Next-Generation Cloud Native Apps with Spring Boot 3

The recent release of Spring Boot 3 and Spring Framework 6 laid the foundation for the next generation of modern Java applications. This session will highlight what’s new, and demonstrate patterns and techniques for cloud-native development.

Support for generating native images with GraalVM is now part of the core framework, making it straightforward to build efficient applications with instant startup time and reduced memory consumption. The new Java 17 baseline and support for Jakarta EE 10 unlocks many new features and integrations. Observability is now a core tenet of the Spring ecosystem, with monitoring and tracing built into each Spring module and powered by Micrometer and OpenTelemetry. Web applications can now rely on new features to handle errors based on the Problem Details for HTTP APIs specification. Finally, HTTP clients can now be powered by convenient interfaces for which the framework generates the implementation.

Transcript

1. Thomas Vitale Systematic Feb 16th, 2023 Next-Generation Cloud Native Apps with Spring Boot 3 @vitalethomas
2. Systematic • Architect at Systematic, Denmark. • Author of “Cloud Native Spring in Action” (Manning). • OSS contributor (Java, Spring, Cloud Native Technologies) Thomas Vitale thomasvitale.com @vitalethomas
3. Spring @vitalethomas
4. thomasvitale.com @vitalethomas https://spring.io @vitalethomas
5. Java 17 @vitalethomas
6. Java 8 -> 11 -> 17 Performance improvements @vitalethomas Java 8 ‣Startup: 3.784 s ‣Max heap used: 113 MiB ‣Committed heap: 177 MiB Java 11 ‣Startup: 2.204 s ‣Max heap used: 43 MiB ‣Committed heap: 74 MiB Java 17 ‣Startup: 1.776 s ‣Max heap used: 37 MiB ‣Committed heap: 55 MiB
7. Data Persistence @vitalethomas
8. Data Integration Spring Data for Relational Databases Spring Data JPA ‣JPA & Hibernate ‣Repositories ‣JDBC Spring Data JDBC ‣DDD Principles ‣Repositories ‣JDBC Spring Data R2DBC ‣DDD Principles ‣Repositories ‣R2DBC @vitalethomas
9. Schema and data management Flyway: Version control for your database SQL Migrations Schema changes Java Migrations Data changes V1 Init schema V2 Add column V3 Create table V4 Add constraint time @vitalethomas
10. Testing @vitalethomas
11. Testing Spring Boot Types of auto tests for Spring Boot applications Unit Tests ‣JUnit ‣Mockito ‣No Spring context Integration Tests ‣@SpringBootTest ‣Web server ‣Full Spring context Slice Tests ‣@SpringWebMvc ‣@SpringDataR2dbc ‣Sliced Spring context @vitalethomas
12. Testcontainers Testing with external dependencies Docker containers Run external dependencies as Docker containers Data Layer Tests Ensure environment parity by testing the data layer with the real database Integration Tests Use containers for databases, message queues, and web servers @vitalethomas
13. Jakarta EE 9/10 @vitalethomas
14. From Java EE to Jakarta EE New package names since Jakarta EE 9 import javax.persistence.Entity; import javax.servlet.Servlet; import javax.validation.Valid; @vitalethomas import jakarta.persistence.Entity; import jakarta.servlet.Servlet; import jakarta.validation.Valid;
15. https://docs.openrewrite.org @vitalethomas
16. Problem Details @vitalethomas
17. https://www.rfc-editor.org/rfc/rfc7807 @vitalethomas
18. Deployment @vitalethomas
19. Packaging Spring Boot JAR & Container Image JAR Container Image Gradle bootJar Maven spring-boot:repackage Gradle bootBuildImage Maven spring-boot:build-image @vitalethomas
20. Image pack build Cloud Native Buildpacks From source code to container image @vitalethomas
21. Native Images @vitalethomas
22. Spring Boot 3 and Native Images Native executables with GraalVM Slower Heavier Build Instant Startup Reduced Memory Consumption Instant Peak Performance Fewer Runtime Optimizations @vitalethomas
23. Declarative Clients @vitalethomas
24. Observability @vitalethomas
25. Monitoring and management Operating applications in production Spring Boot Actuator ‣Health (liveness and readiness) ‣Metrics (Prometheus, OpenMetrics) ‣Flyway, Thread Dumps, Heap Dumps Micrometer Tracing ‣Distributed tracing ‣Instrumentation ‣OpenZipkin and OpenTelemetry @vitalethomas
26. grafana.com @vitalethomas
27. https://github.com/paketo-buildpacks/opentelemetry @vitalethomas
28. https://github.com/paketo-buildpacks/samples/tree/main/java/opentelemetry @vitalethomas tasks.named('bootBuildImage') { buildpacks = [ "paketo-buildpacks/java", "gcr.io/paketo-buildpacks/opentelemetry" ] environment = ["BP_OPENTELEMETRY_ENABLED": "true"] } OpenTelemetry Support in Paketo Buildpacks
29. Resources @vitalethomas
30. https://github.com/ThomasVitale/spring-boot-next-gen-apps
31. https://github.com/ThomasVitale/awesome-spring
32. https://tanzu.vmware.com/developer/tv/golden-path/8/
33. Thomas Vitale Systematic Feb 16th, 2023 Next-Generation Cloud Native Apps with Spring Boot 3 @vitalethomas