cloudtasks

package
v0.24.0 Latest Latest
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 Go to latest Published: Jun 20, 2018 License: Apache-2.0 Imports: 14 Imported by: 0

Documentation

Overview

Package cloudtasks is an auto-generated package for the Cloud Tasks API. 

NOTE: This package is in alpha. It is not stable, and is likely to change.

Manages the execution of large numbers of distributed requests. Cloud Tasks is in Alpha.

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.

Types

type CallOptions 

type CallOptions struct {
	ListQueues         []gax.CallOption
	GetQueue           []gax.CallOption
	CreateQueue        []gax.CallOption
	UpdateQueue        []gax.CallOption
	DeleteQueue        []gax.CallOption
	PurgeQueue         []gax.CallOption
	PauseQueue         []gax.CallOption
	ResumeQueue        []gax.CallOption
	GetIamPolicy       []gax.CallOption
	SetIamPolicy       []gax.CallOption
	TestIamPermissions []gax.CallOption
	ListTasks          []gax.CallOption
	GetTask            []gax.CallOption
	CreateTask         []gax.CallOption
	DeleteTask         []gax.CallOption
	LeaseTasks         []gax.CallOption
	AcknowledgeTask    []gax.CallOption
	RenewLease         []gax.CallOption
	CancelLease        []gax.CallOption
	RunTask            []gax.CallOption
}

CallOptions contains the retry settings for each method of Client.

type Client 

type Client struct {

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

Client is a client for interacting with Cloud Tasks API.

Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.

func NewClient 

func NewClient(ctx context.Context, opts ...option.ClientOption) (*Client, error)

NewClient creates a new cloud tasks client.

Cloud Tasks allows developers to manage the execution of background work in their applications.

Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}
// TODO: Use client.
_ = c

Output:

func (*Client) AcknowledgeTask 

func (c *Client) AcknowledgeTask(ctx context.Context, req *taskspb.AcknowledgeTaskRequest, opts ...gax.CallOption) error

AcknowledgeTask acknowledges a pull task.

The worker, that is, the entity that [leased][google.cloud.tasks.v2beta2.CloudTasks.LeaseTasks] this task must call this method to indicate that the work associated with the task has finished.

The worker must acknowledge a task within the [lease_duration][google.cloud.tasks.v2beta2.LeaseTasksRequest.lease_duration] or the lease will expire and the task will become available to be leased again. After the task is acknowledged, it will not be returned by a later [LeaseTasks][google.cloud.tasks.v2beta2.CloudTasks.LeaseTasks], [GetTask][google.cloud.tasks.v2beta2.CloudTasks.GetTask], or [ListTasks][google.cloud.tasks.v2beta2.CloudTasks.ListTasks].

To acknowledge multiple tasks at the same time, use HTTP batching (at /storage/docs/json_api/v1/how-tos/batch) or the batching documentation for your client library, for example https://developers.google.com/api-client-library/python/guide/batch.

Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &taskspb.AcknowledgeTaskRequest{
	// TODO: Fill request struct fields.
}
err = c.AcknowledgeTask(ctx, req)
if err != nil {
	// TODO: Handle error.
}

Output:

func (*Client) CancelLease 

func (c *Client) CancelLease(ctx context.Context, req *taskspb.CancelLeaseRequest, opts ...gax.CallOption) (*taskspb.Task, error)

CancelLease cancel a pull task's lease.

The worker can use this method to cancel a task's lease by setting its [schedule_time][google.cloud.tasks.v2beta2.Task.schedule_time] to now. This will make the task available to be leased to the next caller of [LeaseTasks][google.cloud.tasks.v2beta2.CloudTasks.LeaseTasks].

Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &taskspb.CancelLeaseRequest{
	// TODO: Fill request struct fields.
}
resp, err := c.CancelLease(ctx, req)
if err != nil {
	// TODO: Handle error.
}
// TODO: Use resp.
_ = resp

Output:

func (*Client) Close 

func (c *Client) Close() error

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

func (*Client) Connection 

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

Connection returns the client's connection to the API service.

func (*Client) CreateQueue 

func (c *Client) CreateQueue(ctx context.Context, req *taskspb.CreateQueueRequest, opts ...gax.CallOption) (*taskspb.Queue, error)

CreateQueue creates a queue.

Queues created with this method allow tasks to live for a maximum of 31 days. After a task is 31 days old, the task will be deleted regardless of whether it was dispatched or not.

WARNING: Using this method may have unintended side effects if you are using an App Engine queue.yaml or queue.xml file to manage your queues. Read Overview of Queue Management and queue.yaml (at /cloud-tasks/docs/queue-yaml) before using this method.

Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &taskspb.CreateQueueRequest{
	// TODO: Fill request struct fields.
}
resp, err := c.CreateQueue(ctx, req)
if err != nil {
	// TODO: Handle error.
}
// TODO: Use resp.
_ = resp

Output:

func (*Client) CreateTask 

func (c *Client) CreateTask(ctx context.Context, req *taskspb.CreateTaskRequest, opts ...gax.CallOption) (*taskspb.Task, error)

CreateTask creates a task and adds it to a queue.

To add multiple tasks at the same time, use HTTP batching (at /storage/docs/json_api/v1/how-tos/batch) or the batching documentation for your client library, for example https://developers.google.com/api-client-library/python/guide/batch.

Tasks cannot be updated after creation; there is no UpdateTask command. 

For App Engine queues (at google.cloud.tasks.v2beta2.AppEngineHttpTarget),
the maximum task size is 100KB.

For pull queues (at google.cloud.tasks.v2beta2.PullTarget), this
the maximum task size is 1MB.
Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &taskspb.CreateTaskRequest{
	// TODO: Fill request struct fields.
}
resp, err := c.CreateTask(ctx, req)
if err != nil {
	// TODO: Handle error.
}
// TODO: Use resp.
_ = resp

Output:

func (*Client) DeleteQueue 

func (c *Client) DeleteQueue(ctx context.Context, req *taskspb.DeleteQueueRequest, opts ...gax.CallOption) error

DeleteQueue deletes a queue.

This command will delete the queue even if it has tasks in it.

Note: If you delete a queue, a queue with the same name can't be created for 7 days.

WARNING: Using this method may have unintended side effects if you are using an App Engine queue.yaml or queue.xml file to manage your queues. Read Overview of Queue Management and queue.yaml (at /cloud-tasks/docs/queue-yaml) before using this method.

Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &taskspb.DeleteQueueRequest{
	// TODO: Fill request struct fields.
}
err = c.DeleteQueue(ctx, req)
if err != nil {
	// TODO: Handle error.
}

Output:

func (*Client) DeleteTask 

func (c *Client) DeleteTask(ctx context.Context, req *taskspb.DeleteTaskRequest, opts ...gax.CallOption) error

DeleteTask deletes a task.

A task can be deleted if it is scheduled or dispatched. A task cannot be deleted if it has completed successfully or permanently failed.

Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &taskspb.DeleteTaskRequest{
	// TODO: Fill request struct fields.
}
err = c.DeleteTask(ctx, req)
if err != nil {
	// TODO: Handle error.
}

Output:

func (*Client) GetIamPolicy 

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

GetIamPolicy gets the access control policy for a [Queue][google.cloud.tasks.v2beta2.Queue]. Returns an empty policy if the resource exists and does not have a policy set.

Authorization requires the following Google IAM (at /iam) permission on the specified resource parent: 

cloudtasks.queues.getIamPolicy
Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &iampb.GetIamPolicyRequest{
	// TODO: Fill request struct fields.
}
resp, err := c.GetIamPolicy(ctx, req)
if err != nil {
	// TODO: Handle error.
}
// TODO: Use resp.
_ = resp

Output:

func (*Client) GetQueue 

func (c *Client) GetQueue(ctx context.Context, req *taskspb.GetQueueRequest, opts ...gax.CallOption) (*taskspb.Queue, error)

GetQueue gets a queue.

Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &taskspb.GetQueueRequest{
	// TODO: Fill request struct fields.
}
resp, err := c.GetQueue(ctx, req)
if err != nil {
	// TODO: Handle error.
}
// TODO: Use resp.
_ = resp

Output:

func (*Client) GetTask 

func (c *Client) GetTask(ctx context.Context, req *taskspb.GetTaskRequest, opts ...gax.CallOption) (*taskspb.Task, error)

GetTask gets a task.

Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &taskspb.GetTaskRequest{
	// TODO: Fill request struct fields.
}
resp, err := c.GetTask(ctx, req)
if err != nil {
	// TODO: Handle error.
}
// TODO: Use resp.
_ = resp

Output:

func (*Client) LeaseTasks 

func (c *Client) LeaseTasks(ctx context.Context, req *taskspb.LeaseTasksRequest, opts ...gax.CallOption) (*taskspb.LeaseTasksResponse, error)

LeaseTasks leases tasks from a pull queue for [lease_duration][google.cloud.tasks.v2beta2.LeaseTasksRequest.lease_duration].

This method is invoked by the worker to obtain a lease. The worker must acknowledge the task via [AcknowledgeTask][google.cloud.tasks.v2beta2.CloudTasks.AcknowledgeTask] after they have performed the work associated with the task.

The [payload][google.cloud.tasks.v2beta2.PullMessage.payload] is intended to store data that the worker needs to perform the work associated with the task. To return the payloads in the [response][google.cloud.tasks.v2beta2.LeaseTasksResponse], set [response_view][google.cloud.tasks.v2beta2.LeaseTasksRequest.response_view] to [FULL][google.cloud.tasks.v2beta2.Task.View.FULL].

A maximum of 10 qps of [LeaseTasks][google.cloud.tasks.v2beta2.CloudTasks.LeaseTasks] requests are allowed per queue. [RESOURCE_EXHAUSTED][google.rpc.Code.RESOURCE_EXHAUSTED] is returned when this limit is exceeded. [RESOURCE_EXHAUSTED][google.rpc.Code.RESOURCE_EXHAUSTED] is also returned when [max_tasks_dispatched_per_second][google.cloud.tasks.v2beta2.RateLimits.max_tasks_dispatched_per_second] is exceeded.

Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &taskspb.LeaseTasksRequest{
	// TODO: Fill request struct fields.
}
resp, err := c.LeaseTasks(ctx, req)
if err != nil {
	// TODO: Handle error.
}
// TODO: Use resp.
_ = resp

Output:

func (*Client) ListQueues 

func (c *Client) ListQueues(ctx context.Context, req *taskspb.ListQueuesRequest, opts ...gax.CallOption) *QueueIterator

ListQueues lists queues.

Queues are returned in lexicographical order.

Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &taskspb.ListQueuesRequest{
	// TODO: Fill request struct fields.
}
it := c.ListQueues(ctx, req)
for {
	resp, err := it.Next()
	if err == iterator.Done {
		break
	}
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*Client) ListTasks 

func (c *Client) ListTasks(ctx context.Context, req *taskspb.ListTasksRequest, opts ...gax.CallOption) *TaskIterator

ListTasks lists the tasks in a queue.

By default, only the [BASIC][google.cloud.tasks.v2beta2.Task.View.BASIC] view is retrieved due to performance considerations; [response_view][google.cloud.tasks.v2beta2.ListTasksRequest.response_view] controls the subset of information which is returned.

Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &taskspb.ListTasksRequest{
	// TODO: Fill request struct fields.
}
it := c.ListTasks(ctx, req)
for {
	resp, err := it.Next()
	if err == iterator.Done {
		break
	}
	if err != nil {
		// TODO: Handle error.
	}
	// TODO: Use resp.
	_ = resp
}

Output:

func (*Client) PauseQueue 

func (c *Client) PauseQueue(ctx context.Context, req *taskspb.PauseQueueRequest, opts ...gax.CallOption) (*taskspb.Queue, error)

PauseQueue pauses the queue.

If a queue is paused then the system will stop dispatching tasks until the queue is resumed via [ResumeQueue][google.cloud.tasks.v2beta2.CloudTasks.ResumeQueue]. Tasks can still be added when the queue is paused. A queue is paused if its [state][google.cloud.tasks.v2beta2.Queue.state] is [PAUSED][google.cloud.tasks.v2beta2.Queue.State.PAUSED].

Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &taskspb.PauseQueueRequest{
	// TODO: Fill request struct fields.
}
resp, err := c.PauseQueue(ctx, req)
if err != nil {
	// TODO: Handle error.
}
// TODO: Use resp.
_ = resp

Output:

func (*Client) PurgeQueue 

func (c *Client) PurgeQueue(ctx context.Context, req *taskspb.PurgeQueueRequest, opts ...gax.CallOption) (*taskspb.Queue, error)

PurgeQueue purges a queue by deleting all of its tasks.

All tasks created before this method is called are permanently deleted.

Purge operations can take up to one minute to take effect. Tasks might be dispatched before the purge takes effect. A purge is irreversible.

Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &taskspb.PurgeQueueRequest{
	// TODO: Fill request struct fields.
}
resp, err := c.PurgeQueue(ctx, req)
if err != nil {
	// TODO: Handle error.
}
// TODO: Use resp.
_ = resp

Output:

func (*Client) RenewLease 

func (c *Client) RenewLease(ctx context.Context, req *taskspb.RenewLeaseRequest, opts ...gax.CallOption) (*taskspb.Task, error)

RenewLease renew the current lease of a pull task.

The worker can use this method to extend the lease by a new duration, starting from now. The new task lease will be returned in the task's [schedule_time][google.cloud.tasks.v2beta2.Task.schedule_time].

Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &taskspb.RenewLeaseRequest{
	// TODO: Fill request struct fields.
}
resp, err := c.RenewLease(ctx, req)
if err != nil {
	// TODO: Handle error.
}
// TODO: Use resp.
_ = resp

Output:

func (*Client) ResumeQueue 

func (c *Client) ResumeQueue(ctx context.Context, req *taskspb.ResumeQueueRequest, opts ...gax.CallOption) (*taskspb.Queue, error)

ResumeQueue resume a queue.

This method resumes a queue after it has been [PAUSED][google.cloud.tasks.v2beta2.Queue.State.PAUSED] or [DISABLED][google.cloud.tasks.v2beta2.Queue.State.DISABLED]. The state of a queue is stored in the queue's [state][google.cloud.tasks.v2beta2.Queue.state]; after calling this method it will be set to [RUNNING][google.cloud.tasks.v2beta2.Queue.State.RUNNING].

WARNING: Resuming many high-QPS queues at the same time can lead to target overloading. If you are resuming high-QPS queues, follow the 500/50/5 pattern described in Managing Cloud Tasks Scaling Risks (at /cloud-tasks/pdfs/managing-cloud-tasks-scaling-risks-2017-06-05.pdf).

Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &taskspb.ResumeQueueRequest{
	// TODO: Fill request struct fields.
}
resp, err := c.ResumeQueue(ctx, req)
if err != nil {
	// TODO: Handle error.
}
// TODO: Use resp.
_ = resp

Output:

func (*Client) RunTask 

func (c *Client) RunTask(ctx context.Context, req *taskspb.RunTaskRequest, opts ...gax.CallOption) (*taskspb.Task, error)

RunTask forces a task to run now.

When this method is called, Cloud Tasks will dispatch the task, even if the task is already running, the queue has reached its [RateLimits][google.cloud.tasks.v2beta2.RateLimits] or is [PAUSED][google.cloud.tasks.v2beta2.Queue.State.PAUSED].

This command is meant to be used for manual debugging. For example, [RunTask][google.cloud.tasks.v2beta2.CloudTasks.RunTask] can be used to retry a failed task after a fix has been made or to manually force a task to be dispatched now.

The dispatched task is returned. That is, the task that is returned contains the [status][google.cloud.tasks.v2beta2.Task.status] after the task is dispatched but before the task is received by its target.

If Cloud Tasks receives a successful response from the task's target, then the task will be deleted; otherwise the task's [schedule_time][google.cloud.tasks.v2beta2.Task.schedule_time] will be reset to the time that [RunTask][google.cloud.tasks.v2beta2.CloudTasks.RunTask] was called plus the retry delay specified in the queue's [RetryConfig][google.cloud.tasks.v2beta2.RetryConfig].

[RunTask][google.cloud.tasks.v2beta2.CloudTasks.RunTask] returns [NOT_FOUND][google.rpc.Code.NOT_FOUND] when it is called on a task that has already succeeded or permanently failed.

[RunTask][google.cloud.tasks.v2beta2.CloudTasks.RunTask] cannot be called on a [pull task][google.cloud.tasks.v2beta2.PullMessage].

Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &taskspb.RunTaskRequest{
	// TODO: Fill request struct fields.
}
resp, err := c.RunTask(ctx, req)
if err != nil {
	// TODO: Handle error.
}
// TODO: Use resp.
_ = resp

Output:

func (*Client) SetIamPolicy 

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

SetIamPolicy sets the access control policy for a [Queue][google.cloud.tasks.v2beta2.Queue]. Replaces any existing policy.

Note: The Cloud Console does not check queue-level IAM permissions yet. Project-level permissions are required to use the Cloud Console.

Authorization requires the following Google IAM (at /iam) permission on the specified resource parent: 

cloudtasks.queues.setIamPolicy
Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &iampb.SetIamPolicyRequest{
	// TODO: Fill request struct fields.
}
resp, err := c.SetIamPolicy(ctx, req)
if err != nil {
	// TODO: Handle error.
}
// TODO: Use resp.
_ = resp

Output:

func (*Client) TestIamPermissions 

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

TestIamPermissions returns permissions that a caller has on a [Queue][google.cloud.tasks.v2beta2.Queue]. If the resource does not exist, this will return an empty set of permissions, not a [NOT_FOUND][google.rpc.Code.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 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &iampb.TestIamPermissionsRequest{
	// TODO: Fill request struct fields.
}
resp, err := c.TestIamPermissions(ctx, req)
if err != nil {
	// TODO: Handle error.
}
// TODO: Use resp.
_ = resp

Output:

func (*Client) UpdateQueue 

func (c *Client) UpdateQueue(ctx context.Context, req *taskspb.UpdateQueueRequest, opts ...gax.CallOption) (*taskspb.Queue, error)

UpdateQueue updates a queue.

This method creates the queue if it does not exist and updates the queue if it does exist.

Queues created with this method allow tasks to live for a maximum of 31 days. After a task is 31 days old, the task will be deleted regardless of whether it was dispatched or not.

WARNING: Using this method may have unintended side effects if you are using an App Engine queue.yaml or queue.xml file to manage your queues. Read Overview of Queue Management and queue.yaml (at /cloud-tasks/docs/queue-yaml) before using this method.

Example 
ctx := context.Background()
c, err := cloudtasks.NewClient(ctx)
if err != nil {
	// TODO: Handle error.
}

req := &taskspb.UpdateQueueRequest{
	// TODO: Fill request struct fields.
}
resp, err := c.UpdateQueue(ctx, req)
if err != nil {
	// TODO: Handle error.
}
// TODO: Use resp.
_ = resp

Output:

type QueueIterator 

type QueueIterator struct {

	// 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 []*taskspb.Queue, nextPageToken string, err error)
	// contains filtered or unexported fields
}

QueueIterator manages a stream of *taskspb.Queue.

func (*QueueIterator) Next 

func (it *QueueIterator) Next() (*taskspb.Queue, 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 (*QueueIterator) PageInfo 

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

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

type TaskIterator 

type TaskIterator struct {

	// 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 []*taskspb.Task, nextPageToken string, err error)
	// contains filtered or unexported fields
}

TaskIterator manages a stream of *taskspb.Task.

func (*TaskIterator) Next 

func (it *TaskIterator) Next() (*taskspb.Task, 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 (*TaskIterator) PageInfo 

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

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

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