dataproc/apiv1/batch_controller_client.go - gocloud - Git at Google

 // Copyright 2022 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     https://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

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

 package dataproc

 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"
 	dataprocpb "google.golang.org/genproto/googleapis/cloud/dataproc/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/protobuf/proto"
 )

 var newBatchControllerClientHook clientHook

 // BatchControllerCallOptions contains the retry settings for each method of BatchControllerClient.
 type BatchControllerCallOptions struct {
 	CreateBatch []gax.CallOption
 	GetBatch    []gax.CallOption
 	ListBatches []gax.CallOption
 	DeleteBatch []gax.CallOption
 }

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

 func defaultBatchControllerCallOptions() *BatchControllerCallOptions {
 	return &BatchControllerCallOptions{
 		CreateBatch: []gax.CallOption{},
 		GetBatch:    []gax.CallOption{},
 		ListBatches: []gax.CallOption{},
 		DeleteBatch: []gax.CallOption{},
 	}
 }

 // internalBatchControllerClient is an interface that defines the methods availaible from Cloud Dataproc API.
 type internalBatchControllerClient interface {
 	Close() error
 	setGoogleClientInfo(...string)
 	Connection() *grpc.ClientConn
 	CreateBatch(context.Context, *dataprocpb.CreateBatchRequest, ...gax.CallOption) (*CreateBatchOperation, error)
 	CreateBatchOperation(name string) *CreateBatchOperation
 	GetBatch(context.Context, *dataprocpb.GetBatchRequest, ...gax.CallOption) (*dataprocpb.Batch, error)
 	ListBatches(context.Context, *dataprocpb.ListBatchesRequest, ...gax.CallOption) *BatchIterator
 	DeleteBatch(context.Context, *dataprocpb.DeleteBatchRequest, ...gax.CallOption) error
 }

 // BatchControllerClient is a client for interacting with Cloud Dataproc API.
 // Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
 //
 // The BatchController provides methods to manage batch workloads.
 type BatchControllerClient struct {
 	// The internal transport-dependent client.
 	internalClient internalBatchControllerClient

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

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

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

 // CreateBatch creates a batch workload that executes asynchronously.
 func (c *BatchControllerClient) CreateBatch(ctx context.Context, req *dataprocpb.CreateBatchRequest, opts ...gax.CallOption) (*CreateBatchOperation, error) {
 	return c.internalClient.CreateBatch(ctx, req, opts...)
 }

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

 // GetBatch gets the batch workload resource representation.
 func (c *BatchControllerClient) GetBatch(ctx context.Context, req *dataprocpb.GetBatchRequest, opts ...gax.CallOption) (*dataprocpb.Batch, error) {
 	return c.internalClient.GetBatch(ctx, req, opts...)
 }

 // ListBatches lists batch workloads.
 func (c *BatchControllerClient) ListBatches(ctx context.Context, req *dataprocpb.ListBatchesRequest, opts ...gax.CallOption) *BatchIterator {
 	return c.internalClient.ListBatches(ctx, req, opts...)
 }

 // DeleteBatch deletes the batch workload resource. If the batch is not in terminal state,
 // the delete fails and the response returns FAILED_PRECONDITION.
 func (c *BatchControllerClient) DeleteBatch(ctx context.Context, req *dataprocpb.DeleteBatchRequest, opts ...gax.CallOption) error {
 	return c.internalClient.DeleteBatch(ctx, req, opts...)
 }

 // batchControllerGRPCClient is a client for interacting with Cloud Dataproc API over gRPC transport.
 //
 // Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
 type batchControllerGRPCClient 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 BatchControllerClient
 	CallOptions **BatchControllerCallOptions

 	// The gRPC API client.
 	batchControllerClient dataprocpb.BatchControllerClient

 	// 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
 }

 // NewBatchControllerClient creates a new batch controller client based on gRPC.
 // The returned client must be Closed when it is done being used to clean up its underlying connections.
 //
 // The BatchController provides methods to manage batch workloads.
 func NewBatchControllerClient(ctx context.Context, opts ...option.ClientOption) (*BatchControllerClient, error) {
 	clientOpts := defaultBatchControllerGRPCClientOptions()
 	if newBatchControllerClientHook != nil {
 		hookOpts, err := newBatchControllerClientHook(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 := BatchControllerClient{CallOptions: defaultBatchControllerCallOptions()}

 	c := &batchControllerGRPCClient{
 		connPool:              connPool,
 		disableDeadlines:      disableDeadlines,
 		batchControllerClient: dataprocpb.NewBatchControllerClient(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 *batchControllerGRPCClient) 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 *batchControllerGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
 	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }

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

 func (c *batchControllerGRPCClient) CreateBatch(ctx context.Context, req *dataprocpb.CreateBatchRequest, opts ...gax.CallOption) (*CreateBatchOperation, error) {
 	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).CreateBatch[0:len((*c.CallOptions).CreateBatch):len((*c.CallOptions).CreateBatch)], opts...)
 	var resp *longrunningpb.Operation
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 		var err error
 		resp, err = c.batchControllerClient.CreateBatch(ctx, req, settings.GRPC...)
 		return err
 	}, opts...)
 	if err != nil {
 		return nil, err
 	}
 	return &CreateBatchOperation{
 		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
 	}, nil
 }

 func (c *batchControllerGRPCClient) GetBatch(ctx context.Context, req *dataprocpb.GetBatchRequest, opts ...gax.CallOption) (*dataprocpb.Batch, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))

 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetBatch[0:len((*c.CallOptions).GetBatch):len((*c.CallOptions).GetBatch)], opts...)
 	var resp *dataprocpb.Batch
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 		var err error
 		resp, err = c.batchControllerClient.GetBatch(ctx, req, settings.GRPC...)
 		return err
 	}, opts...)
 	if err != nil {
 		return nil, err
 	}
 	return resp, nil
 }

 func (c *batchControllerGRPCClient) ListBatches(ctx context.Context, req *dataprocpb.ListBatchesRequest, opts ...gax.CallOption) *BatchIterator {
 	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).ListBatches[0:len((*c.CallOptions).ListBatches):len((*c.CallOptions).ListBatches)], opts...)
 	it := &BatchIterator{}
 	req = proto.Clone(req).(*dataprocpb.ListBatchesRequest)
 	it.InternalFetch = func(pageSize int, pageToken string) ([]*dataprocpb.Batch, string, error) {
 		resp := &dataprocpb.ListBatchesResponse{}
 		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.batchControllerClient.ListBatches(ctx, req, settings.GRPC...)
 			return err
 		}, opts...)
 		if err != nil {
 			return nil, "", err
 		}

 		it.Response = resp
 		return resp.GetBatches(), 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 *batchControllerGRPCClient) DeleteBatch(ctx context.Context, req *dataprocpb.DeleteBatchRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))

 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteBatch[0:len((*c.CallOptions).DeleteBatch):len((*c.CallOptions).DeleteBatch)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 		var err error
 		_, err = c.batchControllerClient.DeleteBatch(ctx, req, settings.GRPC...)
 		return err
 	}, opts...)
 	return err
 }

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

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

 // BatchIterator manages a stream of *dataprocpb.Batch.
 type BatchIterator struct {
 	items    []*dataprocpb.Batch
 	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 []*dataprocpb.Batch, nextPageToken string, err error)
 }

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

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

 func (it *BatchIterator) takeBuf() interface{} {
 	b := it.items
 	it.items = nil
 	return b
 }
	// Copyright 2022 Google LLC
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// https://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

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

	package dataproc

	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"
	dataprocpb "google.golang.org/genproto/googleapis/cloud/dataproc/v1"
	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
	"google.golang.org/grpc"
	"google.golang.org/grpc/metadata"
	"google.golang.org/protobuf/proto"
	)

	var newBatchControllerClientHook clientHook

	// BatchControllerCallOptions contains the retry settings for each method of BatchControllerClient.
	type BatchControllerCallOptions struct {
	CreateBatch []gax.CallOption
	GetBatch []gax.CallOption
	ListBatches []gax.CallOption
	DeleteBatch []gax.CallOption
	}

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

	func defaultBatchControllerCallOptions() *BatchControllerCallOptions {
	return &BatchControllerCallOptions{
	CreateBatch: []gax.CallOption{},
	GetBatch: []gax.CallOption{},
	ListBatches: []gax.CallOption{},
	DeleteBatch: []gax.CallOption{},
	}
	}

	// internalBatchControllerClient is an interface that defines the methods availaible from Cloud Dataproc API.
	type internalBatchControllerClient interface {
	Close() error
	setGoogleClientInfo(...string)
	Connection() *grpc.ClientConn
	CreateBatch(context.Context, dataprocpb.CreateBatchRequest, ...gax.CallOption) (CreateBatchOperation, error)
	CreateBatchOperation(name string) *CreateBatchOperation
	GetBatch(context.Context, dataprocpb.GetBatchRequest, ...gax.CallOption) (dataprocpb.Batch, error)
	ListBatches(context.Context, dataprocpb.ListBatchesRequest, ...gax.CallOption) BatchIterator
	DeleteBatch(context.Context, *dataprocpb.DeleteBatchRequest, ...gax.CallOption) error
	}

	// BatchControllerClient is a client for interacting with Cloud Dataproc API.
	// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
	//
	// The BatchController provides methods to manage batch workloads.
	type BatchControllerClient struct {
	// The internal transport-dependent client.
	internalClient internalBatchControllerClient

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

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

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

	// CreateBatch creates a batch workload that executes asynchronously.
	func (c BatchControllerClient) CreateBatch(ctx context.Context, req dataprocpb.CreateBatchRequest, opts ...gax.CallOption) (*CreateBatchOperation, error) {
	return c.internalClient.CreateBatch(ctx, req, opts...)
	}

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

	// GetBatch gets the batch workload resource representation.
	func (c BatchControllerClient) GetBatch(ctx context.Context, req dataprocpb.GetBatchRequest, opts ...gax.CallOption) (*dataprocpb.Batch, error) {
	return c.internalClient.GetBatch(ctx, req, opts...)
	}

	// ListBatches lists batch workloads.
	func (c BatchControllerClient) ListBatches(ctx context.Context, req dataprocpb.ListBatchesRequest, opts ...gax.CallOption) *BatchIterator {
	return c.internalClient.ListBatches(ctx, req, opts...)
	}

	// DeleteBatch deletes the batch workload resource. If the batch is not in terminal state,
	// the delete fails and the response returns FAILED_PRECONDITION.
	func (c BatchControllerClient) DeleteBatch(ctx context.Context, req dataprocpb.DeleteBatchRequest, opts ...gax.CallOption) error {
	return c.internalClient.DeleteBatch(ctx, req, opts...)
	}

	// batchControllerGRPCClient is a client for interacting with Cloud Dataproc API over gRPC transport.
	//
	// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
	type batchControllerGRPCClient 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 BatchControllerClient
	CallOptions **BatchControllerCallOptions

	// The gRPC API client.
	batchControllerClient dataprocpb.BatchControllerClient

	// 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
	}

	// NewBatchControllerClient creates a new batch controller client based on gRPC.
	// The returned client must be Closed when it is done being used to clean up its underlying connections.
	//
	// The BatchController provides methods to manage batch workloads.
	func NewBatchControllerClient(ctx context.Context, opts ...option.ClientOption) (*BatchControllerClient, error) {
	clientOpts := defaultBatchControllerGRPCClientOptions()
	if newBatchControllerClientHook != nil {
	hookOpts, err := newBatchControllerClientHook(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 := BatchControllerClient{CallOptions: defaultBatchControllerCallOptions()}

	c := &batchControllerGRPCClient{
	connPool: connPool,
	disableDeadlines: disableDeadlines,
	batchControllerClient: dataprocpb.NewBatchControllerClient(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 batchControllerGRPCClient) 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 *batchControllerGRPCClient) setGoogleClientInfo(keyval ...string) {
	kv := append([]string{"gl-go", versionGo()}, keyval...)
	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
	}

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

	func (c batchControllerGRPCClient) CreateBatch(ctx context.Context, req dataprocpb.CreateBatchRequest, opts ...gax.CallOption) (*CreateBatchOperation, error) {
	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).CreateBatch[0:len((c.CallOptions).CreateBatch):len((*c.CallOptions).CreateBatch)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	resp, err = c.batchControllerClient.CreateBatch(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, err
	}
	return &CreateBatchOperation{
	lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
	}

	func (c batchControllerGRPCClient) GetBatch(ctx context.Context, req dataprocpb.GetBatchRequest, opts ...gax.CallOption) (*dataprocpb.Batch, error) {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((c.CallOptions).GetBatch[0:len((c.CallOptions).GetBatch):len((*c.CallOptions).GetBatch)], opts...)
	var resp *dataprocpb.Batch
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	resp, err = c.batchControllerClient.GetBatch(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, err
	}
	return resp, nil
	}

	func (c batchControllerGRPCClient) ListBatches(ctx context.Context, req dataprocpb.ListBatchesRequest, opts ...gax.CallOption) *BatchIterator {
	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).ListBatches[0:len((c.CallOptions).ListBatches):len((*c.CallOptions).ListBatches)], opts...)
	it := &BatchIterator{}
	req = proto.Clone(req).(*dataprocpb.ListBatchesRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*dataprocpb.Batch, string, error) {
	resp := &dataprocpb.ListBatchesResponse{}
	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.batchControllerClient.ListBatches(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, "", err
	}

	it.Response = resp
	return resp.GetBatches(), 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 batchControllerGRPCClient) DeleteBatch(ctx context.Context, req dataprocpb.DeleteBatchRequest, opts ...gax.CallOption) error {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((c.CallOptions).DeleteBatch[0:len((c.CallOptions).DeleteBatch):len((*c.CallOptions).DeleteBatch)], opts...)
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	_, err = c.batchControllerClient.DeleteBatch(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	return err
	}

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

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

	// BatchIterator manages a stream of *dataprocpb.Batch.
	type BatchIterator struct {
	items []*dataprocpb.Batch
	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 []*dataprocpb.Batch, nextPageToken string, err error)
	}

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

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

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