datastore/admin/apiv1/datastore_admin_client.go - gocloud - Git at Google

 // 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.

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

 package admin

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

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

 var newDatastoreAdminClientHook clientHook

 // DatastoreAdminCallOptions contains the retry settings for each method of DatastoreAdminClient.
 type DatastoreAdminCallOptions struct {
 	ExportEntities []gax.CallOption
 	ImportEntities []gax.CallOption
 	GetIndex       []gax.CallOption
 	ListIndexes    []gax.CallOption
 }

 func defaultDatastoreAdminClientOptions() []option.ClientOption {
 	return []option.ClientOption{
 		option.WithEndpoint("datastore.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
 			grpc.MaxCallRecvMsgSize(math.MaxInt32))),
 	}
 }

 func defaultDatastoreAdminCallOptions() *DatastoreAdminCallOptions {
 	return &DatastoreAdminCallOptions{
 		ExportEntities: []gax.CallOption{},
 		ImportEntities: []gax.CallOption{},
 		GetIndex: []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,
 				})
 			}),
 		},
 		ListIndexes: []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,
 				})
 			}),
 		},
 	}
 }

 // DatastoreAdminClient is a client for interacting with Cloud Datastore API.
 //
 // Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
 type DatastoreAdminClient 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

 	// The gRPC API client.
 	datastoreAdminClient adminpb.DatastoreAdminClient

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

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

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

 // NewDatastoreAdminClient creates a new datastore admin client.
 //
 // Google Cloud Datastore Admin API
 //
 // The Datastore Admin API provides several admin services for Cloud Datastore.
 //
 // ConceptsProject, 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).
 //
 // ServicesExport/ImportThe 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.
 //
 // IndexThe 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.
 //
 // OperationThe 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.
 func NewDatastoreAdminClient(ctx context.Context, opts ...option.ClientOption) (*DatastoreAdminClient, error) {
 	clientOpts := defaultDatastoreAdminClientOptions()

 	if newDatastoreAdminClientHook != nil {
 		hookOpts, err := newDatastoreAdminClientHook(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
 	}
 	c := &DatastoreAdminClient{
 		connPool:         connPool,
 		disableDeadlines: disableDeadlines,
 		CallOptions:      defaultDatastoreAdminCallOptions(),

 		datastoreAdminClient: adminpb.NewDatastoreAdminClient(connPool),
 	}
 	c.setGoogleClientInfo()

 	c.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
 	}
 	return c, nil
 }

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

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

 // ExportEntities 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.
 func (c *DatastoreAdminClient) ExportEntities(ctx context.Context, req *adminpb.ExportEntitiesRequest, opts ...gax.CallOption) (*ExportEntitiesOperation, error) {
 	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
 		cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
 		defer cancel()
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project_id", url.QueryEscape(req.GetProjectId())))
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append(c.CallOptions.ExportEntities[0:len(c.CallOptions.ExportEntities):len(c.CallOptions.ExportEntities)], opts...)
 	var resp *longrunningpb.Operation
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 		var err error
 		resp, err = c.datastoreAdminClient.ExportEntities(ctx, req, settings.GRPC...)
 		return err
 	}, opts...)
 	if err != nil {
 		return nil, err
 	}
 	return &ExportEntitiesOperation{
 		lro: longrunning.InternalNewOperation(c.LROClient, resp),
 	}, nil
 }

 // ImportEntities 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.
 func (c *DatastoreAdminClient) ImportEntities(ctx context.Context, req *adminpb.ImportEntitiesRequest, opts ...gax.CallOption) (*ImportEntitiesOperation, error) {
 	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
 		cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
 		defer cancel()
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project_id", url.QueryEscape(req.GetProjectId())))
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append(c.CallOptions.ImportEntities[0:len(c.CallOptions.ImportEntities):len(c.CallOptions.ImportEntities)], opts...)
 	var resp *longrunningpb.Operation
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 		var err error
 		resp, err = c.datastoreAdminClient.ImportEntities(ctx, req, settings.GRPC...)
 		return err
 	}, opts...)
 	if err != nil {
 		return nil, err
 	}
 	return &ImportEntitiesOperation{
 		lro: longrunning.InternalNewOperation(c.LROClient, resp),
 	}, nil
 }

 // GetIndex gets an index.
 func (c *DatastoreAdminClient) GetIndex(ctx context.Context, req *adminpb.GetIndexRequest, opts ...gax.CallOption) (*adminpb.Index, error) {
 	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
 		cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
 		defer cancel()
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "index_id", url.QueryEscape(req.GetIndexId())))
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append(c.CallOptions.GetIndex[0:len(c.CallOptions.GetIndex):len(c.CallOptions.GetIndex)], opts...)
 	var resp *adminpb.Index
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 		var err error
 		resp, err = c.datastoreAdminClient.GetIndex(ctx, req, settings.GRPC...)
 		return err
 	}, opts...)
 	if err != nil {
 		return nil, err
 	}
 	return resp, nil
 }

 // ListIndexes 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.
 func (c *DatastoreAdminClient) ListIndexes(ctx context.Context, req *adminpb.ListIndexesRequest, opts ...gax.CallOption) *IndexIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project_id", url.QueryEscape(req.GetProjectId())))
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append(c.CallOptions.ListIndexes[0:len(c.CallOptions.ListIndexes):len(c.CallOptions.ListIndexes)], opts...)
 	it := &IndexIterator{}
 	req = proto.Clone(req).(*adminpb.ListIndexesRequest)
 	it.InternalFetch = func(pageSize int, pageToken string) ([]*adminpb.Index, string, error) {
 		var resp *adminpb.ListIndexesResponse
 		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.datastoreAdminClient.ListIndexes(ctx, req, settings.GRPC...)
 			return err
 		}, opts...)
 		if err != nil {
 			return nil, "", err
 		}

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

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

 // ExportEntitiesOperation returns a new ExportEntitiesOperation from a given name.
 // The name must be that of a previously created ExportEntitiesOperation, possibly from a different process.
 func (c *DatastoreAdminClient) ExportEntitiesOperation(name string) *ExportEntitiesOperation {
 	return &ExportEntitiesOperation{
 		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 *ExportEntitiesOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*adminpb.ExportEntitiesResponse, error) {
 	var resp adminpb.ExportEntitiesResponse
 	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 *ExportEntitiesOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*adminpb.ExportEntitiesResponse, error) {
 	var resp adminpb.ExportEntitiesResponse
 	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 *ExportEntitiesOperation) Metadata() (*adminpb.ExportEntitiesMetadata, error) {
 	var meta adminpb.ExportEntitiesMetadata
 	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 *ExportEntitiesOperation) 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 *ExportEntitiesOperation) Name() string {
 	return op.lro.Name()
 }

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

 // ImportEntitiesOperation returns a new ImportEntitiesOperation from a given name.
 // The name must be that of a previously created ImportEntitiesOperation, possibly from a different process.
 func (c *DatastoreAdminClient) ImportEntitiesOperation(name string) *ImportEntitiesOperation {
 	return &ImportEntitiesOperation{
 		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 *ImportEntitiesOperation) 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 *ImportEntitiesOperation) 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 *ImportEntitiesOperation) Metadata() (*adminpb.ImportEntitiesMetadata, error) {
 	var meta adminpb.ImportEntitiesMetadata
 	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 *ImportEntitiesOperation) 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 *ImportEntitiesOperation) Name() string {
 	return op.lro.Name()
 }

 // IndexIterator manages a stream of *adminpb.Index.
 type IndexIterator struct {
 	items    []*adminpb.Index
 	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 []*adminpb.Index, nextPageToken string, err error)
 }

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

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

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

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

	package admin

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

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

	var newDatastoreAdminClientHook clientHook

	// DatastoreAdminCallOptions contains the retry settings for each method of DatastoreAdminClient.
	type DatastoreAdminCallOptions struct {
	ExportEntities []gax.CallOption
	ImportEntities []gax.CallOption
	GetIndex []gax.CallOption
	ListIndexes []gax.CallOption
	}

	func defaultDatastoreAdminClientOptions() []option.ClientOption {
	return []option.ClientOption{
	option.WithEndpoint("datastore.googleapis.com:443"),
	option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
	option.WithScopes(DefaultAuthScopes()...),
	option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
	grpc.MaxCallRecvMsgSize(math.MaxInt32))),
	}
	}

	func defaultDatastoreAdminCallOptions() *DatastoreAdminCallOptions {
	return &DatastoreAdminCallOptions{
	ExportEntities: []gax.CallOption{},
	ImportEntities: []gax.CallOption{},
	GetIndex: []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,
	})
	}),
	},
	ListIndexes: []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,
	})
	}),
	},
	}
	}

	// DatastoreAdminClient is a client for interacting with Cloud Datastore API.
	//
	// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
	type DatastoreAdminClient 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

	// The gRPC API client.
	datastoreAdminClient adminpb.DatastoreAdminClient

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

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

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

	// NewDatastoreAdminClient creates a new datastore admin client.
	//
	// Google Cloud Datastore Admin API
	//
	// The Datastore Admin API provides several admin services for Cloud Datastore.
	//
	// ConceptsProject, 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).
	//
	// ServicesExport/ImportThe 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.
	//
	// IndexThe 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.
	//
	// OperationThe 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.
	func NewDatastoreAdminClient(ctx context.Context, opts ...option.ClientOption) (*DatastoreAdminClient, error) {
	clientOpts := defaultDatastoreAdminClientOptions()

	if newDatastoreAdminClientHook != nil {
	hookOpts, err := newDatastoreAdminClientHook(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
	}
	c := &DatastoreAdminClient{
	connPool: connPool,
	disableDeadlines: disableDeadlines,
	CallOptions: defaultDatastoreAdminCallOptions(),

	datastoreAdminClient: adminpb.NewDatastoreAdminClient(connPool),
	}
	c.setGoogleClientInfo()

	c.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
	}
	return c, nil
	}

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

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

	// ExportEntities 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.
	func (c DatastoreAdminClient) ExportEntities(ctx context.Context, req adminpb.ExportEntitiesRequest, opts ...gax.CallOption) (*ExportEntitiesOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
	cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
	defer cancel()
	ctx = cctx
	}
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project_id", url.QueryEscape(req.GetProjectId())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append(c.CallOptions.ExportEntities[0:len(c.CallOptions.ExportEntities):len(c.CallOptions.ExportEntities)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	resp, err = c.datastoreAdminClient.ExportEntities(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, err
	}
	return &ExportEntitiesOperation{
	lro: longrunning.InternalNewOperation(c.LROClient, resp),
	}, nil
	}

	// ImportEntities 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.
	func (c DatastoreAdminClient) ImportEntities(ctx context.Context, req adminpb.ImportEntitiesRequest, opts ...gax.CallOption) (*ImportEntitiesOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
	cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
	defer cancel()
	ctx = cctx
	}
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project_id", url.QueryEscape(req.GetProjectId())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append(c.CallOptions.ImportEntities[0:len(c.CallOptions.ImportEntities):len(c.CallOptions.ImportEntities)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	resp, err = c.datastoreAdminClient.ImportEntities(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, err
	}
	return &ImportEntitiesOperation{
	lro: longrunning.InternalNewOperation(c.LROClient, resp),
	}, nil
	}

	// GetIndex gets an index.
	func (c DatastoreAdminClient) GetIndex(ctx context.Context, req adminpb.GetIndexRequest, opts ...gax.CallOption) (*adminpb.Index, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
	cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
	defer cancel()
	ctx = cctx
	}
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "index_id", url.QueryEscape(req.GetIndexId())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append(c.CallOptions.GetIndex[0:len(c.CallOptions.GetIndex):len(c.CallOptions.GetIndex)], opts...)
	var resp *adminpb.Index
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	resp, err = c.datastoreAdminClient.GetIndex(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, err
	}
	return resp, nil
	}

	// ListIndexes 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.
	func (c DatastoreAdminClient) ListIndexes(ctx context.Context, req adminpb.ListIndexesRequest, opts ...gax.CallOption) *IndexIterator {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project_id", url.QueryEscape(req.GetProjectId())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append(c.CallOptions.ListIndexes[0:len(c.CallOptions.ListIndexes):len(c.CallOptions.ListIndexes)], opts...)
	it := &IndexIterator{}
	req = proto.Clone(req).(*adminpb.ListIndexesRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*adminpb.Index, string, error) {
	var resp *adminpb.ListIndexesResponse
	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.datastoreAdminClient.ListIndexes(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, "", err
	}

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

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

	// ExportEntitiesOperation returns a new ExportEntitiesOperation from a given name.
	// The name must be that of a previously created ExportEntitiesOperation, possibly from a different process.
	func (c DatastoreAdminClient) ExportEntitiesOperation(name string) ExportEntitiesOperation {
	return &ExportEntitiesOperation{
	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 ExportEntitiesOperation) Wait(ctx context.Context, opts ...gax.CallOption) (adminpb.ExportEntitiesResponse, error) {
	var resp adminpb.ExportEntitiesResponse
	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 ExportEntitiesOperation) Poll(ctx context.Context, opts ...gax.CallOption) (adminpb.ExportEntitiesResponse, error) {
	var resp adminpb.ExportEntitiesResponse
	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 ExportEntitiesOperation) Metadata() (adminpb.ExportEntitiesMetadata, error) {
	var meta adminpb.ExportEntitiesMetadata
	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 *ExportEntitiesOperation) 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 *ExportEntitiesOperation) Name() string {
	return op.lro.Name()
	}

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

	// ImportEntitiesOperation returns a new ImportEntitiesOperation from a given name.
	// The name must be that of a previously created ImportEntitiesOperation, possibly from a different process.
	func (c DatastoreAdminClient) ImportEntitiesOperation(name string) ImportEntitiesOperation {
	return &ImportEntitiesOperation{
	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 *ImportEntitiesOperation) 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 *ImportEntitiesOperation) 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 ImportEntitiesOperation) Metadata() (adminpb.ImportEntitiesMetadata, error) {
	var meta adminpb.ImportEntitiesMetadata
	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 *ImportEntitiesOperation) 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 *ImportEntitiesOperation) Name() string {
	return op.lro.Name()
	}

	// IndexIterator manages a stream of *adminpb.Index.
	type IndexIterator struct {
	items []*adminpb.Index
	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 []*adminpb.Index, nextPageToken string, err error)
	}

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

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

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