::Cloud::Datastore::Admin::V1::DatastoreAdmin::Stub,
                  credentials:  credentials,
                  endpoint:     @config.endpoint,
                  channel_args: @config.channel_args,
                  interceptors: @config.interceptors
                )
              end

              ##
              # Get the associated client for long-running operations.
              #
              # @return [::Google::Cloud::Datastore::Admin::V1::DatastoreAdmin::Operations]
              #
              attr_reader :operations_client

              # Service calls

              ##
              # Exports a copy of all or a subset of entities from Google Cloud Datastore
              # to another storage system, such as Google Cloud Storage. Recent updates to
              # entities may not be reflected in the export. The export occurs in the
              # background and its progress can be monitored and managed via the
              # Operation resource that is created. The output of an export may only be
              # used once the associated operation is done. If an export operation is
              # cancelled before completion it may leave partial data behind in Google
              # Cloud Storage.
              #
              # @overload export_entities(request, options = nil)
              #   Pass arguments to `export_entities` via a request object, either of type
              #   {::Google::Cloud::Datastore::Admin::V1::ExportEntitiesRequest} or an equivalent Hash.
              #
              #   @param request [::Google::Cloud::Datastore::Admin::V1::ExportEntitiesRequest, ::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.
              #   @param options [::Gapic::CallOptions, ::Hash]
              #     Overrides the default settings for this call, e.g, timeout, retries, etc. Optional.
              #
              # @overload export_entities(project_id: nil, labels: nil, entity_filter: nil, output_url_prefix: nil)
              #   Pass arguments to `export_entities` 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).
              #
              #   @param project_id [::String]
              #     Required. Project ID against which to make the request.
              #   @param labels [::Hash{::String => ::String}]
              #     Client-assigned labels.
              #   @param entity_filter [::Google::Cloud::Datastore::Admin::V1::EntityFilter, ::Hash]
              #     Description of what data from the project is included in the export.
              #   @param output_url_prefix [::String]
              #     Required. Location for the export metadata and data files.
              #
              #     The full resource URL of the external storage location. Currently, only
              #     Google Cloud Storage is supported. So output_url_prefix should be of the
              #     form: `gs://BUCKET_NAME[/NAMESPACE_PATH]`, where `BUCKET_NAME` is the
              #     name of the Cloud Storage bucket and `NAMESPACE_PATH` is an optional Cloud
              #     Storage namespace path (this is not a Cloud Datastore namespace). For more
              #     information about Cloud Storage namespace paths, see
              #     [Object name
              #     considerations](https://cloud.google.com/storage/docs/naming#object-considerations).
              #
              #     The resulting files will be nested deeper than the specified URL prefix.
              #     The final output URL will be provided in the
              #     {::Google::Cloud::Datastore::Admin::V1::ExportEntitiesResponse#output_url google.datastore.admin.v1.ExportEntitiesResponse.output_url} field. That
              #     value should be used for subsequent ImportEntities operations.
              #
              #     By nesting the data files deeper, the same Cloud Storage bucket can be used
              #     in multiple ExportEntities operations without conflict.
              #
              # @yield [response, operation] Access the result along with the RPC operation
              # @yieldparam response [::Gapic::Operation]
              # @yieldparam operation [::GRPC::ActiveCall::Operation]
              #
              # @return [::Gapic::Operation]
              #
              # @raise [::Google::Cloud::Error] if the RPC is aborted.
              #
              def export_entities request, options = nil
                raise ::ArgumentError, "request must be provided" if request.nil?

                request = ::Gapic::Protobuf.coerce request, to: ::Google::Cloud::Datastore::Admin::V1::ExportEntitiesRequest

                # 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.export_entities.metadata.to_h

                # Set x-goog-api-client and x-goog-user-project 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::Datastore::Admin::V1::VERSION
                metadata[:"x-goog-user-project"] = @quota_project_id if @quota_project_id

                header_params = {
                  "project_id" => request.project_id
                }
                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.export_entities.timeout,
                                       metadata:     metadata,
                                       retry_policy: @config.rpcs.export_entities.retry_policy
                options.apply_defaults metadata:     @config.metadata,
                                       retry_policy: @config.retry_policy

                @datastore_admin_stub.call_rpc :export_entities, request, options: options do |response, operation|
                  response = ::Gapic::Operation.new response, @operations_client, options: options
                  yield response, operation if block_given?
                  return response
                end
              rescue ::GRPC::BadStatus => e
                raise ::Google::Cloud::Error.from_error(e)
              end

              ##
              # Imports entities into Google Cloud Datastore. Existing entities with the
              # same key are overwritten. The import occurs in the background and its
              # progress can be monitored and managed via the Operation resource that is
              # created. If an ImportEntities operation is cancelled, it is possible
              # that a subset of the data has already been imported to Cloud Datastore.
              #
              # @overload import_entities(request, options = nil)
              #   Pass arguments to `import_entities` via a request object, either of type
              #   {::Google::Cloud::Datastore::Admin::V1::ImportEntitiesRequest} or an equivalent Hash.
              #
              #   @param request [::Google::Cloud::Datastore::Admin::V1::ImportEntitiesRequest, ::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.
              #   @param options [::Gapic::CallOptions, ::Hash]
              #     Overrides the default settings for this call, e.g, timeout, retries, etc. Optional.
              #
              # @overload import_entities(project_id: nil, labels: nil, input_url: nil, entity_filter: nil)
              #   Pass arguments to `import_entities` 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).
              #
              #   @param project_id [::String]
              #     Required. Project ID against which to make the request.
              #   @param labels [::Hash{::String => ::String}]
              #     Client-assigned labels.
              #   @param input_url [::String]
              #     Required. The full resource URL of the external storage location. Currently, only
              #     Google Cloud Storage is supported. So input_url should be of the form:
              #     `gs://BUCKET_NAME[/NAMESPACE_PATH]/OVERALL_EXPORT_METADATA_FILE`, where
              #     `BUCKET_NAME` is the name of the Cloud Storage bucket, `NAMESPACE_PATH` is
              #     an optional Cloud Storage namespace path (this is not a Cloud Datastore
              #     namespace), and `OVERALL_EXPORT_METADATA_FILE` is the metadata file written
              #     by the ExportEntities operation. For more information about Cloud Storage
              #     namespace paths, see
              #     [Object name
              #     considerations](https://cloud.google.com/storage/docs/naming#object-considerations).
              #
              #     For more information, see
              #     {::Google::Cloud::Datastore::Admin::V1::ExportEntitiesResponse#output_url google.datastore.admin.v1.ExportEntitiesResponse.output_url}.
              #   @param entity_filter [::Google::Cloud::Datastore::Admin::V1::EntityFilter, ::Hash]
              #     Optionally specify which kinds/namespaces are to be imported. If provided,
              #     the list must be a subset of the EntityFilter used in creating the export,
              #     otherwise a FAILED_PRECONDITION error will be returned. If no filter is
              #     specified then all entities from the export are imported.
              #
              # @yield [response, operation] Access the result along with the RPC operation
              # @yieldparam response [::Gapic::Operation]
              # @yieldparam operation [::GRPC::ActiveCall::Operation]
              #
              # @return [::Gapic::Operation]
              #
              # @raise [::Google::Cloud::Error] if the RPC is aborted.
              #
              def import_entities request, options = nil
                raise ::ArgumentError, "request must be provided" if request.nil?

                request = ::Gapic::Protobuf.coerce request, to: ::Google::Cloud::Datastore::Admin::V1::ImportEntitiesRequest

                # 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.import_entities.metadata.to_h

                # Set x-goog-api-client and x-goog-user-project 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::Datastore::Admin::V1::VERSION
                metadata[:"x-goog-user-project"] = @quota_project_id if @quota_project_id

                header_params = {
                  "project_id" => request.project_id
                }
                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.import_entities.timeout,
                                       metadata:     metadata,
                                       retry_policy: @config.rpcs.import_entities.retry_policy
                options.apply_defaults metadata:     @config.metadata,
                                       retry_policy: @config.retry_policy

                @datastore_admin_stub.call_rpc :import_entities, request, options: options do |response, operation|
                  response = ::Gapic::Operation.new response, @operations_client, options: options
                  yield response, operation if block_given?
                  return response
                end
              rescue ::GRPC::BadStatus => e
                raise ::Google::Cloud::Error.from_error(e)
              end

              ##
              # Gets an index.
              #
              # @overload get_index(request, options = nil)
              #   Pass arguments to `get_index` via a request object, either of type
              #   {::Google::Cloud::Datastore::Admin::V1::GetIndexRequest} or an equivalent Hash.
              #
              #   @param request [::Google::Cloud::Datastore::Admin::V1::GetIndexRequest, ::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.
              #   @param options [::Gapic::CallOptions, ::Hash]
              #     Overrides the default settings for this call, e.g, timeout, retries, etc. Optional.
              #
              # @overload get_index(project_id: nil, index_id: nil)
              #   Pass arguments to `get_index` 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).
              #
              #   @param project_id [::String]
              #     Project ID against which to make the request.
              #   @param index_id [::String]
              #     The resource ID of the index to get.
              #
              # @yield [response, operation] Access the result along with the RPC operation
              # @yieldparam response [::Google::Cloud::Datastore::Admin::V1::Index]
              # @yieldparam operation [::GRPC::ActiveCall::Operation]
              #
              # @return [::Google::Cloud::Datastore::Admin::V1::Index]
              #
              # @raise [::Google::Cloud::Error] if the RPC is aborted.
              #
              def get_index request, options = nil
                raise ::ArgumentError, "request must be provided" if request.nil?

                request = ::Gapic::Protobuf.coerce request, to: ::Google::Cloud::Datastore::Admin::V1::GetIndexRequest

                # 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.get_index.metadata.to_h

                # Set x-goog-api-client and x-goog-user-project 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::Datastore::Admin::V1::VERSION
                metadata[:"x-goog-user-project"] = @quota_project_id if @quota_project_id

                header_params = {
                  "project_id" => request.project_id,
                  "index_id"   => request.index_id
                }
                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.get_index.timeout,
                                       metadata:     metadata,
                                       retry_policy: @config.rpcs.get_index.retry_policy
                options.apply_defaults metadata:     @config.metadata,
                                       retry_policy: @config.retry_policy

                @datastore_admin_stub.call_rpc :get_index, 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

              ##
              # Lists the indexes that match the specified filters.  Datastore uses an
              # eventually consistent query to fetch the list of indexes and may
              # occasionally return stale results.
              #
              # @overload list_indexes(request, options = nil)
              #   Pass arguments to `list_indexes` via a request object, either of type
              #   {::Google::Cloud::Datastore::Admin::V1::ListIndexesRequest} or an equivalent Hash.
              #
              #   @param request [::Google::Cloud::Datastore::Admin::V1::ListIndexesRequest, ::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.
              #   @param options [::Gapic::CallOptions, ::Hash]
              #     Overrides the default settings for this call, e.g, timeout, retries, etc. Optional.
              #
              # @overload list_indexes(project_id: nil, filter: nil, page_size: nil, page_token: nil)
              #   Pass arguments to `list_indexes` 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).
              #
              #   @param project_id [::String]
              #     Project ID against which to make the request.
              #   @param filter [::String]
              #   @param page_size [::Integer]
              #     The maximum number of items to return.  If zero, then all results will be
              #     returned.
              #   @param page_token [::String]
              #     The next_page_token value returned from a previous List request, if any.
              #
              # @yield [response, operation] Access the result along with the RPC operation
              # @yieldparam response [::Gapic::PagedEnumerable<::Google::Cloud::Datastore::Admin::V1::Index>]
              # @yieldparam operation [::GRPC::ActiveCall::Operation]
              #
              # @return [::Gapic::PagedEnumerable<::Google::Cloud::Datastore::Admin::V1::Index>]
              #
              # @raise [::Google::Cloud::Error] if the RPC is aborted.
              #
              def list_indexes request, options = nil
                raise ::ArgumentError, "request must be provided" if request.nil?

                request = ::Gapic::Protobuf.coerce request, to: ::Google::Cloud::Datastore::Admin::V1::ListIndexesRequest

                # 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.list_indexes.metadata.to_h

                # Set x-goog-api-client and x-goog-user-project 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::Datastore::Admin::V1::VERSION
                metadata[:"x-goog-user-project"] = @quota_project_id if @quota_project_id

                header_params = {
                  "project_id" => request.project_id
                }
                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.list_indexes.timeout,
                                       metadata:     metadata,
                                       retry_policy: @config.rpcs.list_indexes.retry_policy
                options.apply_defaults metadata:     @config.metadata,
                                       retry_policy: @config.retry_policy

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

              ##
              # Configuration class for the DatastoreAdmin API.
              #
              # This class represents the configuration for DatastoreAdmin,
              # providing control over timeouts, retry behavior, logging, transport
              # parameters, and other low-level controls. Certain parameters can also be
              # applied individually to specific RPCs. See
              # {::Google::Cloud::Datastore::Admin::V1::DatastoreAdmin::Client::Configuration::Rpcs}
              # for a list of RPCs that can be configured independently.
              #
              # Configuration can be applied globally to all clients, or to a single client
              # on construction.
              #
              # # Examples
              #
              # To modify the global config, setting the timeout for export_entities
              # to 20 seconds, and all remaining timeouts to 10 seconds:
              #
              #     ::Google::Cloud::Datastore::Admin::V1::DatastoreAdmin::Client.configure do |config|
              #       config.timeout = 10.0
              #       config.rpcs.export_entities.timeout = 20.0
              #     end
              #
              # To apply the above configuration only to a new client:
              #
              #     client = ::Google::Cloud::Datastore::Admin::V1::DatastoreAdmin::Client.new do |config|
              #       config.timeout = 10.0
              #       config.rpcs.export_entities.timeout = 20.0
              #     end
              #
              # @!attribute [rw] endpoint
              #   The hostname or hostname:port of the service endpoint.
              #   Defaults to `"datastore.googleapis.com"`.
              #   @return [::String]
              # @!attribute [rw] credentials
              #   Credentials to send with calls. You may provide any of the following types:
              #    *  (`String`) The path to a service account key file in JSON format
              #    *  (`Hash`) A service account key as a Hash
              #    *  (`Google::Auth::Credentials`) A googleauth credentials object
              #       (see the [googleauth docs](https://googleapis.dev/ruby/googleauth/latest/index.html))
              #    *  (`Signet::OAuth2::Client`) A signet oauth2 client object
              #       (see the [signet docs](https://googleapis.dev/ruby/signet/latest/Signet/OAuth2/Client.html))
              #    *  (`GRPC::Core::Channel`) a gRPC channel with included credentials
              #    *  (`GRPC::Core::ChannelCredentials`) a gRPC credentails object
              #    *  (`nil`) indicating no credentials
              #   @return [::Object]
              # @!attribute [rw] scope
              #   The OAuth scopes
              #   @return [::Array<::String>]
              # @!attribute [rw] lib_name
              #   The library name as recorded in instrumentation and logging
              #   @return [::String]
              # @!attribute [rw] lib_version
              #   The library version as recorded in instrumentation and logging
              #   @return [::String]
              # @!attribute [rw] channel_args
              #   Extra parameters passed to the gRPC channel. Note: this is ignored if a
              #   `GRPC::Core::Channel` object is provided as the credential.
              #   @return [::Hash]
              # @!attribute [rw] interceptors
              #   An array of interceptors that are run before calls are executed.
              #   @return [::Array<::GRPC::ClientInterceptor>]
              # @!attribute [rw] timeout
              #   The call timeout in seconds.
              #   @return [::Numeric]
              # @!attribute [rw] metadata
              #   Additional gRPC headers to be sent with the call.
              #   @return [::Hash{::Symbol=>::String}]
              # @!attribute [rw] retry_policy
              #   The retry policy. The value is a hash with the following keys:
              #    *  `:initial_delay` (*type:* `Numeric`) - The initial delay in seconds.
              #    *  `:max_delay` (*type:* `Numeric`) - The max delay in seconds.
              #    *  `:multiplier` (*type:* `Numeric`) - The incremental backoff multiplier.
              #    *  `:retry_codes` (*type:* `Array<String>`) - The error codes that should
              #       trigger a retry.
              #   @return [::Hash]
              # @!attribute [rw] quota_project
              #   A separate project against which to charge quota.
              #   @return [::String]
              #
              class Configuration
                extend ::Gapic::Config

                config_attr :endpoint,      "datastore.googleapis.com", ::String
                config_attr :credentials,   nil do |value|
                  allowed = [::String, ::Hash, ::Proc, ::Symbol, ::Google::Auth::Credentials, ::Signet::OAuth2::Client, nil]
                  allowed += [::GRPC::Core::Channel, ::GRPC::Core::ChannelCredentials] if defined? ::GRPC
                  allowed.any? { |klass| klass === value }
                end
                config_attr :scope,         nil, ::String, ::Array, nil
                config_attr :lib_name,      nil, ::String, nil
                config_attr :lib_version,   nil, ::String, nil
                config_attr(:channel_args,  { "grpc.service_config_disable_resolution"=>1 }, ::Hash, nil)
                config_attr :interceptors,  nil, ::Array, nil
                config_attr :timeout,       nil, ::Numeric, nil
                config_attr :metadata,      nil, ::Hash, nil
                config_attr :retry_policy,  nil, ::Hash, ::Proc, nil
                config_attr :quota_project, nil, ::String, nil

                # @private
                def initialize parent_config = nil
                  @parent_config = parent_config unless parent_config.nil?

                  yield self if block_given?
                end

                ##
                # Configurations for individual RPCs
                # @return [Rpcs]
                #
                def rpcs
                  @rpcs ||= begin
                    parent_rpcs = nil
                    parent_rpcs = @parent_config.rpcs if defined?(@parent_config) && @parent_config&.respond_to?(:rpcs)
                    Rpcs.new parent_rpcs
                  end
                end

                ##
                # Configuration RPC class for the DatastoreAdmin API.
                #
                # Includes fields providing the configuration for each RPC in this service.
                # Each configuration object is of type `Gapic::Config::Method` and includes
                # the following configuration fields:
                #
                #  *  `timeout` (*type:* `Numeric`) - The call timeout in seconds
                #  *  `metadata` (*type:* `Hash{Symbol=>String}`) - Additional gRPC headers
                #  *  `retry_policy (*type:* `Hash`) - The retry policy. The policy fields
                #     include the following keys:
                #      *  `:initial_delay` (*type:* `Numeric`) - The initial delay in seconds.
                #      *  `:max_delay` (*type:* `Numeric`) - The max delay in seconds.
                #      *  `:multiplier` (*type:* `Numeric`) - The incremental backoff multiplier.
                #      *  `:retry_codes` (*type:* `Array<String>`) - The error codes that should
                #         trigger a retry.
                #
                class Rpcs
                  ##
                  # RPC-specific configuration for `export_entities`
                  # @return [::Gapic::Config::Method]
                  #
                  attr_reader :export_entities
                  ##
                  # RPC-specific configuration for `import_entities`
                  # @return [::Gapic::Config::Method]
                  #
                  attr_reader :import_entities
                  ##
                  # RPC-specific configuration for `get_index`
                  # @return [::Gapic::Config::Method]
                  #
                  attr_reader :get_index
                  ##
                  # RPC-specific configuration for `list_indexes`
                  # @return [::Gapic::Config::Method]
                  #
                  attr_reader :list_indexes

                  # @private
                  def initialize parent_rpcs = nil
                    export_entities_config = parent_rpcs&.export_entities if parent_rpcs&.respond_to? :export_entities
                    @export_entities = ::Gapic::Config::Method.new export_entities_config
                    import_entities_config = parent_rpcs&.import_entities if parent_rpcs&.respond_to? :import_entities
                    @import_entities = ::Gapic::Config::Method.new import_entities_config
                    get_index_config = parent_rpcs&.get_index if parent_rpcs&.respond_to? :get_index
                    @get_index = ::Gapic::Config::Method.new get_index_config
                    list_indexes_config = parent_rpcs&.list_indexes if parent_rpcs&.respond_to? :list_indexes
                    @list_indexes = ::Gapic::Config::Method.new list_indexes_config

                    yield self if block_given?
                  end
                end
              end
            end
          end
        end
      end
    end
  end
end