注解驱动的知识中枢：MCPServer赋能AI业务的技术架构与实践

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
public @interface JDocumentType {
    String name();                // 文档类型名称
    String fsPath();              // VFS存储根路径
    String vfsJson() default "";  // VFS存储配置(JSON格式)
    String indexWriter() default "default"; // 索引写入器名称
    boolean sharding() default false; // 是否启用索引分片
    String[] shardFields() default {}; // 分片字段
}

@JDocumentType(
    name = "file_index",
    fsPath = "/vfs/knowledge/files",
    vfsJson = "{\"storage\":\"minio\",\"bucket\":\"knowledge\"}",
    indexWriter = "fileIndexWriter"
)
public class FileIndex {
    @JFieldType(store = Store.YES, index = Index.YES, analyzer = "ik_max_word")
    private String name;
    
    @JFieldType(store = Store.YES, index = Index.NO)
    private String userId;
    
    @JFieldType(store = Store.YES, index = Index.YES, highlighter = true)
    private String text;
    
    @VFSJsonType(pathField = "docpath", contentField = "text")
    private String docpath;
}

public interface VFSService {
    // 获取文件元数据
    VFSFileMeta getFileMeta(String vfsPath) throws VFSException;
    
    // 打开文件输入流
    InputStream openInputStream(String vfsPath) throws VFSException;
    
    // 创建文件输出流
    OutputStream openOutputStream(String vfsPath) throws VFSException;
    
    // 文件复制（跨存储）
    void copy(String srcVfsPath, String destVfsPath) throws VFSException;
}

@Service
public class IndexService {
    @Autowired
    private IndexWriterManager indexWriterManager;
    
    @Autowired
    private VFSService vfsService;
    
    public void createIndex(Object document) throws IndexException {
        // 解析类级注解
        JDocumentType docType = AnnotationUtils.getAnnotation(document.getClass(), JDocumentType.class);
        
        // 创建Lucene文档
        Document luceneDoc = new Document();
        
        // 处理字段级注解
        processFields(document, luceneDoc);
        
        // 处理VFS文件内容
        processVFSContent(document, luceneDoc, docType);
        
        // 写入索引
        IndexWriter writer = indexWriterManager.getWriter(docType.indexWriter());
        writer.addDocument(luceneDoc);
        writer.commit();
    }
}

// AI送货单系统中调用MCPServer进行专业术语校验
boolean isValidProduct = mcpserver.validateTerm("electronics_kb", order.getProductType());
if (!isValidProduct) {
    // 获取推荐术语
    List<String> suggestions = mcpserver.suggestTerms("electronics_kb", order.getProductType(), 3);
    throw new BusinessException("产品类型无效，建议使用: " + String.join(", ", suggestions));
}

@AIGCDelivery(
    businessType = "electronics",
    validateGroups = {"basic", "inventory", "logistics"},
    inventoryArea = "south_china",
    knowledgeBase = "electronics_delivery_kb"
)
public class DeliveryOrder {
    @JFieldType(store = Store.YES, index = Index.NO)
    private String orderId;
    
    @JFieldType(store = Store.YES, index = Index.YES)
    private String customerName;
    
    @JFieldType(type = FieldType.DATE)
    private Date deliveryDate;
    
    @AIGCMethod(handler = "inventoryCheckHandler")
    public boolean checkInventory() {
        // 调用MCPServer查询库存知识库
        return mcpserver.search("inventory_kb", 
            QueryBuilder.term("productId", this.productId)
                        .and(term("area", this.inventoryArea))
                        .and(range("quantity").gte(this.quantity))
        ).getTotalHits() > 0;
    }
}