Recipes to upgrade to Spring Framework 6.2

[timtebeek]

We want to support migrations to Spring Framework 6.2, as part of a migration to Spring Boot 3.4.

Here's a quick link to the release notes: https://github.com/spring-projects/spring-framework/wiki/Spring-Framework-6.2-Release-Notes

And here's an incomplete list of necessary steps for this migration:

• Deprecated APIs removed in Remove APIs deprecated for removal in 6.2 spring-projects/spring-framework#30608
  • Add Recipe to migrate org.springframework.web.reactive.HandlerResult.hasExceptionHandler to getExceptionHandler() method #693
  • Add Recipe to migrate org.springframework.util.Base64Utils to java.util.Base64 #689
• Additional APIs removed in Remove additional APIs deprecated for removal in 6.2 spring-projects/spring-framework#33123
• WebContentGenerator removed in Remove deprecated API from WebContentGenerator spring-projects/spring-framework#31492
• Migrating from HtmlUnit 2.x.x to HtmlUnit 3.x.x as per https://htmlunit.sourceforge.io/migration.html
  • Move HtmlUnit migrations to rewrite-testing-frameworks rewrite-testing-frameworks#643
  • Include the HtmlUnit migrations with the Spring Framework 6.2 upgrade: https://docs.openrewrite.org/recipes/java/testing/htmlunit/upgradehtmlunit_3

We welcome anyone to pick off individual items here in pull requests, even if it's just a draft PR with unit tests added.

[A1016375]

Hi any tentative time to get Spring Boot 3.4 recipe ready? As I have tried activeRecipe("org.openrewrite.java.spring.boot3.UpgradeSpringBoot_3_4") but it's not working and showing org.openrewrite.RecipeException: Recipe(s) not found: org.openrewrite.java.spring.boot3.UpgradeSpringBoot_3_4

Also are we going to include changes of @mockBean & @sypbean as per https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-3.4-Release-Notes#deprecation-of-mockbean-and-spybean

[timtebeek]

hi! Those recipes first have to be written and contributed to the project; I've logged a small break down of tasks for Spring Boot:

• Recipes to upgrade to Spring Boot 3.4 #642

Welcome to help out on either the steps here or on that other issue.

[timtebeek]

This PR from @wapkch helpfully includes some of the steps above already:

• Add Recipe to migrate org.springframework.web.reactive.HandlerResult.hasExceptionHandler to getExceptionHandler() method #693
• Add Recipe to migrate org.springframework.util.Base64Utils to java.util.Base64 #689