Download as PDF, PPTX
Uploaded byTroy Miles
AWS Lambda Function with Kotlin
The document presents a talk by Troy Miles on integrating AWS Lambda with Kotlin at Silicon Valley Code Camp 2017, discussing the features and benefits of using Kotlin for microservices on AWS. It covers topics such as AWS Lambda's pricing, API Gateway functionalities, and the advantages of RESTful APIs over SOAP. The document also highlights debugging strategies and future steps for improving application performance in AWS environments.
More Related Content
Similar to AWS Lambda Function with Kotlin
AWS Lambda Function with Kotlin
- 1. Silicon Valley Code Camp 8October 2017 AWS Lambda Function with Kotlin
- 2. Troy Miles • TroyMiles aka the RocknCoder • Over 38 years of programming experience • Speaker and author • bit.ly/rc-jquerybook • rockncoder@gmail.com • @therockncoder • lynda.com Author!
- 3. Kotlin for JavaDevelopers Join me at KotlinConf 2+3 Nov 2017 in San Francisco
- 4. Agenda • Kotlin • Microservice •RESTful API • HTTP Methods • Amazon Lambda • Amazon API Gateway • Spring MVC • Debugging • Next Steps
- 5. A Microservice… • Isa service with one narrowly defined focused • Is individually deployable • Consists of one or more process • Owns its data store • Is replaceable
- 6. Amazon Web Services •We’ve decided to move to AWS • Two phases: • Now - Lift and Shift - get it running on EC2 • Later - Microservices & Client-side - bust it apart
- 7.
- 8. History • Announced in2011 by JetBrains • Open sourced in 2012 under Apache 2 • Version 1.0 released February 2016 • May 2017 Google Kotlin an Android language
- 9. Features • Makes appsfor Android, JVM, Browser, and Native • 100% interoperable with Java • Clean, succinct syntax • Null-pointer exception safety • Lambda functions and other function features
- 10.
- 11. Treat AWS LikeMoney • If your account is compromised, it can be very bad • Criminals can easily charge thousands of $$$ of AWS services to you in minutes • Never use your root account • Always use 2FA
- 12. AWS Lambda • Runscode without provisioning servers • Pay only for compute time used • Scales automatically • Uses CloudWatch for monitoring • Execution environment is Amazon Linux
- 13. Lambda Pricing: Request •You are charged for the number of requests + • You are charged for the duration of the request • The first 1 million requests are free • $0.20 per 1 million requests after the first million
- 14. Lambda Pricing: Duration •Duration is per second round up to the nearest 100ms • You are charged $0.00001667 for every GB- second used • The first 400,000 GB/seconds is free • Faster and smaller lambdas are cheaper
- 15. Lambda Languages C# No Java*8 Node.js 4.3 Node.js 6.10 Python 2.7 Python 3.6
- 16.
- 17.
- 18. AWS API Gateway •Fully managed service for programmatically creating APIs • Tightly integrates with Lambda • Combines with CloudFront for edge caching • Think of it as a flexible front door for your API
- 19.
- 20. RESTful API • Makesuse of HTTP methodologies defined by RFC 2616 protocol • Preferred over SOAP since it uses less bandwidth • Breaks down a transaction into a series of HTTP methods • Stateless by design
- 21. GET Method GET /resource Requesthas body No Successful response has body Yes Safe Yes Idempotent Yes Cacheable Yes
- 22. HEAD Method HEAD /resource(HEAD * ) Request has body No Successful response has body No Safe Yes Idempotent Yes Cacheable Yes
- 23. POST Method POST /resource Requesthas body Yes Successful response has body Yes Safe No Idempotent No Cacheable No*
- 24. PUT Method PUT /new-resource Requesthas body Yes Successful response has body No Safe No Idempotent Yes Cacheable No
- 25. PATCH Method PATCH /resource Requesthas body Yes Successful response has body No Safe No Idempotent No Cacheable No
- 26. DELETE Method DELETE /resource Requesthas body No Successful response has body No Safe No Idempotent Yes Cacheable No
- 27. OPTIONS Method OPTIONS /resource Requesthas body No Successful response has body Yes Safe Yes Idempotent No Cacheable No
- 28.
- 29. Spring Framework • Anapplication framework and IOC container for Java* • Created by Rod Johnson in 2002 • Released under Apache 2.0 in June 2003
- 30. Spring MVC • Model-View-ControllerWeb App Framework • Implements the strategy pattern • Easier testing than most web frameworks
- 31. HTTP Method Shortcuts Get@GetMapping Post @PostMapping Put @PutMapping Delete @DeleteMapping Patch @PatchMapping
- 32. Head and Options •@GetMapping and @RequestMapping(method=HttpMethod.GET) support Head transparently • Options is handled automatically
- 33. Debugging • System.out() orSystem.err() goes to log • View the logs via CloudWatch • This is no way to debug code
- 34. Local Debugging • Luckilywe still run our app locally • Using a modern IDE, we can set breakpoints
- 35. It Ain’t Paradise •Cold start time can be long • Not a lot of documentation • Tooling is rough
- 36. Next Steps • Goalis to get compiled size down • And the execution speed up • Planning to try RatPack • Also KotlinNative -
- 37. Links • https://github.com/awslabs/lambda-kotlin-groovy- example • https://www.infoq.com/articles/Ratpack-and-Spring-Boot •https://aws.amazon.com/blogs/compute/kotlin-and- groovy-jvm-languages-with-aws-lambda/ • https://github.com/awslabs/aws-serverless-java-container • https://kotlinlang.org/docs/tutorials/spring-boot- restful.html