EvaluateExpression
A Step Functions Task to evaluate an expression. OUTPUT: the output of this task is the evaluated expression.
Import
import { EvaluateExpression } 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.EvaluateExpressionProperties
Configuration passed to the constructor as EvaluateExpressionProps.
expressionRequiredstringThe expression to evaluate. The expression may contain state paths. Example value: `'$.a + $.b'`
architectureOptionalArchitectureThe system architecture compatible with this lambda function. ARM64 architecture support varies by AWS region. Please verify that your deployment region supports Lambda functions with ARM64 architecture before specifying Architecture.ARM_64.
Default: Architecture.X86_64
runtimeOptionalRuntimeThe runtime language to use to evaluate the expression.
Default: - the latest Lambda node runtime available in your region.
2 properties inherited from TaskStateBaseProps
resultPathOptionalinherited from TaskStateBasePropsstringJSONPath 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 StateBasePropsstringA comment describing this state.
Default: No comment
queryLanguageOptionalinherited from StateBasePropsQueryLanguageThe 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 StateBasePropsstringOptional name for this state.
Default: - The construct ID will be used as state name
6 properties inherited from TaskStateBaseOptions
credentialsOptionalinherited from TaskStateBaseOptionsCredentialsCredentials 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 TaskStateBaseOptionsDurationTimeout for the heartbeat.
Default: - None
Deprecated: use `heartbeatTimeout`
heartbeatTimeoutOptionalinherited from TaskStateBaseOptionsTimeoutTimeout 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 TaskStateBaseOptionsIntegrationPatternAWS 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 TaskStateBaseOptionsTimeoutTimeout 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 TaskStateBaseOptionsDurationTimeout 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 JsonPathCommonOptionsstringJSONPath 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 JsonPathCommonOptionsstringJSONPath 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 JsonataCommonOptionsanyUsed 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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aws-stepfunctions-tasks