Fix aot-basic example: timer header regression and native-image reflection gaps - #198
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Fix aot-basic example: timer header regression and native-image reflection gaps#198Croway wants to merge 3 commits into
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…ction gaps
The three routes (Java, YAML, XML DSL) logged an empty string for
${header.CamelTimerFiredTime} instead of the timestamp shown in the README.
camel-timer stopped populating fired-time/metadata headers by default in
Camel 4.1 (CAMEL-19817); fix by adding includeMetadata=true to each timer
endpoint, matching the pattern already used in the kafka-oauth example.
Also fixed native-image support, which was previously untested (no local
GraalVM). Building with a current GraalVM (25.3.4 CE) failed at runtime with
MissingReflectionRegistrationError for several Camel-internal classes that
are instantiated via reflection outside of Spring AOT's visibility (type
converter loaders, the Simple/Constant languages, the timer/bean components,
XML/YAML route loaders, etc.), plus a missing SPI resource
(resource-resolver/source) and an unsupported UTF-32BE charset used by
snakeyaml. Added reflect-config.json/resource-config.json (generated via the
GraalVM tracing agent) and a native-image.properties enabling
-H:+AddAllCharsets under META-INF/native-image so `mvn -Pnative
native:compile` produces a working native executable.
Verified: JVM mode (mvn spring-boot:run and java -jar) and native mode
(mvn -Pnative native:compile followed by running the built executable) all
show real timestamps and start successfully, native image starting in ~1ms
of Camel context startup / ~66ms total.
Updated the stale README sample output (Spring Boot 3.1.0 / Camel
4.0.0-SNAPSHOT) to match the current Spring Boot 4.1.1 / Camel
4.23.0-SNAPSHOT versions and current timings, and simplified the GraalVM
install steps since recent distributions bundle native-image by default.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EV52HxRX2Ws2u8m575mmpv
Croway
marked this pull request as draft
September 3, 2026 17:38
oscerd
approved these changes
Sep 3, 2026
…etadata.json Replace the classic split reflect-config.json/resource-config.json with the single reachability-metadata.json format GraalVM now prefers, and rename the sibling META-INF/native-image directory (previously only holding the charsets native-image.properties) to reflect that it now also carries this merged reflection/resource metadata. Kept it in a sibling artifact-id directory rather than the example's own (org.apache.camel.springboot.example/camel-example-spring-boot-aot-basic) because Spring AOT's process-aot goal generates its own reachability-metadata.json at that exact path; placing another file there would risk collision during the resource merge into target/classes. Verified with a clean mvn -Pnative native:compile followed by running the built executable: all three routes still start and log real timestamps. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01EV52HxRX2Ws2u8m575mmpv
Add a concise recipe to the README (tracing agent, diffing against what Spring AOT and the dependency jars already cover, iterating native builds against the exact GraalVM error messages) so the reachability-metadata.json can be regenerated when the Spring Boot/Camel/GraalVM versions change. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01EV52HxRX2Ws2u8m575mmpv
Croway
marked this pull request as ready for review
September 4, 2026 07:29
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Summary
${header.CamelTimerFiredTime}resolving to an empty string in all three routes (Java/YAML/XML DSL). camel-timer stopped populating the fired-time/metadata headers by default in Camel 4.1 (CAMEL-19817); the fix addsincludeMetadata=trueto each timer endpoint, matching the pattern already used in thekafka-oauthexample.MissingReflectionRegistrationErrorfor several Camel-internal classes instantiated via reflection outside of Spring AOT's visibility (type converter loaders, the Simple/Constant languages, the timer/bean components, XML/YAML route loaders, etc.), plus a missing SPI resource (resource-resolver/source) and an unsupportedUTF-32BEcharset used by snakeyaml. Addedreflect-config.json/resource-config.json(generated via the GraalVM tracing agent) and anative-image.propertiesenabling-H:+AddAllCharsetsunderMETA-INF/native-imagesomvn -Pnative native:compilenow produces a working native executable.native-imageby default.Test plan
mvn spring-boot:run(JVM mode) — all three routes log a real timestamp for${header.CamelTimerFiredTime}java -jar target/camel-example-spring-boot-aot-basic-*.jar— same, ~1.2s startupmvn -Pnative native:compilewith GraalVM CE 25.3.4 (installed via sdkman) — builds successfullymvn clean+ native rebuild + run) to confirm reproducibility🤖 Generated with Claude Code
https://claude.ai/code/session_01EV52HxRX2Ws2u8m575mmpv