pubsub/apiv1/schema_client.go - gocloud - Git at Google

 // Copyright 2021 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     https://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

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

 package pubsub

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

 	"github.com/golang/protobuf/proto"
 	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"
 	pubsubpb "google.golang.org/genproto/googleapis/pubsub/v1"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/metadata"
 )

 var newSchemaClientHook clientHook

 // SchemaCallOptions contains the retry settings for each method of SchemaClient.
 type SchemaCallOptions struct {
 	CreateSchema    []gax.CallOption
 	GetSchema       []gax.CallOption
 	ListSchemas     []gax.CallOption
 	DeleteSchema    []gax.CallOption
 	ValidateSchema  []gax.CallOption
 	ValidateMessage []gax.CallOption
 }

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

 func defaultSchemaCallOptions() *SchemaCallOptions {
 	return &SchemaCallOptions{
 		CreateSchema:    []gax.CallOption{},
 		GetSchema:       []gax.CallOption{},
 		ListSchemas:     []gax.CallOption{},
 		DeleteSchema:    []gax.CallOption{},
 		ValidateSchema:  []gax.CallOption{},
 		ValidateMessage: []gax.CallOption{},
 	}
 }

 // SchemaClient is a client for interacting with Cloud Pub/Sub API.
 //
 // Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
 type SchemaClient 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.
 	schemaClient pubsubpb.SchemaServiceClient

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

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

 // NewSchemaClient creates a new schema service client.
 //
 func NewSchemaClient(ctx context.Context, opts ...option.ClientOption) (*SchemaClient, error) {
 	clientOpts := defaultSchemaClientOptions()

 	if newSchemaClientHook != nil {
 		hookOpts, err := newSchemaClientHook(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 := &SchemaClient{
 		connPool:         connPool,
 		disableDeadlines: disableDeadlines,
 		CallOptions:      defaultSchemaCallOptions(),

 		schemaClient: pubsubpb.NewSchemaServiceClient(connPool),
 	}
 	c.setGoogleClientInfo()

 	return c, nil
 }

 // Connection returns a connection to the API service.
 //
 // Deprecated.
 func (c *SchemaClient) 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 *SchemaClient) 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 *SchemaClient) 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...))
 }

 // CreateSchema creates a schema.
 func (c *SchemaClient) CreateSchema(ctx context.Context, req *pubsubpb.CreateSchemaRequest, opts ...gax.CallOption) (*pubsubpb.Schema, 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.CreateSchema[0:len(c.CallOptions.CreateSchema):len(c.CallOptions.CreateSchema)], opts...)
 	var resp *pubsubpb.Schema
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 		var err error
 		resp, err = c.schemaClient.CreateSchema(ctx, req, settings.GRPC...)
 		return err
 	}, opts...)
 	if err != nil {
 		return nil, err
 	}
 	return resp, nil
 }

 // GetSchema gets a schema.
 func (c *SchemaClient) GetSchema(ctx context.Context, req *pubsubpb.GetSchemaRequest, opts ...gax.CallOption) (*pubsubpb.Schema, 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.GetSchema[0:len(c.CallOptions.GetSchema):len(c.CallOptions.GetSchema)], opts...)
 	var resp *pubsubpb.Schema
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 		var err error
 		resp, err = c.schemaClient.GetSchema(ctx, req, settings.GRPC...)
 		return err
 	}, opts...)
 	if err != nil {
 		return nil, err
 	}
 	return resp, nil
 }

 // ListSchemas lists schemas in a project.
 func (c *SchemaClient) ListSchemas(ctx context.Context, req *pubsubpb.ListSchemasRequest, opts ...gax.CallOption) *SchemaIterator {
 	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.ListSchemas[0:len(c.CallOptions.ListSchemas):len(c.CallOptions.ListSchemas)], opts...)
 	it := &SchemaIterator{}
 	req = proto.Clone(req).(*pubsubpb.ListSchemasRequest)
 	it.InternalFetch = func(pageSize int, pageToken string) ([]*pubsubpb.Schema, string, error) {
 		var resp *pubsubpb.ListSchemasResponse
 		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.schemaClient.ListSchemas(ctx, req, settings.GRPC...)
 			return err
 		}, opts...)
 		if err != nil {
 			return nil, "", err
 		}

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

 // DeleteSchema deletes a schema.
 func (c *SchemaClient) DeleteSchema(ctx context.Context, req *pubsubpb.DeleteSchemaRequest, 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.DeleteSchema[0:len(c.CallOptions.DeleteSchema):len(c.CallOptions.DeleteSchema)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 		var err error
 		_, err = c.schemaClient.DeleteSchema(ctx, req, settings.GRPC...)
 		return err
 	}, opts...)
 	return err
 }

 // ValidateSchema validates a schema.
 func (c *SchemaClient) ValidateSchema(ctx context.Context, req *pubsubpb.ValidateSchemaRequest, opts ...gax.CallOption) (*pubsubpb.ValidateSchemaResponse, 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.ValidateSchema[0:len(c.CallOptions.ValidateSchema):len(c.CallOptions.ValidateSchema)], opts...)
 	var resp *pubsubpb.ValidateSchemaResponse
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 		var err error
 		resp, err = c.schemaClient.ValidateSchema(ctx, req, settings.GRPC...)
 		return err
 	}, opts...)
 	if err != nil {
 		return nil, err
 	}
 	return resp, nil
 }

 // ValidateMessage validates a message against a schema.
 func (c *SchemaClient) ValidateMessage(ctx context.Context, req *pubsubpb.ValidateMessageRequest, opts ...gax.CallOption) (*pubsubpb.ValidateMessageResponse, 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.ValidateMessage[0:len(c.CallOptions.ValidateMessage):len(c.CallOptions.ValidateMessage)], opts...)
 	var resp *pubsubpb.ValidateMessageResponse
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 		var err error
 		resp, err = c.schemaClient.ValidateMessage(ctx, req, settings.GRPC...)
 		return err
 	}, opts...)
 	if err != nil {
 		return nil, err
 	}
 	return resp, nil
 }

 // SchemaIterator manages a stream of *pubsubpb.Schema.
 type SchemaIterator struct {
 	items    []*pubsubpb.Schema
 	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 []*pubsubpb.Schema, nextPageToken string, err error)
 }

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

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

 func (it *SchemaIterator) takeBuf() interface{} {
 	b := it.items
 	it.items = nil
 	return b
 }
	// Copyright 2021 Google LLC
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// https://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

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

	package pubsub

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

	"github.com/golang/protobuf/proto"
	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"
	pubsubpb "google.golang.org/genproto/googleapis/pubsub/v1"
	"google.golang.org/grpc"
	"google.golang.org/grpc/metadata"
	)

	var newSchemaClientHook clientHook

	// SchemaCallOptions contains the retry settings for each method of SchemaClient.
	type SchemaCallOptions struct {
	CreateSchema []gax.CallOption
	GetSchema []gax.CallOption
	ListSchemas []gax.CallOption
	DeleteSchema []gax.CallOption
	ValidateSchema []gax.CallOption
	ValidateMessage []gax.CallOption
	}

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

	func defaultSchemaCallOptions() *SchemaCallOptions {
	return &SchemaCallOptions{
	CreateSchema: []gax.CallOption{},
	GetSchema: []gax.CallOption{},
	ListSchemas: []gax.CallOption{},
	DeleteSchema: []gax.CallOption{},
	ValidateSchema: []gax.CallOption{},
	ValidateMessage: []gax.CallOption{},
	}
	}

	// SchemaClient is a client for interacting with Cloud Pub/Sub API.
	//
	// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
	type SchemaClient 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.
	schemaClient pubsubpb.SchemaServiceClient

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

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

	// NewSchemaClient creates a new schema service client.
	//
	func NewSchemaClient(ctx context.Context, opts ...option.ClientOption) (*SchemaClient, error) {
	clientOpts := defaultSchemaClientOptions()

	if newSchemaClientHook != nil {
	hookOpts, err := newSchemaClientHook(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 := &SchemaClient{
	connPool: connPool,
	disableDeadlines: disableDeadlines,
	CallOptions: defaultSchemaCallOptions(),

	schemaClient: pubsubpb.NewSchemaServiceClient(connPool),
	}
	c.setGoogleClientInfo()

	return c, nil
	}

	// Connection returns a connection to the API service.
	//
	// Deprecated.
	func (c SchemaClient) 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 *SchemaClient) 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 *SchemaClient) 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...))
	}

	// CreateSchema creates a schema.
	func (c SchemaClient) CreateSchema(ctx context.Context, req pubsubpb.CreateSchemaRequest, opts ...gax.CallOption) (*pubsubpb.Schema, 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.CreateSchema[0:len(c.CallOptions.CreateSchema):len(c.CallOptions.CreateSchema)], opts...)
	var resp *pubsubpb.Schema
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	resp, err = c.schemaClient.CreateSchema(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, err
	}
	return resp, nil
	}

	// GetSchema gets a schema.
	func (c SchemaClient) GetSchema(ctx context.Context, req pubsubpb.GetSchemaRequest, opts ...gax.CallOption) (*pubsubpb.Schema, 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.GetSchema[0:len(c.CallOptions.GetSchema):len(c.CallOptions.GetSchema)], opts...)
	var resp *pubsubpb.Schema
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	resp, err = c.schemaClient.GetSchema(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, err
	}
	return resp, nil
	}

	// ListSchemas lists schemas in a project.
	func (c SchemaClient) ListSchemas(ctx context.Context, req pubsubpb.ListSchemasRequest, opts ...gax.CallOption) *SchemaIterator {
	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.ListSchemas[0:len(c.CallOptions.ListSchemas):len(c.CallOptions.ListSchemas)], opts...)
	it := &SchemaIterator{}
	req = proto.Clone(req).(*pubsubpb.ListSchemasRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*pubsubpb.Schema, string, error) {
	var resp *pubsubpb.ListSchemasResponse
	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.schemaClient.ListSchemas(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, "", err
	}

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

	// DeleteSchema deletes a schema.
	func (c SchemaClient) DeleteSchema(ctx context.Context, req pubsubpb.DeleteSchemaRequest, 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.DeleteSchema[0:len(c.CallOptions.DeleteSchema):len(c.CallOptions.DeleteSchema)], opts...)
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	_, err = c.schemaClient.DeleteSchema(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	return err
	}

	// ValidateSchema validates a schema.
	func (c SchemaClient) ValidateSchema(ctx context.Context, req pubsubpb.ValidateSchemaRequest, opts ...gax.CallOption) (*pubsubpb.ValidateSchemaResponse, 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.ValidateSchema[0:len(c.CallOptions.ValidateSchema):len(c.CallOptions.ValidateSchema)], opts...)
	var resp *pubsubpb.ValidateSchemaResponse
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	resp, err = c.schemaClient.ValidateSchema(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, err
	}
	return resp, nil
	}

	// ValidateMessage validates a message against a schema.
	func (c SchemaClient) ValidateMessage(ctx context.Context, req pubsubpb.ValidateMessageRequest, opts ...gax.CallOption) (*pubsubpb.ValidateMessageResponse, 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.ValidateMessage[0:len(c.CallOptions.ValidateMessage):len(c.CallOptions.ValidateMessage)], opts...)
	var resp *pubsubpb.ValidateMessageResponse
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	resp, err = c.schemaClient.ValidateMessage(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, err
	}
	return resp, nil
	}

	// SchemaIterator manages a stream of *pubsubpb.Schema.
	type SchemaIterator struct {
	items []*pubsubpb.Schema
	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 []*pubsubpb.Schema, nextPageToken string, err error)
	}

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

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

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