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OpenAPI Specification

openapi: 3.2.0
info:
  title: LittleHorse REST External Events Workflow Runs API
  description: The LittleHorse REST API provides HTTP endpoints for managing workflow specifications (WfSpec), workflow runs (WfRun), task definitions (TaskDef), external event definitions, user tasks, and other resources in the LittleHorse workflow engine.
  version: 0.12.0
  contact:
    name: LittleHorse
    url: https://littlehorse.dev/
  license:
    name: Server Side Public License
    url: https://www.mongodb.com/licensing/server-side-public-license
servers:
- url: '{baseUrl}'
  description: LittleHorse Server
  variables:
    baseUrl:
      default: http://localhost:2023
tags:
- name: Workflow Runs
paths:
  /wfRun:
    post:
      operationId: runWf
      summary: Run a workflow
      description: Starts a new workflow run based on a workflow specification.
      tags:
      - Workflow Runs
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/RunWfRequest'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/WfRun'
  /wfRun/{wfRunId}:
    get:
      operationId: getWfRun
      summary: Get a workflow run
      description: Returns details of a specific workflow run.
      tags:
      - Workflow Runs
      parameters:
      - name: wfRunId
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/WfRun'
    delete:
      operationId: deleteWfRun
      summary: Delete a workflow run
      description: Deletes a workflow run and its data.
      tags:
      - Workflow Runs
      parameters:
      - name: wfRunId
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: WfRun deleted
  /wfRun/{wfRunId}/stop:
    post:
      operationId: stopWfRun
      summary: Stop a workflow run
      description: Stops a running workflow.
      tags:
      - Workflow Runs
      parameters:
      - name: wfRunId
        in: path
        required: true
        schema:
          type: string
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                threadRunNumber:
                  type: integer
      responses:
        '200':
          description: WfRun stopped
  /wfRun/{wfRunId}/resume:
    post:
      operationId: resumeWfRun
      summary: Resume a workflow run
      description: Resumes a halted workflow run.
      tags:
      - Workflow Runs
      parameters:
      - name: wfRunId
        in: path
        required: true
        schema:
          type: string
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                threadRunNumber:
                  type: integer
      responses:
        '200':
          description: WfRun resumed
  /wfRun/search:
    get:
      operationId: searchWfRuns
      summary: Search workflow runs
      description: Search for workflow runs based on criteria.
      tags:
      - Workflow Runs
      parameters:
      - name: wfSpecName
        in: query
        schema:
          type: string
      - name: status
        in: query
        schema:
          type: string
          enum:
          - RUNNING
          - COMPLETED
          - HALTING
          - HALTED
          - ERROR
      - name: limit
        in: query
        schema:
          type: integer
      - name: bookmark
        in: query
        schema:
          type: string
      responses:
        '200':
          description: Successful response
components:
  schemas:
    RunWfRequest:
      type: object
      required:
      - wfSpecName
      properties:
        wfSpecName:
          type: string
        majorVersion:
          type: integer
        revision:
          type: integer
        id:
          type: string
        variables:
          type: object
        parentWfRunId:
          type: string
    WfRun:
      type: object
      properties:
        id:
          type: string
        wfSpecId:
          type: object
          properties:
            name:
              type: string
            majorVersion:
              type: integer
            revision:
              type: integer
        status:
          type: string
          enum:
          - RUNNING
          - COMPLETED
          - HALTING
          - HALTED
          - ERROR
        startTime:
          type: string
          format: date-time
        endTime:
          type: string
          format: date-time
        threadRuns:
          type: array
          items:
            type: object
        pendingInterrupts:
          type: array
          items:
            type: object
        pendingFailures:
          type: array
          items:
            type: object