Apache Kafka Reset Connector Offsets

arazzo: 1.0.1
info:
  title: Apache Kafka Reset Connector Offsets
  summary: Stop a connector, snapshot its offsets, wipe them entirely, and resume from a clean slate.
  description: >-
    Distinct from rewinding to a chosen position, a reset deletes the
    connector's offsets outright so it starts over from its configured initial
    position — a full re-snapshot for a source connector, or a re-read from the
    consumer group's reset policy for a sink. Because this is destructive and
    irreversible from the API's side, the workflow snapshots the existing
    offsets first, and because Kafka Connect only permits offset changes on a
    STOPPED connector, it stops the connector before deleting. Every step spells
    out its request inline so the flow can be read and executed without opening
    the underlying OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: kafkaConnectApi
  url: ../openapi/kafka-connect.yml
  type: openapi
workflows:
- workflowId: reset-connector-offsets
  summary: Wipe a stopped connector's offsets and restart it from scratch.
  description: >-
    Stops the connector, snapshots offsets for the record, deletes them, and
    resumes the connector so it reprocesses from its initial position.
  inputs:
    type: object
    required:
    - connectorName
    properties:
      connectorName:
        type: string
        description: The name of the connector whose offsets are being reset.
  steps:
  - stepId: stopConnector
    description: >-
      Stop the connector. Kafka Connect will not reset offsets for a connector
      that is running or paused, only for one that is fully stopped.
    operationId: stopConnector
    parameters:
    - name: connector
      in: path
      value: $inputs.connectorName
    successCriteria:
    - condition: $statusCode == 204
  - stepId: snapshotOffsets
    description: >-
      Snapshot the offsets before they are deleted. The reset itself cannot be
      undone through the API, so this response is the only record of where the
      connector had reached.
    operationId: getConnectorOffsets
    parameters:
    - name: connector
      in: path
      value: $inputs.connectorName
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      offsetsBeforeReset: $response.body#/offsets
  - stepId: resetOffsets
    description: >-
      Delete the connector's offsets. On resume the connector behaves as if it
      had never run, reprocessing from its configured starting position.
    operationId: resetConnectorOffsets
    parameters:
    - name: connector
      in: path
      value: $inputs.connectorName
    successCriteria:
    - condition: $statusCode == 200
  - stepId: confirmCleared
    description: >-
      Read the offsets back while the connector is still stopped to confirm the
      reset cleared them before any reprocessing begins.
    operationId: getConnectorOffsets
    parameters:
    - name: connector
      in: path
      value: $inputs.connectorName
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      offsetsAfterReset: $response.body#/offsets
  - stepId: resumeConnector
    description: >-
      Resume the connector so it begins reprocessing from a clean slate.
    operationId: resumeConnector
    parameters:
    - name: connector
      in: path
      value: $inputs.connectorName
    successCriteria:
    - condition: $statusCode == 202
  - stepId: confirmReprocessing
    description: >-
      Confirm the connector came back healthy and is reprocessing rather than
      failing on its first poll after the reset.
    operationId: getConnectorStatus
    parameters:
    - name: connector
      in: path
      value: $inputs.connectorName
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      connectorState: $response.body#/connector/state
      taskStates: $response.body#/tasks
  outputs:
    offsetsBeforeReset: $steps.snapshotOffsets.outputs.offsetsBeforeReset
    offsetsAfterReset: $steps.confirmCleared.outputs.offsetsAfterReset
    connectorState: $steps.confirmReprocessing.outputs.connectorState