CallAwsServiceProps

class aws_cdk.aws_stepfunctions_tasks.CallAwsServiceProps(*, comment=None, heartbeat=None, input_path=None, integration_pattern=None, output_path=None, result_path=None, result_selector=None, timeout=None, action, iam_resources, service, iam_action=None, parameters=None)

Bases: aws_cdk.aws_stepfunctions.TaskStateBaseProps

Properties for calling an AWS service’s API action from your state machine.

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

  • heartbeat (Optional[Duration]) – Timeout for the heartbeat. 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 Default: IntegrationPattern.REQUEST_RESPONSE

  • 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

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

  • action (str) – The API action to call. Use camelCase.

  • iam_resources (Sequence[str]) – The resources for the IAM statement that will be added to the state machine role’s policy to allow the state machine to make the API call. By default the action for this IAM statement will be service:action.

  • service (str) – The AWS service to call.

  • iam_action (Optional[str]) – The action for the IAM statement that will be added to the state machine role’s policy to allow the state machine to make the API call. Use in the case where the IAM action name does not match with the API service/action name, e.g. s3:ListBuckets requires s3:ListAllMyBuckets. Default: - service:action

  • parameters (Optional[Mapping[str, Any]]) – Parameters for the API action call. Use PascalCase for the parameter names. Default: - no parameters

See

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

Example:

# my_bucket is of type Bucket

get_object = tasks.CallAwsService(self, "GetObject",
    service="s3",
    action="getObject",
    parameters={
        "Bucket": my_bucket.bucket_name,
        "Key": sfn.JsonPath.string_at("$.key")
    },
    iam_resources=[my_bucket.arn_for_objects("*")]
)

Attributes

action

The API action to call.

Use camelCase.

Return type

str

comment

An optional description for this state.

Default
  • No comment

Return type

Optional[str]

heartbeat

Timeout for the heartbeat.

Default
  • None

Return type

Optional[Duration]

iam_action

The action for the IAM statement that will be added to the state machine role’s policy to allow the state machine to make the API call.

Use in the case where the IAM action name does not match with the API service/action name, e.g. s3:ListBuckets requires s3:ListAllMyBuckets.

Default
Return type

Optional[str]

iam_resources

The resources for the IAM statement that will be added to the state machine role’s policy to allow the state machine to make the API call.

By default the action for this IAM statement will be service:action.

Return type

List[str]

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 ‘$’)

Return type

Optional[str]

integration_pattern

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

You can control these AWS services using service integration patterns

Default

IntegrationPattern.REQUEST_RESPONSE

See

https://docs.aws.amazon.com/step-functions/latest/dg/connect-to-resource.html#connect-wait-token

Return type

Optional[IntegrationPattern]

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 ‘$’)

Return type

Optional[str]

parameters

Parameters for the API action call.

Use PascalCase for the parameter names.

Default
  • no parameters

Return type

Optional[Mapping[str, Any]]

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 ‘$’)

Return type

Optional[str]

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

Return type

Optional[Mapping[str, Any]]

service

The AWS service to call.

See

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

Return type

str

timeout

Timeout for the state machine.

Default
  • None

Return type

Optional[Duration]