Cloud Pub/Sub v1 API - Class PublisherClient (3.4.0)

Version 3.4.0

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public abstract class PublisherClient : IAsyncDisposable

Reference documentation and code samples for the Cloud Pub/Sub v1 API class PublisherClient.

A PubSub publisher that is associated with a specific TopicName.

Inheritance

object > PublisherClient

Implements

IAsyncDisposable

Inherited Members

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ToString()

Derived Types

PublisherClientImpl

Namespace

GoogleGoogle.CloudGoogle.Cloud.PubSubV1

Assembly

Google.Cloud.PubSub.V1.dll

Remarks

This class implements the IAsyncDisposable interface. However, it is recommended to create a single PublisherClient instance and use it throughout the lifetime of the application. If the PublisherClient is registered in a dependency injection container, its DisposeAsync method will be called automatically.

Properties

ApiMaxBatchingSettings

public static BatchingSettings ApiMaxBatchingSettings { get; }

The absolute maximum BatchingSettings supported by the service. Maximum values are: ElementCountThreshold = 1,000; ByteCountThreshold = 10,000,000;

Property Value
Type	Description
BatchingSettings

DefaultBatchingSettings

public static BatchingSettings DefaultBatchingSettings { get; }

Default BatchingSettings for PublisherClient. Default values are: ElementCountThreshold = 100; ByteCountThreshold = 1,000,000; DelayThreshold = 10 milliseconds;

Property Value
Type	Description
BatchingSettings

DefaultDisposeTimeout

public static TimeSpan DefaultDisposeTimeout { get; }

The default DisposeTimeout of 5 seconds for the PublisherClient.

Property Value
Type	Description
TimeSpan

TopicName

public virtual TopicName TopicName { get; }

The associated TopicName.

Property Value
Type	Description
TopicName

Methods

Create(TopicName)

public static PublisherClient Create(TopicName topicName)

Create a PublisherClient instance associated with the specified TopicName, using default settings.

Parameter
Name	Description
topicName	TopicName The TopicName to publish messages to. Must not be null.

Returns
Type	Description
PublisherClient	A PublisherClient instance associated with the specified TopicName.

Create(TopicName, ClientCreationSettings, Settings)

[Obsolete("Use PublisherClient.Create(TopicName) to use the default settings, or PublisherClientBuilder for customization.")]
public static PublisherClient Create(TopicName topicName, PublisherClient.ClientCreationSettings clientCreationSettings = null, PublisherClient.Settings settings = null)

Create a PublisherClient instance associated with the specified TopicName. The default settings and clientCreationSettings are suitable for machines with high network bandwidth (e.g. Google Compute Engine instances). If running with more limited network bandwidth, some settings may need changing; especially PublisherServiceApiSettings.PublishSettings.Retry. By default this method generates a gRPC channel per CPU core; if using a high-core-count machine and using many clients concurrently then this may need reducing; use the setting ClientCount.

Parameters
Name	Description
topicName	TopicName The TopicName to publish messages to. Must not be null.
clientCreationSettings	PublisherClientClientCreationSettings Optional. PublisherClient.ClientCreationSettings specifying how to create PublisherServiceApiClients.
settings	PublisherClientSettings Optional. PublisherClient.Settings for creating a PublisherClient.

Returns
Type	Description
PublisherClient	A PublisherClient instance associated with the specified TopicName.

CreateAsync(TopicName)

public static Task<PublisherClient> CreateAsync(TopicName topicName)

Creates a PublisherClient instance associated with the specified TopicName, using default settings.

Parameter
Name	Description
topicName	TopicName The TopicName to publish messages to. Must not be null.

Returns
Type	Description
TaskPublisherClient	A PublisherClient instance associated with the specified TopicName.

CreateAsync(TopicName, ClientCreationSettings, Settings)

[Obsolete("Use PublisherClient.CreateAsync(TopicName) to use the default settings, or PublisherClientBuilder for customization.")]
public static Task<PublisherClient> CreateAsync(TopicName topicName, PublisherClient.ClientCreationSettings clientCreationSettings = null, PublisherClient.Settings settings = null)

Create a PublisherClient instance associated with the specified TopicName. The default settings and clientCreationSettings are suitable for machines with high network bandwidth (e.g. Google Compute Engine instances). If running with more limited network bandwidth, some settings may need changing; especially PublisherServiceApiSettings.PublishSettings.Retry. By default this method generates a gRPC channel per CPU core; if using a high-core-count machine and using many clients concurrently then this may need reducing; use the setting ClientCount.

Parameters
Name	Description
topicName	TopicName The TopicName to publish messages to. Must not be null.
clientCreationSettings	PublisherClientClientCreationSettings Optional. PublisherClient.ClientCreationSettings specifying how to create PublisherServiceApiClients.
settings	PublisherClientSettings Optional. PublisherClient.Settings for creating a PublisherClient.

Returns
Type	Description
TaskPublisherClient	A PublisherClient instance associated with the specified TopicName.

DisposeAsync()

public virtual ValueTask DisposeAsync()

Disposes this PublisherClient asynchronously.

Returns
Type	Description
ValueTask

Remarks

This method asynchronously waits for the time interval as specified in the DisposeTimeout for the PublisherClient to send any pending messages. If the clean shutdown is not complete after this time, it is aborted; this may leave some locally queued messages unsent. The time interval can be customized by setting the DisposeTimeout.

PublishAsync(PubsubMessage)

public virtual Task<string> PublishAsync(PubsubMessage message)

Publish a message to the topic specified in TopicName.

Parameter
Name	Description
message	PubsubMessage The PubsubMessage to publish.

Returns
Type	Description
Taskstring	A task which completes once the message has been published. The task Result contains the message ID.

PublishAsync(ByteString)

public virtual Task<string> PublishAsync(ByteString message)

Publish a message to the topic specified in TopicName.

Parameter
Name	Description
message	ByteString The ByteString to publish.

Returns
Type	Description
Taskstring	A task which completes once the message has been published. The task Result contains the message ID.

PublishAsync(IMessage)

public virtual Task<string> PublishAsync(IMessage message)

Publish a message to the topic specified in TopicName.

Parameter
Name	Description
message	IMessage The message to publish.

Returns
Type	Description
Taskstring	A task which completes once the message has been published. The task Result contains the message ID.

PublishAsync(byte[])

public virtual Task<string> PublishAsync(byte[] message)

Publish a message to the topic specified in TopicName.

Parameter
Name	Description
message	byte The message to publish.

Returns
Type	Description
Taskstring	A task which completes once the message has been published. The task Result contains the message ID.

PublishAsync(string, ByteString)

public virtual Task<string> PublishAsync(string orderingKey, ByteString message)

Publish a message to the topic specified in TopicName.

Parameters
Name	Description
orderingKey	string The ordering key to use for this message.
message	ByteString The ByteString to publish.

Returns
Type	Description
Taskstring	A task which completes once the message has been published. The task Result contains the message ID.

PublishAsync(string, IMessage)

public virtual Task<string> PublishAsync(string orderingKey, IMessage message)

Publish a message to the topic specified in TopicName.

Parameters
Name	Description
orderingKey	string The ordering key to use for this message.
message	IMessage The message to publish.

Returns
Type	Description
Taskstring	A task which completes once the message has been published. The task Result contains the message ID.

PublishAsync(string, byte[])

public virtual Task<string> PublishAsync(string orderingKey, byte[] message)

Publish a message to the topic specified in TopicName.

Parameters
Name	Description
orderingKey	string The ordering key to use for this message.
message	byte The message to publish.

Returns
Type	Description
Taskstring	A task which completes once the message has been published. The task Result contains the message ID.

PublishAsync(string, string, Encoding)

public virtual Task<string> PublishAsync(string orderingKey, string message, Encoding encoding = null)

Publish a message to the topic specified in TopicName.

Parameters
Name	Description
orderingKey	string The ordering key to use for this message.
message	string The string to publish.
encoding	Encoding The encoding for string to byte conversion. If null, defaults to UTF8.

Returns
Type	Description
Taskstring	A task which completes once the message has been published. The task Result contains the message ID.

PublishAsync(string, Encoding)

public virtual Task<string> PublishAsync(string message, Encoding encoding = null)

Publish a message to the topic specified in TopicName.

Parameters
Name	Description
message	string The string to publish.
encoding	Encoding The encoding for string to byte conversion. If null, defaults to UTF8.

Returns
Type	Description
Taskstring	A task which completes once the message has been published. The task Result contains the message ID.

ResumePublish(string)

public virtual void ResumePublish(string orderingKey)

Re-enable publishing the the given ordering key, after an error has caused the ordering key to be disabled.

Parameter
Name	Description
orderingKey	string The ordering key to re-enable.

ShutdownAsync(CancellationToken)

public virtual Task ShutdownAsync(CancellationToken hardStopToken)

Shutdown this PublisherClient. Cancelling hardStopToken aborts the clean shutdown process, and may leave some locally queued messages unsent. The returned Task completes when all queued messages have been published. The returned Task cancels if hardStopToken is cancelled.

Parameter
Name	Description
hardStopToken	CancellationToken Cancel this CancellationToken to abort publishing queued messages.

Returns
Type	Description
Task	A Task that completes when all queued messages have been published; or cancels if hardStopToken is cancelled.

ShutdownAsync(TimeSpan)

public virtual Task ShutdownAsync(TimeSpan timeout)

Shutdown this PublisherClient. If timeout expires, the clean shutdown process will abort; leaving some locally queued messages unsent. The returned Task completes when all queued messages have been published. The returned Task cancels if the timeout expires before all messages are published.

Parameter
Name	Description
timeout	TimeSpan After this period, abort publishing queued messages.

Returns
Type	Description
Task	A Task that completes when all queued messages have been published; or cancels if timeout expires.