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.

Transcript

1. Thomas Vitale
   DevTalks
   June 8th, 2022
   Serverless Java
   With Spring Boot
   @vitalethomas
   

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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
   

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3. Serverless
   thomasvitale.com @vitalethomas
   

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4. Serverless Architectures
   Developers focus on code
   Focus on business logic
   Developer
   Platform
   Infrastructure
   
   Provisioning
   Workload
   
   Management
   Autoscaling
   
   Scaling to zero
   thomasvitale.com @vitalethomas
   

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5. Spring Native
   thomasvitale.com @vitalethomas
   

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6. Spring Native
   Native executables with GraalVM
   Slower
   
   Heavier
   
   Build
   Instant
   
   Startup
   Reduced
   
   Memory
   
   Consumption
   Instant
   
   Peak
   
   Performance
   Fewer
   
   Runtime
   
   Optimizations
   thomasvitale.com @vitalethomas
   

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7. Packaging Spring Boot
   JAR and native
   thomasvitale.com @vitalethomas
   JAR
   Native
   Gradle
   
   
   bootJar
   Maven
   
   
   spring-boot:repackage
   Gradle
   
   
   nativeCompile
   Maven
   
   
   -Pnative package
   

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8. Packaging Spring Boot
   Container images with Cloud Native Buildpacks
   thomasvitale.com @vitalethomas
   Container Image
   Gradle
   
   
   bootBuildImage
   Maven
   
   
   spring-boot:build-image
   

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9. Knative
   thomasvitale.com @vitalethomas
   

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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
    

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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
    

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12. Functions
    thomasvitale.com @vitalethomas
    

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13. Functional Programming Paradigm
    Java 8 Functional Interfaces
    thomasvitale.com @vitalethomas
    Supplier Function Consumer
    

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14. Spring Cloud Function
    thomasvitale.com @vitalethomas
    

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15. Spring Cloud Function
    Business logic as functions
    thomasvitale.com @vitalethomas
    Transparent
    
    Type
    
    Conversion
    Function
    
    Arity
    Function
    
    Composition
    Reactive
    
    Support
    JAR
    
    Functions
    

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16. Spring Cloud Function
    Deployment and integrations
    thomasvitale.com @vitalethomas
    Knative CloudEvents RSocket
    Azure
    
    Functions
    Google Cloud
    Functions
    AWS
    
    Lambda
    

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17. CloudEvents
    Interoperability and standardization
    Metadata
    Data
    Id
    
    Source
    
    Type
    Payload
    JSON
    
    AMQP
    
    Kafka
    
    MQTT
    thomasvitale.com @vitalethomas
    

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18. Spring Cloud Stream
    thomasvitale.com @vitalethomas
    

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19. Spring Cloud Stream
    Event-driven microservices
    thomasvitale.com @vitalethomas
    Integration with
    event brokers
    Bindings
    
    with functions
    Publish
    
    Subscribe
    Consumer Groups Partitions
    

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21. Discount codes
    Manning
    • 35% discount code, valid for
    all products in all format
    
    • ctwdevtalksro22
    
    
    • manning.com
    

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22. https://github.com/ThomasVitale/awesome-spring
    

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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
    

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24. Thomas Vitale
    DevTalks
    June 8th, 2022
    Serverless Java
    With Spring Boot
    @vitalethomas
    

    View Slide