template.yaml

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31

Resources:

  GradualDeploymentTable:
    Type: AWS::Serverless::SimpleTable
    Properties:
      PrimaryKey:
        Name: id
        Type: String
      Tags:
        project: aws-sam-dradual-deployment
      SSESpecification:
        SSEEnabled: true

  GradualDeploymentApi:
    Type: AWS::Serverless::Api
    Properties:
      StageName: dev

  PreTrafficHookHandler:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: .
      Handler: com.home.amazon.serverless.PreTrafficHookHandler::handleRequest
      Policies:
        - Version: "2012-10-17"
          Statement:
            - Effect: "Allow"
              Action:
                - "codedeploy:PutLifecycleEventHookExecutionStatus"
              Resource:
                !Sub 'arn:aws:codedeploy:${AWS::Region}:${AWS::AccountId}:deploymentgroup:${ServerlessDeploymentApplication}/*'
        - Version: "2012-10-17"
          Statement:
            - Effect: "Allow"
              Action:
                - "lambda:InvokeFunction"
              Resource: !Ref RequestHandlerFunction.Version
      Runtime: java8.al2
      DeploymentPreference:
        Enabled: false
      Timeout: 60
      MemorySize: 512
      Environment:
        Variables:
          NewVersion: !Ref RequestHandlerFunction.Version
          LifecycleStatus: Succeeded

  # See https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-resource-function.html
  # for more info to see how to tune the lambda function configs based on your use case.
  RequestHandlerFunction:
    Type: AWS::Serverless::Function
    Properties:
      Runtime: java8.al2
      Handler: com.home.amazon.serverless.ApiGatewayRequestHandler::handleRequest
      Timeout: 60
      MemorySize: 512
      CodeUri: .
      # Attach policies here to give the function permission to access other AWS resources if needed
      # See: https://github.com/awslabs/serverless-application-model/blob/master/docs/policy_templates.rst
      # eg:
      #Policies:
      # - S3ReadPolicy:
      #     BucketName: test-bucket
      Environment:
        Variables:
          TABLE: !Ref GradualDeploymentTable
      Policies:
        - DynamoDBReadPolicy:
            TableName: !Ref GradualDeploymentTable
      Events:
        ApiEvent:
          Type: Api
          Properties:
            Path: /items/{id}
            Method: get
            RestApiId:
              Ref: GradualDeploymentApi
      DeploymentPreference:
        Type: Linear10PercentEvery1Minute
        Hooks:
          PreTraffic: !Ref PreTrafficHookHandler
      AutoPublishAlias: dev