filestore/apiv1/cloud_filestore_manager_client.go

// 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 filestore

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"
	commonpb "google.golang.org/genproto/googleapis/cloud/common"
	filestorepb "google.golang.org/genproto/googleapis/cloud/filestore/v1"
	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
	"google.golang.org/grpc"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/metadata"
	"google.golang.org/protobuf/proto"
)

var newCloudFilestoreManagerClientHook clientHook

// CloudFilestoreManagerCallOptions contains the retry settings for each method of CloudFilestoreManagerClient.
type CloudFilestoreManagerCallOptions struct {
	ListInstances   []gax.CallOption
	GetInstance     []gax.CallOption
	CreateInstance  []gax.CallOption
	UpdateInstance  []gax.CallOption
	RestoreInstance []gax.CallOption
	DeleteInstance  []gax.CallOption
	ListBackups     []gax.CallOption
	GetBackup       []gax.CallOption
	CreateBackup    []gax.CallOption
	DeleteBackup    []gax.CallOption
	UpdateBackup    []gax.CallOption
}

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

func defaultCloudFilestoreManagerCallOptions() *CloudFilestoreManagerCallOptions {
	return &CloudFilestoreManagerCallOptions{
		ListInstances: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    250 * time.Millisecond,
					Max:        32000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		GetInstance: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    250 * time.Millisecond,
					Max:        32000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		CreateInstance:  []gax.CallOption{},
		UpdateInstance:  []gax.CallOption{},
		RestoreInstance: []gax.CallOption{},
		DeleteInstance:  []gax.CallOption{},
		ListBackups: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    250 * time.Millisecond,
					Max:        32000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		GetBackup: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    250 * time.Millisecond,
					Max:        32000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		CreateBackup: []gax.CallOption{},
		DeleteBackup: []gax.CallOption{},
		UpdateBackup: []gax.CallOption{},
	}
}

// internalCloudFilestoreManagerClient is an interface that defines the methods availaible from Cloud Filestore API.
type internalCloudFilestoreManagerClient interface {
	Close() error
	setGoogleClientInfo(...string)
	Connection() *grpc.ClientConn
	ListInstances(context.Context, *filestorepb.ListInstancesRequest, ...gax.CallOption) *InstanceIterator
	GetInstance(context.Context, *filestorepb.GetInstanceRequest, ...gax.CallOption) (*filestorepb.Instance, error)
	CreateInstance(context.Context, *filestorepb.CreateInstanceRequest, ...gax.CallOption) (*CreateInstanceOperation, error)
	CreateInstanceOperation(name string) *CreateInstanceOperation
	UpdateInstance(context.Context, *filestorepb.UpdateInstanceRequest, ...gax.CallOption) (*UpdateInstanceOperation, error)
	UpdateInstanceOperation(name string) *UpdateInstanceOperation
	RestoreInstance(context.Context, *filestorepb.RestoreInstanceRequest, ...gax.CallOption) (*RestoreInstanceOperation, error)
	RestoreInstanceOperation(name string) *RestoreInstanceOperation
	DeleteInstance(context.Context, *filestorepb.DeleteInstanceRequest, ...gax.CallOption) (*DeleteInstanceOperation, error)
	DeleteInstanceOperation(name string) *DeleteInstanceOperation
	ListBackups(context.Context, *filestorepb.ListBackupsRequest, ...gax.CallOption) *BackupIterator
	GetBackup(context.Context, *filestorepb.GetBackupRequest, ...gax.CallOption) (*filestorepb.Backup, error)
	CreateBackup(context.Context, *filestorepb.CreateBackupRequest, ...gax.CallOption) (*CreateBackupOperation, error)
	CreateBackupOperation(name string) *CreateBackupOperation
	DeleteBackup(context.Context, *filestorepb.DeleteBackupRequest, ...gax.CallOption) (*DeleteBackupOperation, error)
	DeleteBackupOperation(name string) *DeleteBackupOperation
	UpdateBackup(context.Context, *filestorepb.UpdateBackupRequest, ...gax.CallOption) (*UpdateBackupOperation, error)
	UpdateBackupOperation(name string) *UpdateBackupOperation
}

// CloudFilestoreManagerClient is a client for interacting with Cloud Filestore API.
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
//
// Configures and manages Cloud Filestore resources.
//
// Cloud Filestore Manager v1.
//
// The file.googleapis.com service implements the Cloud Filestore API and
// defines the following resource model for managing instances:
//
//   The service works with a collection of cloud projects, named: /projects/*
//
//   Each project has a collection of available locations, named: /locations/*
//
//   Each location has a collection of instances and backups, named:
//   /instances/* and /backups/* respectively.
//
//   As such, Cloud Filestore instances are resources of the form:
//   /projects/{project_number}/locations/{location_id}/instances/{instance_id}
//   and backups are resources of the form:
//   /projects/{project_number}/locations/{location_id}/backup/{backup_id}
//
// Note that location_id must be a GCP zone for instances and but to a GCP
// region for backups; for example:
//
//   projects/12345/locations/us-central1-c/instances/my-filestore
//
//   projects/12345/locations/us-central1/backups/my-backup
type CloudFilestoreManagerClient struct {
	// The internal transport-dependent client.
	internalClient internalCloudFilestoreManagerClient

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

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

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

// ListInstances lists all instances in a project for either a specified location
// or for all locations.
func (c *CloudFilestoreManagerClient) ListInstances(ctx context.Context, req *filestorepb.ListInstancesRequest, opts ...gax.CallOption) *InstanceIterator {
	return c.internalClient.ListInstances(ctx, req, opts...)
}

// GetInstance gets the details of a specific instance.
func (c *CloudFilestoreManagerClient) GetInstance(ctx context.Context, req *filestorepb.GetInstanceRequest, opts ...gax.CallOption) (*filestorepb.Instance, error) {
	return c.internalClient.GetInstance(ctx, req, opts...)
}

// CreateInstance creates an instance.
// When creating from a backup, the capacity of the new instance needs to be
// equal to or larger than the capacity of the backup (and also equal to or
// larger than the minimum capacity of the tier).
func (c *CloudFilestoreManagerClient) CreateInstance(ctx context.Context, req *filestorepb.CreateInstanceRequest, opts ...gax.CallOption) (*CreateInstanceOperation, error) {
	return c.internalClient.CreateInstance(ctx, req, opts...)
}

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

// UpdateInstance updates the settings of a specific instance.
func (c *CloudFilestoreManagerClient) UpdateInstance(ctx context.Context, req *filestorepb.UpdateInstanceRequest, opts ...gax.CallOption) (*UpdateInstanceOperation, error) {
	return c.internalClient.UpdateInstance(ctx, req, opts...)
}

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

// RestoreInstance restores an existing instance’s file share from a backup.
//
// The capacity of the instance needs to be equal to or larger than the
// capacity of the backup (and also equal to or larger than the minimum
// capacity of the tier).
func (c *CloudFilestoreManagerClient) RestoreInstance(ctx context.Context, req *filestorepb.RestoreInstanceRequest, opts ...gax.CallOption) (*RestoreInstanceOperation, error) {
	return c.internalClient.RestoreInstance(ctx, req, opts...)
}

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

// DeleteInstance deletes an instance.
func (c *CloudFilestoreManagerClient) DeleteInstance(ctx context.Context, req *filestorepb.DeleteInstanceRequest, opts ...gax.CallOption) (*DeleteInstanceOperation, error) {
	return c.internalClient.DeleteInstance(ctx, req, opts...)
}

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

// ListBackups lists all backups in a project for either a specified location or for all
// locations.
func (c *CloudFilestoreManagerClient) ListBackups(ctx context.Context, req *filestorepb.ListBackupsRequest, opts ...gax.CallOption) *BackupIterator {
	return c.internalClient.ListBackups(ctx, req, opts...)
}

// GetBackup gets the details of a specific backup.
func (c *CloudFilestoreManagerClient) GetBackup(ctx context.Context, req *filestorepb.GetBackupRequest, opts ...gax.CallOption) (*filestorepb.Backup, error) {
	return c.internalClient.GetBackup(ctx, req, opts...)
}

// CreateBackup creates a backup.
func (c *CloudFilestoreManagerClient) CreateBackup(ctx context.Context, req *filestorepb.CreateBackupRequest, opts ...gax.CallOption) (*CreateBackupOperation, error) {
	return c.internalClient.CreateBackup(ctx, req, opts...)
}

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

// DeleteBackup deletes a backup.
func (c *CloudFilestoreManagerClient) DeleteBackup(ctx context.Context, req *filestorepb.DeleteBackupRequest, opts ...gax.CallOption) (*DeleteBackupOperation, error) {
	return c.internalClient.DeleteBackup(ctx, req, opts...)
}

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

// UpdateBackup updates the settings of a specific backup.
func (c *CloudFilestoreManagerClient) UpdateBackup(ctx context.Context, req *filestorepb.UpdateBackupRequest, opts ...gax.CallOption) (*UpdateBackupOperation, error) {
	return c.internalClient.UpdateBackup(ctx, req, opts...)
}

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

// cloudFilestoreManagerGRPCClient is a client for interacting with Cloud Filestore API over gRPC transport.
//
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
type cloudFilestoreManagerGRPCClient 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 CloudFilestoreManagerClient
	CallOptions **CloudFilestoreManagerCallOptions

	// The gRPC API client.
	cloudFilestoreManagerClient filestorepb.CloudFilestoreManagerClient

	// 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
}

// NewCloudFilestoreManagerClient creates a new cloud filestore manager client based on gRPC.
// The returned client must be Closed when it is done being used to clean up its underlying connections.
//
// Configures and manages Cloud Filestore resources.
//
// Cloud Filestore Manager v1.
//
// The file.googleapis.com service implements the Cloud Filestore API and
// defines the following resource model for managing instances:
//
//   The service works with a collection of cloud projects, named: /projects/*
//
//   Each project has a collection of available locations, named: /locations/*
//
//   Each location has a collection of instances and backups, named:
//   /instances/* and /backups/* respectively.
//
//   As such, Cloud Filestore instances are resources of the form:
//   /projects/{project_number}/locations/{location_id}/instances/{instance_id}
//   and backups are resources of the form:
//   /projects/{project_number}/locations/{location_id}/backup/{backup_id}
//
// Note that location_id must be a GCP zone for instances and but to a GCP
// region for backups; for example:
//
//   projects/12345/locations/us-central1-c/instances/my-filestore
//
//   projects/12345/locations/us-central1/backups/my-backup
func NewCloudFilestoreManagerClient(ctx context.Context, opts ...option.ClientOption) (*CloudFilestoreManagerClient, error) {
	clientOpts := defaultCloudFilestoreManagerGRPCClientOptions()
	if newCloudFilestoreManagerClientHook != nil {
		hookOpts, err := newCloudFilestoreManagerClientHook(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 := CloudFilestoreManagerClient{CallOptions: defaultCloudFilestoreManagerCallOptions()}

	c := &cloudFilestoreManagerGRPCClient{
		connPool:                    connPool,
		disableDeadlines:            disableDeadlines,
		cloudFilestoreManagerClient: filestorepb.NewCloudFilestoreManagerClient(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 *cloudFilestoreManagerGRPCClient) 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 *cloudFilestoreManagerGRPCClient) 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 *cloudFilestoreManagerGRPCClient) Close() error {
	return c.connPool.Close()
}

func (c *cloudFilestoreManagerGRPCClient) ListInstances(ctx context.Context, req *filestorepb.ListInstancesRequest, opts ...gax.CallOption) *InstanceIterator {
	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).ListInstances[0:len((*c.CallOptions).ListInstances):len((*c.CallOptions).ListInstances)], opts...)
	it := &InstanceIterator{}
	req = proto.Clone(req).(*filestorepb.ListInstancesRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*filestorepb.Instance, string, error) {
		resp := &filestorepb.ListInstancesResponse{}
		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.cloudFilestoreManagerClient.ListInstances(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetInstances(), 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 *cloudFilestoreManagerGRPCClient) GetInstance(ctx context.Context, req *filestorepb.GetInstanceRequest, opts ...gax.CallOption) (*filestorepb.Instance, 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", "name", url.QueryEscape(req.GetName())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).GetInstance[0:len((*c.CallOptions).GetInstance):len((*c.CallOptions).GetInstance)], opts...)
	var resp *filestorepb.Instance
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.cloudFilestoreManagerClient.GetInstance(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *cloudFilestoreManagerGRPCClient) CreateInstance(ctx context.Context, req *filestorepb.CreateInstanceRequest, opts ...gax.CallOption) (*CreateInstanceOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	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).CreateInstance[0:len((*c.CallOptions).CreateInstance):len((*c.CallOptions).CreateInstance)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.cloudFilestoreManagerClient.CreateInstance(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &CreateInstanceOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *cloudFilestoreManagerGRPCClient) UpdateInstance(ctx context.Context, req *filestorepb.UpdateInstanceRequest, opts ...gax.CallOption) (*UpdateInstanceOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 14400000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "instance.name", url.QueryEscape(req.GetInstance().GetName())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).UpdateInstance[0:len((*c.CallOptions).UpdateInstance):len((*c.CallOptions).UpdateInstance)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.cloudFilestoreManagerClient.UpdateInstance(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &UpdateInstanceOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *cloudFilestoreManagerGRPCClient) RestoreInstance(ctx context.Context, req *filestorepb.RestoreInstanceRequest, opts ...gax.CallOption) (*RestoreInstanceOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	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).RestoreInstance[0:len((*c.CallOptions).RestoreInstance):len((*c.CallOptions).RestoreInstance)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.cloudFilestoreManagerClient.RestoreInstance(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &RestoreInstanceOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *cloudFilestoreManagerGRPCClient) DeleteInstance(ctx context.Context, req *filestorepb.DeleteInstanceRequest, opts ...gax.CallOption) (*DeleteInstanceOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 600000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	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).DeleteInstance[0:len((*c.CallOptions).DeleteInstance):len((*c.CallOptions).DeleteInstance)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.cloudFilestoreManagerClient.DeleteInstance(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &DeleteInstanceOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *cloudFilestoreManagerGRPCClient) ListBackups(ctx context.Context, req *filestorepb.ListBackupsRequest, opts ...gax.CallOption) *BackupIterator {
	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).ListBackups[0:len((*c.CallOptions).ListBackups):len((*c.CallOptions).ListBackups)], opts...)
	it := &BackupIterator{}
	req = proto.Clone(req).(*filestorepb.ListBackupsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*filestorepb.Backup, string, error) {
		resp := &filestorepb.ListBackupsResponse{}
		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.cloudFilestoreManagerClient.ListBackups(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetBackups(), 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 *cloudFilestoreManagerGRPCClient) GetBackup(ctx context.Context, req *filestorepb.GetBackupRequest, opts ...gax.CallOption) (*filestorepb.Backup, 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", "name", url.QueryEscape(req.GetName())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).GetBackup[0:len((*c.CallOptions).GetBackup):len((*c.CallOptions).GetBackup)], opts...)
	var resp *filestorepb.Backup
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.cloudFilestoreManagerClient.GetBackup(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *cloudFilestoreManagerGRPCClient) CreateBackup(ctx context.Context, req *filestorepb.CreateBackupRequest, opts ...gax.CallOption) (*CreateBackupOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	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).CreateBackup[0:len((*c.CallOptions).CreateBackup):len((*c.CallOptions).CreateBackup)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.cloudFilestoreManagerClient.CreateBackup(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &CreateBackupOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *cloudFilestoreManagerGRPCClient) DeleteBackup(ctx context.Context, req *filestorepb.DeleteBackupRequest, opts ...gax.CallOption) (*DeleteBackupOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 600000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	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).DeleteBackup[0:len((*c.CallOptions).DeleteBackup):len((*c.CallOptions).DeleteBackup)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.cloudFilestoreManagerClient.DeleteBackup(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &DeleteBackupOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *cloudFilestoreManagerGRPCClient) UpdateBackup(ctx context.Context, req *filestorepb.UpdateBackupRequest, opts ...gax.CallOption) (*UpdateBackupOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 600000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "backup.name", url.QueryEscape(req.GetBackup().GetName())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).UpdateBackup[0:len((*c.CallOptions).UpdateBackup):len((*c.CallOptions).UpdateBackup)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.cloudFilestoreManagerClient.UpdateBackup(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &UpdateBackupOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

// BackupIterator manages a stream of *filestorepb.Backup.
type BackupIterator struct {
	items    []*filestorepb.Backup
	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 []*filestorepb.Backup, nextPageToken string, err error)
}

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

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

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

// InstanceIterator manages a stream of *filestorepb.Instance.
type InstanceIterator struct {
	items    []*filestorepb.Instance
	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 []*filestorepb.Instance, nextPageToken string, err error)
}

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

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

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