monitoring/apiv3/group_client.go - third_party/github.com/googleapis/google-cloud-go - Git at Google

 // Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     https://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

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

 package monitoring

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

 	"cloud.google.com/go/monitoring/apiv3/v2/monitoringpb"
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
 	gtransport "google.golang.org/api/transport/grpc"
 	monitoredrespb "google.golang.org/genproto/googleapis/api/monitoredres"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/protobuf/proto"
 )

 var newGroupClientHook clientHook

 // GroupCallOptions contains the retry settings for each method of GroupClient.
 type GroupCallOptions struct {
 	ListGroups       []gax.CallOption
 	GetGroup         []gax.CallOption
 	CreateGroup      []gax.CallOption
 	UpdateGroup      []gax.CallOption
 	DeleteGroup      []gax.CallOption
 	ListGroupMembers []gax.CallOption
 }

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

 func defaultGroupCallOptions() *GroupCallOptions {
 	return &GroupCallOptions{
 		ListGroups: []gax.CallOption{
 			gax.WithRetry(func() gax.Retryer {
 				return gax.OnCodes([]codes.Code{
 					codes.DeadlineExceeded,
 					codes.Unavailable,
 				}, gax.Backoff{
 					Initial:    100 * time.Millisecond,
 					Max:        30000 * time.Millisecond,
 					Multiplier: 1.30,
 				})
 			}),
 		},
 		GetGroup: []gax.CallOption{
 			gax.WithRetry(func() gax.Retryer {
 				return gax.OnCodes([]codes.Code{
 					codes.DeadlineExceeded,
 					codes.Unavailable,
 				}, gax.Backoff{
 					Initial:    100 * time.Millisecond,
 					Max:        30000 * time.Millisecond,
 					Multiplier: 1.30,
 				})
 			}),
 		},
 		CreateGroup: []gax.CallOption{},
 		UpdateGroup: []gax.CallOption{
 			gax.WithRetry(func() gax.Retryer {
 				return gax.OnCodes([]codes.Code{
 					codes.DeadlineExceeded,
 					codes.Unavailable,
 				}, gax.Backoff{
 					Initial:    100 * time.Millisecond,
 					Max:        30000 * time.Millisecond,
 					Multiplier: 1.30,
 				})
 			}),
 		},
 		DeleteGroup: []gax.CallOption{
 			gax.WithRetry(func() gax.Retryer {
 				return gax.OnCodes([]codes.Code{
 					codes.DeadlineExceeded,
 					codes.Unavailable,
 				}, gax.Backoff{
 					Initial:    100 * time.Millisecond,
 					Max:        30000 * time.Millisecond,
 					Multiplier: 1.30,
 				})
 			}),
 		},
 		ListGroupMembers: []gax.CallOption{
 			gax.WithRetry(func() gax.Retryer {
 				return gax.OnCodes([]codes.Code{
 					codes.DeadlineExceeded,
 					codes.Unavailable,
 				}, gax.Backoff{
 					Initial:    100 * time.Millisecond,
 					Max:        30000 * time.Millisecond,
 					Multiplier: 1.30,
 				})
 			}),
 		},
 	}
 }

 // GroupClient is a client for interacting with Cloud Monitoring API.
 //
 // Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
 type GroupClient struct {
 	// Connection pool of gRPC connections to the service.
 	connPool gtransport.ConnPool

 	// The gRPC API client.
 	groupClient monitoringpb.GroupServiceClient

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

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

 // NewGroupClient creates a new group service client.
 //
 // The Group API lets you inspect and manage your
 // groups (at #google.monitoring.v3.Group).
 //
 // A group is a named filter that is used to identify
 // a collection of monitored resources. Groups are typically used to
 // mirror the physical and/or logical topology of the environment.
 // Because group membership is computed dynamically, monitored
 // resources that are started in the future are automatically placed
 // in matching groups. By using a group to name monitored resources in,
 // for example, an alert policy, the target of that alert policy is
 // updated automatically as monitored resources are added and removed
 // from the infrastructure.
 func NewGroupClient(ctx context.Context, opts ...option.ClientOption) (*GroupClient, error) {
 	clientOpts := defaultGroupClientOptions()

 	if newGroupClientHook != nil {
 		hookOpts, err := newGroupClientHook(ctx, clientHookParams{})
 		if err != nil {
 			return nil, err
 		}
 		clientOpts = append(clientOpts, hookOpts...)
 	}

 	connPool, err := gtransport.DialPool(ctx, append(clientOpts, opts...)...)
 	if err != nil {
 		return nil, err
 	}
 	c := &GroupClient{
 		connPool:    connPool,
 		CallOptions: defaultGroupCallOptions(),

 		groupClient: monitoringpb.NewGroupServiceClient(connPool),
 	}
 	c.setGoogleClientInfo()

 	return c, nil
 }

 // Connection returns a connection to the API service.
 //
 // Deprecated.
 func (c *GroupClient) 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 *GroupClient) 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 *GroupClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", gax.GoVersion}, keyval...)
 	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }

 // ListGroups lists the existing groups.
 func (c *GroupClient) ListGroups(ctx context.Context, req *monitoringpb.ListGroupsRequest, opts ...gax.CallOption) *GroupIterator {
 	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.ListGroups[0:len(c.CallOptions.ListGroups):len(c.CallOptions.ListGroups)], opts...)
 	it := &GroupIterator{}
 	req = proto.Clone(req).(*monitoringpb.ListGroupsRequest)
 	it.InternalFetch = func(pageSize int, pageToken string) ([]*monitoringpb.Group, string, error) {
 		var resp *monitoringpb.ListGroupsResponse
 		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.groupClient.ListGroups(ctx, req, settings.GRPC...)
 			return err
 		}, opts...)
 		if err != nil {
 			return nil, "", err
 		}

 		it.Response = resp
 		return resp.Group, resp.NextPageToken, 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.PageSize)
 	it.pageInfo.Token = req.PageToken
 	return it
 }

 // GetGroup gets a single group.
 func (c *GroupClient) GetGroup(ctx context.Context, req *monitoringpb.GetGroupRequest, opts ...gax.CallOption) (*monitoringpb.Group, 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.GetGroup[0:len(c.CallOptions.GetGroup):len(c.CallOptions.GetGroup)], opts...)
 	var resp *monitoringpb.Group
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 		var err error
 		resp, err = c.groupClient.GetGroup(ctx, req, settings.GRPC...)
 		return err
 	}, opts...)
 	if err != nil {
 		return nil, err
 	}
 	return resp, nil
 }

 // CreateGroup creates a new group.
 func (c *GroupClient) CreateGroup(ctx context.Context, req *monitoringpb.CreateGroupRequest, opts ...gax.CallOption) (*monitoringpb.Group, 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.CreateGroup[0:len(c.CallOptions.CreateGroup):len(c.CallOptions.CreateGroup)], opts...)
 	var resp *monitoringpb.Group
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 		var err error
 		resp, err = c.groupClient.CreateGroup(ctx, req, settings.GRPC...)
 		return err
 	}, opts...)
 	if err != nil {
 		return nil, err
 	}
 	return resp, nil
 }

 // UpdateGroup updates an existing group.
 // You can change any group attributes except name.
 func (c *GroupClient) UpdateGroup(ctx context.Context, req *monitoringpb.UpdateGroupRequest, opts ...gax.CallOption) (*monitoringpb.Group, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "group.name", url.QueryEscape(req.GetGroup().GetName())))
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append(c.CallOptions.UpdateGroup[0:len(c.CallOptions.UpdateGroup):len(c.CallOptions.UpdateGroup)], opts...)
 	var resp *monitoringpb.Group
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 		var err error
 		resp, err = c.groupClient.UpdateGroup(ctx, req, settings.GRPC...)
 		return err
 	}, opts...)
 	if err != nil {
 		return nil, err
 	}
 	return resp, nil
 }

 // DeleteGroup deletes an existing group.
 func (c *GroupClient) DeleteGroup(ctx context.Context, req *monitoringpb.DeleteGroupRequest, 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.DeleteGroup[0:len(c.CallOptions.DeleteGroup):len(c.CallOptions.DeleteGroup)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
 		var err error
 		_, err = c.groupClient.DeleteGroup(ctx, req, settings.GRPC...)
 		return err
 	}, opts...)
 	return err
 }

 // ListGroupMembers lists the monitored resources that are members of a group.
 func (c *GroupClient) ListGroupMembers(ctx context.Context, req *monitoringpb.ListGroupMembersRequest, opts ...gax.CallOption) *MonitoredResourceIterator {
 	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.ListGroupMembers[0:len(c.CallOptions.ListGroupMembers):len(c.CallOptions.ListGroupMembers)], opts...)
 	it := &MonitoredResourceIterator{}
 	req = proto.Clone(req).(*monitoringpb.ListGroupMembersRequest)
 	it.InternalFetch = func(pageSize int, pageToken string) ([]*monitoredrespb.MonitoredResource, string, error) {
 		var resp *monitoringpb.ListGroupMembersResponse
 		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.groupClient.ListGroupMembers(ctx, req, settings.GRPC...)
 			return err
 		}, opts...)
 		if err != nil {
 			return nil, "", err
 		}

 		it.Response = resp
 		return resp.Members, resp.NextPageToken, 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.PageSize)
 	it.pageInfo.Token = req.PageToken
 	return it
 }

 // GroupIterator manages a stream of *monitoringpb.Group.
 type GroupIterator struct {
 	items    []*monitoringpb.Group
 	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 []*monitoringpb.Group, nextPageToken string, err error)
 }

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

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

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

 // MonitoredResourceIterator manages a stream of *monitoredrespb.MonitoredResource.
 type MonitoredResourceIterator struct {
 	items    []*monitoredrespb.MonitoredResource
 	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 []*monitoredrespb.MonitoredResource, nextPageToken string, err error)
 }

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

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

 func (it *MonitoredResourceIterator) takeBuf() interface{} {
 	b := it.items
 	it.items = nil
 	return b
 }
	// Copyright 2020 Google LLC
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// https://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

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

	package monitoring

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

	"cloud.google.com/go/monitoring/apiv3/v2/monitoringpb"
	gax "github.com/googleapis/gax-go/v2"
	"google.golang.org/api/iterator"
	"google.golang.org/api/option"
	gtransport "google.golang.org/api/transport/grpc"
	monitoredrespb "google.golang.org/genproto/googleapis/api/monitoredres"
	"google.golang.org/grpc"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/metadata"
	"google.golang.org/protobuf/proto"
	)

	var newGroupClientHook clientHook

	// GroupCallOptions contains the retry settings for each method of GroupClient.
	type GroupCallOptions struct {
	ListGroups []gax.CallOption
	GetGroup []gax.CallOption
	CreateGroup []gax.CallOption
	UpdateGroup []gax.CallOption
	DeleteGroup []gax.CallOption
	ListGroupMembers []gax.CallOption
	}

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

	func defaultGroupCallOptions() *GroupCallOptions {
	return &GroupCallOptions{
	ListGroups: []gax.CallOption{
	gax.WithRetry(func() gax.Retryer {
	return gax.OnCodes([]codes.Code{
	codes.DeadlineExceeded,
	codes.Unavailable,
	}, gax.Backoff{
	Initial: 100 * time.Millisecond,
	Max: 30000 * time.Millisecond,
	Multiplier: 1.30,
	})
	}),
	},
	GetGroup: []gax.CallOption{
	gax.WithRetry(func() gax.Retryer {
	return gax.OnCodes([]codes.Code{
	codes.DeadlineExceeded,
	codes.Unavailable,
	}, gax.Backoff{
	Initial: 100 * time.Millisecond,
	Max: 30000 * time.Millisecond,
	Multiplier: 1.30,
	})
	}),
	},
	CreateGroup: []gax.CallOption{},
	UpdateGroup: []gax.CallOption{
	gax.WithRetry(func() gax.Retryer {
	return gax.OnCodes([]codes.Code{
	codes.DeadlineExceeded,
	codes.Unavailable,
	}, gax.Backoff{
	Initial: 100 * time.Millisecond,
	Max: 30000 * time.Millisecond,
	Multiplier: 1.30,
	})
	}),
	},
	DeleteGroup: []gax.CallOption{
	gax.WithRetry(func() gax.Retryer {
	return gax.OnCodes([]codes.Code{
	codes.DeadlineExceeded,
	codes.Unavailable,
	}, gax.Backoff{
	Initial: 100 * time.Millisecond,
	Max: 30000 * time.Millisecond,
	Multiplier: 1.30,
	})
	}),
	},
	ListGroupMembers: []gax.CallOption{
	gax.WithRetry(func() gax.Retryer {
	return gax.OnCodes([]codes.Code{
	codes.DeadlineExceeded,
	codes.Unavailable,
	}, gax.Backoff{
	Initial: 100 * time.Millisecond,
	Max: 30000 * time.Millisecond,
	Multiplier: 1.30,
	})
	}),
	},
	}
	}

	// GroupClient is a client for interacting with Cloud Monitoring API.
	//
	// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
	type GroupClient struct {
	// Connection pool of gRPC connections to the service.
	connPool gtransport.ConnPool

	// The gRPC API client.
	groupClient monitoringpb.GroupServiceClient

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

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

	// NewGroupClient creates a new group service client.
	//
	// The Group API lets you inspect and manage your
	// groups (at #google.monitoring.v3.Group).
	//
	// A group is a named filter that is used to identify
	// a collection of monitored resources. Groups are typically used to
	// mirror the physical and/or logical topology of the environment.
	// Because group membership is computed dynamically, monitored
	// resources that are started in the future are automatically placed
	// in matching groups. By using a group to name monitored resources in,
	// for example, an alert policy, the target of that alert policy is
	// updated automatically as monitored resources are added and removed
	// from the infrastructure.
	func NewGroupClient(ctx context.Context, opts ...option.ClientOption) (*GroupClient, error) {
	clientOpts := defaultGroupClientOptions()

	if newGroupClientHook != nil {
	hookOpts, err := newGroupClientHook(ctx, clientHookParams{})
	if err != nil {
	return nil, err
	}
	clientOpts = append(clientOpts, hookOpts...)
	}

	connPool, err := gtransport.DialPool(ctx, append(clientOpts, opts...)...)
	if err != nil {
	return nil, err
	}
	c := &GroupClient{
	connPool: connPool,
	CallOptions: defaultGroupCallOptions(),

	groupClient: monitoringpb.NewGroupServiceClient(connPool),
	}
	c.setGoogleClientInfo()

	return c, nil
	}

	// Connection returns a connection to the API service.
	//
	// Deprecated.
	func (c GroupClient) 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 *GroupClient) 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 *GroupClient) setGoogleClientInfo(keyval ...string) {
	kv := append([]string{"gl-go", gax.GoVersion}, keyval...)
	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
	}

	// ListGroups lists the existing groups.
	func (c GroupClient) ListGroups(ctx context.Context, req monitoringpb.ListGroupsRequest, opts ...gax.CallOption) *GroupIterator {
	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.ListGroups[0:len(c.CallOptions.ListGroups):len(c.CallOptions.ListGroups)], opts...)
	it := &GroupIterator{}
	req = proto.Clone(req).(*monitoringpb.ListGroupsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*monitoringpb.Group, string, error) {
	var resp *monitoringpb.ListGroupsResponse
	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.groupClient.ListGroups(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, "", err
	}

	it.Response = resp
	return resp.Group, resp.NextPageToken, 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.PageSize)
	it.pageInfo.Token = req.PageToken
	return it
	}

	// GetGroup gets a single group.
	func (c GroupClient) GetGroup(ctx context.Context, req monitoringpb.GetGroupRequest, opts ...gax.CallOption) (*monitoringpb.Group, 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.GetGroup[0:len(c.CallOptions.GetGroup):len(c.CallOptions.GetGroup)], opts...)
	var resp *monitoringpb.Group
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	resp, err = c.groupClient.GetGroup(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, err
	}
	return resp, nil
	}

	// CreateGroup creates a new group.
	func (c GroupClient) CreateGroup(ctx context.Context, req monitoringpb.CreateGroupRequest, opts ...gax.CallOption) (*monitoringpb.Group, 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.CreateGroup[0:len(c.CallOptions.CreateGroup):len(c.CallOptions.CreateGroup)], opts...)
	var resp *monitoringpb.Group
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	resp, err = c.groupClient.CreateGroup(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, err
	}
	return resp, nil
	}

	// UpdateGroup updates an existing group.
	// You can change any group attributes except name.
	func (c GroupClient) UpdateGroup(ctx context.Context, req monitoringpb.UpdateGroupRequest, opts ...gax.CallOption) (*monitoringpb.Group, error) {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "group.name", url.QueryEscape(req.GetGroup().GetName())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append(c.CallOptions.UpdateGroup[0:len(c.CallOptions.UpdateGroup):len(c.CallOptions.UpdateGroup)], opts...)
	var resp *monitoringpb.Group
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	resp, err = c.groupClient.UpdateGroup(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, err
	}
	return resp, nil
	}

	// DeleteGroup deletes an existing group.
	func (c GroupClient) DeleteGroup(ctx context.Context, req monitoringpb.DeleteGroupRequest, 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.DeleteGroup[0:len(c.CallOptions.DeleteGroup):len(c.CallOptions.DeleteGroup)], opts...)
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
	var err error
	_, err = c.groupClient.DeleteGroup(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	return err
	}

	// ListGroupMembers lists the monitored resources that are members of a group.
	func (c GroupClient) ListGroupMembers(ctx context.Context, req monitoringpb.ListGroupMembersRequest, opts ...gax.CallOption) *MonitoredResourceIterator {
	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.ListGroupMembers[0:len(c.CallOptions.ListGroupMembers):len(c.CallOptions.ListGroupMembers)], opts...)
	it := &MonitoredResourceIterator{}
	req = proto.Clone(req).(*monitoringpb.ListGroupMembersRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*monitoredrespb.MonitoredResource, string, error) {
	var resp *monitoringpb.ListGroupMembersResponse
	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.groupClient.ListGroupMembers(ctx, req, settings.GRPC...)
	return err
	}, opts...)
	if err != nil {
	return nil, "", err
	}

	it.Response = resp
	return resp.Members, resp.NextPageToken, 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.PageSize)
	it.pageInfo.Token = req.PageToken
	return it
	}

	// GroupIterator manages a stream of *monitoringpb.Group.
	type GroupIterator struct {
	items []*monitoringpb.Group
	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 []*monitoringpb.Group, nextPageToken string, err error)
	}

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

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

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

	// MonitoredResourceIterator manages a stream of *monitoredrespb.MonitoredResource.
	type MonitoredResourceIterator struct {
	items []*monitoredrespb.MonitoredResource
	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 []*monitoredrespb.MonitoredResource, nextPageToken string, err error)
	}

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

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

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