serverless.yml

service: graphql-server-demo # NOTE: update this with your service name

provider:
  name: aws
  runtime: nodejs10.x
  region: eu-central-1 # NOTE: change with your preferred region

  iamRoleStatements:
    - Effect: Allow
      Action:
        - execute-api:ManageConnections
      Resource: 'arn:aws:execute-api:*:*:*/development/POST/@connections/*'
    - Effect: Allow
      Action:
        - dynamodb:DeleteItem
        - dynamodb:GetItem
        - dynamodb:PutItem
        - dynamodb:UpdateItem
      Resource: !GetAtt ConnectionsDynamoDBTable.Arn
    - Effect: Allow
      Action:
        - dynamodb:DescribeStream
        - dynamodb:GetRecords
        - dynamodb:GetShardIterator
        - dynamodb:ListStreams
      Resource: !GetAtt EventsDynamoDBTable.StreamArn
    - Effect: Allow
      Action:
        - dynamodb:PutItem
      Resource: !GetAtt EventsDynamoDBTable.Arn
    - Effect: Allow
      Action:
        - dynamodb:BatchWriteItem
        - dynamodb:DeleteItem
        - dynamodb:GetItem
        - dynamodb:PutItem
        - dynamodb:Query
        - dynamodb:Scan
      Resource: !GetAtt SubscriptionsDynamoDBTable.Arn
    - Effect: Allow
      Action:
        - dynamodb:BatchWriteItem
        - dynamodb:DeleteItem
        - dynamodb:GetItem
        - dynamodb:PutItem
      Resource: !GetAtt SubscriptionOperationsDynamoDBTable.Arn

functions:
  wsHandler:
    handler: index.handleWebSocket
    events:
      - websocket:
          route: $connect
      - websocket:
          route: $disconnect
      - websocket:
          route: $default
  eventProcessorHandler:
    handler: index.handleEvents
    events:
      - stream:
          enabled: true
          type: dynamodb
          arn:
            Fn::GetAtt: [EventsDynamoDBTable, StreamArn]
  # this one is optional (if you want to support HTTP)
  httpHandler:
    handler: index.handleHTTP
    events:
      - http:
          path: /
          method: any
          cors: true

resources:
  Resources:
    ConnectionsDynamoDBTable:
      Type: AWS::DynamoDB::Table
      Properties:
        # see DynamoDBConnectionManager
        TableName: Connections
        AttributeDefinitions:
          - AttributeName: id
            AttributeType: S
        BillingMode: PAY_PER_REQUEST
        KeySchema:
          # connection id
          - AttributeName: id
            KeyType: HASH

    SubscriptionsDynamoDBTable:
      Type: AWS::DynamoDB::Table
      Properties:
        # see DynamoDBSubscriptionManager
        TableName: Subscriptions
        AttributeDefinitions:
          - AttributeName: event
            AttributeType: S
          - AttributeName: subscriptionId
            AttributeType: S
        BillingMode: PAY_PER_REQUEST
        KeySchema:
          - AttributeName: event
            KeyType: HASH
          - AttributeName: subscriptionId
            KeyType: RANGE

    SubscriptionOperationsDynamoDBTable:
      Type: AWS::DynamoDB::Table
      Properties:
        # see DynamoDBSubscriptionManager
        TableName: SubscriptionOperations
        AttributeDefinitions:
          - AttributeName: subscriptionId
            AttributeType: S
        BillingMode: PAY_PER_REQUEST
        KeySchema:
          - AttributeName: subscriptionId
            KeyType: HASH

    EventsDynamoDBTable:
      Type: AWS::DynamoDB::Table
      Properties:
        # see DynamoDBEventStore
        TableName: Events
        KeySchema:
          - AttributeName: id
            KeyType: HASH
        BillingMode: PAY_PER_REQUEST
        # see ISubscriptionEvent
        AttributeDefinitions:
          - AttributeName: id
            AttributeType: S
        StreamSpecification:
          StreamViewType: NEW_IMAGE
        # This one is optional (all events have 2 hours of lifetime in ttl field but enabling TTL is up to you)
        TimeToLiveSpecification:
          AttributeName: ttl
          Enabled: true