arazzo: 1.0.1
info:
  title: Amazon EventBridge Provision Event Bus Routing
  summary: Stand up a custom event bus, attach a rule, wire targets, and confirm the wiring.
  description: >-
    Provisions an end-to-end routing path on Amazon EventBridge. The workflow
    creates a custom event bus, adds a rule that matches an event pattern on
    that bus, attaches one or more targets to the rule, and then reads the
    targets back to confirm they were registered. 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: provision-event-bus-routing
  summary: Create an event bus, add a rule, attach targets, and verify them.
  description: >-
    Creates a custom event bus, defines a pattern-matching rule on that bus,
    attaches the supplied targets to the rule, and then lists the targets back
    to confirm the routing is in place.
  inputs:
    type: object
    required:
    - eventBusName
    - ruleName
    - eventPattern
    - targets
    properties:
      eventBusName:
        type: string
        description: The name of the custom event bus to create.
      ruleName:
        type: string
        description: The name of the rule to create on the event bus.
      eventPattern:
        type: string
        description: The event pattern (JSON string) the rule matches against.
      ruleDescription:
        type: string
        description: An optional human-readable description for the rule.
      targets:
        type: array
        description: The list of Target objects to attach to the rule.
        items:
          type: object
  steps:
  - stepId: createEventBus
    description: Create the custom event bus that will host the routing rule.
    operationId: CreateEventBus
    parameters:
    - name: X-Amz-Target
      in: header
      value: AWSEvents.CreateEventBus
    requestBody:
      contentType: application/x-amz-json-1.1
      payload:
        Name: $inputs.eventBusName
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      eventBusArn: $response.body#/EventBusArn
  - stepId: putRule
    description: >-
      Create a rule on the new event bus that matches the supplied event
      pattern and is enabled immediately.
    operationId: PutRule
    parameters:
    - name: X-Amz-Target
      in: header
      value: AWSEvents.PutRule
    requestBody:
      contentType: application/x-amz-json-1.1
      payload:
        Name: $inputs.ruleName
        Description: $inputs.ruleDescription
        EventPattern: $inputs.eventPattern
        EventBusName: $inputs.eventBusName
        State: ENABLED
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      ruleArn: $response.body#/RuleArn
  - stepId: putTargets
    description: Attach the supplied targets to the rule on the event bus.
    operationId: PutTargets
    parameters:
    - name: X-Amz-Target
      in: header
      value: AWSEvents.PutTargets
    requestBody:
      contentType: application/x-amz-json-1.1
      payload:
        Rule: $inputs.ruleName
        EventBusName: $inputs.eventBusName
        Targets: $inputs.targets
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      failedEntryCount: $response.body#/FailedEntryCount
      failedEntries: $response.body#/FailedEntries
  - stepId: listTargets
    description: Read the targets back from the rule to confirm they registered.
    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:
      registeredTargets: $response.body#/Targets
  outputs:
    eventBusArn: $steps.createEventBus.outputs.eventBusArn
    ruleArn: $steps.putRule.outputs.ruleArn
    registeredTargets: $steps.listTargets.outputs.registeredTargets