Google Cloud Tasks v2 API - Class Queue (3.4.0) 

public sealed class Queue : IMessage<Queue>, IEquatable<Queue>, IDeepCloneable<Queue>, IBufferMessage, IMessage

Reference documentation and code samples for the Google Cloud Tasks v2 API class Queue.

A queue is a container of related tasks. Queues are configured to manage how those tasks are dispatched. Configurable properties include rate limits, retry options, queue types, and others.

Inheritance

object > Queue

Namespace

Google.Cloud.Tasks.V2

Assembly

Google.Cloud.Tasks.V2.dll

Constructors

Queue()

public Queue()

Queue(Queue)

public Queue(Queue other)
Parameter
Name Description
other Queue

Properties

AppEngineRoutingOverride

public AppEngineRouting AppEngineRoutingOverride { get; set; }

Overrides for [task-level app_engine_routing][google.cloud.tasks.v2.AppEngineHttpRequest.app_engine_routing]. These settings apply only to [App Engine tasks][google.cloud.tasks.v2.AppEngineHttpRequest] in this queue. [Http tasks][google.cloud.tasks.v2.HttpRequest] are not affected.

If set, app_engine_routing_override is used for all [App Engine tasks][google.cloud.tasks.v2.AppEngineHttpRequest] in the queue, no matter what the setting is for the [task-level app_engine_routing][google.cloud.tasks.v2.AppEngineHttpRequest.app_engine_routing].

Property Value
Type Description
AppEngineRouting

Name

public string Name { get; set; }

Caller-specified and required in [CreateQueue][google.cloud.tasks.v2.CloudTasks.CreateQueue], after which it becomes output only.

The queue name.

The queue name must have the following format: projects/PROJECT_ID/locations/LOCATION_ID/queues/QUEUE_ID

  • PROJECT_ID can contain letters ([A-Za-z]), numbers ([0-9]), hyphens (-), colons (:), or periods (.). For more information, see Identifying projects
  • LOCATION_ID is the canonical ID for the queue's location. The list of available locations can be obtained by calling [ListLocations][google.cloud.location.Locations.ListLocations]. For more information, see https://cloud.google.com/about/locations/.
  • QUEUE_ID can contain letters ([A-Za-z]), numbers ([0-9]), or hyphens (-). The maximum length is 100 characters.
Property Value
Type Description
string

PurgeTime

public Timestamp PurgeTime { get; set; }

Output only. The last time this queue was purged.

All tasks that were [created][google.cloud.tasks.v2.Task.create_time] before this time were purged.

A queue can be purged using [PurgeQueue][google.cloud.tasks.v2.CloudTasks.PurgeQueue], the App Engine Task Queue SDK, or the Cloud Console.

Purge time will be truncated to the nearest microsecond. Purge time will be unset if the queue has never been purged.

Property Value
Type Description
Timestamp

QueueName

public QueueName QueueName { get; set; }

QueueName-typed view over the Name resource name property.

Property Value
Type Description
QueueName

RateLimits

public RateLimits RateLimits { get; set; }

Rate limits for task dispatches.

[rate_limits][google.cloud.tasks.v2.Queue.rate_limits] and [retry_config][google.cloud.tasks.v2.Queue.retry_config] are related because they both control task attempts. However they control task attempts in different ways:

  • [rate_limits][google.cloud.tasks.v2.Queue.rate_limits] controls the total rate of dispatches from a queue (i.e. all traffic dispatched from the queue, regardless of whether the dispatch is from a first attempt or a retry).
  • [retry_config][google.cloud.tasks.v2.Queue.retry_config] controls what happens to particular a task after its first attempt fails. That is, [retry_config][google.cloud.tasks.v2.Queue.retry_config] controls task retries (the second attempt, third attempt, etc).

The queue's actual dispatch rate is the result of:

  • Number of tasks in the queue
  • User-specified throttling: [rate_limits][google.cloud.tasks.v2.Queue.rate_limits], [retry_config][google.cloud.tasks.v2.Queue.retry_config], and the [queue's state][google.cloud.tasks.v2.Queue.state].
  • System throttling due to 429 (Too Many Requests) or 503 (Service Unavailable) responses from the worker, high error rates, or to smooth sudden large traffic spikes.
Property Value
Type Description
RateLimits

RetryConfig

public RetryConfig RetryConfig { get; set; }

Settings that determine the retry behavior.

  • For tasks created using Cloud Tasks: the queue-level retry settings apply to all tasks in the queue that were created using Cloud Tasks. Retry settings cannot be set on individual tasks.
  • For tasks created using the App Engine SDK: the queue-level retry settings apply to all tasks in the queue which do not have retry settings explicitly set on the task and were created by the App Engine SDK. See App Engine documentation.
Property Value
Type Description
RetryConfig

StackdriverLoggingConfig

public StackdriverLoggingConfig StackdriverLoggingConfig { get; set; }

Configuration options for writing logs to Stackdriver Logging. If this field is unset, then no logs are written.

Property Value
Type Description
StackdriverLoggingConfig

State

public Queue.Types.State State { get; set; }

Output only. The state of the queue.

state can only be changed by calling [PauseQueue][google.cloud.tasks.v2.CloudTasks.PauseQueue], [ResumeQueue][google.cloud.tasks.v2.CloudTasks.ResumeQueue], or uploading queue.yaml/xml. [UpdateQueue][google.cloud.tasks.v2.CloudTasks.UpdateQueue] cannot be used to change state.

Property Value
Type Description
QueueTypesState