pubsub

package
v1.37.0 Latest Latest
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 Go to latest Published: Mar 7, 2024 License: Apache-2.0 Imports: 23 Imported by: 98

Documentation

Overview

Package pubsub is an auto-generated package for the Cloud Pub/Sub API.

Provides reliable, many-to-many, asynchronous messaging between applications.

General documentation

For information that is relevant for all client libraries please reference https://pkg.go.dev/cloud.google.com/go#pkg-overview. Some information on this page includes:

Example usage

To get started with this package, create a client. 

ctx := context.Background()
// This snippet has been automatically generated and should be regarded as a code template only.
// It will require modifications to work:
// - It may require correct/in-range values for request initialization.
// - It may require specifying regional endpoints when creating the service client as shown in:
//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
c, err := pubsub.NewSchemaClient(ctx)
if err != nil {
	// TODO: Handle error.
}
defer c.Close()

The client will use your default application credentials. Clients should be reused instead of created as needed. The methods of Client are safe for concurrent use by multiple goroutines. The returned client must be Closed when it is done being used.

Using the Client

The following is an example of making an API call with the newly created client. 

ctx := context.Background()
// This snippet has been automatically generated and should be regarded as a code template only.
// It will require modifications to work:
// - It may require correct/in-range values for request initialization.
// - It may require specifying regional endpoints when creating the service client as shown in:
//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
c, err := pubsub.NewSchemaClient(ctx)
if err != nil {
	// TODO: Handle error.
}
defer c.Close()

req := &pubsubpb.CommitSchemaRequest{
	// TODO: Fill request struct fields.
	// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#CommitSchemaRequest.
}
resp, err := c.CommitSchema(ctx, req)
if err != nil {
	// TODO: Handle error.
}
// TODO: Use resp.
_ = resp

Use of Context

The ctx passed to NewSchemaClient is used for authentication requests and for creating the underlying connection, but is not used for subsequent calls. Individual methods on the client use the ctx given to them.

To close the open connection, use the Close() method.

Index

Examples

Constants

This section is empty.

Variables

This section is empty.

Functions

func DefaultAuthScopes 

func DefaultAuthScopes() []string

DefaultAuthScopes reports the default set of authentication scopes to use with this package.

func PublisherProjectPath deprecated 

func PublisherProjectPath(project string) string

PublisherProjectPath returns the path for the project resource.

Deprecated: Use 

fmt.Sprintf("projects/%s", project)

instead.

func PublisherTopicPath deprecated 

func PublisherTopicPath(project, topic string) string

PublisherTopicPath returns the path for the topic resource.

Deprecated: Use 

fmt.Sprintf("projects/%s/topics/%s", project, topic)

instead.

func SubscriberProjectPath deprecated 

func SubscriberProjectPath(project string) string

SubscriberProjectPath returns the path for the project resource.

Deprecated: Use 

fmt.Sprintf("projects/%s", project)

instead.

func SubscriberSnapshotPath deprecated 

func SubscriberSnapshotPath(project, snapshot string) string

SubscriberSnapshotPath returns the path for the snapshot resource.

Deprecated: Use 

fmt.Sprintf("projects/%s/snapshots/%s", project, snapshot)

instead.

func SubscriberSubscriptionPath deprecated 

func SubscriberSubscriptionPath(project, subscription string) string

SubscriberSubscriptionPath returns the path for the subscription resource.

Deprecated: Use 

fmt.Sprintf("projects/%s/subscriptions/%s", project, subscription)

instead.

func SubscriberTopicPath deprecated 

func SubscriberTopicPath(project, topic string) string

SubscriberTopicPath returns the path for the topic resource.

Deprecated: Use 

fmt.Sprintf("projects/%s/topics/%s", project, topic)

instead.

Types

type PublisherCallOptions 

type PublisherCallOptions struct {
	CreateTopic            []gax.CallOption
	UpdateTopic            []gax.CallOption
	Publish                []gax.CallOption
	GetTopic               []gax.CallOption
	ListTopics             []gax.CallOption
	ListTopicSubscriptions []gax.CallOption
	ListTopicSnapshots     []gax.CallOption
	DeleteTopic            []gax.CallOption
	DetachSubscription     []gax.CallOption
	GetIamPolicy           []gax.CallOption
	SetIamPolicy           []gax.CallOption
	TestIamPermissions     []gax.CallOption
}

PublisherCallOptions contains the retry settings for each method of PublisherClient.

type PublisherClient 

type PublisherClient struct {

	// The call options for this service.
	CallOptions *PublisherCallOptions
	// contains filtered or unexported fields
}

PublisherClient 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.

The service that an application uses to manipulate topics, and to send messages to a topic.

func NewPublisherClient 

func NewPublisherClient(ctx context.Context, opts ...option.ClientOption) (*PublisherClient, error)

NewPublisherClient creates a new publisher client based on gRPC. The returned client must be Closed when it is done being used to clean up its underlying connections.

The service that an application uses to manipulate topics, and to send messages to a topic.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewPublisherClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	// TODO: Use client.
	_ = c
}

Output:

func NewPublisherRESTClient added in v1.29.0 

func NewPublisherRESTClient(ctx context.Context, opts ...option.ClientOption) (*PublisherClient, error)

NewPublisherRESTClient creates a new publisher rest client.

The service that an application uses to manipulate topics, and to send messages to a topic.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewPublisherRESTClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	// TODO: Use client.
	_ = c
}

Output:

func (*PublisherClient) Close 

func (c *PublisherClient) Close() error

Close closes the connection to the API service. The user should invoke this when the client is no longer required.

func (*PublisherClient) Connection deprecated 

func (c *PublisherClient) Connection() *grpc.ClientConn

Connection returns a connection to the API service.

Deprecated: Connections are now pooled so this method does not always return the same resource.

func (*PublisherClient) CreateTopic 

func (c *PublisherClient) CreateTopic(ctx context.Context, req *pubsubpb.Topic, opts ...gax.CallOption) (*pubsubpb.Topic, error)

CreateTopic creates the given topic with the given name. See the [resource name rules] (https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names (at https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names)).

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewPublisherClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.Topic{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#Topic.
	}
	resp, err := c.CreateTopic(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*PublisherClient) DeleteTopic 

func (c *PublisherClient) DeleteTopic(ctx context.Context, req *pubsubpb.DeleteTopicRequest, opts ...gax.CallOption) error

DeleteTopic deletes the topic with the given name. Returns NOT_FOUND if the topic does not exist. After a topic is deleted, a new topic may be created with the same name; this is an entirely new topic with none of the old configuration or subscriptions. Existing subscriptions to this topic are not deleted, but their topic field is set to _deleted-topic_.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewPublisherClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.DeleteTopicRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#DeleteTopicRequest.
	}
	err = c.DeleteTopic(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
}

Output:

func (*PublisherClient) DetachSubscription added in v1.4.0 

func (c *PublisherClient) DetachSubscription(ctx context.Context, req *pubsubpb.DetachSubscriptionRequest, opts ...gax.CallOption) (*pubsubpb.DetachSubscriptionResponse, error)

DetachSubscription detaches a subscription from this topic. All messages retained in the subscription are dropped. Subsequent Pull and StreamingPull requests will return FAILED_PRECONDITION. If the subscription is a push subscription, pushes to the endpoint will stop.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewPublisherClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.DetachSubscriptionRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#DetachSubscriptionRequest.
	}
	resp, err := c.DetachSubscription(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*PublisherClient) GetIamPolicy added in v1.12.0 

func (c *PublisherClient) GetIamPolicy(ctx context.Context, req *iampb.GetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error)

GetIamPolicy gets the access control policy for a resource. Returns an empty policy if the resource exists and does not have a policy set.

Example 
package main

import (
	"context"

	iampb "cloud.google.com/go/iam/apiv1/iampb"
	pubsub "cloud.google.com/go/pubsub/apiv1"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewPublisherClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &iampb.GetIamPolicyRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/iam/apiv1/iampb#GetIamPolicyRequest.
	}
	resp, err := c.GetIamPolicy(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*PublisherClient) GetTopic 

func (c *PublisherClient) GetTopic(ctx context.Context, req *pubsubpb.GetTopicRequest, opts ...gax.CallOption) (*pubsubpb.Topic, error)

GetTopic gets the configuration of a topic.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewPublisherClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.GetTopicRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#GetTopicRequest.
	}
	resp, err := c.GetTopic(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*PublisherClient) ListTopicSnapshots added in v1.3.0 

func (c *PublisherClient) ListTopicSnapshots(ctx context.Context, req *pubsubpb.ListTopicSnapshotsRequest, opts ...gax.CallOption) *StringIterator

ListTopicSnapshots lists the names of the snapshots on this topic. Snapshots are used in Seek (at https://cloud.google.com/pubsub/docs/replay-overview) operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
	"google.golang.org/api/iterator"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewPublisherClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.ListTopicSnapshotsRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#ListTopicSnapshotsRequest.
	}
	it := c.ListTopicSnapshots(ctx, req)
	for {
		resp, err := it.Next()
		if err == iterator.Done {
			break
		}
		if err != nil {
			// TODO: Handle error.
		}
		// TODO: Use resp.
		_ = resp
	}
}

Output:

func (*PublisherClient) ListTopicSubscriptions 

func (c *PublisherClient) ListTopicSubscriptions(ctx context.Context, req *pubsubpb.ListTopicSubscriptionsRequest, opts ...gax.CallOption) *StringIterator

ListTopicSubscriptions lists the names of the attached subscriptions on this topic.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
	"google.golang.org/api/iterator"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewPublisherClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.ListTopicSubscriptionsRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#ListTopicSubscriptionsRequest.
	}
	it := c.ListTopicSubscriptions(ctx, req)
	for {
		resp, err := it.Next()
		if err == iterator.Done {
			break
		}
		if err != nil {
			// TODO: Handle error.
		}
		// TODO: Use resp.
		_ = resp
	}
}

Output:

func (*PublisherClient) ListTopics 

func (c *PublisherClient) ListTopics(ctx context.Context, req *pubsubpb.ListTopicsRequest, opts ...gax.CallOption) *TopicIterator

ListTopics lists matching topics.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
	"google.golang.org/api/iterator"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewPublisherClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.ListTopicsRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#ListTopicsRequest.
	}
	it := c.ListTopics(ctx, req)
	for {
		resp, err := it.Next()
		if err == iterator.Done {
			break
		}
		if err != nil {
			// TODO: Handle error.
		}
		// TODO: Use resp.
		_ = resp
	}
}

Output:

func (*PublisherClient) Publish 

func (c *PublisherClient) Publish(ctx context.Context, req *pubsubpb.PublishRequest, opts ...gax.CallOption) (*pubsubpb.PublishResponse, error)

Publish adds one or more messages to the topic. Returns NOT_FOUND if the topic does not exist.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewPublisherClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.PublishRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#PublishRequest.
	}
	resp, err := c.Publish(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*PublisherClient) SetGoogleClientInfo 

func (pc *PublisherClient) SetGoogleClientInfo(keyval ...string)

SetGoogleClientInfo sets the name and version of the application in the `x-goog-api-client` header passed on each request. Also passes any provided key-value pairs. Intended for use by Google-written clients.

Internal use only.

func (*PublisherClient) SetIamPolicy added in v1.12.0 

func (c *PublisherClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error)

SetIamPolicy sets the access control policy on the specified resource. Replaces any existing policy.

Can return NOT_FOUND, INVALID_ARGUMENT, and PERMISSION_DENIED errors.

Example 
package main

import (
	"context"

	iampb "cloud.google.com/go/iam/apiv1/iampb"
	pubsub "cloud.google.com/go/pubsub/apiv1"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewPublisherClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &iampb.SetIamPolicyRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/iam/apiv1/iampb#SetIamPolicyRequest.
	}
	resp, err := c.SetIamPolicy(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*PublisherClient) SubscriptionIAM 

func (c *PublisherClient) SubscriptionIAM(subscription *pubsubpb.Subscription) *iam.Handle

func (*PublisherClient) TestIamPermissions added in v1.12.0 

func (c *PublisherClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error)

TestIamPermissions returns permissions that a caller has on the specified resource. If the resource does not exist, this will return an empty set of permissions, not a NOT_FOUND error.

Note: This operation is designed to be used for building permission-aware UIs and command-line tools, not for authorization checking. This operation may “fail open” without warning.

Example 
package main

import (
	"context"

	iampb "cloud.google.com/go/iam/apiv1/iampb"
	pubsub "cloud.google.com/go/pubsub/apiv1"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewPublisherClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &iampb.TestIamPermissionsRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/iam/apiv1/iampb#TestIamPermissionsRequest.
	}
	resp, err := c.TestIamPermissions(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*PublisherClient) TopicIAM 

func (c *PublisherClient) TopicIAM(topic *pubsubpb.Topic) *iam.Handle

func (*PublisherClient) UpdateTopic 

func (c *PublisherClient) UpdateTopic(ctx context.Context, req *pubsubpb.UpdateTopicRequest, opts ...gax.CallOption) (*pubsubpb.Topic, error)

UpdateTopic updates an existing topic by updating the fields specified in the update mask. Note that certain properties of a topic are not modifiable.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewPublisherClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.UpdateTopicRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#UpdateTopicRequest.
	}
	resp, err := c.UpdateTopic(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

type SchemaCallOptions added in v1.10.0 

type SchemaCallOptions struct {
	CreateSchema         []gax.CallOption
	GetSchema            []gax.CallOption
	ListSchemas          []gax.CallOption
	ListSchemaRevisions  []gax.CallOption
	CommitSchema         []gax.CallOption
	RollbackSchema       []gax.CallOption
	DeleteSchemaRevision []gax.CallOption
	DeleteSchema         []gax.CallOption
	ValidateSchema       []gax.CallOption
	ValidateMessage      []gax.CallOption
	GetIamPolicy         []gax.CallOption
	SetIamPolicy         []gax.CallOption
	TestIamPermissions   []gax.CallOption
}

SchemaCallOptions contains the retry settings for each method of SchemaClient.

type SchemaClient added in v1.10.0 

type SchemaClient struct {

	// The call options for this service.
	CallOptions *SchemaCallOptions
	// contains filtered or unexported fields
}

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.

Service for doing schema-related operations.

func NewSchemaClient added in v1.10.0 

func NewSchemaClient(ctx context.Context, opts ...option.ClientOption) (*SchemaClient, error)

NewSchemaClient creates a new schema service client based on gRPC. The returned client must be Closed when it is done being used to clean up its underlying connections.

Service for doing schema-related operations.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSchemaClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	// TODO: Use client.
	_ = c
}

Output:

func NewSchemaRESTClient added in v1.29.0 

func NewSchemaRESTClient(ctx context.Context, opts ...option.ClientOption) (*SchemaClient, error)

NewSchemaRESTClient creates a new schema service rest client.

Service for doing schema-related operations.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSchemaRESTClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	// TODO: Use client.
	_ = c
}

Output:

func (*SchemaClient) Close added in v1.10.0 

func (c *SchemaClient) Close() error

Close closes the connection to the API service. The user should invoke this when the client is no longer required.

func (*SchemaClient) CommitSchema added in v1.29.0 

func (c *SchemaClient) CommitSchema(ctx context.Context, req *pubsubpb.CommitSchemaRequest, opts ...gax.CallOption) (*pubsubpb.Schema, error)

CommitSchema commits a new schema revision to an existing schema.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSchemaClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.CommitSchemaRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#CommitSchemaRequest.
	}
	resp, err := c.CommitSchema(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*SchemaClient) Connection deprecated added in v1.10.0 

func (c *SchemaClient) Connection() *grpc.ClientConn

Connection returns a connection to the API service.

Deprecated: Connections are now pooled so this method does not always return the same resource.

func (*SchemaClient) CreateSchema added in v1.10.0 

func (c *SchemaClient) CreateSchema(ctx context.Context, req *pubsubpb.CreateSchemaRequest, opts ...gax.CallOption) (*pubsubpb.Schema, error)

CreateSchema creates a schema.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSchemaClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.CreateSchemaRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#CreateSchemaRequest.
	}
	resp, err := c.CreateSchema(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*SchemaClient) DeleteSchema added in v1.10.0 

func (c *SchemaClient) DeleteSchema(ctx context.Context, req *pubsubpb.DeleteSchemaRequest, opts ...gax.CallOption) error

DeleteSchema deletes a schema.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSchemaClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.DeleteSchemaRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#DeleteSchemaRequest.
	}
	err = c.DeleteSchema(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
}

Output:

func (*SchemaClient) DeleteSchemaRevision added in v1.29.0 

func (c *SchemaClient) DeleteSchemaRevision(ctx context.Context, req *pubsubpb.DeleteSchemaRevisionRequest, opts ...gax.CallOption) (*pubsubpb.Schema, error)

DeleteSchemaRevision deletes a specific schema revision.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSchemaClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.DeleteSchemaRevisionRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#DeleteSchemaRevisionRequest.
	}
	resp, err := c.DeleteSchemaRevision(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*SchemaClient) GetIamPolicy added in v1.12.0 

func (c *SchemaClient) GetIamPolicy(ctx context.Context, req *iampb.GetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error)

GetIamPolicy gets the access control policy for a resource. Returns an empty policy if the resource exists and does not have a policy set.

Example 
package main

import (
	"context"

	iampb "cloud.google.com/go/iam/apiv1/iampb"
	pubsub "cloud.google.com/go/pubsub/apiv1"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSchemaClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &iampb.GetIamPolicyRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/iam/apiv1/iampb#GetIamPolicyRequest.
	}
	resp, err := c.GetIamPolicy(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*SchemaClient) GetSchema added in v1.10.0 

func (c *SchemaClient) GetSchema(ctx context.Context, req *pubsubpb.GetSchemaRequest, opts ...gax.CallOption) (*pubsubpb.Schema, error)

GetSchema gets a schema.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSchemaClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.GetSchemaRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#GetSchemaRequest.
	}
	resp, err := c.GetSchema(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*SchemaClient) ListSchemaRevisions added in v1.29.0 

func (c *SchemaClient) ListSchemaRevisions(ctx context.Context, req *pubsubpb.ListSchemaRevisionsRequest, opts ...gax.CallOption) *SchemaIterator

ListSchemaRevisions lists all schema revisions for the named schema.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
	"google.golang.org/api/iterator"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSchemaClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.ListSchemaRevisionsRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#ListSchemaRevisionsRequest.
	}
	it := c.ListSchemaRevisions(ctx, req)
	for {
		resp, err := it.Next()
		if err == iterator.Done {
			break
		}
		if err != nil {
			// TODO: Handle error.
		}
		// TODO: Use resp.
		_ = resp
	}
}

Output:

func (*SchemaClient) ListSchemas added in v1.10.0 

func (c *SchemaClient) ListSchemas(ctx context.Context, req *pubsubpb.ListSchemasRequest, opts ...gax.CallOption) *SchemaIterator

ListSchemas lists schemas in a project.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
	"google.golang.org/api/iterator"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSchemaClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.ListSchemasRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#ListSchemasRequest.
	}
	it := c.ListSchemas(ctx, req)
	for {
		resp, err := it.Next()
		if err == iterator.Done {
			break
		}
		if err != nil {
			// TODO: Handle error.
		}
		// TODO: Use resp.
		_ = resp
	}
}

Output:

func (*SchemaClient) RollbackSchema added in v1.29.0 

func (c *SchemaClient) RollbackSchema(ctx context.Context, req *pubsubpb.RollbackSchemaRequest, opts ...gax.CallOption) (*pubsubpb.Schema, error)

RollbackSchema creates a new schema revision that is a copy of the provided revision_id.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSchemaClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.RollbackSchemaRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#RollbackSchemaRequest.
	}
	resp, err := c.RollbackSchema(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*SchemaClient) SetIamPolicy added in v1.12.0 

func (c *SchemaClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error)

SetIamPolicy sets the access control policy on the specified resource. Replaces any existing policy.

Can return NOT_FOUND, INVALID_ARGUMENT, and PERMISSION_DENIED errors.

Example 
package main

import (
	"context"

	iampb "cloud.google.com/go/iam/apiv1/iampb"
	pubsub "cloud.google.com/go/pubsub/apiv1"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSchemaClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &iampb.SetIamPolicyRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/iam/apiv1/iampb#SetIamPolicyRequest.
	}
	resp, err := c.SetIamPolicy(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*SchemaClient) TestIamPermissions added in v1.12.0 

func (c *SchemaClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error)

TestIamPermissions returns permissions that a caller has on the specified resource. If the resource does not exist, this will return an empty set of permissions, not a NOT_FOUND error.

Note: This operation is designed to be used for building permission-aware UIs and command-line tools, not for authorization checking. This operation may “fail open” without warning.

Example 
package main

import (
	"context"

	iampb "cloud.google.com/go/iam/apiv1/iampb"
	pubsub "cloud.google.com/go/pubsub/apiv1"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSchemaClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &iampb.TestIamPermissionsRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/iam/apiv1/iampb#TestIamPermissionsRequest.
	}
	resp, err := c.TestIamPermissions(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*SchemaClient) ValidateMessage added in v1.10.0 

func (c *SchemaClient) ValidateMessage(ctx context.Context, req *pubsubpb.ValidateMessageRequest, opts ...gax.CallOption) (*pubsubpb.ValidateMessageResponse, error)

ValidateMessage validates a message against a schema.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSchemaClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.ValidateMessageRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#ValidateMessageRequest.
	}
	resp, err := c.ValidateMessage(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*SchemaClient) ValidateSchema added in v1.10.0 

func (c *SchemaClient) ValidateSchema(ctx context.Context, req *pubsubpb.ValidateSchemaRequest, opts ...gax.CallOption) (*pubsubpb.ValidateSchemaResponse, error)

ValidateSchema validates a schema.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSchemaClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.ValidateSchemaRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#ValidateSchemaRequest.
	}
	resp, err := c.ValidateSchema(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

type SchemaIterator added in v1.10.0 

type SchemaIterator struct {

	// 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)
	// contains filtered or unexported fields
}

SchemaIterator manages a stream of *pubsubpb.Schema.

func (*SchemaIterator) Next added in v1.10.0 

func (it *SchemaIterator) Next() (*pubsubpb.Schema, error)

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 (*SchemaIterator) PageInfo added in v1.10.0 

func (it *SchemaIterator) PageInfo() *iterator.PageInfo

PageInfo supports pagination. See the google.golang.org/api/iterator package for details.

type SnapshotIterator 

type SnapshotIterator struct {

	// 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.Snapshot, nextPageToken string, err error)
	// contains filtered or unexported fields
}

SnapshotIterator manages a stream of *pubsubpb.Snapshot.

func (*SnapshotIterator) Next 

func (it *SnapshotIterator) Next() (*pubsubpb.Snapshot, error)

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 (*SnapshotIterator) PageInfo 

func (it *SnapshotIterator) PageInfo() *iterator.PageInfo

PageInfo supports pagination. See the google.golang.org/api/iterator package for details.

type StringIterator 

type StringIterator struct {

	// 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 []string, nextPageToken string, err error)
	// contains filtered or unexported fields
}

StringIterator manages a stream of string.

func (*StringIterator) Next 

func (it *StringIterator) Next() (string, error)

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 (*StringIterator) PageInfo 

func (it *StringIterator) PageInfo() *iterator.PageInfo

PageInfo supports pagination. See the google.golang.org/api/iterator package for details.

type SubscriberCallOptions 

type SubscriberCallOptions struct {
	CreateSubscription []gax.CallOption
	GetSubscription    []gax.CallOption
	UpdateSubscription []gax.CallOption
	ListSubscriptions  []gax.CallOption
	DeleteSubscription []gax.CallOption
	ModifyAckDeadline  []gax.CallOption
	Acknowledge        []gax.CallOption
	Pull               []gax.CallOption
	StreamingPull      []gax.CallOption
	ModifyPushConfig   []gax.CallOption
	GetSnapshot        []gax.CallOption
	ListSnapshots      []gax.CallOption
	CreateSnapshot     []gax.CallOption
	UpdateSnapshot     []gax.CallOption
	DeleteSnapshot     []gax.CallOption
	Seek               []gax.CallOption
	GetIamPolicy       []gax.CallOption
	SetIamPolicy       []gax.CallOption
	TestIamPermissions []gax.CallOption
}

SubscriberCallOptions contains the retry settings for each method of SubscriberClient.

type SubscriberClient 

type SubscriberClient struct {

	// The call options for this service.
	CallOptions *SubscriberCallOptions
	// contains filtered or unexported fields
}

SubscriberClient 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.

The service that an application uses to manipulate subscriptions and to consume messages from a subscription via the Pull method or by establishing a bi-directional stream using the StreamingPull method.

func NewSubscriberClient 

func NewSubscriberClient(ctx context.Context, opts ...option.ClientOption) (*SubscriberClient, error)

NewSubscriberClient creates a new subscriber client based on gRPC. The returned client must be Closed when it is done being used to clean up its underlying connections.

The service that an application uses to manipulate subscriptions and to consume messages from a subscription via the Pull method or by establishing a bi-directional stream using the StreamingPull method.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	// TODO: Use client.
	_ = c
}

Output:

func NewSubscriberRESTClient added in v1.29.0 

func NewSubscriberRESTClient(ctx context.Context, opts ...option.ClientOption) (*SubscriberClient, error)

NewSubscriberRESTClient creates a new subscriber rest client.

The service that an application uses to manipulate subscriptions and to consume messages from a subscription via the Pull method or by establishing a bi-directional stream using the StreamingPull method.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberRESTClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	// TODO: Use client.
	_ = c
}

Output:

func (*SubscriberClient) Acknowledge 

func (c *SubscriberClient) Acknowledge(ctx context.Context, req *pubsubpb.AcknowledgeRequest, opts ...gax.CallOption) error

Acknowledge acknowledges the messages associated with the ack_ids in the AcknowledgeRequest. The Pub/Sub system can remove the relevant messages from the subscription.

Acknowledging a message whose ack deadline has expired may succeed, but such a message may be redelivered later. Acknowledging a message more than once will not result in an error.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.AcknowledgeRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#AcknowledgeRequest.
	}
	err = c.Acknowledge(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
}

Output:

func (*SubscriberClient) Close 

func (c *SubscriberClient) Close() error

Close closes the connection to the API service. The user should invoke this when the client is no longer required.

func (*SubscriberClient) Connection deprecated 

func (c *SubscriberClient) Connection() *grpc.ClientConn

Connection returns a connection to the API service.

Deprecated: Connections are now pooled so this method does not always return the same resource.

func (*SubscriberClient) CreateSnapshot 

func (c *SubscriberClient) CreateSnapshot(ctx context.Context, req *pubsubpb.CreateSnapshotRequest, opts ...gax.CallOption) (*pubsubpb.Snapshot, error)

CreateSnapshot creates a snapshot from the requested subscription. Snapshots are used in Seek (at https://cloud.google.com/pubsub/docs/replay-overview) operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot. If the snapshot already exists, returns ALREADY_EXISTS. If the requested subscription doesn’t exist, returns NOT_FOUND. If the backlog in the subscription is too old – and the resulting snapshot would expire in less than 1 hour – then FAILED_PRECONDITION is returned. See also the Snapshot.expire_time field. If the name is not provided in the request, the server will assign a random name for this snapshot on the same project as the subscription, conforming to the [resource name format] (https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names (at https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names)). The generated name is populated in the returned Snapshot object. Note that for REST API requests, you must specify a name in the request.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.CreateSnapshotRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#CreateSnapshotRequest.
	}
	resp, err := c.CreateSnapshot(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*SubscriberClient) CreateSubscription 

func (c *SubscriberClient) CreateSubscription(ctx context.Context, req *pubsubpb.Subscription, opts ...gax.CallOption) (*pubsubpb.Subscription, error)

CreateSubscription creates a subscription to a given topic. See the [resource name rules] (https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names (at https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names)). If the subscription already exists, returns ALREADY_EXISTS. If the corresponding topic doesn’t exist, returns NOT_FOUND.

If the name is not provided in the request, the server will assign a random name for this subscription on the same project as the topic, conforming to the [resource name format] (https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names (at https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names)). The generated name is populated in the returned Subscription object. Note that for REST API requests, you must specify a name in the request.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.Subscription{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#Subscription.
	}
	resp, err := c.CreateSubscription(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*SubscriberClient) DeleteSnapshot 

func (c *SubscriberClient) DeleteSnapshot(ctx context.Context, req *pubsubpb.DeleteSnapshotRequest, opts ...gax.CallOption) error

DeleteSnapshot removes an existing snapshot. Snapshots are used in [Seek] (https://cloud.google.com/pubsub/docs/replay-overview (at https://cloud.google.com/pubsub/docs/replay-overview)) operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot. When the snapshot is deleted, all messages retained in the snapshot are immediately dropped. After a snapshot is deleted, a new one may be created with the same name, but the new one has no association with the old snapshot or its subscription, unless the same subscription is specified.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.DeleteSnapshotRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#DeleteSnapshotRequest.
	}
	err = c.DeleteSnapshot(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
}

Output:

func (*SubscriberClient) DeleteSubscription 

func (c *SubscriberClient) DeleteSubscription(ctx context.Context, req *pubsubpb.DeleteSubscriptionRequest, opts ...gax.CallOption) error

DeleteSubscription deletes an existing subscription. All messages retained in the subscription are immediately dropped. Calls to Pull after deletion will return NOT_FOUND. After a subscription is deleted, a new one may be created with the same name, but the new one has no association with the old subscription or its topic unless the same topic is specified.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.DeleteSubscriptionRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#DeleteSubscriptionRequest.
	}
	err = c.DeleteSubscription(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
}

Output:

func (*SubscriberClient) GetIamPolicy added in v1.12.0 

func (c *SubscriberClient) GetIamPolicy(ctx context.Context, req *iampb.GetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error)

GetIamPolicy gets the access control policy for a resource. Returns an empty policy if the resource exists and does not have a policy set.

Example 
package main

import (
	"context"

	iampb "cloud.google.com/go/iam/apiv1/iampb"
	pubsub "cloud.google.com/go/pubsub/apiv1"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &iampb.GetIamPolicyRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/iam/apiv1/iampb#GetIamPolicyRequest.
	}
	resp, err := c.GetIamPolicy(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*SubscriberClient) GetSnapshot added in v1.3.0 

func (c *SubscriberClient) GetSnapshot(ctx context.Context, req *pubsubpb.GetSnapshotRequest, opts ...gax.CallOption) (*pubsubpb.Snapshot, error)

GetSnapshot gets the configuration details of a snapshot. Snapshots are used in Seek (at https://cloud.google.com/pubsub/docs/replay-overview) operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.GetSnapshotRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#GetSnapshotRequest.
	}
	resp, err := c.GetSnapshot(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*SubscriberClient) GetSubscription 

func (c *SubscriberClient) GetSubscription(ctx context.Context, req *pubsubpb.GetSubscriptionRequest, opts ...gax.CallOption) (*pubsubpb.Subscription, error)

GetSubscription gets the configuration details of a subscription.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.GetSubscriptionRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#GetSubscriptionRequest.
	}
	resp, err := c.GetSubscription(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*SubscriberClient) ListSnapshots 

func (c *SubscriberClient) ListSnapshots(ctx context.Context, req *pubsubpb.ListSnapshotsRequest, opts ...gax.CallOption) *SnapshotIterator

ListSnapshots lists the existing snapshots. Snapshots are used in Seek (at https://cloud.google.com/pubsub/docs/replay-overview) operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
	"google.golang.org/api/iterator"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.ListSnapshotsRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#ListSnapshotsRequest.
	}
	it := c.ListSnapshots(ctx, req)
	for {
		resp, err := it.Next()
		if err == iterator.Done {
			break
		}
		if err != nil {
			// TODO: Handle error.
		}
		// TODO: Use resp.
		_ = resp
	}
}

Output:

func (*SubscriberClient) ListSubscriptions 

func (c *SubscriberClient) ListSubscriptions(ctx context.Context, req *pubsubpb.ListSubscriptionsRequest, opts ...gax.CallOption) *SubscriptionIterator

ListSubscriptions lists matching subscriptions.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
	"google.golang.org/api/iterator"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.ListSubscriptionsRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#ListSubscriptionsRequest.
	}
	it := c.ListSubscriptions(ctx, req)
	for {
		resp, err := it.Next()
		if err == iterator.Done {
			break
		}
		if err != nil {
			// TODO: Handle error.
		}
		// TODO: Use resp.
		_ = resp
	}
}

Output:

func (*SubscriberClient) ModifyAckDeadline 

func (c *SubscriberClient) ModifyAckDeadline(ctx context.Context, req *pubsubpb.ModifyAckDeadlineRequest, opts ...gax.CallOption) error

ModifyAckDeadline modifies the ack deadline for a specific message. This method is useful to indicate that more time is needed to process a message by the subscriber, or to make the message available for redelivery if the processing was interrupted. Note that this does not modify the subscription-level ackDeadlineSeconds used for subsequent messages.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.ModifyAckDeadlineRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#ModifyAckDeadlineRequest.
	}
	err = c.ModifyAckDeadline(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
}

Output:

func (*SubscriberClient) ModifyPushConfig 

func (c *SubscriberClient) ModifyPushConfig(ctx context.Context, req *pubsubpb.ModifyPushConfigRequest, opts ...gax.CallOption) error

ModifyPushConfig modifies the PushConfig for a specified subscription.

This may be used to change a push subscription to a pull one (signified by an empty PushConfig) or vice versa, or change the endpoint URL and other attributes of a push subscription. Messages will accumulate for delivery continuously through the call regardless of changes to the PushConfig.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.ModifyPushConfigRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#ModifyPushConfigRequest.
	}
	err = c.ModifyPushConfig(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
}

Output:

func (*SubscriberClient) Pull 

func (c *SubscriberClient) Pull(ctx context.Context, req *pubsubpb.PullRequest, opts ...gax.CallOption) (*pubsubpb.PullResponse, error)

Pull pulls messages from the server.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.PullRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#PullRequest.
	}
	resp, err := c.Pull(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:
Example (LengthyClientProcessing) 
package main

import (
	"context"
	"fmt"
	"log"
	"time"

	pubsub "cloud.google.com/go/pubsub/apiv1"
	"cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	projectID := "some-project"
	subscriptionID := "some-subscription"

	ctx := context.Background()
	client, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		log.Fatal(err)
	}
	defer client.Close()

	sub := fmt.Sprintf("projects/%s/subscriptions/%s", projectID, subscriptionID)
	// Be sure to tune the MaxMessages parameter per your project's needs, and accordingly
	// adjust the ack behavior below to batch acknowledgements.
	req := pubsubpb.PullRequest{
		Subscription: sub,
		MaxMessages:  1,
	}

	fmt.Println("Listening..")

	for {
		res, err := client.Pull(ctx, &req)
		if err != nil {
			log.Fatal(err)
		}

		// client.Pull returns an empty list if there are no messages available in the
		// backlog. We should skip processing steps when that happens.
		if len(res.ReceivedMessages) == 0 {
			continue
		}

		var recvdAckIDs []string
		for _, m := range res.ReceivedMessages {
			recvdAckIDs = append(recvdAckIDs, m.AckId)
		}

		var done = make(chan struct{})
		var delay = 0 * time.Second // Tick immediately upon reception
		var ackDeadline = 10 * time.Second

		// Continuously notify the server that processing is still happening on this batch.
		go func() {
			for {
				select {
				case <-ctx.Done():
					return
				case <-done:
					return
				case <-time.After(delay):
					err := client.ModifyAckDeadline(ctx, &pubsubpb.ModifyAckDeadlineRequest{
						Subscription:       sub,
						AckIds:             recvdAckIDs,
						AckDeadlineSeconds: int32(ackDeadline.Seconds()),
					})
					if err != nil {
						log.Fatal(err)
					}
					delay = ackDeadline - 5*time.Second // 5 seconds grace period.
				}
			}
		}()

		for _, m := range res.ReceivedMessages {
			// Process the message here, possibly in a goroutine.
			log.Printf("Got message: %s", string(m.Message.Data))

			err := client.Acknowledge(ctx, &pubsubpb.AcknowledgeRequest{
				Subscription: sub,
				AckIds:       []string{m.AckId},
			})
			if err != nil {
				log.Fatal(err)
			}
		}

		close(done)
	}
}

Output:

func (*SubscriberClient) Seek 

func (c *SubscriberClient) Seek(ctx context.Context, req *pubsubpb.SeekRequest, opts ...gax.CallOption) (*pubsubpb.SeekResponse, error)

Seek seeks an existing subscription to a point in time or to a given snapshot, whichever is provided in the request. Snapshots are used in [Seek] (https://cloud.google.com/pubsub/docs/replay-overview (at https://cloud.google.com/pubsub/docs/replay-overview)) operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot. Note that both the subscription and the snapshot must be on the same topic.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.SeekRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#SeekRequest.
	}
	resp, err := c.Seek(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*SubscriberClient) SetGoogleClientInfo 

func (sc *SubscriberClient) SetGoogleClientInfo(keyval ...string)

SetGoogleClientInfo sets the name and version of the application in the `x-goog-api-client` header passed on each request. Also passes any provided key-value pairs. Intended for use by Google-written clients.

Internal use only.

func (*SubscriberClient) SetIamPolicy added in v1.12.0 

func (c *SubscriberClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error)

SetIamPolicy sets the access control policy on the specified resource. Replaces any existing policy.

Can return NOT_FOUND, INVALID_ARGUMENT, and PERMISSION_DENIED errors.

Example 
package main

import (
	"context"

	iampb "cloud.google.com/go/iam/apiv1/iampb"
	pubsub "cloud.google.com/go/pubsub/apiv1"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &iampb.SetIamPolicyRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/iam/apiv1/iampb#SetIamPolicyRequest.
	}
	resp, err := c.SetIamPolicy(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*SubscriberClient) StreamingPull 

func (c *SubscriberClient) StreamingPull(ctx context.Context, opts ...gax.CallOption) (pubsubpb.Subscriber_StreamingPullClient, error)

StreamingPull establishes a stream with the server, which sends messages down to the client. The client streams acknowledgements and ack deadline modifications back to the server. The server will close the stream and return the status on any error. The server may close the stream with status UNAVAILABLE to reassign server-side resources, in which case, the client should re-establish the stream. Flow control can be achieved by configuring the underlying RPC channel.

This method is not supported for the REST transport.

Example 
package main

import (
	"context"
	"io"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()
	stream, err := c.StreamingPull(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	go func() {
		reqs := []*pubsubpb.StreamingPullRequest{
			// TODO: Create requests.
		}
		for _, req := range reqs {
			if err := stream.Send(req); err != nil {
				// TODO: Handle error.
			}
		}
		stream.CloseSend()
	}()
	for {
		resp, err := stream.Recv()
		if err == io.EOF {
			break
		}
		if err != nil {
			// TODO: handle error.
		}
		// TODO: Use resp.
		_ = resp
	}
}

Output:

func (*SubscriberClient) SubscriptionIAM 

func (c *SubscriberClient) SubscriptionIAM(subscription *pubsubpb.Subscription) *iam.Handle

func (*SubscriberClient) TestIamPermissions added in v1.12.0 

func (c *SubscriberClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error)

TestIamPermissions returns permissions that a caller has on the specified resource. If the resource does not exist, this will return an empty set of permissions, not a NOT_FOUND error.

Note: This operation is designed to be used for building permission-aware UIs and command-line tools, not for authorization checking. This operation may “fail open” without warning.

Example 
package main

import (
	"context"

	iampb "cloud.google.com/go/iam/apiv1/iampb"
	pubsub "cloud.google.com/go/pubsub/apiv1"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &iampb.TestIamPermissionsRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/iam/apiv1/iampb#TestIamPermissionsRequest.
	}
	resp, err := c.TestIamPermissions(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*SubscriberClient) TopicIAM 

func (c *SubscriberClient) TopicIAM(topic *pubsubpb.Topic) *iam.Handle

func (*SubscriberClient) UpdateSnapshot 

func (c *SubscriberClient) UpdateSnapshot(ctx context.Context, req *pubsubpb.UpdateSnapshotRequest, opts ...gax.CallOption) (*pubsubpb.Snapshot, error)

UpdateSnapshot updates an existing snapshot by updating the fields specified in the update mask. Snapshots are used in Seek (at https://cloud.google.com/pubsub/docs/replay-overview) operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.UpdateSnapshotRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#UpdateSnapshotRequest.
	}
	resp, err := c.UpdateSnapshot(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*SubscriberClient) UpdateSubscription 

func (c *SubscriberClient) UpdateSubscription(ctx context.Context, req *pubsubpb.UpdateSubscriptionRequest, opts ...gax.CallOption) (*pubsubpb.Subscription, error)

UpdateSubscription updates an existing subscription by updating the fields specified in the update mask. Note that certain properties of a subscription, such as its topic, are not modifiable.

Example 
package main

import (
	"context"

	pubsub "cloud.google.com/go/pubsub/apiv1"

	pubsubpb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
)

func main() {
	ctx := context.Background()
	// This snippet has been automatically generated and should be regarded as a code template only.
	// It will require modifications to work:
	// - It may require correct/in-range values for request initialization.
	// - It may require specifying regional endpoints when creating the service client as shown in:
	//   https://pkg.go.dev/cloud.google.com/go#hdr-Client_Options
	c, err := pubsub.NewSubscriberClient(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	defer c.Close()

	req := &pubsubpb.UpdateSubscriptionRequest{
		// TODO: Fill request struct fields.
		// See https://pkg.go.dev/cloud.google.com/go/pubsub/apiv1/pubsubpb#UpdateSubscriptionRequest.
	}
	resp, err := c.UpdateSubscription(ctx, req)
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

type SubscriptionIterator 

type SubscriptionIterator struct {

	// 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.Subscription, nextPageToken string, err error)
	// contains filtered or unexported fields
}

SubscriptionIterator manages a stream of *pubsubpb.Subscription.

func (*SubscriptionIterator) Next 

func (it *SubscriptionIterator) Next() (*pubsubpb.Subscription, error)

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 (*SubscriptionIterator) PageInfo 

func (it *SubscriptionIterator) PageInfo() *iterator.PageInfo

PageInfo supports pagination. See the google.golang.org/api/iterator package for details.

type TopicIterator 

type TopicIterator struct {

	// 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.Topic, nextPageToken string, err error)
	// contains filtered or unexported fields
}

TopicIterator manages a stream of *pubsubpb.Topic.

func (*TopicIterator) Next 

func (it *TopicIterator) Next() (*pubsubpb.Topic, error)

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 (*TopicIterator) PageInfo 

func (it *TopicIterator) PageInfo() *iterator.PageInfo

PageInfo supports pagination. See the google.golang.org/api/iterator package for details.

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