appengine/apiv1/services_client.go - gocloud - Git at Google

 // Copyright 2021 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 appengine

 import (
 	"context"
 	"fmt"
 	"math"
 	"net/url"
 	"time"

 	"cloud.google.com/go/longrunning"
 	lroauto "cloud.google.com/go/longrunning/autogen"
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
 	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	appenginepb "google.golang.org/genproto/googleapis/appengine/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/protobuf/proto"
 )

 var newServicesClientHook clientHook

 // ServicesCallOptions contains the retry settings for each method of ServicesClient.
 type ServicesCallOptions struct {
 	ListServices  []gax.CallOption
 	GetService    []gax.CallOption
 	UpdateService []gax.CallOption
 	DeleteService []gax.CallOption
 }

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

 func defaultServicesCallOptions() *ServicesCallOptions {
 	return &ServicesCallOptions{
 		ListServices:  []gax.CallOption{},
 		GetService:    []gax.CallOption{},
 		UpdateService: []gax.CallOption{},
 		DeleteService: []gax.CallOption{},
 	}
 }

 // internalServicesClient is an interface that defines the methods availaible from App Engine Admin API.
 type internalServicesClient interface {
 	Close() error
 	setGoogleClientInfo(...string)
 	Connection() *grpc.ClientConn
 	ListServices(context.Context, *appenginepb.ListServicesRequest, ...gax.CallOption) *ServiceIterator
 	GetService(context.Context, *appenginepb.GetServiceRequest, ...gax.CallOption) (*appenginepb.Service, error)
 	UpdateService(context.Context, *appenginepb.UpdateServiceRequest, ...gax.CallOption) (*UpdateServiceOperation, error)
 	UpdateServiceOperation(name string) *UpdateServiceOperation
 	DeleteService(context.Context, *appenginepb.DeleteServiceRequest, ...gax.CallOption) (*DeleteServiceOperation, error)
 	DeleteServiceOperation(name string) *DeleteServiceOperation
 }

 // ServicesClient is a client for interacting with App Engine Admin API.
 // Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
 //
 // Manages services of an application.
 type ServicesClient struct {
 	// The internal transport-dependent client.
 	internalClient internalServicesClient

 	// The call options for this service.
 	CallOptions *ServicesCallOptions

 	// LROClient is used internally to handle long-running operations.
 	// It is exposed so that its CallOptions can be modified if required.
 	// Users should not Close this client.
 	LROClient *lroauto.OperationsClient
 }

 // 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 *ServicesClient) 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 *ServicesClient) setGoogleClientInfo(keyval ...string) {
 	c.internalClient.setGoogleClientInfo(keyval...)
 }

 // Connection returns a connection to the API service.
 //
 // Deprecated.
 func (c *ServicesClient) Connection() *grpc.ClientConn {
 	return c.internalClient.Connection()
 }

 // ListServices lists all the services in the application.
 func (c *ServicesClient) ListServices(ctx context.Context, req *appenginepb.ListServicesRequest, opts ...gax.CallOption) *ServiceIterator {
 	return c.internalClient.ListServices(ctx, req, opts...)
 }

 // GetService gets the current configuration of the specified service.
 func (c *ServicesClient) GetService(ctx context.Context, req *appenginepb.GetServiceRequest, opts ...gax.CallOption) (*appenginepb.Service, error) {
 	return c.internalClient.GetService(ctx, req, opts...)
 }

 // UpdateService updates the configuration of the specified service.
 func (c *ServicesClient) UpdateService(ctx context.Context, req *appenginepb.UpdateServiceRequest, opts ...gax.CallOption) (*UpdateServiceOperation, error) {
 	return c.internalClient.UpdateService(ctx, req, opts...)
 }

 // UpdateServiceOperation returns a new UpdateServiceOperation from a given name.
 // The name must be that of a previously created UpdateServiceOperation, possibly from a different process.
 func (c *ServicesClient) UpdateServiceOperation(name string) *UpdateServiceOperation {
 	return c.internalClient.UpdateServiceOperation(name)
 }

 // DeleteService deletes the specified service and all enclosed versions.
 func (c *ServicesClient) DeleteService(ctx context.Context, req *appenginepb.DeleteServiceRequest, opts ...gax.CallOption) (*DeleteServiceOperation, error) {
 	return c.internalClient.DeleteService(ctx, req, opts...)
 }

 // DeleteServiceOperation returns a new DeleteServiceOperation from a given name.
 // The name must be that of a previously created DeleteServiceOperation, possibly from a different process.
 func (c *ServicesClient) DeleteServiceOperation(name string) *DeleteServiceOperation {
 	return c.internalClient.DeleteServiceOperation(name)
 }

 // servicesGRPCClient is a client for interacting with App Engine Admin API over gRPC transport.
 //
 // Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
 type servicesGRPCClient 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 ServicesClient
 	CallOptions **ServicesCallOptions

 	// The gRPC API client.
 	servicesClient appenginepb.ServicesClient

 	// LROClient is used internally to handle long-running operations.
 	// It is exposed so that its CallOptions can be modified if required.
 	// Users should not Close this client.
 	LROClient **lroauto.OperationsClient

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

 // NewServicesClient creates a new services client based on gRPC.
 // The returned client must be Closed when it is done being used to clean up its underlying connections.
 //
 // Manages services of an application.
 func NewServicesClient(ctx context.Context, opts ...option.ClientOption) (*ServicesClient, error) {
 	clientOpts := defaultServicesGRPCClientOptions()
 	if newServicesClientHook != nil {
 		hookOpts, err := newServicesClientHook(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 := ServicesClient{CallOptions: defaultServicesCallOptions()}

 	c := &servicesGRPCClient{
 		connPool:         connPool,
 		disableDeadlines: disableDeadlines,
 		servicesClient:   appenginepb.NewServicesClient(connPool),
 		CallOptions:      &client.CallOptions,
 	}
 	c.setGoogleClientInfo()

 	client.internalClient = c

 	client.LROClient, err = lroauto.NewOperationsClient(ctx, gtransport.WithConnPool(connPool))
 	if err != nil {
 		// This error "should not happen", since we are just reusing old connection pool
 		// and never actually need to dial.
 		// If this does happen, we could leak connp. However, we cannot close conn:
 		// If the user invoked the constructor with option.WithGRPCConn,
 		// we would close a connection that's still in use.
 		// TODO: investigate error conditions.
 		return nil, err
 	}
 	c.LROClient = &client.LROClient
 	return &client, nil
 }

 // Connection returns a connection to the API service.
 //
 // Deprecated.
 func (c *servicesGRPCClient) 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 *servicesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
 	kv = append(kv, "gapic", versionClient, "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 *servicesGRPCClient) Close() error {
 	return c.connPool.Close()
 }

 func (c *servicesGRPCClient) ListServices(ctx context.Context, req *appenginepb.ListServicesRequest, opts ...gax.CallOption) *ServiceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListServices[0:len((*c.CallOptions).ListServices):len((*c.CallOptions).ListServices)], opts...)
 	it := &ServiceIterator{}
 	req = proto.Clone(req).(*appenginepb.ListServicesRequest)
 	it.InternalFetch = func(pageSize int, pageToken string) ([]*appenginepb.Service, string, error) {
 		var resp *appenginepb.ListServicesResponse
 		req.PageToken = pageToken
 		if pageSize > math.MaxInt32 {
 			req.PageSize = math.MaxInt32
 		} else {
 			req.PageSize = int32(pageSize)
 		}
 		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 			var err error
 			resp, err = c.servicesClient.ListServices(ctx, req, settings.GRPC...)
 			return err
 		}, opts...)
 		if err != nil {
 			return nil, "", err
 		}

 		it.Response = resp
 		return resp.GetServices(), 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
 }

 func (c *servicesGRPCClient) GetService(ctx context.Context, req *appenginepb.GetServiceRequest, opts ...gax.CallOption) (*appenginepb.Service, error) {
 	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).GetService[0:len((*c.CallOptions).GetService):len((*c.CallOptions).GetService)], opts...)
 	var resp *appenginepb.Service
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 		var err error
 		resp, err = c.servicesClient.GetService(ctx, req, settings.GRPC...)
 		return err
 	}, opts...)
 	if err != nil {
 		return nil, err
 	}
 	return resp, nil
 }

 func (c *servicesGRPCClient) UpdateService(ctx context.Context, req *appenginepb.UpdateServiceRequest, opts ...gax.CallOption) (*UpdateServiceOperation, error) {
 	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).UpdateService[0:len((*c.CallOptions).UpdateService):len((*c.CallOptions).UpdateService)], opts...)
 	var resp *longrunningpb.Operation
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 		var err error
 		resp, err = c.servicesClient.UpdateService(ctx, req, settings.GRPC...)
 		return err
 	}, opts...)
 	if err != nil {
 		return nil, err
 	}
 	return &UpdateServiceOperation{
 		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
 	}, nil
 }

 func (c *servicesGRPCClient) DeleteService(ctx context.Context, req *appenginepb.DeleteServiceRequest, opts ...gax.CallOption) (*DeleteServiceOperation, error) {
 	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).DeleteService[0:len((*c.CallOptions).DeleteService):len((*c.CallOptions).DeleteService)], opts...)
 	var resp *longrunningpb.Operation
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 		var err error
 		resp, err = c.servicesClient.DeleteService(ctx, req, settings.GRPC...)
 		return err
 	}, opts...)
 	if err != nil {
 		return nil, err
 	}
 	return &DeleteServiceOperation{
 		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
 	}, nil
 }

 // DeleteServiceOperation manages a long-running operation from DeleteService.
 type DeleteServiceOperation struct {
 	lro *longrunning.Operation
 }

 // DeleteServiceOperation returns a new DeleteServiceOperation from a given name.
 // The name must be that of a previously created DeleteServiceOperation, possibly from a different process.
 func (c *servicesGRPCClient) DeleteServiceOperation(name string) *DeleteServiceOperation {
 	return &DeleteServiceOperation{
 		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
 	}
 }

 // Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
 //
 // See documentation of Poll for error-handling information.
 func (op *DeleteServiceOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
 	return op.lro.WaitWithInterval(ctx, nil, time.Minute, opts...)
 }

 // Poll fetches the latest state of the long-running operation.
 //
 // Poll also fetches the latest metadata, which can be retrieved by Metadata.
 //
 // If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
 // the operation has completed with failure, the error is returned and op.Done will return true.
 // If Poll succeeds and the operation has completed successfully,
 // op.Done will return true, and the response of the operation is returned.
 // If Poll succeeds and the operation has not completed, the returned response and error are both nil.
 func (op *DeleteServiceOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
 	return op.lro.Poll(ctx, nil, opts...)
 }

 // Metadata returns metadata associated with the long-running operation.
 // Metadata itself does not contact the server, but Poll does.
 // To get the latest metadata, call this method after a successful call to Poll.
 // If the metadata is not available, the returned metadata and error are both nil.
 func (op *DeleteServiceOperation) Metadata() (*appenginepb.OperationMetadataV1, error) {
 	var meta appenginepb.OperationMetadataV1
 	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
 		return nil, nil
 	} else if err != nil {
 		return nil, err
 	}
 	return &meta, nil
 }

 // Done reports whether the long-running operation has completed.
 func (op *DeleteServiceOperation) Done() bool {
 	return op.lro.Done()
 }

 // Name returns the name of the long-running operation.
 // The name is assigned by the server and is unique within the service from which the operation is created.
 func (op *DeleteServiceOperation) Name() string {
 	return op.lro.Name()
 }

 // UpdateServiceOperation manages a long-running operation from UpdateService.
 type UpdateServiceOperation struct {
 	lro *longrunning.Operation
 }

 // UpdateServiceOperation returns a new UpdateServiceOperation from a given name.
 // The name must be that of a previously created UpdateServiceOperation, possibly from a different process.
 func (c *servicesGRPCClient) UpdateServiceOperation(name string) *UpdateServiceOperation {
 	return &UpdateServiceOperation{
 		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
 	}
 }

 // Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
 //
 // See documentation of Poll for error-handling information.
 func (op *UpdateServiceOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*appenginepb.Service, error) {
 	var resp appenginepb.Service
 	if err := op.lro.WaitWithInterval(ctx, &resp, time.Minute, opts...); err != nil {
 		return nil, err
 	}
 	return &resp, nil
 }

 // Poll fetches the latest state of the long-running operation.
 //
 // Poll also fetches the latest metadata, which can be retrieved by Metadata.
 //
 // If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
 // the operation has completed with failure, the error is returned and op.Done will return true.
 // If Poll succeeds and the operation has completed successfully,
 // op.Done will return true, and the response of the operation is returned.
 // If Poll succeeds and the operation has not completed, the returned response and error are both nil.
 func (op *UpdateServiceOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*appenginepb.Service, error) {
 	var resp appenginepb.Service
 	if err := op.lro.Poll(ctx, &resp, opts...); err != nil {
 		return nil, err
 	}
 	if !op.Done() {
 		return nil, nil
 	}
 	return &resp, nil
 }

 // Metadata returns metadata associated with the long-running operation.
 // Metadata itself does not contact the server, but Poll does.
 // To get the latest metadata, call this method after a successful call to Poll.
 // If the metadata is not available, the returned metadata and error are both nil.
 func (op *UpdateServiceOperation) Metadata() (*appenginepb.OperationMetadataV1, error) {
 	var meta appenginepb.OperationMetadataV1
 	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
 		return nil, nil
 	} else if err != nil {
 		return nil, err
 	}
 	return &meta, nil
 }

 // Done reports whether the long-running operation has completed.
 func (op *UpdateServiceOperation) Done() bool {
 	return op.lro.Done()
 }

 // Name returns the name of the long-running operation.
 // The name is assigned by the server and is unique within the service from which the operation is created.
 func (op *UpdateServiceOperation) Name() string {
 	return op.lro.Name()
 }

 // ServiceIterator manages a stream of *appenginepb.Service.
 type ServiceIterator struct {
 	items    []*appenginepb.Service
 	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 []*appenginepb.Service, nextPageToken string, err error)
 }

 // PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
 func (it *ServiceIterator) 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 *ServiceIterator) Next() (*appenginepb.Service, error) {
 	var item *appenginepb.Service
 	if err := it.nextFunc(); err != nil {
 		return item, err
 	}
 	item = it.items[0]
 	it.items = it.items[1:]
 	return item, nil
 }

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

 func (it *ServiceIterator) takeBuf() interface{} {
 	b := it.items
 	it.items = nil
 	return b
 }
	// Copyright 2021 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 appengine

	import (
	"context"
	"fmt"
	"math"
	"net/url"
	"time"

	"cloud.google.com/go/longrunning"
	lroauto "cloud.google.com/go/longrunning/autogen"
	gax "github.com/googleapis/gax-go/v2"
	"google.golang.org/api/iterator"
	"google.golang.org/api/option"
	"google.golang.org/api/option/internaloption"
	gtransport "google.golang.org/api/transport/grpc"
	appenginepb "google.golang.org/genproto/googleapis/appengine/v1"
	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
	"google.golang.org/grpc"
	"google.golang.org/grpc/metadata"
	"google.golang.org/protobuf/proto"
	)

	var newServicesClientHook clientHook

	// ServicesCallOptions contains the retry settings for each method of ServicesClient.
	type ServicesCallOptions struct {
	ListServices []gax.CallOption
	GetService []gax.CallOption
	UpdateService []gax.CallOption
	DeleteService []gax.CallOption
	}

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

	func defaultServicesCallOptions() *ServicesCallOptions {
	return &ServicesCallOptions{
	ListServices: []gax.CallOption{},
	GetService: []gax.CallOption{},
	UpdateService: []gax.CallOption{},
	DeleteService: []gax.CallOption{},
	}
	}

	// internalServicesClient is an interface that defines the methods availaible from App Engine Admin API.
	type internalServicesClient interface {
	Close() error
	setGoogleClientInfo(...string)
	Connection() *grpc.ClientConn
	ListServices(context.Context, appenginepb.ListServicesRequest, ...gax.CallOption) ServiceIterator
	GetService(context.Context, appenginepb.GetServiceRequest, ...gax.CallOption) (appenginepb.Service, error)
	UpdateService(context.Context, appenginepb.UpdateServiceRequest, ...gax.CallOption) (UpdateServiceOperation, error)
	UpdateServiceOperation(name string) *UpdateServiceOperation
	DeleteService(context.Context, appenginepb.DeleteServiceRequest, ...gax.CallOption) (DeleteServiceOperation, error)
	DeleteServiceOperation(name string) *DeleteServiceOperation
	}

	// ServicesClient is a client for interacting with App Engine Admin API.
	// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
	//
	// Manages services of an application.
	type ServicesClient struct {
	// The internal transport-dependent client.
	internalClient internalServicesClient

	// The call options for this service.
	CallOptions *ServicesCallOptions

	// LROClient is used internally to handle long-running operations.
	// It is exposed so that its CallOptions can be modified if required.
	// Users should not Close this client.
	LROClient *lroauto.OperationsClient
	}

	// 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 *ServicesClient) 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 *ServicesClient) setGoogleClientInfo(keyval ...string) {
	c.internalClient.setGoogleClientInfo(keyval...)
	}

	// Connection returns a connection to the API service.
	//
	// Deprecated.
	func (c ServicesClient) Connection() grpc.ClientConn {
	return c.internalClient.Connection()
	}

	// ListServices lists all the services in the application.
	func (c ServicesClient) ListServices(ctx context.Context, req appenginepb.ListServicesRequest, opts ...gax.CallOption) *ServiceIterator {
	return c.internalClient.ListServices(ctx, req, opts...)
	}

	// GetService gets the current configuration of the specified service.
	func (c ServicesClient) GetService(ctx context.Context, req appenginepb.GetServiceRequest, opts ...gax.CallOption) (*appenginepb.Service, error) {
	return c.internalClient.GetService(ctx, req, opts...)
	}

	// UpdateService updates the configuration of the specified service.
	func (c ServicesClient) UpdateService(ctx context.Context, req appenginepb.UpdateServiceRequest, opts ...gax.CallOption) (*UpdateServiceOperation, error) {
	return c.internalClient.UpdateService(ctx, req, opts...)
	}

	// UpdateServiceOperation returns a new UpdateServiceOperation from a given name.
	// The name must be that of a previously created UpdateServiceOperation, possibly from a different process.
	func (c ServicesClient) UpdateServiceOperation(name string) UpdateServiceOperation {
	return c.internalClient.UpdateServiceOperation(name)
	}

	// DeleteService deletes the specified service and all enclosed versions.
	func (c ServicesClient) DeleteService(ctx context.Context, req appenginepb.DeleteServiceRequest, opts ...gax.CallOption) (*DeleteServiceOperation, error) {
	return c.internalClient.DeleteService(ctx, req, opts...)
	}

	// DeleteServiceOperation returns a new DeleteServiceOperation from a given name.
	// The name must be that of a previously created DeleteServiceOperation, possibly from a different process.
	func (c ServicesClient) DeleteServiceOperation(name string) DeleteServiceOperation {
	return c.internalClient.DeleteServiceOperation(name)
	}

	// servicesGRPCClient is a client for interacting with App Engine Admin API over gRPC transport.
	//
	// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
	type servicesGRPCClient 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 ServicesClient
	CallOptions **ServicesCallOptions

	// The gRPC API client.
	servicesClient appenginepb.ServicesClient

	// LROClient is used internally to handle long-running operations.
	// It is exposed so that its CallOptions can be modified if required.
	// Users should not Close this client.
	LROClient **lroauto.OperationsClient

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

	// NewServicesClient creates a new services client based on gRPC.
	// The returned client must be Closed when it is done being used to clean up its underlying connections.
	//
	// Manages services of an application.
	func NewServicesClient(ctx context.Context, opts ...option.ClientOption) (*ServicesClient, error) {
	clientOpts := defaultServicesGRPCClientOptions()
	if newServicesClientHook != nil {
	hookOpts, err := newServicesClientHook(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 := ServicesClient{CallOptions: defaultServicesCallOptions()}

	c := &servicesGRPCClient{
	connPool: connPool,
	disableDeadlines: disableDeadlines,
	servicesClient: appenginepb.NewServicesClient(connPool),
	CallOptions: &client.CallOptions,
	}
	c.setGoogleClientInfo()

	client.internalClient = c

	client.LROClient, err = lroauto.NewOperationsClient(ctx, gtransport.WithConnPool(connPool))
	if err != nil {
	// This error "should not happen", since we are just reusing old connection pool
	// and never actually need to dial.
	// If this does happen, we could leak connp. However, we cannot close conn:
	// If the user invoked the constructor with option.WithGRPCConn,
	// we would close a connection that's still in use.
	// TODO: investigate error conditions.
	return nil, err
	}
	c.LROClient = &client.LROClient
	return &client, nil
	}

	// Connection returns a connection to the API service.
	//
	// Deprecated.
	func (c servicesGRPCClient) 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 *servicesGRPCClient) setGoogleClientInfo(keyval ...string) {
	kv := append([]string{"gl-go", versionGo()}, keyval...)
	kv = append(kv, "gapic", versionClient, "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 *servicesGRPCClient) Close() error {
	return c.connPool.Close()
	}

	func (c servicesGRPCClient) ListServices(ctx context.Context, req appenginepb.ListServicesRequest, opts ...gax.CallOption) *ServiceIterator {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((c.CallOptions).ListServices[0:len((c.CallOptions).ListServices):len((*c.CallOptions).ListServices)], opts...)
	it := &ServiceIterator{}
	req = proto.Clone(req).(*appenginepb.ListServicesRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*appenginepb.Service, string, error) {
	var resp *appenginepb.ListServicesResponse
	req.PageToken = pageToken
	if pageSize > math.MaxInt32 {
	req.PageSize = math.MaxInt32
	} else {
	req.PageSize = int32(pageSize)
	}
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	resp, err = c.servicesClient.ListServices(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, "", err
	}

	it.Response = resp
	return resp.GetServices(), 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
	}

	func (c servicesGRPCClient) GetService(ctx context.Context, req appenginepb.GetServiceRequest, opts ...gax.CallOption) (*appenginepb.Service, error) {
	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).GetService[0:len((c.CallOptions).GetService):len((*c.CallOptions).GetService)], opts...)
	var resp *appenginepb.Service
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	resp, err = c.servicesClient.GetService(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, err
	}
	return resp, nil
	}

	func (c servicesGRPCClient) UpdateService(ctx context.Context, req appenginepb.UpdateServiceRequest, opts ...gax.CallOption) (*UpdateServiceOperation, error) {
	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).UpdateService[0:len((c.CallOptions).UpdateService):len((*c.CallOptions).UpdateService)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	resp, err = c.servicesClient.UpdateService(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, err
	}
	return &UpdateServiceOperation{
	lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
	}

	func (c servicesGRPCClient) DeleteService(ctx context.Context, req appenginepb.DeleteServiceRequest, opts ...gax.CallOption) (*DeleteServiceOperation, error) {
	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).DeleteService[0:len((c.CallOptions).DeleteService):len((*c.CallOptions).DeleteService)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	resp, err = c.servicesClient.DeleteService(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, err
	}
	return &DeleteServiceOperation{
	lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
	}

	// DeleteServiceOperation manages a long-running operation from DeleteService.
	type DeleteServiceOperation struct {
	lro *longrunning.Operation
	}

	// DeleteServiceOperation returns a new DeleteServiceOperation from a given name.
	// The name must be that of a previously created DeleteServiceOperation, possibly from a different process.
	func (c servicesGRPCClient) DeleteServiceOperation(name string) DeleteServiceOperation {
	return &DeleteServiceOperation{
	lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
	}

	// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
	//
	// See documentation of Poll for error-handling information.
	func (op *DeleteServiceOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.WaitWithInterval(ctx, nil, time.Minute, opts...)
	}

	// Poll fetches the latest state of the long-running operation.
	//
	// Poll also fetches the latest metadata, which can be retrieved by Metadata.
	//
	// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
	// the operation has completed with failure, the error is returned and op.Done will return true.
	// If Poll succeeds and the operation has completed successfully,
	// op.Done will return true, and the response of the operation is returned.
	// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
	func (op *DeleteServiceOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.Poll(ctx, nil, opts...)
	}

	// Metadata returns metadata associated with the long-running operation.
	// Metadata itself does not contact the server, but Poll does.
	// To get the latest metadata, call this method after a successful call to Poll.
	// If the metadata is not available, the returned metadata and error are both nil.
	func (op DeleteServiceOperation) Metadata() (appenginepb.OperationMetadataV1, error) {
	var meta appenginepb.OperationMetadataV1
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
	return nil, nil
	} else if err != nil {
	return nil, err
	}
	return &meta, nil
	}

	// Done reports whether the long-running operation has completed.
	func (op *DeleteServiceOperation) Done() bool {
	return op.lro.Done()
	}

	// Name returns the name of the long-running operation.
	// The name is assigned by the server and is unique within the service from which the operation is created.
	func (op *DeleteServiceOperation) Name() string {
	return op.lro.Name()
	}

	// UpdateServiceOperation manages a long-running operation from UpdateService.
	type UpdateServiceOperation struct {
	lro *longrunning.Operation
	}

	// UpdateServiceOperation returns a new UpdateServiceOperation from a given name.
	// The name must be that of a previously created UpdateServiceOperation, possibly from a different process.
	func (c servicesGRPCClient) UpdateServiceOperation(name string) UpdateServiceOperation {
	return &UpdateServiceOperation{
	lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
	}

	// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
	//
	// See documentation of Poll for error-handling information.
	func (op UpdateServiceOperation) Wait(ctx context.Context, opts ...gax.CallOption) (appenginepb.Service, error) {
	var resp appenginepb.Service
	if err := op.lro.WaitWithInterval(ctx, &resp, time.Minute, opts...); err != nil {
	return nil, err
	}
	return &resp, nil
	}

	// Poll fetches the latest state of the long-running operation.
	//
	// Poll also fetches the latest metadata, which can be retrieved by Metadata.
	//
	// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
	// the operation has completed with failure, the error is returned and op.Done will return true.
	// If Poll succeeds and the operation has completed successfully,
	// op.Done will return true, and the response of the operation is returned.
	// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
	func (op UpdateServiceOperation) Poll(ctx context.Context, opts ...gax.CallOption) (appenginepb.Service, error) {
	var resp appenginepb.Service
	if err := op.lro.Poll(ctx, &resp, opts...); err != nil {
	return nil, err
	}
	if !op.Done() {
	return nil, nil
	}
	return &resp, nil
	}

	// Metadata returns metadata associated with the long-running operation.
	// Metadata itself does not contact the server, but Poll does.
	// To get the latest metadata, call this method after a successful call to Poll.
	// If the metadata is not available, the returned metadata and error are both nil.
	func (op UpdateServiceOperation) Metadata() (appenginepb.OperationMetadataV1, error) {
	var meta appenginepb.OperationMetadataV1
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
	return nil, nil
	} else if err != nil {
	return nil, err
	}
	return &meta, nil
	}

	// Done reports whether the long-running operation has completed.
	func (op *UpdateServiceOperation) Done() bool {
	return op.lro.Done()
	}

	// Name returns the name of the long-running operation.
	// The name is assigned by the server and is unique within the service from which the operation is created.
	func (op *UpdateServiceOperation) Name() string {
	return op.lro.Name()
	}

	// ServiceIterator manages a stream of *appenginepb.Service.
	type ServiceIterator struct {
	items []*appenginepb.Service
	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 []*appenginepb.Service, nextPageToken string, err error)
	}

	// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
	func (it ServiceIterator) 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 ServiceIterator) Next() (appenginepb.Service, error) {
	var item *appenginepb.Service
	if err := it.nextFunc(); err != nil {
	return item, err
	}
	item = it.items[0]
	it.items = it.items[1:]
	return item, nil
	}

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

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