com.amazonaws.services.simpleworkflow.model

Class PollForDecisionTaskRequest

java.lang.Object

com.amazonaws.AmazonWebServiceRequest

com.amazonaws.services.simpleworkflow.model.PollForDecisionTaskRequest

All Implemented Interfaces:

Serializable

public class PollForDecisionTaskRequest
extends AmazonWebServiceRequest
implements Serializable

Container for the parameters to the PollForDecisionTask operation.

Used by deciders to get a DecisionTask from the specified decision taskList . A decision task may be returned for any open workflow execution that is using the specified task list. The task includes a paginated view of the history of the workflow execution. The decider should use the workflow type and the history to determine how to properly handle the task.

This action initiates a long poll, where the service holds the HTTP connection open and responds as soon a task becomes available. If no decision task is available in the specified task list before the timeout of 60 seconds expires, an empty result is returned. An empty result, in this context, means that a DecisionTask is returned, but that the value of taskToken is an empty string.

IMPORTANT: Deciders should set their client side socket timeout to at least 70 seconds (10 seconds higher than the timeout).

IMPORTANT: Because the number of workflow history events for a single workflow execution might be very large, the result returned might be split up across a number of pages. To retrieve subsequent pages, make additional calls to PollForDecisionTask using the nextPageToken returned by the initial call. Note that you do not call GetWorkflowExecutionHistory with this nextPageToken. Instead, call PollForDecisionTask again.

Access Control

You can use IAM policies to control this action's access to Amazon SWF resources as follows:

• Use a Resource element with the domain name to limit the action to only specified domains.
• Use an Action element to allow or deny permission to call this action.
• Use a Condition element with the swf:taskList.name key to allow the action to access only certain task lists.

If the caller does not have sufficient permissions to invoke the action, or the parameter values fall outside the specified constraints, the action fails by throwing OperationNotPermitted . For details and example IAM policies, see Using IAM to Manage Access to Amazon SWF Workflows .

See Also:

AmazonSimpleWorkflow.pollForDecisionTask(PollForDecisionTaskRequest), Serialized Form

Field Summary

Fields inherited from class com.amazonaws.AmazonWebServiceRequest

NOOP

Constructor Summary

Constructors

Constructor and Description
PollForDecisionTaskRequest()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object obj)
String	getDomain() The name of the domain containing the task lists to poll.
String	getIdentity() Identity of the decider making the request, which is recorded in the DecisionTaskStarted event in the workflow history.
Integer	getMaximumPageSize() The maximum number of history events returned in each page.
String	getNextPageToken() If on a previous call to this method a NextPageToken was returned, the results are being paginated.
Boolean	getReverseOrder() When set to true, returns the events in reverse order.
TaskList	getTaskList() Specifies the task list to poll for decision tasks.
int	hashCode()
Boolean	isReverseOrder() When set to true, returns the events in reverse order.
void	setDomain(String domain) The name of the domain containing the task lists to poll.
void	setIdentity(String identity) Identity of the decider making the request, which is recorded in the DecisionTaskStarted event in the workflow history.
void	setMaximumPageSize(Integer maximumPageSize) The maximum number of history events returned in each page.
void	setNextPageToken(String nextPageToken) If on a previous call to this method a NextPageToken was returned, the results are being paginated.
void	setReverseOrder(Boolean reverseOrder) When set to true, returns the events in reverse order.
void	setTaskList(TaskList taskList) Specifies the task list to poll for decision tasks.
String	toString() Returns a string representation of this object; useful for testing and debugging.
PollForDecisionTaskRequest	withDomain(String domain) The name of the domain containing the task lists to poll.
PollForDecisionTaskRequest	withIdentity(String identity) Identity of the decider making the request, which is recorded in the DecisionTaskStarted event in the workflow history.
PollForDecisionTaskRequest	withMaximumPageSize(Integer maximumPageSize) The maximum number of history events returned in each page.
PollForDecisionTaskRequest	withNextPageToken(String nextPageToken) If on a previous call to this method a NextPageToken was returned, the results are being paginated.
PollForDecisionTaskRequest	withReverseOrder(Boolean reverseOrder) When set to true, returns the events in reverse order.
PollForDecisionTaskRequest	withTaskList(TaskList taskList) Specifies the task list to poll for decision tasks.

Methods inherited from class com.amazonaws.AmazonWebServiceRequest

copyPrivateRequestParameters, getGeneralProgressListener, getRequestClientOptions, getRequestCredentials, getRequestMetricCollector, setGeneralProgressListener, setRequestCredentials, setRequestMetricCollector, withGeneralProgressListener, withRequestMetricCollector

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

PollForDecisionTaskRequest

public PollForDecisionTaskRequest()

Method Detail

getDomain

public String getDomain()

The name of the domain containing the task lists to poll.

Constraints:
Length: 1 - 256

Returns:

The name of the domain containing the task lists to poll.

setDomain

public void setDomain(String domain)

The name of the domain containing the task lists to poll.

Constraints:
Length: 1 - 256

Parameters:

domain - The name of the domain containing the task lists to poll.

withDomain

public PollForDecisionTaskRequest withDomain(String domain)

The name of the domain containing the task lists to poll.

Returns a reference to this object so that method calls can be chained together.

Constraints:
Length: 1 - 256

Parameters:

domain - The name of the domain containing the task lists to poll.

Returns:

A reference to this updated object so that method calls can be chained together.

getTaskList

public TaskList getTaskList()

Specifies the task list to poll for decision tasks.

The specified string must not start or end with whitespace. It must not contain a : (colon), / (slash), | (vertical bar), or any control characters (- |  - Ÿ). Also, it must not contain the literal string "arn".

Returns:

Specifies the task list to poll for decision tasks.

The specified string must not start or end with whitespace. It must not contain a : (colon), / (slash), | (vertical bar), or any control characters (- |  - Ÿ). Also, it must not contain the literal string "arn".

setTaskList

public void setTaskList(TaskList taskList)

Specifies the task list to poll for decision tasks.

The specified string must not start or end with whitespace. It must not contain a : (colon), / (slash), | (vertical bar), or any control characters (- |  - Ÿ). Also, it must not contain the literal string "arn".

Parameters:

taskList - Specifies the task list to poll for decision tasks.

The specified string must not start or end with whitespace. It must not contain a : (colon), / (slash), | (vertical bar), or any control characters (- |  - Ÿ). Also, it must not contain the literal string "arn".

withTaskList

public PollForDecisionTaskRequest withTaskList(TaskList taskList)

Specifies the task list to poll for decision tasks.

The specified string must not start or end with whitespace. It must not contain a : (colon), / (slash), | (vertical bar), or any control characters (- |  - Ÿ). Also, it must not contain the literal string "arn".

Returns a reference to this object so that method calls can be chained together.

Parameters:

taskList - Specifies the task list to poll for decision tasks.

The specified string must not start or end with whitespace. It must not contain a : (colon), / (slash), | (vertical bar), or any control characters (- |  - Ÿ). Also, it must not contain the literal string "arn".

Returns:

A reference to this updated object so that method calls can be chained together.

getIdentity

public String getIdentity()

Identity of the decider making the request, which is recorded in the DecisionTaskStarted event in the workflow history. This enables diagnostic tracing when problems arise. The form of this identity is user defined.

Constraints:
Length: 0 - 256

Returns:

Identity of the decider making the request, which is recorded in the DecisionTaskStarted event in the workflow history. This enables diagnostic tracing when problems arise. The form of this identity is user defined.

setIdentity

public void setIdentity(String identity)

Identity of the decider making the request, which is recorded in the DecisionTaskStarted event in the workflow history. This enables diagnostic tracing when problems arise. The form of this identity is user defined.

Constraints:
Length: 0 - 256

Parameters:

identity - Identity of the decider making the request, which is recorded in the DecisionTaskStarted event in the workflow history. This enables diagnostic tracing when problems arise. The form of this identity is user defined.

withIdentity

public PollForDecisionTaskRequest withIdentity(String identity)

Identity of the decider making the request, which is recorded in the DecisionTaskStarted event in the workflow history. This enables diagnostic tracing when problems arise. The form of this identity is user defined.

Returns a reference to this object so that method calls can be chained together.

Constraints:
Length: 0 - 256

Parameters:

identity - Identity of the decider making the request, which is recorded in the DecisionTaskStarted event in the workflow history. This enables diagnostic tracing when problems arise. The form of this identity is user defined.

Returns:

A reference to this updated object so that method calls can be chained together.

getNextPageToken

public String getNextPageToken()

If on a previous call to this method a NextPageToken was returned, the results are being paginated. To get the next page of results, repeat the call with the returned token and all other arguments unchanged. The nextPageToken returned by this action cannot be used with GetWorkflowExecutionHistory to get the next page. You must call PollForDecisionTask again (with the nextPageToken) to retrieve the next page of history records. Calling PollForDecisionTask with a nextPageToken will not return a new decision task..

Constraints:
Length: 0 - 2048

Returns:

If on a previous call to this method a NextPageToken was returned, the results are being paginated. To get the next page of results, repeat the call with the returned token and all other arguments unchanged. The nextPageToken returned by this action cannot be used with GetWorkflowExecutionHistory to get the next page. You must call PollForDecisionTask again (with the nextPageToken) to retrieve the next page of history records. Calling PollForDecisionTask with a nextPageToken will not return a new decision task..

setNextPageToken

public void setNextPageToken(String nextPageToken)

If on a previous call to this method a NextPageToken was returned, the results are being paginated. To get the next page of results, repeat the call with the returned token and all other arguments unchanged. The nextPageToken returned by this action cannot be used with GetWorkflowExecutionHistory to get the next page. You must call PollForDecisionTask again (with the nextPageToken) to retrieve the next page of history records. Calling PollForDecisionTask with a nextPageToken will not return a new decision task..

Constraints:
Length: 0 - 2048

Parameters:

nextPageToken - If on a previous call to this method a NextPageToken was returned, the results are being paginated. To get the next page of results, repeat the call with the returned token and all other arguments unchanged. The nextPageToken returned by this action cannot be used with GetWorkflowExecutionHistory to get the next page. You must call PollForDecisionTask again (with the nextPageToken) to retrieve the next page of history records. Calling PollForDecisionTask with a nextPageToken will not return a new decision task..

withNextPageToken

public PollForDecisionTaskRequest withNextPageToken(String nextPageToken)

If on a previous call to this method a NextPageToken was returned, the results are being paginated. To get the next page of results, repeat the call with the returned token and all other arguments unchanged. The nextPageToken returned by this action cannot be used with GetWorkflowExecutionHistory to get the next page. You must call PollForDecisionTask again (with the nextPageToken) to retrieve the next page of history records. Calling PollForDecisionTask with a nextPageToken will not return a new decision task..

Returns a reference to this object so that method calls can be chained together.

Constraints:
Length: 0 - 2048

Parameters:

nextPageToken - If on a previous call to this method a NextPageToken was returned, the results are being paginated. To get the next page of results, repeat the call with the returned token and all other arguments unchanged. The nextPageToken returned by this action cannot be used with GetWorkflowExecutionHistory to get the next page. You must call PollForDecisionTask again (with the nextPageToken) to retrieve the next page of history records. Calling PollForDecisionTask with a nextPageToken will not return a new decision task..

Returns:

A reference to this updated object so that method calls can be chained together.

getMaximumPageSize

public Integer getMaximumPageSize()

The maximum number of history events returned in each page. The default is 100, but the caller can override this value to a page size smaller than the default. You cannot specify a page size greater than 100. Note that the number of events may be less than the maxiumum page size, in which case, the returned page will have fewer results than the maximumPageSize specified.

Constraints:
Range: 0 - 1000

Returns:

The maximum number of history events returned in each page. The default is 100, but the caller can override this value to a page size smaller than the default. You cannot specify a page size greater than 100. Note that the number of events may be less than the maxiumum page size, in which case, the returned page will have fewer results than the maximumPageSize specified.

setMaximumPageSize

public void setMaximumPageSize(Integer maximumPageSize)

The maximum number of history events returned in each page. The default is 100, but the caller can override this value to a page size smaller than the default. You cannot specify a page size greater than 100. Note that the number of events may be less than the maxiumum page size, in which case, the returned page will have fewer results than the maximumPageSize specified.

Constraints:
Range: 0 - 1000

Parameters:

maximumPageSize - The maximum number of history events returned in each page. The default is 100, but the caller can override this value to a page size smaller than the default. You cannot specify a page size greater than 100. Note that the number of events may be less than the maxiumum page size, in which case, the returned page will have fewer results than the maximumPageSize specified.

withMaximumPageSize

public PollForDecisionTaskRequest withMaximumPageSize(Integer maximumPageSize)

The maximum number of history events returned in each page. The default is 100, but the caller can override this value to a page size smaller than the default. You cannot specify a page size greater than 100. Note that the number of events may be less than the maxiumum page size, in which case, the returned page will have fewer results than the maximumPageSize specified.

Returns a reference to this object so that method calls can be chained together.

Constraints:
Range: 0 - 1000

Parameters:

maximumPageSize - The maximum number of history events returned in each page. The default is 100, but the caller can override this value to a page size smaller than the default. You cannot specify a page size greater than 100. Note that the number of events may be less than the maxiumum page size, in which case, the returned page will have fewer results than the maximumPageSize specified.

Returns:

A reference to this updated object so that method calls can be chained together.

isReverseOrder

public Boolean isReverseOrder()

When set to true, returns the events in reverse order. By default the results are returned in ascending order of the eventTimestamp of the events.

Returns:

When set to true, returns the events in reverse order. By default the results are returned in ascending order of the eventTimestamp of the events.

setReverseOrder

public void setReverseOrder(Boolean reverseOrder)

When set to true, returns the events in reverse order. By default the results are returned in ascending order of the eventTimestamp of the events.

Parameters:

reverseOrder - When set to true, returns the events in reverse order. By default the results are returned in ascending order of the eventTimestamp of the events.

withReverseOrder

public PollForDecisionTaskRequest withReverseOrder(Boolean reverseOrder)

When set to true, returns the events in reverse order. By default the results are returned in ascending order of the eventTimestamp of the events.

Returns a reference to this object so that method calls can be chained together.

Parameters:

reverseOrder - When set to true, returns the events in reverse order. By default the results are returned in ascending order of the eventTimestamp of the events.

Returns:

A reference to this updated object so that method calls can be chained together.

getReverseOrder

public Boolean getReverseOrder()

When set to true, returns the events in reverse order. By default the results are returned in ascending order of the eventTimestamp of the events.

Returns:

When set to true, returns the events in reverse order. By default the results are returned in ascending order of the eventTimestamp of the events.

toString

public String toString()

Returns a string representation of this object; useful for testing and debugging.

Overrides:

toString in class Object

Returns:

A string representation of this object.

See Also:

Object.toString()

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object