lhpqaq opened a new pull request, #291:
URL: https://github.com/apache/bigtop-manager/pull/291
## Migration Plan: Replace LangChain4j with Spring AI
This PR migrates the AI module from **LangChain4j** to **Spring AI**,
aligning the implementation with the Spring ecosystem and simplifying future
maintenance.
### Completed Tasks
- [x] Update BOM dependencies
- Remove `langchain4j`
- Add required Spring AI modules
- [x] Update `bigtop-manager-ai` module dependencies in `pom.xml`
- [x] Refactor core interfaces and abstractions
- [x] Update `AIAssistant` interface to use Spring AI types
- [x] Update `AbstractAIAssistant` to use Spring AI types
- [x] Update `PersistentChatMemoryStore` to implement
`ChatMemoryRepository`
- [x] Migrate platform implementations
- [x] `OpenAIAssistant` – migrated to Spring AI OpenAI client
- [x] `DeepSeekAssistant` – implemented using Spring AI
- [x] `QianFanAssistant` – implemented using Spring AI
- [x] `DashScopeAssistant` – implemented using Spring AI
- [x] Update tests
- [x] `PersistentChatMemoryStoreTest`
- [x] `GeneralAssistantFactoryTest`
- [x] All tests passing
- [x] Build and verify
- [x] AI module builds and tests successfully
- [x] Fixed `RestClient` dependency issue by upgrading Spring Boot
### Pending Tasks
- [ ] Manual runtime verification
- [x] `DashScopeAssistant`
- [ ] `OpenAIAssistant`
- [ ] `DeepSeekAssistant`
- [ ] `QianFanAssistant`
- [ ] Refactor function-calling support
- Reimplement using Spring AI APIs, or
- Introduce a lightweight MCP-based client
---
## Implementation Notes
### AI Module Migration
- Migrated from **LangChain4j** to **Spring AI `1.0.0-RC1`**
- Replaced `ChatMemoryStore` with Spring AI’s `ChatMemoryRepository`
- A single `OpenAiChatModel` supports both synchronous and streaming calls
---
### Server Module
- Retained **LangChain4j** dependencies for tool/function calling:
- `ToolProvider`
- `ToolSpecification`
- `ToolExecutor`
- Tool migration to Spring AI is **out of scope** for this PR
- Added required dependencies:
- `dev.langchain4j:langchain4j`
- `org.jetbrains:annotations`
---
### Dependency Updates
- **Spring Boot** upgraded from `3.1.1` to `3.2.0`
- Required for **Spring Framework 6.1+**
- `RestClient` was introduced in Spring Framework 6.1
- Spring AI OpenAI integration depends on `RestClient`
- All tests pass after the upgrade
- **Note**:
- After upgrading, `@PathVariable` annotations must explicitly specify the
parameter name
(e.g. `@PathVariable(name = "id")`)
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