L2 Construct

Map

Define a Map state in the state machine. A `Map` state can be used to run a set of steps for each element of an input array. A Map state will execute the same steps for multiple entries of an array in the state input. While the Parallel state executes multiple branches of steps using the same input, a Map state will execute the same steps for multiple entries of an array in the state input.

Import

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

Or use the module namespace:

import * as stepfunctions from 'aws-cdk-lib/aws-stepfunctions';
// stepfunctions.Map

Properties

Configuration passed to the constructor as MapProps.

parametersOptionalDeprecated

{ [key: string]: any }

The JSON that you want to override your default iteration input (mutually exclusive with `itemSelector`).

Default: $

Deprecated: Step Functions has deprecated the `parameters` field in favor of the new `itemSelector` field

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

4 properties inherited from MapBaseOptions

itemSelectorOptionalinherited from MapBaseOptions

{ [key: string]: any }

The JSON that you want to override your default iteration input (mutually exclusive with `parameters` and `jsonataItemSelector`).

Default: $

jsonataItemSelectorOptionalinherited from MapBaseOptions

string

Jsonata expression that evaluates to a JSON array to override your default iteration input (mutually exclusive with `parameters` and `itemSelector`). Example value: `{% {\"foo\": \"foo\", \"input\": $states.input} %}`

Default: $

jsonataMaxConcurrencyOptionalinherited from MapBaseOptions

string

JSONata expression for MaxConcurrency. A JSONata expression that evaluates to an integer, specifying the maximum concurrency dynamically. Mutually exclusive with `maxConcurrency` and `maxConcurrencyPath`. Example value: `{% $states.input.maxConcurrency %}`

Default: - full concurrency

maxConcurrencyOptionalinherited from MapBaseOptions

number

MaxConcurrency. An upper bound on the number of iterations you want running at once.

Default: - full concurrency

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

4 properties inherited from MapBaseJsonPathOptions

itemsPathOptionalinherited from MapBaseJsonPathOptions

string

JSONPath expression to select the array to iterate over.

Default: $

maxConcurrencyPathOptionalinherited from MapBaseJsonPathOptions

string

MaxConcurrencyPath. A JsonPath that specifies the maximum concurrency dynamically from the state input.

Default: - full concurrency

resultPathOptionalinherited from MapBaseJsonPathOptions

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 MapBaseJsonPathOptions

{ [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

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 MapBaseJsonataOptions

itemsOptionalinherited from MapBaseJsonataOptions

ProvideItems

The array that the Map state will iterate over.

Default: - The state input as is.

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

Properties17

Related Constructs

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External Links

CDK API Documentation