Disconnect cards in Application Composer

In Application Composer, you connect and disconnect AWS resources using enhanced component cards and standard component cards. This section describes how to disconnect both types of cards.

Enhanced component cards

To disconnect enhanced component cards, select the line and choose Disconnect.

Application Composer will automatically modify your template to remove the event-driven relationship from your application.

Standard component cards

Standard component cards do not include ports to create connections with other resources. During card configuration, you specify event-driven relationships in the template of your application, Application Composer will automatically detect these connections and visualize them with a dotted line between your cards. To disconnect a standard component card, remove the event-driven relationship in the template of your application.

The following example shows a Lambda function that is connected with an Amazon API Gateway rest API:

AWSTemplateFormatVersion: '2010-09-09'
Resources:
  MyApi:
    Type: 'AWS::ApiGateway::RestApi'
    Properties:
      Name: MyApi

  ApiGatewayMethod:
    Type: 'AWS::ApiGateway::Method'
    Properties:
      HttpMethod: POST  # Specify the HTTP method you want to use (e.g., GET, POST, PUT, DELETE)
      ResourceId: !GetAtt MyApi.RootResourceId
      RestApiId: !Ref MyApi
      AuthorizationType: NONE
      Integration:
        Type: AWS_PROXY
        IntegrationHttpMethod: POST
        Uri: !Sub
          - arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${LambdaFunctionArn}/invocations
          - { LambdaFunctionArn: !GetAtt MyLambdaFunction.Arn }
      MethodResponses:
        - StatusCode: 200

  MyLambdaFunction:
    Type: 'AWS::Lambda::Function'
    Properties:
      Handler: index.handler
      Role: !GetAtt LambdaExecutionRole.Arn
      Runtime: nodejs14.x
      Code:
        S3Bucket: your-bucket-name
        S3Key: your-lambda-zip-file.zip

  LambdaExecutionRole:
    Type: 'AWS::IAM::Role'
    Properties:
      AssumeRolePolicyDocument:
        Version: '2012-10-17'
        Statement:
          - Effect: Allow
            Principal:
              Service: lambda.amazonaws.com
            Action: 'sts:AssumeRole'
      Policies:
        - PolicyName: LambdaExecutionPolicy
          PolicyDocument:
            Version: '2012-10-17'
            Statement:
              - Effect: Allow
                Action:
                  - 'logs:CreateLogGroup'
                  - 'logs:CreateLogStream'
                  - 'logs:PutLogEvents'
                Resource: 'arn:aws:logs:*:*:*'
              - Effect: Allow
                Action:
                  - 'lambda:InvokeFunction'
                Resource: !GetAtt MyLambdaFunction.Arn

To remove the connection betweent the two cards, remove references to MyLambdaFunction listed in ApiGatewayMethod: under Integration.