openapi: 3.1.0
info:
  title: Eventuate REST Entities API
  description: The Eventuate REST API provides HTTP endpoints for managing aggregates, events, subscriptions, and event-sourced entities in the Eventuate platform for distributed data management in microservices.
  version: 1.0.0
  contact:
    name: Eventuate
    url: https://eventuate.io/
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
servers:
- url: '{baseUrl}'
  description: Eventuate Server
  variables:
    baseUrl:
      default: http://localhost:8080
tags:
- name: Entities
paths:
  /entity/{entityType}:
    post:
      operationId: createEntity
      summary: Create an entity
      description: Creates a new event-sourced aggregate entity with initial events.
      tags:
      - Entities
      parameters:
      - name: entityType
        in: path
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateEntityRequest'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CreateEntityResponse'
  /entity/{entityType}/{entityId}:
    get:
      operationId: getEntity
      summary: Get an entity
      description: Returns the current state and events of an aggregate entity.
      tags:
      - Entities
      parameters:
      - name: entityType
        in: path
        required: true
        schema:
          type: string
      - name: entityId
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/EntityWithEvents'
    post:
      operationId: updateEntity
      summary: Update an entity
      description: Updates an entity by appending new events.
      tags:
      - Entities
      parameters:
      - name: entityType
        in: path
        required: true
        schema:
          type: string
      - name: entityId
        in: path
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/UpdateEntityRequest'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/UpdateEntityResponse'
components:
  schemas:
    EventData:
      type: object
      required:
      - eventType
      - eventData
      properties:
        eventType:
          type: string
        eventData:
          type: string
    CreateEntityRequest:
      type: object
      required:
      - entityTypeName
      - events
      properties:
        entityTypeName:
          type: string
        events:
          type: array
          items:
            $ref: '#/components/schemas/EventData'
    UpdateEntityResponse:
      type: object
      properties:
        entityVersion:
          type: string
        eventIds:
          type: array
          items:
            type: string
    EntityWithEvents:
      type: object
      properties:
        entityId:
          type: string
        entityVersion:
          type: string
        events:
          type: array
          items:
            $ref: '#/components/schemas/Event'
    Event:
      type: object
      properties:
        id:
          type: string
        eventType:
          type: string
        eventData:
          type: string
        entityId:
          type: string
        metadata:
          type: object
    UpdateEntityRequest:
      type: object
      required:
      - entityVersion
      - events
      properties:
        entityVersion:
          type: string
        events:
          type: array
          items:
            $ref: '#/components/schemas/EventData'
    CreateEntityResponse:
      type: object
      properties:
        entityId:
          type: string
        entityVersion:
          type: string
        eventIds:
          type: array
          items:
            type: string