Serverless Java with Spring Boot

Applications in a microservices architecture can communicate with each other in different ways. Adopting an event-driven paradigm based on asynchronous messaging provides services with a way of communicating while reducing runtime coupling. Applications in a microservices architecture can communicate with each other in different ways. Adopting an event-driven paradigm based on asynchronous messaging provides services with a way of communicating while reducing runtime coupling. Functions are a natural way of implementing event-driven business logic regarding suppliers, processors, and consumers. Furthermore, when going serverless, we aim at executables with instant startup and efficiency. Enter Spring.

Spring Cloud Function favours using the functional programming paradigm to implement your business logic and provides useful features to build data pipelines, including type conversion and function composition. Functions can be exposed through different options (like web endpoints or message channels), and adapters can run them on platforms like Knative, AWS Lambda, Azure Functions, and GCP Functions.

Spring Cloud Stream integrates your functions with messaging systems like RabbitMQ and Kafka without requiring any change to your code.

Finally, Spring Native lets you compile your applications as native executables using GraalVM and provides instant startup, instant peak performance, and reduced memory consumption.

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1. Thomas Vitale DevTalks June 8th, 2022 Serverless Java With Spring Boot @vitalethomas
2. Systematic • Software Architect at Systematic, Denmark. • Author of “Cloud Native Spring in Action” (Manning). • Spring Security and Spring Cloud contributor. Thomas Vitale thomasvitale.com @vitalethomas
3. Serverless thomasvitale.com @vitalethomas
4. Serverless Architectures Developers focus on code Focus on business logic Developer Platform Infrastructure Provisioning Workload Management Autoscaling Scaling to zero thomasvitale.com @vitalethomas
5. Spring Native thomasvitale.com @vitalethomas
6. Spring Native Native executables with GraalVM Slower Heavier Build Instant Startup Reduced Memory Consumption Instant Peak Performance Fewer Runtime Optimizations thomasvitale.com @vitalethomas
7. Packaging Spring Boot JAR and native thomasvitale.com @vitalethomas JAR Native Gradle bootJar Maven spring-boot:repackage Gradle nativeCompile Maven -Pnative package
8. Packaging Spring Boot Container images with Cloud Native Buildpacks thomasvitale.com @vitalethomas Container Image Gradle bootBuildImage Maven spring-boot:build-image
9. Knative thomasvitale.com @vitalethomas
10. Knative Serving Serverless Containers on Kubernetes Developer-friendly abstractions From code to URL Autoscaling Scaling to zero Progressive Rollouts Request-driven Event-driven Cloud agnostic thomasvitale.com @vitalethomas
11. Serverless experience on Kubernetes From containers to deployment with Knative Image pack kpack bootBuildImage kn URL Kubernetes Cluster Container Container Container Knative Serving thomasvitale.com @vitalethomas
12. Functions thomasvitale.com @vitalethomas
13. Functional Programming Paradigm Java 8 Functional Interfaces thomasvitale.com @vitalethomas Supplier<O> Function<I,O> Consumer<I>
14. Spring Cloud Function thomasvitale.com @vitalethomas
15. Spring Cloud Function Business logic as functions thomasvitale.com @vitalethomas Transparent Type Conversion Function Arity Function Composition Reactive Support JAR Functions
16. Spring Cloud Function Deployment and integrations thomasvitale.com @vitalethomas Knative CloudEvents RSocket Azure Functions Google Cloud Functions AWS Lambda
17. CloudEvents Interoperability and standardization Metadata Data Id Source Type Payload JSON AMQP Kafka MQTT thomasvitale.com @vitalethomas
18. Spring Cloud Stream thomasvitale.com @vitalethomas
19. Spring Cloud Stream Event-driven microservices thomasvitale.com @vitalethomas Integration with event brokers Bindings with functions Publish Subscribe Consumer Groups Partitions
20. 'HVWLQDWLRQ%LQGHU 'HVWLQDWLRQ %LQGLQJ .DIND 5DEELW04 )XQFWLRQ 6SULQJ%RRW$SSOLFDWLRQ 'HVWLQDWLRQ %LQGLQJ 6SULQJ&ORXG6WUHDP$SSOLFDWLRQ0RGHO thomasvitale.com @vitalethomas
21. Discount codes Manning • 35% discount code, valid for all products in all format • ctwdevtalksro22 • manning.com
22. https://github.com/ThomasVitale/awesome-spring
23. Resources Source code and more • Sample project: • https://github.com/ThomasVitale/devtalks-2022-serverless-java • Knative and Spring - Bringing back the func: • https://youtu.be/EKDYE_dStTI thomasvitale.com @vitalethomas
24. Thomas Vitale DevTalks June 8th, 2022 Serverless Java With Spring Boot @vitalethomas