L2 Construct

LambdaInvoke

Invoke a Lambda function as a Task.

Import

import { LambdaInvoke } from 'aws-cdk-lib/aws-stepfunctions-tasks';

Or use the module namespace:

import * as stepfunctions_tasks from 'aws-cdk-lib/aws-stepfunctions-tasks';
// stepfunctions_tasks.LambdaInvoke

Properties

Configuration passed to the constructor as LambdaInvokeProps.

lambdaFunctionRequired

IFunction

Lambda function to invoke.

clientContextOptional

string

Up to 3583 bytes of base64-encoded data about the invoking client to pass to the function.

Default: - No context

invocationTypeOptional

LambdaInvocationType

Invocation type of the Lambda function.

Default: InvocationType.REQUEST_RESPONSE

payloadOptional

TaskInput

The JSON that will be supplied as input to the Lambda function.

Default: - The state input (JSONata: '{% $states.input %}', JSONPath: '$')

payloadResponseOnlyOptional

boolean

Invoke the Lambda in a way that only returns the payload response without additional metadata. The `payloadResponseOnly` property cannot be used if `integrationPattern`, `invocationType`, `clientContext`, or `qualifier` are specified. It always uses the REQUEST_RESPONSE behavior.

Default: false

qualifierOptionalDeprecated

string

Version or alias to invoke a published version of the function. You only need to supply this if you want the version of the Lambda Function to depend on data in the state machine state. If not, you can pass the appropriate Alias or Version object directly as the `lambdaFunction` argument.

Default: - Version or alias inherent to the `lambdaFunction` object.

Deprecated: pass a Version or Alias object as lambdaFunction instead

retryOnServiceExceptionsOptional

boolean

Whether to retry on Lambda service exceptions. This handles `Lambda.ServiceException`, `Lambda.AWSLambdaException`, `Lambda.SdkClientException`, and `Lambda.ClientExecutionTimeoutException` with an interval of 2 seconds, a back-off rate of 2 and 6 maximum attempts.

Default: true

2 properties inherited from TaskStateBaseProps

resultPathOptionalinherited from TaskStateBaseProps

string

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: $

resultSelectorOptionalinherited from TaskStateBaseProps

{ [key: string]: 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

3 properties inherited from StateBaseProps

commentOptionalinherited from StateBaseProps

string

A comment describing this state.

Default: No comment

queryLanguageOptionalinherited from StateBaseProps

QueryLanguage

The name of the query language used by the state. If the state does not contain a `queryLanguage` field, then it will use the query language specified in the top-level `queryLanguage` field.

Default: - JSONPath

stateNameOptionalinherited from StateBaseProps

string

Optional name for this state.

Default: - The construct ID will be used as state name

6 properties inherited from TaskStateBaseOptions

credentialsOptionalinherited from TaskStateBaseOptions

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)

heartbeatOptionalDeprecatedinherited from TaskStateBaseOptions

Duration

Timeout for the heartbeat.

Default: - None

Deprecated: use `heartbeatTimeout`

heartbeatTimeoutOptionalinherited from TaskStateBaseOptions

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

integrationPatternOptionalinherited from TaskStateBaseOptions

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`.

taskTimeoutOptionalinherited from TaskStateBaseOptions

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

timeoutOptionalDeprecatedinherited from TaskStateBaseOptions

Duration

Timeout for the task.

Default: - None

Deprecated: use `taskTimeout`

1 property inherited from AssignableStateOptions

assignOptionalinherited from AssignableStateOptions

{ [key: string]: any }

Workflow variables to store in this step. Using workflow variables, you can store data in a step and retrieve that data in future steps.

Default: - Not assign variables

2 properties inherited from JsonPathCommonOptions

inputPathOptionalinherited from JsonPathCommonOptions

string

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: $

outputPathOptionalinherited from JsonPathCommonOptions

string

JSONPath expression to select part of the state to be the output to this state. May also be the special value JsonPath.DISCARD, which will cause the effective output to be the empty object {}.

Default: $

1 property inherited from JsonataCommonOptions

outputsOptionalinherited from JsonataCommonOptions

any

Used to specify and transform output from the state. When specified, the value overrides the state output default. The output field accepts any JSON value (object, array, string, number, boolean, null). Any string value, including those inside objects or arrays, will be evaluated as JSONata if surrounded by {% %} characters. Output also accepts a JSONata expression directly.

Default: - $states.result or $states.errorOutput

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Quick Facts

LevelL2 (Higher-level)

Moduleaws-stepfunctions-tasks

Properties22

Related Constructs

External Links

CDK API Documentation