Release 9.1.0

Date: June 19, 2025

Juneau 9.1.0 is a major compatibility update focused on Jakarta EE migration and Spring Boot modernization.

Major Changes

Jakarta EE Migration

• Complete javax to jakarta namespace migration: All references to javax.* packages have been converted to their corresponding jakarta.* equivalents. This includes:
  • javax.servlet.* → jakarta.servlet.*
  • javax.validation.* → jakarta.validation.*
  • javax.ws.rs.* → jakarta.ws.rs.*
  • javax.json.* → jakarta.json.*
  • javax.annotation.* → jakarta.annotation.*

Spring Boot Upgrade

• Upgraded Spring Boot to 3.3: Updated Spring Boot dependency from 2.x to 3.3, bringing:
  • Spring Framework 6.x support
  • Java 17+ requirement
  • Enhanced performance and security
  • Native compilation support with GraalVM
  • Improved observability and metrics

Compatibility Notes

Breaking Changes

This release contains breaking changes due to the Jakarta EE migration:

• Java 17+ Required: Following Spring Boot 3.3 requirements
• Package Names Changed: All javax.* imports must be updated to jakarta.*
• Application Server Compatibility: Requires Jakarta EE 9+ compatible servers (Tomcat 10+, Jetty 11+)

Migration Guide

For Application Developers

1. Update Java Version: Ensure you're using Java 17 or later
2. Update Imports: Replace all javax.* imports with jakarta.*
3. Update Dependencies: Ensure all dependencies are Jakarta EE compatible
4. Update Application Servers: Use Jakarta EE 9+ compatible servers

For Spring Boot Applications

1. Update Spring Boot Version: Upgrade to Spring Boot 3.3+
2. Review Configuration: Some Spring Boot configuration properties may have changed
3. Test Thoroughly: The namespace migration affects all servlet and validation code

Benefits

• Future-Proof: Aligned with Jakarta EE standards and Spring Boot evolution
• Performance: Improved performance from Spring Boot 3.3 and Java 17+
• Security: Latest security updates from Spring Boot 3.3
• Ecosystem: Better compatibility with modern Jakarta EE ecosystem