OpenAPITools / OpenAPITools/openapi-generator

[REQ] RestTemplate support for Spring boot 3

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#14,696 1 comment 6 reactions 0 assignees View on GitHub

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Enhancement: Feature
Dominant language
Java
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PR merge metrics
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Description

Is your feature request related to a problem? Please describe.

With the release of Spring Boot 3, it now uses JDK 17 and Spring Web 6. If you try using a Spring Boot 3 server with resttemplate generated client, it doesn't work because of some breaking changes with headers.

Describe the solution you'd like

The Spring Boot server generator uses a flag "useSpringBoot3", it'd be nice if we had that option with the Spring related clients (e.g. resttemplate and webclient)

Describe alternatives you've considered

Manually upgrading to Spring 6 when generating the client.

Additional context

N/A

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the Spring-related RestTemplate and WebClient client generators, then compare them with the Spring Boot server generator's existing useSpringBoot3 option. Inspect how generated clients handle headers under Spring Web 6. Done means the Spring clients expose the option and generate clients that work with Spring Boot 3 without manual Spring 6 upgrades.

Written by the indexing model from the issue text.

Assessment

Tech stack
java, spring, spring-boot
Domain
tooling
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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