• Step One: Basic lambdas and getting them deployed
• Step Two: Adding CodePipeline to remove manual deployments
• Step Three: Tips & Tricks

• infra - Deploys lambda with CDK
• lambdas - Contains Java lambda functions
• layer - Creates layer for use by the lambdas

1. create project structure
2. Create a simple java lambda - no input, string output
3. Unit test it - find lambda
4. deploy it via CDK
5. call it from commandline

aws lambda invoke --function-name CoreServicesDEVStack-developmentsimplehandlerD999D-ra3ExXakKWsH --payload '' response.txt

• view cdk.json and pom.xml to see how CDK finds the App to run for deployment

6. Introduce Message request class
7. Unittest and deploy
8. Test via commandline

aws lambda invoke --function-name CoreServicesDEVStack-developmentmessagehandler6D5F-a9zqbgSRXoiQ --cli-binary-format raw-in-base64-out --payload '{"message": "Hello"}' response.txt

9. util/domain classes in layer

10. Handler for API Gateway events
11. Unittest
12. Deploy endpoint via CDK
13. Call via curl

curl https://qaxjj2p7kc.execute-api.eu-west-1.amazonaws.com/development/mypath/myresource

• Check the CloudWatch logs
• Experiment with the event class
• Look at CORS configuration in API Gateway console

14. manuallly create api key
15. add it and userplan to apigw endpoint
16. deploy and test via x-api-key header

Note: AWS CDK CLI & Docker is required on your machine to deploy the solution

First time: run cdk bootstrap --profile <your profile>

• mvn clean package - build the solution
• cd infra
• cdk synth --profile <your profile> - synth the solution
• cdk deploy --profile <your profile> - deploy the solution

Resources: https://github.com/kolomied/awesome-cdk Intro: https://cdkworkshop.com/50-java/70-advanced-topics/100-pipelines/5000-test-actions.html

JavaCDK Stack example: https://github.com/xerris/poc-javacdk/blob/master/src/main/java/com/myorg/JavaCdkStack.java

JavaDocs for AWS CDK lib: https://docs.aws.amazon.com/cdk/api/v2/java/index.html?software/amazon/awscdk/services/codepipeline/actions/ManualApprovalAction.html ` AWS CDK Activate workshop: https://catalog.us-east-1.prod.workshops.aws/v2/workshops/13304db2-f715-48bf-ada0-92e5c4eea945/