Acronis Topics API

openapi: 3.2.0
info:
  title: Event Manager Topics API
  description: Event Manager API describes the interface for event publishing and subscription management.
  version: v1
servers:
- url: https://dev-cloud.acronis.com/api/event_manager/v1
  variables: {}
tags:
- name: Topics
paths:
  /topics:
    get:
      operationId: Fetch topics
      description: Fetch a list of all available topics that client is allowed to publish or subscribe to.
      parameters:
      - name: topic_id
        description: Optional. Specific topic ID to fetch. Wildcard is not supported.
        in: query
        schema:
          description: Optional. Specific topic ID to fetch. Wildcard is not supported.
          x-cti.reference: cti.a.p.em.topic.v1.0
          type: string
          pattern: ^cti\.([a-z][a-z0-9_]*\.[a-z][a-z0-9_]*\.[a-z_][a-z0-9_.]*\.v[\d]+\.[\d]+)(~([a-z][a-z0-9_]*\.[a-z][a-z0-9_]*\.[a-z_][a-z0-9_.]*\.v[\d]+\.[\d]+))*(~[0-9a-f]{8}\b-[0-9a-f]{4}\b-[0-9a-f]{4}\b-[0-9a-f]{4}\b-[0-9a-f]{12})?$
          maxLength: 1024
        x-cti.reference: cti.a.p.em.topic.v1.0
      responses:
        '200':
          description: List of topics
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Topic'
        '401':
          description: Method required an authenticated user
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorMessage'
        '403':
          description: Current user has no permissions for this URL/method
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorMessage'
        '500':
          description: Internal service error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorMessage'
      security:
      - oauth2:
        - urn:acronis.com:event_manager:{cti_query}:publisher
        - urn:acronis.com:event_manager:{cti_query}:subscriber
      tags:
      - Topics
      summary: Fetch topics
      x-summary-source: derived
  /topics/offsets:
    get:
      operationId: Fetch topic offsets
      description: Fetch the latest offset for a specific topic, providing a global view of the current stream state.
      parameters:
      - name: topic_id
        description: Required, Topic ID to fetch the offset for.
        required: true
        in: query
        schema:
          description: Required, Topic ID to fetch the offset for.
          x-cti.reference: cti.a.p.em.topic.v1.0
          type: string
          pattern: ^cti\.([a-z][a-z0-9_]*\.[a-z][a-z0-9_]*\.[a-z_][a-z0-9_.]*\.v[\d]+\.[\d]+)(~([a-z][a-z0-9_]*\.[a-z][a-z0-9_]*\.[a-z_][a-z0-9_.]*\.v[\d]+\.[\d]+))*(~[0-9a-f]{8}\b-[0-9a-f]{4}\b-[0-9a-f]{4}\b-[0-9a-f]{4}\b-[0-9a-f]{12})?$
          maxLength: 1024
        x-cti.reference: cti.a.p.em.topic.v1.0
      - name: position
        description: 'Required, the position to fetch the offset for.

          '
        required: true
        in: query
        schema:
          description: 'Required, the position to fetch the offset for.

            '
          enum:
          - EARLIEST
          - TIMESTAMP
          - CURRENT
          type: string
      - name: timestamp
        description: 'Required for timestamp positions. Fetch the offset position to the neares future from a specific time. The timestamp is specified in ISO 8601 format using the RFC 3339 profile.

          '
        in: query
        schema:
          description: 'Required for timestamp positions. Fetch the offset position to the neares future from a specific time. The timestamp is specified in ISO 8601 format using the RFC 3339 profile.

            '
          type: string
          format: date-time
      responses:
        '200':
          description: ''
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/GetTopicsOffsetResponse'
        '401':
          description: Method required an authenticated user
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorMessage'
        '403':
          description: Current user has no permissions for this URL/method
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorMessage'
        '500':
          description: Internal service error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorMessage'
      security:
      - oauth2:
        - urn:acronis.com:event_manager:{cti_query}:publisher
        - urn:acronis.com:event_manager:{cti_query}:subscriber
      tags:
      - Topics
      summary: Fetch topic offsets
      x-summary-source: derived
components:
  schemas:
    duration_iso:
      description: 'Duration format compliant to [ISO 8601](https://en.wikipedia.org/wiki/ISO_8601#Durations). See regex with unit tests [here](https://regex101.com/r/A2fis4).

        '
      type: string
      pattern: ^P(?:(\d+)Y)?(?:(\d+)M)?(?:(\d+)W)?(?:(\d+)D)?(?:T(?:(\d+)H)?(?:(\d+)M)?(?:(\d+)S)?)?$
    error:
      description: Base error object
      example:
        domain: EventManager
        code: invalidEvent
        error: Bad Request
        context:
          errors:
          - event_id: 62d2afda-685e-457f-8624-92132d97a7ed
            message: 'Invalid payload: tenant_id is required'
      type: object
      required:
      - domain
      - code
      properties:
        domain:
          description: Error type or category. Can be ['Licensing','Access'] or name of service (for example 'PolicyManager' or 'VaultManager')
          type: string
        code:
          description: Error id or code, unique in the domain. Same as in 'reason' field
          type: string
        message:
          description: human-readable message, describing the error.
          type: string
        reason:
          description: Obsolete. Error id or code, unique in the domain. Same as in 'code' field
          type: string
        context:
          description: Error context dictionary
          type: object
        kb_link:
          $ref: '#/components/schemas/kbLinkInfo'
        debug:
          $ref: '#/components/schemas/debugInfo'
    GetTopicsOffsetResponse:
      type: object
      required:
      - topic_id
      - offset
      properties:
        topic_id:
          description: Identifier of the topic.
          x-cti.reference: cti.a.p.em.topic.v1.0
          example: cti.a.p.em.topic.v1.0~a.p.tenant.v1.0
          type: string
          pattern: ^cti\.([a-z][a-z0-9_]*\.[a-z][a-z0-9_]*\.[a-z_][a-z0-9_.]*\.v[\d]+\.[\d]+)(~([a-z][a-z0-9_]*\.[a-z][a-z0-9_]*\.[a-z_][a-z0-9_.]*\.v[\d]+\.[\d]+))*(~[0-9a-f]{8}\b-[0-9a-f]{4}\b-[0-9a-f]{4}\b-[0-9a-f]{4}\b-[0-9a-f]{12})?$
          maxLength: 1024
        offset:
          description: Requested offset sequence number.
          type: integer
          format: int64
    ErrorMessage:
      type: object
      additionalProperties: false
      required:
      - error
      properties:
        error:
          $ref: '#/components/schemas/error'
    INFINITE:
      description: 'The retention period for events within this topic on event archive side is infinite.

        '
      enum:
      - INFINITE
      type: string
    kbLinkInfo:
      description: Components for kblink
      type: object
      required:
      - line_tag
      - ser_code
      - version
      - build
      - product
      - os
      properties:
        line_tag:
          type: string
        ser_code:
          type: string
        version:
          type: string
        build:
          type: string
        product:
          type: string
        os:
          type: string
    Topic:
      description: 'Event topic is a stream of events of the same or different types sharing the same delivery, ordering, consolidation & retention rules.

        '
      x-cti.cti: cti.a.p.em.topic.v1.0
      x-cti.final: false
      type: object
      additionalProperties: false
      required:
      - id
      - description
      - persistency
      - ordering
      - producer_consolidation
      - archive_consolidation
      - retention
      properties:
        id:
          description: The topic id is an identifier of a stream of events in publishing and subscribe semantics
          x-cti.id: true
          type: string
          pattern: ^cti\.([a-z][a-z0-9_]*\.[a-z][a-z0-9_]*\.[a-z_][a-z0-9_.]*\.v[\d]+\.[\d]+)(~([a-z][a-z0-9_]*\.[a-z][a-z0-9_]*\.[a-z_][a-z0-9_.]*\.v[\d]+\.[\d]+))*(~[0-9a-f]{8}\b-[0-9a-f]{4}\b-[0-9a-f]{4}\b-[0-9a-f]{4}\b-[0-9a-f]{12})?$
          maxLength: 1024
        description:
          description: description of topic purpose and usage
          x-cti.description: true
          type: string
        persistency:
          description: "true - events are persisted by Event Manager, Consumers will be able to fetch events that happened before the subscription\n       (see the `archive_consolidation` and retention parameters)\nfalse - events are not persisted and ordering is not strict. Consumers will see only events that happened\n        after consumer created subscription in the Event Manager (Delivery Manager service).\n        Events can be lost in Event Manager in case of restarts or if consumer was not able to receive events within\n        some reasonable time interval and events retention happened in the Event Delivery manager\n"
          type: boolean
        ordering:
          description: "PRODUCER     - Events must be ordered by Producer, Ingest Manager only validates event sequence id and ensures there are no lost events in the stream.\n               The 'producer' mode is supposed to be used if producer can fully control events sequence, typically it means all the 'producer'\n               instances are sharing the same database.\n\nEVENTMANAGER - events are ordered by Event Manager (Ingest Manager). This mode is useful for multi-Producer case\n               when there is no single Producer' database and so there is no way to guarantee events ordering across multiple Producers\n\nNONE         - No events ordering. Suitable for audit-kind events from different sources\n"
          enum:
          - NONE
          - PRODUCER
          - EVENTMANAGER
          type: string
        producer_consolidation:
          description: "The `producer_consolidation` attribute reflects events consolidation mode on the Producer side, i.e. actual behavior\nof the service rather than configurable parameter:\n\nNONE - no consolidation happens and events are stored independently only\n\nTTS - in addition to raw independent events there will be one more stream of events consolidated by type, tenantid\n      and subject so the latest event with the same type, tenantid and subject will be stored without any retention\n\nFor topics that contain notification events reflecting state changes of long-lived objects (such as tenants, users,\nsettings, workloads, policies, etc.), it is typical ho have `producer_consolidation` set to `TTS`. Such configuration\nallows the event stream to serve dual purposes: notifying state changes and enabling full event stream replay\n(reconciliation) by clients.\n\nFor short-lived objects that have their own retention policies, such as tasks, activities, alerts and such,\nit is typical to have `producer_consolidation` set to `NONE` and `retention` similar to the retention time\nof the event origin object.\n"
          default: NONE
          enum:
          - NONE
          - TTS
          type: string
        archive_consolidation:
          description: "The `archive_consolidation` attribute defines events consolidation mode on the Event Archive side:\n\nNONE - no consolidation happens and events are stored independently only with appropriate retention\n\nTTS  - event with the same type (T), tenantid (T) and subject (S) will be stored without any retention\n       (i.e. will overwrite prev event with the same type, tenantid and subject eventually)\n\nThe `TTS` `archive_consolidation` can be typically used for topics that contain notification events reflecting\nstate changes of long-lived objects (such as tenants, users, settings, workloads, policies, etc.). It would\nallow the event stream to serve dual purposes: notifying state changes and enabling full event stream replay\n(reconciliation) by clients.\n\nFor short-lived objects that have their own retention policies, such as tasks, activities, alerts and such,\nit is advisable to set `archive_consolidation` to `NONE` and `retention` similar to the retention time\nof the event origin object.\n"
          default: NONE
          enum:
          - NONE
          - TTS
          type: string
        retention:
          description: 'Specifies the retention period for events within this topic on event archive side.


            The retention duration begins from the moment an event is received by the Event Manager. Events older than the

            specified duration are eligible for deletion by the retention job. Must be a valid ISO 8601 duration or

            ''INFINITE''.


            This property is ignored if `archive_consolidation` is set to `TTS`, in this case retention effectively is

            equal to ''INFINITE''


            It''s recommended to have retention period comparable to the object''s lifetime to enable clients to use a single

            mechanism for both change state notifications and full event stream replay (reconciliation).

            '
          anyOf:
          - $ref: '#/components/schemas/duration_iso'
          - $ref: '#/components/schemas/INFINITE'
    debugInfo:
      description: Error debug information (map type)
      type: object
  securitySchemes:
    oauth2:
      type: oauth2
      description: OAuth 2.0 security scheme definition for a service authorization.
      flows:
        password:
          scopes:
            urn:acronis.com:event_manager:{cti_query}:publisher: ''
            urn:acronis.com:event_manager:{cti_query}:subscriber: ''
            urn:acronis.com:audit:{role|permissions}: ''
          tokenUrl: /bc/ipd/token
        clientCredentials:
          scopes:
            urn:acronis.com:event_manager:{cti_query}:publisher: ''
            urn:acronis.com:event_manager:{cti_query}:subscriber: ''
            urn:acronis.com:audit:{role|permissions}: ''
          tokenUrl: /bc/ipd/token
        authorizationCode:
          scopes:
            urn:acronis.com:event_manager:{cti_query}:publisher: ''
            urn:acronis.com:event_manager:{cti_query}:subscriber: ''
            urn:acronis.com:audit:{role|permissions}: ''
          authorizationUrl: /bc/ipd/authorize
          tokenUrl: /bc/ipd/token