Interface CloudTasksGrpc.AsyncService (2.15.0)

Version 2.15.0

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public static interface CloudTasksGrpc.AsyncService

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

Methods

acknowledgeTask(AcknowledgeTaskRequest request, StreamObserver<Empty> responseObserver)

public default void acknowledgeTask(AcknowledgeTaskRequest request, StreamObserver<Empty> responseObserver)

Acknowledges a pull task. The worker, that is, the entity that leased 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 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, GetTask, or ListTasks.

Parameters
Name	Description
request	AcknowledgeTaskRequest
responseObserver	io.grpc.stub.StreamObserver<Empty>

cancelLease(CancelLeaseRequest request, StreamObserver<Task> responseObserver)

public default void cancelLease(CancelLeaseRequest request, StreamObserver<Task> responseObserver)

Cancel a pull task's lease. The worker can use this method to cancel a task's lease by setting its schedule_time to now. This will make the task available to be leased to the next caller of LeaseTasks.

Parameters
Name	Description
request	CancelLeaseRequest
responseObserver	io.grpc.stub.StreamObserver<Task>

createQueue(CreateQueueRequest request, StreamObserver<Queue> responseObserver)

public default void createQueue(CreateQueueRequest request, StreamObserver<Queue> responseObserver)

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 before using this method.

Parameters
Name	Description
request	CreateQueueRequest
responseObserver	io.grpc.stub.StreamObserver<Queue>

createTask(CreateTaskRequest request, StreamObserver<Task> responseObserver)

public default void createTask(CreateTaskRequest request, StreamObserver<Task> responseObserver)

Creates a task and adds it to a queue. Tasks cannot be updated after creation; there is no UpdateTask command.

• For App Engine queues, the maximum task size is 100KB.
• For pull queues, the maximum task size is 1MB.

Parameters
Name	Description
request	CreateTaskRequest
responseObserver	io.grpc.stub.StreamObserver<Task>

deleteQueue(DeleteQueueRequest request, StreamObserver<Empty> responseObserver)

public default void deleteQueue(DeleteQueueRequest request, StreamObserver<Empty> responseObserver)

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 before using this method.

Parameters
Name	Description
request	DeleteQueueRequest
responseObserver	io.grpc.stub.StreamObserver<Empty>

deleteTask(DeleteTaskRequest request, StreamObserver<Empty> responseObserver)

public default void deleteTask(DeleteTaskRequest request, StreamObserver<Empty> responseObserver)

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.

Parameters
Name	Description
request	DeleteTaskRequest
responseObserver	io.grpc.stub.StreamObserver<Empty>

getIamPolicy(GetIamPolicyRequest request, StreamObserver<Policy> responseObserver)

public default void getIamPolicy(GetIamPolicyRequest request, StreamObserver<Policy> responseObserver)

Gets the access control policy for a Queue. Returns an empty policy if the resource exists and does not have a policy set. Authorization requires the following Google IAM permission on the specified resource parent:

• cloudtasks.queues.getIamPolicy

Parameters
Name	Description
request	com.google.iam.v1.GetIamPolicyRequest
responseObserver	io.grpc.stub.StreamObserver<com.google.iam.v1.Policy>

getQueue(GetQueueRequest request, StreamObserver<Queue> responseObserver)

public default void getQueue(GetQueueRequest request, StreamObserver<Queue> responseObserver)

Gets a queue.

Parameters
Name	Description
request	GetQueueRequest
responseObserver	io.grpc.stub.StreamObserver<Queue>

getTask(GetTaskRequest request, StreamObserver<Task> responseObserver)

public default void getTask(GetTaskRequest request, StreamObserver<Task> responseObserver)

Gets a task.

Parameters
Name	Description
request	GetTaskRequest
responseObserver	io.grpc.stub.StreamObserver<Task>

leaseTasks(LeaseTasksRequest request, StreamObserver<LeaseTasksResponse> responseObserver)

public default void leaseTasks(LeaseTasksRequest request, StreamObserver<LeaseTasksResponse> responseObserver)

Leases tasks from a pull queue for lease_duration. This method is invoked by the worker to obtain a lease. The worker must acknowledge the task via AcknowledgeTask after they have performed the work associated with the task. The 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, set response_view to FULL. A maximum of 10 qps of LeaseTasks requests are allowed per queue. RESOURCE_EXHAUSTED is returned when this limit is exceeded. RESOURCE_EXHAUSTED is also returned when max_tasks_dispatched_per_second is exceeded.

Parameters
Name	Description
request	LeaseTasksRequest
responseObserver	io.grpc.stub.StreamObserver<LeaseTasksResponse>

listQueues(ListQueuesRequest request, StreamObserver<ListQueuesResponse> responseObserver)

public default void listQueues(ListQueuesRequest request, StreamObserver<ListQueuesResponse> responseObserver)

Lists queues. Queues are returned in lexicographical order.

Parameters
Name	Description
request	ListQueuesRequest
responseObserver	io.grpc.stub.StreamObserver<ListQueuesResponse>

listTasks(ListTasksRequest request, StreamObserver<ListTasksResponse> responseObserver)

public default void listTasks(ListTasksRequest request, StreamObserver<ListTasksResponse> responseObserver)

Lists the tasks in a queue. By default, only the BASIC view is retrieved due to performance considerations; response_view controls the subset of information which is returned. The tasks may be returned in any order. The ordering may change at any time.

Parameters
Name	Description
request	ListTasksRequest
responseObserver	io.grpc.stub.StreamObserver<ListTasksResponse>

pauseQueue(PauseQueueRequest request, StreamObserver<Queue> responseObserver)

public default void pauseQueue(PauseQueueRequest request, StreamObserver<Queue> responseObserver)

Pauses the queue. If a queue is paused then the system will stop dispatching tasks until the queue is resumed via ResumeQueue. Tasks can still be added when the queue is paused. A queue is paused if its state is PAUSED.

Parameters
Name	Description
request	PauseQueueRequest
responseObserver	io.grpc.stub.StreamObserver<Queue>

purgeQueue(PurgeQueueRequest request, StreamObserver<Queue> responseObserver)

public default void purgeQueue(PurgeQueueRequest request, StreamObserver<Queue> responseObserver)

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.

Parameters
Name	Description
request	PurgeQueueRequest
responseObserver	io.grpc.stub.StreamObserver<Queue>

renewLease(RenewLeaseRequest request, StreamObserver<Task> responseObserver)

public default void renewLease(RenewLeaseRequest request, StreamObserver<Task> responseObserver)

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.

Parameters
Name	Description
request	RenewLeaseRequest
responseObserver	io.grpc.stub.StreamObserver<Task>

resumeQueue(ResumeQueueRequest request, StreamObserver<Queue> responseObserver)

public default void resumeQueue(ResumeQueueRequest request, StreamObserver<Queue> responseObserver)

Resume a queue. This method resumes a queue after it has been PAUSED or DISABLED. The state of a queue is stored in the queue's state; after calling this method it will be set to 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.

Parameters
Name	Description
request	ResumeQueueRequest
responseObserver	io.grpc.stub.StreamObserver<Queue>

runTask(RunTaskRequest request, StreamObserver<Task> responseObserver)

public default void runTask(RunTaskRequest request, StreamObserver<Task> responseObserver)

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 or is PAUSED. This command is meant to be used for manual debugging. For example, 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 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 will be reset to the time that RunTask was called plus the retry delay specified in the queue's RetryConfig. RunTask returns NOT_FOUND when it is called on a task that has already succeeded or permanently failed. RunTask cannot be called on a pull task.

Parameters
Name	Description
request	RunTaskRequest
responseObserver	io.grpc.stub.StreamObserver<Task>

setIamPolicy(SetIamPolicyRequest request, StreamObserver<Policy> responseObserver)

public default void setIamPolicy(SetIamPolicyRequest request, StreamObserver<Policy> responseObserver)

Sets the access control policy for a 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 permission on the specified resource parent:

• cloudtasks.queues.setIamPolicy

Parameters
Name	Description
request	com.google.iam.v1.SetIamPolicyRequest
responseObserver	io.grpc.stub.StreamObserver<com.google.iam.v1.Policy>

testIamPermissions(TestIamPermissionsRequest request, StreamObserver<TestIamPermissionsResponse> responseObserver)

public default void testIamPermissions(TestIamPermissionsRequest request, StreamObserver<TestIamPermissionsResponse> responseObserver)

Returns permissions that a caller has on a Queue. 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.

Parameters
Name	Description
request	com.google.iam.v1.TestIamPermissionsRequest
responseObserver	io.grpc.stub.StreamObserver<com.google.iam.v1.TestIamPermissionsResponse>

updateQueue(UpdateQueueRequest request, StreamObserver<Queue> responseObserver)

public default void updateQueue(UpdateQueueRequest request, StreamObserver<Queue> responseObserver)

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 before using this method.

Parameters
Name	Description
request	UpdateQueueRequest
responseObserver	io.grpc.stub.StreamObserver<Queue>