recommendationengine/apiv1beta1/prediction_client.go - gocloud - Git at Google

 // Copyright 2022 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.

 // Code generated by protoc-gen-go_gapic. DO NOT EDIT.

 package recommendationengine

 import (
 	"bytes"
 	"context"
 	"fmt"
 	"io/ioutil"
 	"math"
 	"net/http"
 	"net/url"
 	"time"

 	recommendationenginepb "cloud.google.com/go/recommendationengine/apiv1beta1/recommendationenginepb"
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/googleapi"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
 	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	httptransport "google.golang.org/api/transport/http"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/protobuf/encoding/protojson"
 	"google.golang.org/protobuf/proto"
 )

 var newPredictionClientHook clientHook

 // PredictionCallOptions contains the retry settings for each method of PredictionClient.
 type PredictionCallOptions struct {
 	Predict []gax.CallOption
 }

 func defaultPredictionGRPCClientOptions() []option.ClientOption {
 	return []option.ClientOption{
 		internaloption.WithDefaultEndpoint("recommendationengine.googleapis.com:443"),
 		internaloption.WithDefaultMTLSEndpoint("recommendationengine.mtls.googleapis.com:443"),
 		internaloption.WithDefaultAudience("https://recommendationengine.googleapis.com/"),
 		internaloption.WithDefaultScopes(DefaultAuthScopes()...),
 		internaloption.EnableJwtWithScope(),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
 			grpc.MaxCallRecvMsgSize(math.MaxInt32))),
 	}
 }

 func defaultPredictionCallOptions() *PredictionCallOptions {
 	return &PredictionCallOptions{
 		Predict: []gax.CallOption{
 			gax.WithRetry(func() gax.Retryer {
 				return gax.OnCodes([]codes.Code{
 					codes.Unavailable,
 					codes.DeadlineExceeded,
 				}, gax.Backoff{
 					Initial:    100 * time.Millisecond,
 					Max:        60000 * time.Millisecond,
 					Multiplier: 1.30,
 				})
 			}),
 		},
 	}
 }

 func defaultPredictionRESTCallOptions() *PredictionCallOptions {
 	return &PredictionCallOptions{
 		Predict: []gax.CallOption{
 			gax.WithRetry(func() gax.Retryer {
 				return gax.OnHTTPCodes(gax.Backoff{
 					Initial:    100 * time.Millisecond,
 					Max:        60000 * time.Millisecond,
 					Multiplier: 1.30,
 				},
 					http.StatusServiceUnavailable,
 					http.StatusGatewayTimeout)
 			}),
 		},
 	}
 }

 // internalPredictionClient is an interface that defines the methods available from Recommendations AI.
 type internalPredictionClient interface {
 	Close() error
 	setGoogleClientInfo(...string)
 	Connection() *grpc.ClientConn
 	Predict(context.Context, *recommendationenginepb.PredictRequest, ...gax.CallOption) *PredictResponse_PredictionResultIterator
 }

 // PredictionClient is a client for interacting with Recommendations AI.
 // Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
 //
 // Service for making recommendation prediction.
 type PredictionClient struct {
 	// The internal transport-dependent client.
 	internalClient internalPredictionClient

 	// The call options for this service.
 	CallOptions *PredictionCallOptions
 }

 // Wrapper methods routed to the internal client.

 // Close closes the connection to the API service. The user should invoke this when
 // the client is no longer required.
 func (c *PredictionClient) Close() error {
 	return c.internalClient.Close()
 }

 // setGoogleClientInfo sets the name and version of the application in
 // the `x-goog-api-client` header passed on each request. Intended for
 // use by Google-written clients.
 func (c *PredictionClient) setGoogleClientInfo(keyval ...string) {
 	c.internalClient.setGoogleClientInfo(keyval...)
 }

 // Connection returns a connection to the API service.
 //
 // Deprecated: Connections are now pooled so this method does not always
 // return the same resource.
 func (c *PredictionClient) Connection() *grpc.ClientConn {
 	return c.internalClient.Connection()
 }

 // Predict makes a recommendation prediction. If using API Key based authentication,
 // the API Key must be registered using the
 // PredictionApiKeyRegistry
 // service. Learn more (at /recommendations-ai/docs/setting-up#register-key).
 func (c *PredictionClient) Predict(ctx context.Context, req *recommendationenginepb.PredictRequest, opts ...gax.CallOption) *PredictResponse_PredictionResultIterator {
 	return c.internalClient.Predict(ctx, req, opts...)
 }

 // predictionGRPCClient is a client for interacting with Recommendations AI over gRPC transport.
 //
 // Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
 type predictionGRPCClient struct {
 	// Connection pool of gRPC connections to the service.
 	connPool gtransport.ConnPool

 	// flag to opt out of default deadlines via GOOGLE_API_GO_EXPERIMENTAL_DISABLE_DEFAULT_DEADLINE
 	disableDeadlines bool

 	// Points back to the CallOptions field of the containing PredictionClient
 	CallOptions **PredictionCallOptions

 	// The gRPC API client.
 	predictionClient recommendationenginepb.PredictionServiceClient

 	// The x-goog-* metadata to be sent with each request.
 	xGoogMetadata metadata.MD
 }

 // NewPredictionClient creates a new prediction service client based on gRPC.
 // The returned client must be Closed when it is done being used to clean up its underlying connections.
 //
 // Service for making recommendation prediction.
 func NewPredictionClient(ctx context.Context, opts ...option.ClientOption) (*PredictionClient, error) {
 	clientOpts := defaultPredictionGRPCClientOptions()
 	if newPredictionClientHook != nil {
 		hookOpts, err := newPredictionClientHook(ctx, clientHookParams{})
 		if err != nil {
 			return nil, err
 		}
 		clientOpts = append(clientOpts, hookOpts...)
 	}

 	disableDeadlines, err := checkDisableDeadlines()
 	if err != nil {
 		return nil, err
 	}

 	connPool, err := gtransport.DialPool(ctx, append(clientOpts, opts...)...)
 	if err != nil {
 		return nil, err
 	}
 	client := PredictionClient{CallOptions: defaultPredictionCallOptions()}

 	c := &predictionGRPCClient{
 		connPool:         connPool,
 		disableDeadlines: disableDeadlines,
 		predictionClient: recommendationenginepb.NewPredictionServiceClient(connPool),
 		CallOptions:      &client.CallOptions,
 	}
 	c.setGoogleClientInfo()

 	client.internalClient = c

 	return &client, nil
 }

 // Connection returns a connection to the API service.
 //
 // Deprecated: Connections are now pooled so this method does not always
 // return the same resource.
 func (c *predictionGRPCClient) Connection() *grpc.ClientConn {
 	return c.connPool.Conn()
 }

 // setGoogleClientInfo sets the name and version of the application in
 // the `x-goog-api-client` header passed on each request. Intended for
 // use by Google-written clients.
 func (c *predictionGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
 	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }

 // Close closes the connection to the API service. The user should invoke this when
 // the client is no longer required.
 func (c *predictionGRPCClient) Close() error {
 	return c.connPool.Close()
 }

 // Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
 type predictionRESTClient struct {
 	// The http endpoint to connect to.
 	endpoint string

 	// The http client.
 	httpClient *http.Client

 	// The x-goog-* metadata to be sent with each request.
 	xGoogMetadata metadata.MD

 	// Points back to the CallOptions field of the containing PredictionClient
 	CallOptions **PredictionCallOptions
 }

 // NewPredictionRESTClient creates a new prediction service rest client.
 //
 // Service for making recommendation prediction.
 func NewPredictionRESTClient(ctx context.Context, opts ...option.ClientOption) (*PredictionClient, error) {
 	clientOpts := append(defaultPredictionRESTClientOptions(), opts...)
 	httpClient, endpoint, err := httptransport.NewClient(ctx, clientOpts...)
 	if err != nil {
 		return nil, err
 	}

 	callOpts := defaultPredictionRESTCallOptions()
 	c := &predictionRESTClient{
 		endpoint:    endpoint,
 		httpClient:  httpClient,
 		CallOptions: &callOpts,
 	}
 	c.setGoogleClientInfo()

 	return &PredictionClient{internalClient: c, CallOptions: callOpts}, nil
 }

 func defaultPredictionRESTClientOptions() []option.ClientOption {
 	return []option.ClientOption{
 		internaloption.WithDefaultEndpoint("https://recommendationengine.googleapis.com"),
 		internaloption.WithDefaultMTLSEndpoint("https://recommendationengine.mtls.googleapis.com"),
 		internaloption.WithDefaultAudience("https://recommendationengine.googleapis.com/"),
 		internaloption.WithDefaultScopes(DefaultAuthScopes()...),
 	}
 }

 // setGoogleClientInfo sets the name and version of the application in
 // the `x-goog-api-client` header passed on each request. Intended for
 // use by Google-written clients.
 func (c *predictionRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
 	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }

 // Close closes the connection to the API service. The user should invoke this when
 // the client is no longer required.
 func (c *predictionRESTClient) Close() error {
 	// Replace httpClient with nil to force cleanup.
 	c.httpClient = nil
 	return nil
 }

 // Connection returns a connection to the API service.
 //
 // Deprecated: This method always returns nil.
 func (c *predictionRESTClient) Connection() *grpc.ClientConn {
 	return nil
 }
 func (c *predictionGRPCClient) Predict(ctx context.Context, req *recommendationenginepb.PredictRequest, opts ...gax.CallOption) *PredictResponse_PredictionResultIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))

 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Predict[0:len((*c.CallOptions).Predict):len((*c.CallOptions).Predict)], opts...)
 	it := &PredictResponse_PredictionResultIterator{}
 	req = proto.Clone(req).(*recommendationenginepb.PredictRequest)
 	it.InternalFetch = func(pageSize int, pageToken string) ([]*recommendationenginepb.PredictResponse_PredictionResult, string, error) {
 		resp := &recommendationenginepb.PredictResponse{}
 		if pageToken != "" {
 			req.PageToken = pageToken
 		}
 		if pageSize > math.MaxInt32 {
 			req.PageSize = math.MaxInt32
 		} else if pageSize != 0 {
 			req.PageSize = int32(pageSize)
 		}
 		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 			var err error
 			resp, err = c.predictionClient.Predict(ctx, req, settings.GRPC...)
 			return err
 		}, opts...)
 		if err != nil {
 			return nil, "", err
 		}

 		it.Response = resp
 		return resp.GetResults(), resp.GetNextPageToken(), nil
 	}
 	fetch := func(pageSize int, pageToken string) (string, error) {
 		items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
 		if err != nil {
 			return "", err
 		}
 		it.items = append(it.items, items...)
 		return nextPageToken, nil
 	}

 	it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
 	it.pageInfo.MaxSize = int(req.GetPageSize())
 	it.pageInfo.Token = req.GetPageToken()

 	return it
 }

 // Predict makes a recommendation prediction. If using API Key based authentication,
 // the API Key must be registered using the
 // PredictionApiKeyRegistry
 // service. Learn more (at /recommendations-ai/docs/setting-up#register-key).
 func (c *predictionRESTClient) Predict(ctx context.Context, req *recommendationenginepb.PredictRequest, opts ...gax.CallOption) *PredictResponse_PredictionResultIterator {
 	it := &PredictResponse_PredictionResultIterator{}
 	req = proto.Clone(req).(*recommendationenginepb.PredictRequest)
 	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
 	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
 	it.InternalFetch = func(pageSize int, pageToken string) ([]*recommendationenginepb.PredictResponse_PredictionResult, string, error) {
 		resp := &recommendationenginepb.PredictResponse{}
 		if pageToken != "" {
 			req.PageToken = pageToken
 		}
 		if pageSize > math.MaxInt32 {
 			req.PageSize = math.MaxInt32
 		} else if pageSize != 0 {
 			req.PageSize = int32(pageSize)
 		}
 		jsonReq, err := m.Marshal(req)
 		if err != nil {
 			return nil, "", err
 		}

 		baseUrl, err := url.Parse(c.endpoint)
 		if err != nil {
 			return nil, "", err
 		}
 		baseUrl.Path += fmt.Sprintf("/v1beta1/%v:predict", req.GetName())

 		// Build HTTP headers from client and context metadata.
 		headers := buildHeaders(ctx, c.xGoogMetadata, metadata.Pairs("Content-Type", "application/json"))
 		e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 			if settings.Path != "" {
 				baseUrl.Path = settings.Path
 			}
 			httpReq, err := http.NewRequest("POST", baseUrl.String(), bytes.NewReader(jsonReq))
 			if err != nil {
 				return err
 			}
 			httpReq.Header = headers

 			httpRsp, err := c.httpClient.Do(httpReq)
 			if err != nil {
 				return err
 			}
 			defer httpRsp.Body.Close()

 			if err = googleapi.CheckResponse(httpRsp); err != nil {
 				return err
 			}

 			buf, err := ioutil.ReadAll(httpRsp.Body)
 			if err != nil {
 				return err
 			}

 			if err := unm.Unmarshal(buf, resp); err != nil {
 				return maybeUnknownEnum(err)
 			}

 			return nil
 		}, opts...)
 		if e != nil {
 			return nil, "", e
 		}
 		it.Response = resp
 		return resp.GetResults(), resp.GetNextPageToken(), nil
 	}

 	fetch := func(pageSize int, pageToken string) (string, error) {
 		items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
 		if err != nil {
 			return "", err
 		}
 		it.items = append(it.items, items...)
 		return nextPageToken, nil
 	}

 	it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
 	it.pageInfo.MaxSize = int(req.GetPageSize())
 	it.pageInfo.Token = req.GetPageToken()

 	return it
 }

 // PredictResponse_PredictionResultIterator manages a stream of *recommendationenginepb.PredictResponse_PredictionResult.
 type PredictResponse_PredictionResultIterator struct {
 	items    []*recommendationenginepb.PredictResponse_PredictionResult
 	pageInfo *iterator.PageInfo
 	nextFunc func() error

 	// Response is the raw response for the current page.
 	// It must be cast to the RPC response type.
 	// Calling Next() or InternalFetch() updates this value.
 	Response interface{}

 	// InternalFetch is for use by the Google Cloud Libraries only.
 	// It is not part of the stable interface of this package.
 	//
 	// InternalFetch returns results from a single call to the underlying RPC.
 	// The number of results is no greater than pageSize.
 	// If there are no more results, nextPageToken is empty and err is nil.
 	InternalFetch func(pageSize int, pageToken string) (results []*recommendationenginepb.PredictResponse_PredictionResult, nextPageToken string, err error)
 }

 // PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
 func (it *PredictResponse_PredictionResultIterator) PageInfo() *iterator.PageInfo {
 	return it.pageInfo
 }

 // Next returns the next result. Its second return value is iterator.Done if there are no more
 // results. Once Next returns Done, all subsequent calls will return Done.
 func (it *PredictResponse_PredictionResultIterator) Next() (*recommendationenginepb.PredictResponse_PredictionResult, error) {
 	var item *recommendationenginepb.PredictResponse_PredictionResult
 	if err := it.nextFunc(); err != nil {
 		return item, err
 	}
 	item = it.items[0]
 	it.items = it.items[1:]
 	return item, nil
 }

 func (it *PredictResponse_PredictionResultIterator) bufLen() int {
 	return len(it.items)
 }

 func (it *PredictResponse_PredictionResultIterator) takeBuf() interface{} {
 	b := it.items
 	it.items = nil
 	return b
 }
	// Copyright 2022 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.

	// Code generated by protoc-gen-go_gapic. DO NOT EDIT.

	package recommendationengine

	import (
	"bytes"
	"context"
	"fmt"
	"io/ioutil"
	"math"
	"net/http"
	"net/url"
	"time"

	recommendationenginepb "cloud.google.com/go/recommendationengine/apiv1beta1/recommendationenginepb"
	gax "github.com/googleapis/gax-go/v2"
	"google.golang.org/api/googleapi"
	"google.golang.org/api/iterator"
	"google.golang.org/api/option"
	"google.golang.org/api/option/internaloption"
	gtransport "google.golang.org/api/transport/grpc"
	httptransport "google.golang.org/api/transport/http"
	"google.golang.org/grpc"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/metadata"
	"google.golang.org/protobuf/encoding/protojson"
	"google.golang.org/protobuf/proto"
	)

	var newPredictionClientHook clientHook

	// PredictionCallOptions contains the retry settings for each method of PredictionClient.
	type PredictionCallOptions struct {
	Predict []gax.CallOption
	}

	func defaultPredictionGRPCClientOptions() []option.ClientOption {
	return []option.ClientOption{
	internaloption.WithDefaultEndpoint("recommendationengine.googleapis.com:443"),
	internaloption.WithDefaultMTLSEndpoint("recommendationengine.mtls.googleapis.com:443"),
	internaloption.WithDefaultAudience("https://recommendationengine.googleapis.com/"),
	internaloption.WithDefaultScopes(DefaultAuthScopes()...),
	internaloption.EnableJwtWithScope(),
	option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
	grpc.MaxCallRecvMsgSize(math.MaxInt32))),
	}
	}

	func defaultPredictionCallOptions() *PredictionCallOptions {
	return &PredictionCallOptions{
	Predict: []gax.CallOption{
	gax.WithRetry(func() gax.Retryer {
	return gax.OnCodes([]codes.Code{
	codes.Unavailable,
	codes.DeadlineExceeded,
	}, gax.Backoff{
	Initial: 100 * time.Millisecond,
	Max: 60000 * time.Millisecond,
	Multiplier: 1.30,
	})
	}),
	},
	}
	}

	func defaultPredictionRESTCallOptions() *PredictionCallOptions {
	return &PredictionCallOptions{
	Predict: []gax.CallOption{
	gax.WithRetry(func() gax.Retryer {
	return gax.OnHTTPCodes(gax.Backoff{
	Initial: 100 * time.Millisecond,
	Max: 60000 * time.Millisecond,
	Multiplier: 1.30,
	},
	http.StatusServiceUnavailable,
	http.StatusGatewayTimeout)
	}),
	},
	}
	}

	// internalPredictionClient is an interface that defines the methods available from Recommendations AI.
	type internalPredictionClient interface {
	Close() error
	setGoogleClientInfo(...string)
	Connection() *grpc.ClientConn
	Predict(context.Context, recommendationenginepb.PredictRequest, ...gax.CallOption) PredictResponse_PredictionResultIterator
	}

	// PredictionClient is a client for interacting with Recommendations AI.
	// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
	//
	// Service for making recommendation prediction.
	type PredictionClient struct {
	// The internal transport-dependent client.
	internalClient internalPredictionClient

	// The call options for this service.
	CallOptions *PredictionCallOptions
	}

	// Wrapper methods routed to the internal client.

	// Close closes the connection to the API service. The user should invoke this when
	// the client is no longer required.
	func (c *PredictionClient) Close() error {
	return c.internalClient.Close()
	}

	// setGoogleClientInfo sets the name and version of the application in
	// the `x-goog-api-client` header passed on each request. Intended for
	// use by Google-written clients.
	func (c *PredictionClient) setGoogleClientInfo(keyval ...string) {
	c.internalClient.setGoogleClientInfo(keyval...)
	}

	// Connection returns a connection to the API service.
	//
	// Deprecated: Connections are now pooled so this method does not always
	// return the same resource.
	func (c PredictionClient) Connection() grpc.ClientConn {
	return c.internalClient.Connection()
	}

	// Predict makes a recommendation prediction. If using API Key based authentication,
	// the API Key must be registered using the
	// PredictionApiKeyRegistry
	// service. Learn more (at /recommendations-ai/docs/setting-up#register-key).
	func (c PredictionClient) Predict(ctx context.Context, req recommendationenginepb.PredictRequest, opts ...gax.CallOption) *PredictResponse_PredictionResultIterator {
	return c.internalClient.Predict(ctx, req, opts...)
	}

	// predictionGRPCClient is a client for interacting with Recommendations AI over gRPC transport.
	//
	// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
	type predictionGRPCClient struct {
	// Connection pool of gRPC connections to the service.
	connPool gtransport.ConnPool

	// flag to opt out of default deadlines via GOOGLE_API_GO_EXPERIMENTAL_DISABLE_DEFAULT_DEADLINE
	disableDeadlines bool

	// Points back to the CallOptions field of the containing PredictionClient
	CallOptions **PredictionCallOptions

	// The gRPC API client.
	predictionClient recommendationenginepb.PredictionServiceClient

	// The x-goog-* metadata to be sent with each request.
	xGoogMetadata metadata.MD
	}

	// NewPredictionClient creates a new prediction service client based on gRPC.
	// The returned client must be Closed when it is done being used to clean up its underlying connections.
	//
	// Service for making recommendation prediction.
	func NewPredictionClient(ctx context.Context, opts ...option.ClientOption) (*PredictionClient, error) {
	clientOpts := defaultPredictionGRPCClientOptions()
	if newPredictionClientHook != nil {
	hookOpts, err := newPredictionClientHook(ctx, clientHookParams{})
	if err != nil {
	return nil, err
	}
	clientOpts = append(clientOpts, hookOpts...)
	}

	disableDeadlines, err := checkDisableDeadlines()
	if err != nil {
	return nil, err
	}

	connPool, err := gtransport.DialPool(ctx, append(clientOpts, opts...)...)
	if err != nil {
	return nil, err
	}
	client := PredictionClient{CallOptions: defaultPredictionCallOptions()}

	c := &predictionGRPCClient{
	connPool: connPool,
	disableDeadlines: disableDeadlines,
	predictionClient: recommendationenginepb.NewPredictionServiceClient(connPool),
	CallOptions: &client.CallOptions,
	}
	c.setGoogleClientInfo()

	client.internalClient = c

	return &client, nil
	}

	// Connection returns a connection to the API service.
	//
	// Deprecated: Connections are now pooled so this method does not always
	// return the same resource.
	func (c predictionGRPCClient) Connection() grpc.ClientConn {
	return c.connPool.Conn()
	}

	// setGoogleClientInfo sets the name and version of the application in
	// the `x-goog-api-client` header passed on each request. Intended for
	// use by Google-written clients.
	func (c *predictionGRPCClient) setGoogleClientInfo(keyval ...string) {
	kv := append([]string{"gl-go", versionGo()}, keyval...)
	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
	}

	// Close closes the connection to the API service. The user should invoke this when
	// the client is no longer required.
	func (c *predictionGRPCClient) Close() error {
	return c.connPool.Close()
	}

	// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
	type predictionRESTClient struct {
	// The http endpoint to connect to.
	endpoint string

	// The http client.
	httpClient *http.Client

	// The x-goog-* metadata to be sent with each request.
	xGoogMetadata metadata.MD

	// Points back to the CallOptions field of the containing PredictionClient
	CallOptions **PredictionCallOptions
	}

	// NewPredictionRESTClient creates a new prediction service rest client.
	//
	// Service for making recommendation prediction.
	func NewPredictionRESTClient(ctx context.Context, opts ...option.ClientOption) (*PredictionClient, error) {
	clientOpts := append(defaultPredictionRESTClientOptions(), opts...)
	httpClient, endpoint, err := httptransport.NewClient(ctx, clientOpts...)
	if err != nil {
	return nil, err
	}

	callOpts := defaultPredictionRESTCallOptions()
	c := &predictionRESTClient{
	endpoint: endpoint,
	httpClient: httpClient,
	CallOptions: &callOpts,
	}
	c.setGoogleClientInfo()

	return &PredictionClient{internalClient: c, CallOptions: callOpts}, nil
	}

	func defaultPredictionRESTClientOptions() []option.ClientOption {
	return []option.ClientOption{
	internaloption.WithDefaultEndpoint("https://recommendationengine.googleapis.com"),
	internaloption.WithDefaultMTLSEndpoint("https://recommendationengine.mtls.googleapis.com"),
	internaloption.WithDefaultAudience("https://recommendationengine.googleapis.com/"),
	internaloption.WithDefaultScopes(DefaultAuthScopes()...),
	}
	}

	// setGoogleClientInfo sets the name and version of the application in
	// the `x-goog-api-client` header passed on each request. Intended for
	// use by Google-written clients.
	func (c *predictionRESTClient) setGoogleClientInfo(keyval ...string) {
	kv := append([]string{"gl-go", versionGo()}, keyval...)
	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
	}

	// Close closes the connection to the API service. The user should invoke this when
	// the client is no longer required.
	func (c *predictionRESTClient) Close() error {
	// Replace httpClient with nil to force cleanup.
	c.httpClient = nil
	return nil
	}

	// Connection returns a connection to the API service.
	//
	// Deprecated: This method always returns nil.
	func (c predictionRESTClient) Connection() grpc.ClientConn {
	return nil
	}
	func (c predictionGRPCClient) Predict(ctx context.Context, req recommendationenginepb.PredictRequest, opts ...gax.CallOption) *PredictResponse_PredictionResultIterator {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((c.CallOptions).Predict[0:len((c.CallOptions).Predict):len((*c.CallOptions).Predict)], opts...)
	it := &PredictResponse_PredictionResultIterator{}
	req = proto.Clone(req).(*recommendationenginepb.PredictRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*recommendationenginepb.PredictResponse_PredictionResult, string, error) {
	resp := &recommendationenginepb.PredictResponse{}
	if pageToken != "" {
	req.PageToken = pageToken
	}
	if pageSize > math.MaxInt32 {
	req.PageSize = math.MaxInt32
	} else if pageSize != 0 {
	req.PageSize = int32(pageSize)
	}
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	resp, err = c.predictionClient.Predict(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, "", err
	}

	it.Response = resp
	return resp.GetResults(), resp.GetNextPageToken(), nil
	}
	fetch := func(pageSize int, pageToken string) (string, error) {
	items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
	if err != nil {
	return "", err
	}
	it.items = append(it.items, items...)
	return nextPageToken, nil
	}

	it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
	it.pageInfo.MaxSize = int(req.GetPageSize())
	it.pageInfo.Token = req.GetPageToken()

	return it
	}

	// Predict makes a recommendation prediction. If using API Key based authentication,
	// the API Key must be registered using the
	// PredictionApiKeyRegistry
	// service. Learn more (at /recommendations-ai/docs/setting-up#register-key).
	func (c predictionRESTClient) Predict(ctx context.Context, req recommendationenginepb.PredictRequest, opts ...gax.CallOption) *PredictResponse_PredictionResultIterator {
	it := &PredictResponse_PredictionResultIterator{}
	req = proto.Clone(req).(*recommendationenginepb.PredictRequest)
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	it.InternalFetch = func(pageSize int, pageToken string) ([]*recommendationenginepb.PredictResponse_PredictionResult, string, error) {
	resp := &recommendationenginepb.PredictResponse{}
	if pageToken != "" {
	req.PageToken = pageToken
	}
	if pageSize > math.MaxInt32 {
	req.PageSize = math.MaxInt32
	} else if pageSize != 0 {
	req.PageSize = int32(pageSize)
	}
	jsonReq, err := m.Marshal(req)
	if err != nil {
	return nil, "", err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
	return nil, "", err
	}
	baseUrl.Path += fmt.Sprintf("/v1beta1/%v:predict", req.GetName())

	// Build HTTP headers from client and context metadata.
	headers := buildHeaders(ctx, c.xGoogMetadata, metadata.Pairs("Content-Type", "application/json"))
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	if settings.Path != "" {
	baseUrl.Path = settings.Path
	}
	httpReq, err := http.NewRequest("POST", baseUrl.String(), bytes.NewReader(jsonReq))
	if err != nil {
	return err
	}
	httpReq.Header = headers

	httpRsp, err := c.httpClient.Do(httpReq)
	if err != nil {
	return err
	}
	defer httpRsp.Body.Close()

	if err = googleapi.CheckResponse(httpRsp); err != nil {
	return err
	}

	buf, err := ioutil.ReadAll(httpRsp.Body)
	if err != nil {
	return err
	}

	if err := unm.Unmarshal(buf, resp); err != nil {
	return maybeUnknownEnum(err)
	}

	return nil
	}, opts...)
	if e != nil {
	return nil, "", e
	}
	it.Response = resp
	return resp.GetResults(), resp.GetNextPageToken(), nil
	}

	fetch := func(pageSize int, pageToken string) (string, error) {
	items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
	if err != nil {
	return "", err
	}
	it.items = append(it.items, items...)
	return nextPageToken, nil
	}

	it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
	it.pageInfo.MaxSize = int(req.GetPageSize())
	it.pageInfo.Token = req.GetPageToken()

	return it
	}

	// PredictResponse_PredictionResultIterator manages a stream of *recommendationenginepb.PredictResponse_PredictionResult.
	type PredictResponse_PredictionResultIterator struct {
	items []*recommendationenginepb.PredictResponse_PredictionResult
	pageInfo *iterator.PageInfo
	nextFunc func() error

	// Response is the raw response for the current page.
	// It must be cast to the RPC response type.
	// Calling Next() or InternalFetch() updates this value.
	Response interface{}

	// InternalFetch is for use by the Google Cloud Libraries only.
	// It is not part of the stable interface of this package.
	//
	// InternalFetch returns results from a single call to the underlying RPC.
	// The number of results is no greater than pageSize.
	// If there are no more results, nextPageToken is empty and err is nil.
	InternalFetch func(pageSize int, pageToken string) (results []*recommendationenginepb.PredictResponse_PredictionResult, nextPageToken string, err error)
	}

	// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
	func (it PredictResponse_PredictionResultIterator) PageInfo() iterator.PageInfo {
	return it.pageInfo
	}

	// Next returns the next result. Its second return value is iterator.Done if there are no more
	// results. Once Next returns Done, all subsequent calls will return Done.
	func (it PredictResponse_PredictionResultIterator) Next() (recommendationenginepb.PredictResponse_PredictionResult, error) {
	var item *recommendationenginepb.PredictResponse_PredictionResult
	if err := it.nextFunc(); err != nil {
	return item, err
	}
	item = it.items[0]
	it.items = it.items[1:]
	return item, nil
	}

	func (it *PredictResponse_PredictionResultIterator) bufLen() int {
	return len(it.items)
	}

	func (it *PredictResponse_PredictionResultIterator) takeBuf() interface{} {
	b := it.items
	it.items = nil
	return b
	}