Amazon Neptune Streams API

openapi: 3.1.0
info:
  title: Amazon Neptune Neptune Streams API
  description: >-
    Neptune Streams generates a complete sequence of change-log entries that
    record every change made to graph data as it happens, enabling real-time
    capture of graph mutations via a REST API. Streams must be enabled by
    setting the neptune_streams DB cluster parameter to 1. The API supports
    both property graph (Gremlin/openCypher) and RDF (SPARQL) stream
    endpoints. Only HTTP GET operations are allowed. Maximum response size
    is 10 MB. Supports gzip compression via Accept-Encoding header.
  version: '2024-01-01'
  contact:
    name: Amazon Web Services
    url: https://docs.aws.amazon.com/neptune/latest/userguide/streams.html
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
servers:
- url: https://{cluster-endpoint}:8182
  description: Neptune Streams REST endpoint
  variables:
    cluster-endpoint:
      default: your-cluster-endpoint.region.neptune.amazonaws.com
      description: The cluster endpoint DNS name for your Neptune DB cluster
security:
- aws_sigv4: []
tags:
- name: Property Graph Stream
  description: Change data capture for property graph (Gremlin/openCypher) data
- name: SPARQL Stream
  description: Change data capture for RDF (SPARQL) data
paths:
  /propertygraph/stream:
    get:
      operationId: getPropertyGraphStream
      summary: Amazon Neptune Get Property Graph Change Stream Records
      description: >-
        Gets a stream of change-log entries for property graph
        (Gremlin/openCypher) data. Each entry records a mutation (ADD or
        REMOVE) made to vertices, edges, or their properties. The response
        format is PG_JSON. This is the recommended endpoint for property
        graph streams, replacing the deprecated /gremlin/stream endpoint.
      tags:
      - Property Graph Stream
      parameters:
      - name: limit
        in: query
        description: >-
          Maximum number of records to return (1-100,000). Default is 10.
          The 10 MB response size limit takes precedence over this value.
        schema:
          type: integer
          minimum: 1
          maximum: 100000
          default: 10
      - name: iteratorType
        in: query
        description: >-
          Determines the starting point for reading the stream.
        schema:
          type: string
          enum:
          - AT_SEQUENCE_NUMBER
          - AFTER_SEQUENCE_NUMBER
          - TRIM_HORIZON
          - LATEST
          default: AT_SEQUENCE_NUMBER
      - name: commitNum
        in: query
        description: >-
          The commit number to start reading from. Required when
          iteratorType is AT_SEQUENCE_NUMBER or AFTER_SEQUENCE_NUMBER.
        schema:
          type: integer
      - name: opNum
        in: query
        description: >-
          The operation sequence number within the specified commit.
          Default is 1.
        schema:
          type: integer
          default: 1
      - name: Accept-Encoding
        in: header
        description: Set to 'gzip' to receive compressed responses.
        schema:
          type: string
          enum:
          - gzip
      responses:
        '200':
          description: Stream records retrieved successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PropertyGraphStreamResponse'
              examples:
                getPropertyGraphStream200Example:
                  summary: Default getPropertyGraphStream 200 response
                  x-microcks-default: true
                  value:
                    lastEventId: {}
                    lastTrxTimestamp: 1
                    format: PG_JSON
                    records:
                    - {}
                    totalRecords: 1
        '400':
          description: Bad request - invalid parameters.
        '500':
          description: Internal server error.
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /pg/stream:
    get:
      operationId: getPropertyGraphStreamAlias
      summary: Amazon Neptune Get Property Graph Change Stream Records (alias)
      description: >-
        Alias for /propertygraph/stream. Gets a stream of change-log entries
        for property graph data. Supports the same parameters and returns
        the same response format.
      tags:
      - Property Graph Stream
      parameters:
      - name: limit
        in: query
        schema:
          type: integer
          minimum: 1
          maximum: 100000
          default: 10
      - name: iteratorType
        in: query
        schema:
          type: string
          enum:
          - AT_SEQUENCE_NUMBER
          - AFTER_SEQUENCE_NUMBER
          - TRIM_HORIZON
          - LATEST
      - name: commitNum
        in: query
        schema:
          type: integer
      - name: opNum
        in: query
        schema:
          type: integer
          default: 1
      responses:
        '200':
          description: Stream records retrieved successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PropertyGraphStreamResponse'
              examples:
                getPropertyGraphStreamAlias200Example:
                  summary: Default getPropertyGraphStreamAlias 200 response
                  x-microcks-default: true
                  value:
                    lastEventId: {}
                    lastTrxTimestamp: 1
                    format: PG_JSON
                    records:
                    - {}
                    totalRecords: 1
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /sparql/stream:
    get:
      operationId: getSparqlStream
      summary: Amazon Neptune Get SPARQL RDF Change Stream Records
      description: >-
        Gets a stream of change-log entries for RDF (SPARQL) data. Each
        entry records a mutation (ADD or REMOVE) of an RDF triple or quad.
        The response format is NQUADS, with each change represented as an
        N-Quads statement string.
      tags:
      - SPARQL Stream
      parameters:
      - name: limit
        in: query
        description: >-
          Maximum number of records to return (1-100,000). Default is 10.
        schema:
          type: integer
          minimum: 1
          maximum: 100000
          default: 10
      - name: iteratorType
        in: query
        description: >-
          Determines the starting point for reading the stream.
        schema:
          type: string
          enum:
          - AT_SEQUENCE_NUMBER
          - AFTER_SEQUENCE_NUMBER
          - TRIM_HORIZON
          - LATEST
          default: AT_SEQUENCE_NUMBER
      - name: commitNum
        in: query
        description: >-
          The commit number to start reading from. Required when
          iteratorType is AT_SEQUENCE_NUMBER or AFTER_SEQUENCE_NUMBER.
        schema:
          type: integer
      - name: opNum
        in: query
        description: >-
          The operation sequence number within the specified commit.
        schema:
          type: integer
          default: 1
      - name: Accept-Encoding
        in: header
        description: Set to 'gzip' to receive compressed responses.
        schema:
          type: string
          enum:
          - gzip
      responses:
        '200':
          description: Stream records retrieved successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SparqlStreamResponse'
              examples:
                getSparqlStream200Example:
                  summary: Default getSparqlStream 200 response
                  x-microcks-default: true
                  value:
                    lastEventId: {}
                    lastTrxTimestamp: 1
                    format: NQUADS
                    records:
                    - {}
                    totalRecords: 1
        '400':
          description: Bad request - invalid parameters.
        '500':
          description: Internal server error.
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
components:
  securitySchemes:
    aws_sigv4:
      type: apiKey
      name: Authorization
      in: header
      description: AWS Signature Version 4 authentication via IAM
  schemas:
    PropertyGraphStreamResponse:
      type: object
      properties:
        lastEventId:
          $ref: '#/components/schemas/StreamEventId'
        lastTrxTimestamp:
          type: integer
          description: Unix epoch timestamp in milliseconds of the last commit.
        format:
          type: string
          enum:
          - PG_JSON
          description: The serialization format (always PG_JSON for property graph).
        records:
          type: array
          description: The array of change-log stream records.
          items:
            $ref: '#/components/schemas/PropertyGraphStreamRecord'
        totalRecords:
          type: integer
          description: Total number of records in the response.
    PropertyGraphStreamRecord:
      type: object
      properties:
        commitTimestamp:
          type: integer
          description: Unix epoch timestamp in milliseconds of the transaction commit.
        eventId:
          $ref: '#/components/schemas/StreamEventId'
        data:
          $ref: '#/components/schemas/PropertyGraphData'
        op:
          type: string
          enum:
          - ADD
          - REMOVE
          description: The operation type (ADD or REMOVE).
        isLastOp:
          type: boolean
          description: >-
            True only if this is the last operation in the transaction.
    PropertyGraphData:
      type: object
      description: >-
        The serialized property graph change data. The type field indicates
        the element kind.
      properties:
        id:
          type: string
          description: The unique identifier of the element.
        type:
          type: string
          description: >-
            The element type: v (vertex), vl (vertex label), vp (vertex
            property), e (edge), ep (edge property).
          enum:
          - v
          - vl
          - vp
          - e
          - ep
        key:
          type: string
          description: The property key name.
        value:
          type: object
          description: The property value with its data type.
          properties:
            value:
              description: The actual property value.
            dataType:
              type: string
              description: The data type (String, Integer, Double, etc.).
        from:
          type: string
          description: Source vertex ID (for edges only).
        to:
          type: string
          description: Target vertex ID (for edges only).
    SparqlStreamResponse:
      type: object
      properties:
        lastEventId:
          $ref: '#/components/schemas/StreamEventId'
        lastTrxTimestamp:
          type: integer
          description: Unix epoch timestamp in milliseconds of the last commit.
        format:
          type: string
          enum:
          - NQUADS
          description: The serialization format (always NQUADS for RDF).
        records:
          type: array
          description: The array of change-log stream records.
          items:
            $ref: '#/components/schemas/SparqlStreamRecord'
        totalRecords:
          type: integer
          description: Total number of records in the response.
    SparqlStreamRecord:
      type: object
      properties:
        commitTimestamp:
          type: integer
          description: Unix epoch timestamp in milliseconds of the transaction commit.
        eventId:
          $ref: '#/components/schemas/StreamEventId'
        data:
          type: object
          properties:
            stmt:
              type: string
              description: >-
                The N-Quads statement representing the RDF triple or quad change.
        op:
          type: string
          enum:
          - ADD
          - REMOVE
          description: The operation type (ADD or REMOVE).
        isLastOp:
          type: boolean
          description: True only if this is the last operation in the transaction.
    StreamEventId:
      type: object
      description: A sequence identifier for a stream event.
      properties:
        commitNum:
          type: integer
          description: The commit (transaction) number.
        opNum:
          type: integer
          description: The operation number within the commit.