CAMEL-24069: camel-spring-rabbitmq - Use consumer exception handler for async failures

[davsclaus]

Claude Code on behalf of davsclaus

Summary

When asyncConsumer=true and an exchange fails after the listener method has already returned (async completion), the failure was silently dropped because EndpointMessageListener called endpoint.getExceptionHandler() which is null by default, with no fallback.

The fix uses consumer.getExceptionHandler() instead, which always has a default LoggingExceptionHandler (set by DefaultConsumer constructor). This matches the canonical pattern used by DefaultConsumer.DefaultConsumerCallback and other components like camel-pulsar.

The same bug in camel-sjms has been filed as CAMEL-24083.

Changes

• EndpointMessageListener.java: Changed the async failure path from endpoint.getExceptionHandler() (nullable, no fallback) to consumer.getExceptionHandler() (always non-null)

Test plan

• All existing tests pass (mvn verify — 35 tests, 0 failures)

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[gnodet]

Clean, well-scoped fix that aligns the spring-rabbitmq async error handling with Camel's canonical pattern.

The key improvement: DefaultEndpoint.exceptionHandler is null by default (it's an optional user-configured field), so the old code silently swallowed async errors unless the user explicitly set an exception handler on the endpoint. DefaultConsumer.exceptionHandler is always initialized to a LoggingExceptionHandler, so errors will now always be logged/handled — and the exchange context is passed through for better diagnostics.

This matches the canonical pattern used in DefaultConsumer.DefaultConsumerCallback.done(), ApiConsumerHelper, and other consumer implementations across Camel.

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Claude Code review on behalf of @gnodet. This review was generated by an AI agent and may contain inaccuracies; please verify all suggestions before applying.

[github-actions]

🧪 CI tested the following changed modules:

• components/camel-spring-parent/camel-spring-rabbitmq

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🔬 Scalpel shadow comparison — Scalpel: 9 tested, 29 compile-only — current: 9 all tested

Maveniverse Scalpel detected 38 affected modules (current approach: 9).

⚠️ Modules only in Scalpel (29)

• apache-camel
• camel-allcomponents
• camel-catalog
• camel-catalog-console
• camel-catalog-lucene
• camel-catalog-maven
• camel-catalog-suggest
• camel-componentdsl
• camel-csimple-maven-plugin
• camel-endpointdsl
• camel-endpointdsl-support
• camel-itest
• camel-jbang-core
• camel-jbang-it
• camel-jbang-main
• camel-jbang-plugin-edit
• camel-jbang-plugin-generate
• camel-jbang-plugin-kubernetes
• camel-jbang-plugin-test
• camel-kamelet-main
• camel-launcher
• camel-report-maven-plugin
• camel-route-parser
• camel-yaml-dsl
• camel-yaml-dsl-deserializers
• camel-yaml-dsl-maven-plugin
• coverage
• docs
• dummy-component

Skip-tests mode would test 9 modules (1 direct + 8 downstream), skip tests for 29 (generated code, meta-modules)

Modules Scalpel would test (9)

• camel-jbang-mcp
• camel-jbang-plugin-mcp
• camel-jbang-plugin-route-parser
• camel-jbang-plugin-tui
• camel-jbang-plugin-validate
• camel-launcher-container
• camel-spring-rabbitmq
• camel-yaml-dsl-validator
• camel-yaml-dsl-validator-maven-plugin

Modules with tests skipped (29)

• apache-camel
• camel-allcomponents
• camel-catalog
• camel-catalog-console
• camel-catalog-lucene
• camel-catalog-maven
• camel-catalog-suggest
• camel-componentdsl
• camel-csimple-maven-plugin
• camel-endpointdsl
• camel-endpointdsl-support
• camel-itest
• camel-jbang-core
• camel-jbang-it
• camel-jbang-main
• camel-jbang-plugin-edit
• camel-jbang-plugin-generate
• camel-jbang-plugin-kubernetes
• camel-jbang-plugin-test
• camel-kamelet-main
• camel-launcher
• camel-report-maven-plugin
• camel-route-parser
• camel-yaml-dsl
• camel-yaml-dsl-deserializers
• camel-yaml-dsl-maven-plugin
• coverage
• docs
• dummy-component

ℹ️ Shadow mode — Scalpel observes but does not affect test execution. Learn more

All tested modules (38 modules)

• Camel :: All Components Sync point
• Camel :: Assembly
• Camel :: Catalog :: CSimple Maven Plugin (deprecated)
• Camel :: Catalog :: Camel Catalog
• Camel :: Catalog :: Camel Report Maven Plugin
• Camel :: Catalog :: Camel Route Parser
• Camel :: Catalog :: Console
• Camel :: Catalog :: Dummy Component
• Camel :: Catalog :: Lucene (deprecated)
• Camel :: Catalog :: Maven
• Camel :: Catalog :: Suggest
• Camel :: Component DSL
• Camel :: Coverage
• Camel :: Docs
• Camel :: Endpoint DSL
• Camel :: Endpoint DSL :: Support
• Camel :: Integration Tests
• Camel :: JBang :: Core
• Camel :: JBang :: Integration tests
• Camel :: JBang :: MCP
• Camel :: JBang :: Main
• Camel :: JBang :: Plugin :: Edit
• Camel :: JBang :: Plugin :: Generate
• Camel :: JBang :: Plugin :: Kubernetes
• Camel :: JBang :: Plugin :: MCP
• Camel :: JBang :: Plugin :: Route Parser
• Camel :: JBang :: Plugin :: TUI
• Camel :: JBang :: Plugin :: Testing
• Camel :: JBang :: Plugin :: Validate
• Camel :: Kamelet Main
• Camel :: Launcher
• Camel :: Launcher :: Container
• Camel :: Spring RabbitMQ
• Camel :: YAML DSL
• Camel :: YAML DSL :: Deserializers
• Camel :: YAML DSL :: Maven Plugins
• Camel :: YAML DSL :: Validator
• Camel :: YAML DSL :: Validator Maven Plugin

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[oscerd]

LGTM. Same improvement as the camel-sjms sibling (#24722): the async-failure path now uses consumer.getExceptionHandler().handleException("Error processing exchange", exchange, rce), routing through the consumer's exception handler with the exchange context instead of the endpoint-handler overload that dropped it. CI green.

Reviewed with Claude Code on behalf of Andrea Cosentino. This review was generated by an AI agent and may contain inaccuracies; please verify all suggestions before applying.