Amazon EventBridge Decommission Rule

arazzo: 1.0.1
info:
  title: Amazon EventBridge Decommission Rule
  summary: List a rule's targets, remove them, then delete the rule cleanly.
  description: >-
    Tears down a rule in the order EventBridge requires: a rule cannot be
    deleted while it still has targets, so the workflow first lists the rule's
    targets, removes them by their IDs, and only then deletes the rule. Every
    step spells out its AWS JSON request inline — including the documented
    X-Amz-Target header — so the flow can be read and executed without opening
    the underlying OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: eventbridgeApi
  url: ../openapi/amazon-eventbridge-openapi.yml
  type: openapi
workflows:
- workflowId: decommission-rule
  summary: Remove a rule's targets and then delete the rule.
  description: >-
    Lists the targets on a rule, removes those targets by ID, and deletes the
    now-empty rule.
  inputs:
    type: object
    required:
    - ruleName
    - targetIds
    properties:
      ruleName:
        type: string
        description: The name of the rule to decommission.
      eventBusName:
        type: string
        description: The name or ARN of the event bus the rule lives on.
      targetIds:
        type: array
        description: The IDs of the targets to remove from the rule.
        items:
          type: string
  steps:
  - stepId: listTargets
    description: List the rule's current targets before removing them.
    operationId: ListTargetsByRule
    parameters:
    - name: X-Amz-Target
      in: header
      value: AWSEvents.ListTargetsByRule
    requestBody:
      contentType: application/x-amz-json-1.1
      payload:
        Rule: $inputs.ruleName
        EventBusName: $inputs.eventBusName
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      currentTargets: $response.body#/Targets
  - stepId: removeTargets
    description: Remove the supplied targets from the rule, forcing removal if needed.
    operationId: RemoveTargets
    parameters:
    - name: X-Amz-Target
      in: header
      value: AWSEvents.RemoveTargets
    requestBody:
      contentType: application/x-amz-json-1.1
      payload:
        Rule: $inputs.ruleName
        EventBusName: $inputs.eventBusName
        Ids: $inputs.targetIds
        Force: true
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      failedEntryCount: $response.body#/FailedEntryCount
  - stepId: deleteRule
    description: Delete the now-empty rule from the event bus.
    operationId: DeleteRule
    parameters:
    - name: X-Amz-Target
      in: header
      value: AWSEvents.DeleteRule
    requestBody:
      contentType: application/x-amz-json-1.1
      payload:
        Name: $inputs.ruleName
        EventBusName: $inputs.eventBusName
        Force: true
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      deleteStatus: $statusCode
  outputs:
    removedFromTargets: $steps.listTargets.outputs.currentTargets
    removeFailedEntryCount: $steps.removeTargets.outputs.failedEntryCount
    deleteStatus: $steps.deleteRule.outputs.deleteStatus