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chore: migrate to Jackson 3 - #700
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Spring Boot 4 defaults to Jackson 3, drop the transitional
spring-boot-jackson2 module and Jackson 2 HTTP converter.
- com.fasterxml.jackson.{databind,core,dataformat} -> tools.jackson.*
(annotations stay in com.fasterxml.jackson.annotation)
- CustomObjectMapper now exposes a JsonMapper (picked up by Spring MVC)
and a YAMLMapper for Helm, built with the immutable builder API
- Restore the Jackson 2 defaults that Jackson 3 changed
(DEFAULT_VIEW_INCLUSION, SORT_PROPERTIES_ALPHABETICALLY,
FAIL_ON_NULL_FOR_PRIMITIVES, FAIL_ON_TRAILING_TOKENS, enums via
name(), ...) so the API contract does not change
- JsonNode: fields() -> properties(), asText() -> asString(), keeping
"null" rendering for null Helm values
- Jackson exceptions are now unchecked (JacksonException)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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ddecrulle
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Nov 4, 2026
Resolve import conflicts with the Jackson 3 migration (#700): keep the tools.jackson imports from main and the jakarta.annotation.PostConstruct switch from this branch. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Why
Spring Boot 4 uses Jackson 3 by default. #636 kept Jackson 2 through the deprecated
spring-boot-jackson2module +spring.http.converters.preferred-json-mapper=jackson2. This PR removes that transitional setup.What
com.fasterxml.jackson.{databind,core,dataformat}→tools.jackson.*in all 3 modules (annotations are unchanged:com.fasterxml.jackson.annotation).CustomObjectMappernow exposes aJsonMapper(@Primary, used by Spring MVC — Boot's auto-configured mapper backs off) and aYAMLMapperfor Helm, built with the immutable builder API (defaultSerializationView,changeDefaultPropertyInclusion).DEFAULT_VIEW_INCLUSION(otherwise every property without@JsonViewwould vanish, since a default view is set)SORT_PROPERTIES_ALPHABETICALLYoff,USE_GETTERS_AS_SETTERS,ALLOW_FINAL_FIELDS_AS_MUTATORS,FIX_FIELD_NAME_UPPER_CASE_PREFIXoff,DETECT_PARAMETER_NAMESoffFAIL_ON_NULL_FOR_PRIMITIVES/FAIL_ON_TRAILING_TOKENSoffname()(EnumFeature.READ/WRITE_ENUMS_USING_TO_STRINGoff)JsonNode:fields()→properties(),asText()→asString().asString()rendersnullas""(was"null") and throws on containers: both cases handled to keep previous behaviour (Helm env extraction,overwriteSchemaWith).JacksonException).Jackson 2 stays on the classpath transitively (fabric8, swagger) — expected, packages don't clash.
Verification
mvn test: 91 tests green,spotless:checkOK, no deprecated Jackson API left.authentication.mode=none) onmain(Jackson 2) and on this branch, and dumped/public/configuration,/public/regions,/public/catalogs,/public/schemas,/my-lab/catalogs, chart details, a launcher JSON schema,/user/info,/profile/schema, plus events, Helm values YAML and lenient/edge-case DTO input. Output is byte-identical, exceptbuild.timestampand catalogslastUpdateTime, which change on every start./my-lab/services, install…), OIDC mode.🤖 Generated with Claude Code