SnsPublishProps

class aws_cdk.aws_stepfunctions_tasks.SnsPublishProps(*, comment=None, credentials=None, heartbeat=None, heartbeat_timeout=None, input_path=None, integration_pattern=None, output_path=None, result_path=None, result_selector=None, state_name=None, task_timeout=None, timeout=None, message, topic, message_attributes=None, message_deduplication_id=None, message_group_id=None, message_per_subscription_type=None, subject=None)

Bases: TaskStateBaseProps

Properties for publishing a message to an SNS topic.

Parameters:

  • comment (Optional[str]) – An optional description for this state. Default: - No comment

  • credentials (Union[Credentials, Dict[str, Any], None]) – Credentials for an IAM Role that the State Machine assumes for executing the task. This enables cross-account resource invocations. Default: - None (Task is executed using the State Machine’s execution role)

  • heartbeat (Optional[Duration]) – (deprecated) Timeout for the heartbeat. Default: - None

  • heartbeat_timeout (Optional[Timeout]) – Timeout for the heartbeat. [disable-awslint:duration-prop-type] is needed because all props interface in aws-stepfunctions-tasks extend this interface Default: - None

  • input_path (Optional[str]) – JSONPath expression to select part of the state to be the input to this state. May also be the special value JsonPath.DISCARD, which will cause the effective input to be the empty object {}. Default: - The entire task input (JSON path ‘$’)

  • integration_pattern (Optional[IntegrationPattern]) – AWS Step Functions integrates with services directly in the Amazon States Language. You can control these AWS services using service integration patterns. Depending on the AWS Service, the Service Integration Pattern availability will vary. Default: - IntegrationPattern.REQUEST_RESPONSE for most tasks. IntegrationPattern.RUN_JOB for the following exceptions: BatchSubmitJob, EmrAddStep, EmrCreateCluster, EmrTerminationCluster, and EmrContainersStartJobRun.

  • output_path (Optional[str]) – JSONPath expression to select select a portion of the state output to pass to the next state. May also be the special value JsonPath.DISCARD, which will cause the effective output to be the empty object {}. Default: - The entire JSON node determined by the state input, the task result, and resultPath is passed to the next state (JSON path ‘$’)

  • result_path (Optional[str]) – JSONPath expression to indicate where to inject the state’s output. May also be the special value JsonPath.DISCARD, which will cause the state’s input to become its output. Default: - Replaces the entire input with the result (JSON path ‘$’)

  • result_selector (Optional[Mapping[str, Any]]) – The JSON that will replace the state’s raw result and become the effective result before ResultPath is applied. You can use ResultSelector to create a payload with values that are static or selected from the state’s raw result. Default: - None

  • state_name (Optional[str]) – Optional name for this state. Default: - The construct ID will be used as state name

  • task_timeout (Optional[Timeout]) – Timeout for the task. [disable-awslint:duration-prop-type] is needed because all props interface in aws-stepfunctions-tasks extend this interface Default: - None

  • timeout (Optional[Duration]) – (deprecated) Timeout for the task. Default: - None

  • message (TaskInput) – The message you want to send. With the exception of SMS, messages must be UTF-8 encoded strings and at most 256 KB in size. For SMS, each message can contain up to 140 characters.

  • topic (ITopic) – The SNS topic that the task will publish to.

  • message_attributes (Optional[Mapping[str, Union[MessageAttribute, Dict[str, Any]]]]) – Add message attributes when publishing. These attributes carry additional metadata about the message and may be used for subscription filters. Default: {}

  • message_deduplication_id (Optional[str]) – This parameter applies only to FIFO topics. Every message must have a unique MessageDeduplicationId, which is a token used for deduplication of sent messages. If a message with a particular MessageDeduplicationId is sent successfully, any message sent with the same MessageDeduplicationId during the 5-minute deduplication interval is treated as a duplicate. If the topic has ContentBasedDeduplication set, the system generates a MessageDeduplicationId based on the contents of the message. Your MessageDeduplicationId overrides the generated one. Default: - Not used for standard topics, required for FIFO topics with ContentBasedDeduplication disabled.

  • message_group_id (Optional[str]) – This parameter applies only to FIFO topics. The MessageGroupId is a tag that specifies that a message belongs to a specific message group. Messages that belong to the same message group are processed in a FIFO manner (however, messages in different message groups might be processed out of order). Every message must include a MessageGroupId. Default: - Not used for standard topics, required for FIFO topics.

  • message_per_subscription_type (Optional[bool]) – Send different messages for each transport protocol. For example, you might want to send a shorter message to SMS subscribers and a more verbose message to email and SQS subscribers. Your message must be a JSON object with a top-level JSON key of “default” with a value that is a string You can define other top-level keys that define the message you want to send to a specific transport protocol (i.e. “sqs”, “email”, “http”, etc) Default: false

  • subject (Optional[str]) – Used as the “Subject” line when the message is delivered to email endpoints. This field will also be included, if present, in the standard JSON messages delivered to other endpoints. Default: - No subject

ExampleMetadata:

infused

Example:

convert_to_seconds = tasks.EvaluateExpression(self, "Convert to seconds",
    expression="$.waitMilliseconds / 1000",
    result_path="$.waitSeconds"
)

create_message = tasks.EvaluateExpression(self, "Create message",
    # Note: this is a string inside a string.
    expression="`Now waiting ${$.waitSeconds} seconds...`",
    runtime=lambda_.Runtime.NODEJS_LATEST,
    result_path="$.message"
)

publish_message = tasks.SnsPublish(self, "Publish message",
    topic=sns.Topic(self, "cool-topic"),
    message=sfn.TaskInput.from_json_path_at("$.message"),
    result_path="$.sns"
)

wait = sfn.Wait(self, "Wait",
    time=sfn.WaitTime.seconds_path("$.waitSeconds")
)

sfn.StateMachine(self, "StateMachine",
    definition=convert_to_seconds.next(create_message).next(publish_message).next(wait)
)

Attributes

comment

An optional description for this state.

Default:

  • No comment

credentials

Credentials for an IAM Role that the State Machine assumes for executing the task.

This enables cross-account resource invocations.

Default:

  • None (Task is executed using the State Machine’s execution role)

See:

https://docs.aws.amazon.com/step-functions/latest/dg/concepts-access-cross-acct-resources.html

heartbeat

(deprecated) Timeout for the heartbeat.

Default:

  • None

Deprecated:

use heartbeatTimeout

Stability:

deprecated

heartbeat_timeout

Timeout for the heartbeat.

[disable-awslint:duration-prop-type] is needed because all props interface in aws-stepfunctions-tasks extend this interface

Default:

  • None

input_path

JSONPath expression to select part of the state to be the input to this state.

May also be the special value JsonPath.DISCARD, which will cause the effective input to be the empty object {}.

Default:

  • The entire task input (JSON path ‘$’)

integration_pattern

AWS Step Functions integrates with services directly in the Amazon States Language.

You can control these AWS services using service integration patterns.

Depending on the AWS Service, the Service Integration Pattern availability will vary.

Default:

  • IntegrationPattern.REQUEST_RESPONSE for most tasks.

IntegrationPattern.RUN_JOB for the following exceptions: BatchSubmitJob, EmrAddStep, EmrCreateCluster, EmrTerminationCluster, and EmrContainersStartJobRun.

See:

https://docs.aws.amazon.com/step-functions/latest/dg/connect-supported-services.html

message

The message you want to send.

With the exception of SMS, messages must be UTF-8 encoded strings and at most 256 KB in size. For SMS, each message can contain up to 140 characters.

message_attributes

Add message attributes when publishing.

These attributes carry additional metadata about the message and may be used for subscription filters.

Default:

{}

See:

https://docs.aws.amazon.com/sns/latest/dg/sns-message-attributes.html

message_deduplication_id

This parameter applies only to FIFO topics.

Every message must have a unique MessageDeduplicationId, which is a token used for deduplication of sent messages. If a message with a particular MessageDeduplicationId is sent successfully, any message sent with the same MessageDeduplicationId during the 5-minute deduplication interval is treated as a duplicate.

If the topic has ContentBasedDeduplication set, the system generates a MessageDeduplicationId based on the contents of the message. Your MessageDeduplicationId overrides the generated one.

Default:

  • Not used for standard topics, required for FIFO topics with ContentBasedDeduplication disabled.

message_group_id

This parameter applies only to FIFO topics.

The MessageGroupId is a tag that specifies that a message belongs to a specific message group. Messages that belong to the same message group are processed in a FIFO manner (however, messages in different message groups might be processed out of order). Every message must include a MessageGroupId.

Default:

  • Not used for standard topics, required for FIFO topics.

message_per_subscription_type

Send different messages for each transport protocol.

For example, you might want to send a shorter message to SMS subscribers and a more verbose message to email and SQS subscribers.

Your message must be a JSON object with a top-level JSON key of “default” with a value that is a string You can define other top-level keys that define the message you want to send to a specific transport protocol (i.e. “sqs”, “email”, “http”, etc)

Default:

false

See:

https://docs.aws.amazon.com/sns/latest/api/API_Publish.html#API_Publish_RequestParameters

output_path

JSONPath expression to select select a portion of the state output to pass to the next state.

May also be the special value JsonPath.DISCARD, which will cause the effective output to be the empty object {}.

Default:

  • The entire JSON node determined by the state input, the task result,

and resultPath is passed to the next state (JSON path ‘$’)

result_path

JSONPath expression to indicate where to inject the state’s output.

May also be the special value JsonPath.DISCARD, which will cause the state’s input to become its output.

Default:

  • Replaces the entire input with the result (JSON path ‘$’)

result_selector

The JSON that will replace the state’s raw result and become the effective result before ResultPath is applied.

You can use ResultSelector to create a payload with values that are static or selected from the state’s raw result.

Default:

  • None

See:

https://docs.aws.amazon.com/step-functions/latest/dg/input-output-inputpath-params.html#input-output-resultselector

state_name

Optional name for this state.

Default:

  • The construct ID will be used as state name

subject

Used as the “Subject” line when the message is delivered to email endpoints.

This field will also be included, if present, in the standard JSON messages delivered to other endpoints.

Default:

  • No subject

task_timeout

Timeout for the task.

[disable-awslint:duration-prop-type] is needed because all props interface in aws-stepfunctions-tasks extend this interface

Default:

  • None

timeout

(deprecated) Timeout for the task.

Default:

  • None

Deprecated:

use taskTimeout

Stability:

deprecated

topic

The SNS topic that the task will publish to.