serverless.yml

service: aws-appsync-subscription
frameworkVersion: '3'

plugins:
  - serverless-appsync-plugin
  
provider:
  name: aws
  runtime: nodejs14.x
  region: ap-southeast-1

custom:
  tableName: chatRoom
  appSync:
    - name: 'appsyncChatApp'
      schema: schema.graphql
      authenticationType: AWS_LAMBDA
      lambdaAuthorizerConfig:
        functionName: lambdaAuthorizer
      # additionalAuthenticationProviders:
      #   - authenticationType: AWS_IAM
      #   - authenticationType: API_KEY
      mappingTemplatesLocation: mapping-templates
      mappingTemplates:
        - dataSource: sendChat
          type: Mutation
          field: sendChat
          request: "Mutation.sendChat.request.vtl"
          response: "Mutation.sendChat.response.vtl"
        - dataSource: ChatRoom
          type: Query
          field: getChatRoom
          request: "Query.getChatRoom.request.vtl"
          response: "Query.getChatRoom.response.vtl"
        - dataSource: ChatRoom
          type: Subscription
          field: incomingChat
          request: "Subscription.sendChat.request.vtl"
          response: "Subscription.sendChat.response.vtl"
      dataSources:
        - type: AMAZON_DYNAMODB
          name: ChatRoom
          config:
            tableName: ${self:custom.tableName}

resources:
  Resources:
    userTable:
      Type: AWS::DynamoDB::Table
      Properties:
        TableName: ${self:custom.tableName}
        AttributeDefinitions:
          - AttributeName: pk
            AttributeType: S
          - AttributeName: id
            AttributeType: S
        KeySchema:
          - AttributeName: pk
            KeyType: HASH
          - AttributeName: id
            KeyType: RANGE
        ProvisionedThroughput:
          ReadCapacityUnits: 1
          WriteCapacityUnits: 1
          
functions:
  lambdaAuthorizer:
    handler: lambdaAuthorizer.handler