Josh Long

Bootiful Spring Boot 3

Build faster, more efficient microservices. Spring Boot 3 brings first-class GraalVM support for instant startup and a tiny memory footprint.

Bootiful Spring Boot 3
#1about 5 minutes

Getting started with a new Spring Boot 3 project

Bootstrap a new application using start.spring.io, selecting key dependencies and establishing the required Java 17 baseline.

#2about 5 minutes

Building a simple data-driven web service

Create a basic REST API using Java records for entities, JdbcTemplate for data access, and a standard RestController.

#3about 12 minutes

Improving production readiness with error handling and observability

Implement centralized error handling using Problem Details and add metrics and tracing with the unified Micrometer Observation API.

#4about 10 minutes

Understanding and building GraalVM native images

Learn how Spring Boot 3's ahead-of-time (AOT) engine supports GraalVM by analyzing the application context to generate the necessary native configuration.

#5about 2 minutes

Analyzing native image performance benefits

Observe the significant performance gains of a GraalVM native image, including near-instant startup times and a drastically reduced memory footprint.

#6about 2 minutes

Proxying requests with Spring Cloud Gateway

Use the RouteLocatorBuilder in Spring Cloud Gateway to programmatically define routes that proxy requests to downstream services with custom filters.

#7about 3 minutes

Creating declarative type-safe HTTP clients

Define a Java interface with @GetExchange annotations to let Spring Framework 6 automatically generate a type-safe, reactive HTTP client implementation.

#8about 10 minutes

Exposing a federated API with GraphQL

Combine data from downstream services into a single, unified graph by creating a GraphQL schema and implementing query resolvers in a Spring controller.

#9about 16 minutes

Q&A on GraalVM, Project Loom, and gRPC

Discuss the future of Java performance, including GraalVM adoption, the impact of Project Loom on reactive programming, and choosing between GraphQL and gRPC.

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