serverless.yml

service: event-bridge-datasource

frameworkVersion: '3'

configValidationMode: error

plugins:
  - serverless-appsync-plugin

provider:
  name: aws
  region: us-east-1

functions:
  handleBlogEvent:
    handler: src/handleBlogEvent.handler
    events:
      - eventBridge:
          eventBus: !GetAtt EventBus.Name
          pattern:
            detail-type:
              - postCreated
              - postUpdated
              - postDeleted

appSync:
  name: event-bridge-datasource

  logging:
    level: ALL

  xrayEnabled: true

  authentication:
    type: API_KEY

  apiKeys:
    - name: Default

  dataSources:
    posts:
      type: AMAZON_DYNAMODB
      config:
        tableName: !Ref Posts

  resolvers:
    Mutation.createPost:
      functions:
        - dataSource: posts
          code: resolvers/createPost.js
        - putEvent

    Mutation.updatePost:
      functions:
        - dataSource: posts
          code: resolvers/updatePost.js
        - putEvent

    Mutation.deletePost:
      functions:
        - dataSource: posts
          code: resolvers/deletePost.js
        - putEvent

  pipelineFunctions:
    putEvent:
      code: resolvers/putEvent.js
      dataSource:
        type: AMAZON_EVENTBRIDGE
        config:
          eventBusArn: !GetAtt EventBus.Arn

resources:
  Resources:
    Posts:
      Type: AWS::DynamoDB::Table
      Properties:
        TableName: ${sls:stage}-${self:service}-posts
        BillingMode: PAY_PER_REQUEST
        AttributeDefinitions:
          - AttributeName: id
            AttributeType: S
          - AttributeName: authorName
            AttributeType: S
          - AttributeName: createdAt
            AttributeType: S
        KeySchema:
          - AttributeName: id
            KeyType: HASH
        GlobalSecondaryIndexes:
          - IndexName: author
            KeySchema:
              - AttributeName: authorName
                KeyType: HASH
              - AttributeName: createdAt
                KeyType: RANGE
            Projection:
              ProjectionType: ALL

    EventBus:
      Type: AWS::Events::EventBus
      Properties:
        Name: ${sls:stage}-${self:service}-blog