template.yaml

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: SAM Template for Layers-Demo Application
Globals:
  Function:
    Timeout: 30

Parameters:
  IAMRoleParameter:
    Description: The IAM Role to each Lambda Fuction
    Type: String
    Default: myLambdaRole
  AppEnvParameter:
    Type: String
    Description: Is it running locally within Docker or is it running remotely within AWS
    Default: docker
    AllowedValues:
      - aws
      - docker

Resources:
  ApiGatewayApi:
    Type: AWS::Serverless::Api
    Properties:
      StageName: Prod
      Cors:
        AllowMethods: "'*'"
        AllowHeaders: "'*'"
        AllowOrigin: "'*'"
      Auth:
        DefaultAuthorizer: LambdaTokenAuthorizer
        AddDefaultAuthorizerToCorsPreflight: False
        Authorizers:
          LambdaTokenAuthorizer:
            FunctionArn: !GetAtt TokenAuthFunction.Arn
  TokenAuthFunction:
    Type: AWS::Serverless::Function
    Properties:
      FunctionName: TokenAuthorizor
      CodeUri: ./authorizer
      Handler: handler.authorizer
      Runtime: nodejs10.x
  ListProductsFunction:
    Type: AWS::Serverless::Function # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
    Properties:
      FunctionName: ListProducts
      Description: APM List Products
      Role: !Sub 'arn:aws:iam::${AWS::AccountId}:role/${IAMRoleParameter}'
      CodeUri: list-products/
      Handler: main.lambda_handler
      Runtime: python3.8
      Layers:
        - !Ref DatabaseLayer
      Environment:
        Variables:
          APP_ENV: !Ref AppEnvParameter
      Events:
        ListAPMProductsAPI:
          Type: Api # More info about API Event Source: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#api
          Properties:
            RestApiId: !Ref ApiGatewayApi
            Path: /products
            Method: get
  GetProductFunction:
    Type: AWS::Serverless::Function # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
    Properties:
      FunctionName: GetProduct
      Description: APM Get Product
      Role: !Sub 'arn:aws:iam::${AWS::AccountId}:role/${IAMRoleParameter}'
      CodeUri: get-product/
      Handler: main.lambda_handler
      Runtime: python3.8
      Layers:
        - !Ref DatabaseLayer
      Environment:
        Variables:
          APP_ENV: !Ref AppEnvParameter
      Events:
        GetAPMProductsAPI:
          Type: Api # More info about API Event Source: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#api
          Properties:
            RestApiId: !Ref ApiGatewayApi
            Path: /products/{id}
            Method: get
  CreateProductFunction:
    Type: AWS::Serverless::Function # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
    Properties:
      FunctionName: CreateProduct
      Description: APM Create Product
      Role: !Sub 'arn:aws:iam::${AWS::AccountId}:role/${IAMRoleParameter}'
      CodeUri: create-product/
      Handler: main.lambda_handler
      Runtime: python3.8
      Layers:
        - !Ref DatabaseLayer
      Environment:
        Variables:
          APP_ENV: !Ref AppEnvParameter
      Events:
        CreateAPMProductsAPI:
          Type: Api # More info about API Event Source: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#api
          Properties:
            RestApiId: !Ref ApiGatewayApi
            Path: /products
            Method: post
  UpdateProductFunction:
    Type: AWS::Serverless::Function # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
    Properties:
      FunctionName: UpdateProduct
      Description: APM Update Product
      Role: !Sub 'arn:aws:iam::${AWS::AccountId}:role/${IAMRoleParameter}'
      CodeUri: update-product/
      Handler: main.lambda_handler
      Runtime: python3.8
      Layers:
        - !Ref DatabaseLayer
      Environment:
        Variables:
          APP_ENV: !Ref AppEnvParameter
      Events:
        UpdateAPMProductsAPI:
          Type: Api # More info about API Event Source: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#api
          Properties:
            RestApiId: !Ref ApiGatewayApi
            Path: /products/{id}
            Method: put
  DeleteProductFunction:
    Type: AWS::Serverless::Function # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
    Properties:
      FunctionName: DeleteProduct
      Description: APM Delete Product
      Role: !Sub 'arn:aws:iam::${AWS::AccountId}:role/${IAMRoleParameter}'
      CodeUri: delete-product/
      Handler: main.lambda_handler
      Runtime: python3.8
      Layers:
        - !Ref DatabaseLayer
      Environment:
        Variables:
          APP_ENV: !Ref AppEnvParameter
      Events:
        DeleteAPMProductsAPI:
          Type: Api # More info about API Event Source: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#api
          Properties:
            RestApiId: !Ref ApiGatewayApi
            Path: /products/{id}
            Method: delete
  DatabaseLayer:
    Type: AWS::Serverless::LayerVersion
    Properties:
      LayerName: DatabaseLayer
      Description: Database Layer
      # ContentUri: database_layer/database-layer.zip
      ContentUri: database_layer/
      CompatibleRuntimes:
        - python3.8
      RetentionPolicy: Delete

Outputs:
  # ServerlessRestApi is an implicit API created out of Events key under Serverless::Function
  # Find out more about other implicit resources you can reference within SAM
  # https://github.com/awslabs/serverless-application-model/blob/master/docs/internals/generated_resources.rst#api
  ListProductsApi:
    Description: "API Gateway endpoint URL for Prod stage for List Products function"
    Value: !Sub "https://${ApiGatewayApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/listproducts/"
  ListProductsFunction:
    Description: "ListProducts Lambda Function ARN"
    Value: !GetAtt ListProductsFunction.Arn
  GetProductApi:
    Description: "API Gateway endpoint URL for Prod stage for Get Product function"
    Value: !Sub "https://${ApiGatewayApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/getproduct/"
  GetProductFunction:
    Description: "GetProduct Lambda Function ARN"
    Value: !GetAtt GetProductFunction.Arn
  CreateProductApi:
    Description: "API Gateway endpoint URL for Prod stage for Create Product function"
    Value: !Sub "https://${ApiGatewayApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/createproduct/"
  CreateProductFunction:
    Description: "CreateProduct Lambda Function ARN"
    Value: !GetAtt CreateProductFunction.Arn
  UpdateProductApi:
    Description: "API Gateway endpoint URL for Prod stage for Update Product function"
    Value: !Sub "https://${ApiGatewayApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/updateproduct/"
  UpdateProductFunction:
    Description: "UpdateProduct Lambda Function ARN"
    Value: !GetAtt UpdateProductFunction.Arn
  DeleteProductApi:
    Description: "API Gateway endpoint URL for Prod stage for Delete Product function"
    Value: !Sub "https://${ApiGatewayApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/deleteproduct/"
  DeleteProductFunction:
    Description: "DeleteProduct Lambda Function ARN"
    Value: !GetAtt DeleteProductFunction.Arn
  DatabaseLayerARN:
    Value: !Ref DatabaseLayer
    Description: DatabaseLayer layer ARN
    Export:
      Name: database-layer-arn