chore: fix Vertex AI global region URL in LlmClient

[davsclaus]

Summary

• LlmClient.resolveAnthropicUrl() built the Vertex AI Anthropic endpoint by always prefixing the host with <region>-. That's correct for regional locations (e.g. us-east5) but wrong for the global location, whose actual host is aiplatform.googleapis.com with no region prefix.
• With CLOUD_ML_REGION=global set, requests went to the non-existent host global-aiplatform.googleapis.com, causing the TUI's F8 AI panel and camel ask/explain/harden to fail with a generic "LLM request failed" error whenever the Vertex AI auto-detect path was used with the global region.
• Special-case global to omit the region prefix from the host while keeping locations/global in the path.

Test plan

• mvn -q -DskipTests install on camel-jbang-core
• mvn formatter:format impsort:sort — no changes needed
• Reproduced the original failure live in the TUI's F8 AI panel with CLOUD_ML_REGION=global + ANTHROPIC_VERTEX_PROJECT_ID set and no ANTHROPIC_API_KEY

Claude Code on behalf of davsclaus

🤖 Generated with Claude Code

[github-actions]

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[github-actions]

🧪 CI tested the following changed modules:

• dsl/camel-jbang/camel-jbang-core

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🔬 Scalpel shadow comparison — Scalpel: 7 tested, 8 compile-only — current: 6 all tested

Maveniverse Scalpel detected 15 affected modules (current approach: 6).

⚠️ Modules only in Scalpel (9)

• 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-launcher
• coverage

Skip-tests mode would test 7 modules (1 direct + 6 downstream), skip tests for 8 (generated code, meta-modules)

Modules Scalpel would test (7)

• camel-jbang-core
• camel-jbang-mcp
• camel-jbang-plugin-mcp
• camel-jbang-plugin-route-parser
• camel-jbang-plugin-tui
• camel-jbang-plugin-validate
• camel-launcher-container

Modules with tests skipped (8)

• camel-jbang-it
• camel-jbang-main
• camel-jbang-plugin-edit
• camel-jbang-plugin-generate
• camel-jbang-plugin-kubernetes
• camel-jbang-plugin-test
• camel-launcher
• coverage

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

⚠️ Some tests are disabled on GitHub Actions (@DisabledIfSystemProperty(named = "ci.env.name")) and require manual verification:

• dsl/camel-jbang/camel-jbang-core: 1 test(s) disabled on GitHub Actions

💡 Manual integration tests recommended:

You modified dsl/camel-jbang/camel-jbang-core. The related integration tests in dsl/camel-jbang/camel-jbang-it are excluded from CI. Consider running them manually:

mvn verify -f dsl/camel-jbang/camel-jbang-it -Djbang-it-test

All tested modules (15 modules)

• Camel :: Coverage
• 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 :: Launcher
• Camel :: Launcher :: Container

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⚙️ View full build and test results

[gnodet]

Correct fix for Vertex AI global region URL construction. When vertexRegion is "global", the hostname should be aiplatform.googleapis.com (no region prefix), not global-aiplatform.googleapis.com. The fix is consistent with how the camel-google-vertexai component handles the same case in PredictionServiceClientFactory.java.

📋 PR Metadata

Aspect	Current	Suggested
Category	chore (title)	bug (this fixes incorrect behavior)
Labels	dsl	+ bug
Milestone	(none)	4.23.0

🔀 Backport Status

⚠️ This bug fix targets main but the same file exists on camel-4.22.x. Consider backporting.

• camel-4.22.x — no backport PR found
• camel-4.18.x — file does not exist, no backport needed

This review was generated by an AI agent and may contain inaccuracies. Please verify all suggestions before applying.

Claude Code on behalf of Guillaume Nodet