CAMEL-23939: Fix Kamelet dependencies ignored in Camel CLI

[davsclaus]

Summary

Claude Code on behalf of davsclaus

• Fix DelegatingSchemaResolver failing with NoClassDefFoundError when running Kamelets via Camel CLI
• The class has hard imports to AvroSchemaResolver, ProtobufSchemaResolver, JsonSchemaResolver from provided-scope dependencies that are downloaded into a child classloader at runtime
• Add a try/catch fallback: direct new is tried first (works on flat classpaths like Spring Boot), and on NoClassDefFoundError the resolver is loaded reflectively via CamelContext.getClassResolver() which can see dynamically downloaded JARs
• Implement CamelContextAware to get access to the ClassResolver

Root Cause

When DelegatingSchemaResolver was moved from camel-kamelets into camel-kamelet (CAMEL-21249), it ended up on the boot classpath while its provided dependencies (camel-jackson-avro, camel-jackson-protobuf, camel-jackson) are dynamically downloaded into a child DependencyDownloaderClassLoader. Parent-first delegation means the parent classloader (which loaded DelegatingSchemaResolver) cannot see the child's JARs.

Test plan

• Existing camel-kamelet tests pass (flat classpath path exercised)
• Manual verification with camel run using a Kamelet that declares camel:jackson-avro dependency

🤖 Generated with Claude Code

Co-Authored-By: Claude Opus 4.6 noreply@anthropic.com

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🧪 CI tested the following changed modules:

• components/camel-kamelet

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🔬 Scalpel shadow comparison — Scalpel: 12 tested, 29 compile-only — current: 12 all tested

Maveniverse Scalpel detected 41 affected modules (current approach: 12).

⚠️ 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 12 modules (1 direct + 11 downstream), skip tests for 29 (generated code, meta-modules)

Modules Scalpel would test (12)

• camel-jbang-mcp
• camel-jbang-plugin-mcp
• camel-jbang-plugin-route-parser
• camel-jbang-plugin-tui
• camel-jbang-plugin-validate
• camel-kamelet
• camel-launcher-container
• camel-test-main-junit5
• camel-test-main-junit6
• camel-xml-io-dsl
• 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 (41 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
• Camel :: Kamelet Main
• Camel :: Launcher
• Camel :: Launcher :: Container
• Camel :: Test :: Main :: JUnit5
• Camel :: Test :: Main :: JUnit6
• Camel :: XML DSL with camel-xml-io
• 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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