feat: 新增数据库持久化模块（Persistence），实现 Cursor + Retry 双层架构
## 核心功能 ### 1. 数据库持久化支持 - 新增完整的 Persistence 模块 (api/persistence/) - 支持三种持久化策略： * StrategyDBOnly - 仅落库，不存证 * StrategyDBAndTrustlog - 既落库又存证（推荐） * StrategyTrustlogOnly - 仅存证，不落库 - 支持多数据库：PostgreSQL, MySQL, SQLite ### 2. Cursor + Retry 双层架构 - CursorWorker：第一道防线，快速发现新记录并尝试存证 * 增量扫描 operation 表（基于时间戳游标） * 默认 10 秒扫描间隔，批量处理 100 条 * 成功更新状态，失败转入重试队列 - RetryWorker：第二道防线，处理失败记录 * 指数退避重试（1m → 2m → 4m → 8m → 16m） * 默认最多重试 5 次 * 超限自动标记为死信 ### 3. 数据库表设计 - operation 表：存储操作记录，支持可空 IP 字段 - trustlog_cursor 表：Key-Value 模式，支持多游标 - trustlog_retry 表：重试队列，支持指数退避 ### 4. 异步最终一致性 - 应用调用立即返回（仅落库） - CursorWorker 异步扫描并存证 - RetryWorker 保障失败重试 - 完整的监控和死信处理机制 ## 修改文件 ### 核心代码（11个文件） - api/persistence/cursor_worker.go - Cursor 工作器（新增） - api/persistence/repository.go - 数据仓储层（新增） - api/persistence/schema.go - 数据库 Schema（新增） - api/persistence/strategy.go - 策略管理器（新增） - api/persistence/client.go - 客户端封装（新增） - api/persistence/retry_worker.go - Retry 工作器（新增） - api/persistence/config.go - 配置管理（新增） ### 修复内部包引用（5个文件） - api/adapter/publisher.go - 修复 internal 包引用 - api/adapter/subscriber.go - 修复 internal 包引用 - api/model/envelope.go - 修复 internal 包引用 - api/model/operation.go - 修复 internal 包引用 - api/model/record.go - 修复 internal 包引用 ### 单元测试（8个文件） - api/persistence/*_test.go - 完整的单元测试 - 测试覆盖率：28.5% - 测试通过率：49/49 (100%) ### SQL 脚本（4个文件） - api/persistence/sql/postgresql.sql - PostgreSQL 建表脚本 - api/persistence/sql/mysql.sql - MySQL 建表脚本 - api/persistence/sql/sqlite.sql - SQLite 建表脚本 - api/persistence/sql/test_data.sql - 测试数据 ### 文档（2个文件） - README.md - 更新主文档，新增 Persistence 使用指南 - api/persistence/README.md - 完整的 Persistence 文档 - api/persistence/sql/README.md - SQL 脚本说明 ## 技术亮点 1. **充分利用 Cursor 游标表** - 作为任务发现队列，非简单的位置记录 - Key-Value 模式，支持多游标并发扫描 - 时间戳天然有序，增量扫描高效 2. **双层保障机制** - Cursor：正常流程，快速处理 - Retry：异常流程，可靠重试 - 职责分离，监控清晰 3. **可空 IP 字段支持** - ClientIP 和 ServerIP 使用 *string 类型 - 支持 NULL 值，符合数据库最佳实践 - 使用 sql.NullString 正确处理 4. **完整的监控支持** - 未存证记录数监控 - Cursor 延迟监控 - 重试队列长度监控 - 死信队列监控 ## 测试结果 - ✅ 单元测试：49/49 通过 (100%) - ✅ 代码覆盖率：28.5% - ✅ 编译状态：无错误 - ✅ 支持数据库：PostgreSQL, MySQL, SQLite ## Breaking Changes 无破坏性变更。Persistence 模块作为可选功能，不影响现有代码。 ## 版本信息 - 版本：v2.1.0 - Go 版本要求：1.21+ - 更新日期：2025-12-23
This commit is contained in:
ryan
394
api/persistence/client.go
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394
api/persistence/client.go
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package persistence
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import (
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"context"
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"errors"
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"fmt"
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"github.com/ThreeDotsLabs/watermill/message"
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"go.yandata.net/iod/iod/go-trustlog/api/adapter"
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"go.yandata.net/iod/iod/go-trustlog/api/logger"
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"go.yandata.net/iod/iod/go-trustlog/api/model"
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)
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// operationPublisherAdapter 适配器，将 PersistenceClient 的 publishToTrustlog 方法适配为 OperationPublisher 接口
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type operationPublisherAdapter struct {
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client *PersistenceClient
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}
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func (a *operationPublisherAdapter) Publish(ctx context.Context, op *model.Operation) error {
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return a.client.publishToTrustlog(ctx, op)
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}
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// PersistenceClient 支持数据库持久化的存证客户端
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// 在原有 HighClient 功能基础上，增加了数据库持久化支持
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type PersistenceClient struct {
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publisher message.Publisher
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logger logger.Logger
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envelopeConfig model.EnvelopeConfig
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manager *PersistenceManager
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cursorWorker *CursorWorker
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retryWorker *RetryWorker
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}
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// PersistenceClientConfig 客户端配置
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type PersistenceClientConfig struct {
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// Publisher 消息发布器（用于存证）
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Publisher message.Publisher
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// Logger 日志记录器
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Logger logger.Logger
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// EnvelopeConfig SM2密钥配置（用于签名和序列化）
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EnvelopeConfig model.EnvelopeConfig
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// DBConfig 数据库配置
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DBConfig DBConfig
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// PersistenceConfig 持久化策略配置
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PersistenceConfig PersistenceConfig
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// CursorWorkerConfig Cursor工作器配置（可选）
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CursorWorkerConfig *CursorWorkerConfig
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// EnableCursorWorker 是否启用Cursor工作器（仅对 StrategyDBAndTrustlog 有效）
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EnableCursorWorker bool
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// RetryWorkerConfig 重试工作器配置（可选）
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RetryWorkerConfig *RetryWorkerConfig
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// EnableRetryWorker 是否启用重试工作器（仅对 StrategyDBAndTrustlog 有效）
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EnableRetryWorker bool
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}
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// NewPersistenceClient 创建支持数据库持久化的存证客户端
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func NewPersistenceClient(ctx context.Context, config PersistenceClientConfig) (*PersistenceClient, error) {
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if config.Logger == nil {
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return nil, errors.New("logger is required")
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}
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// 创建数据库连接
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db, err := NewDB(config.DBConfig)
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if err != nil {
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config.Logger.ErrorContext(ctx, "failed to create database connection",
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"error", err,
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)
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return nil, fmt.Errorf("failed to create database connection: %w", err)
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}
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// 创建持久化管理器
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manager := NewPersistenceManager(db, config.PersistenceConfig, config.Logger)
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// 初始化数据库表结构
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if err := manager.InitSchema(ctx, config.DBConfig.DriverName); err != nil {
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db.Close()
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return nil, fmt.Errorf("failed to initialize database schema: %w", err)
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}
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client := &PersistenceClient{
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publisher: config.Publisher,
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logger: config.Logger,
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envelopeConfig: config.EnvelopeConfig,
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manager: manager,
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}
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// 创建 Operation Publisher 适配器（将 PersistenceClient 的 publishToTrustlog 方法适配为 OperationPublisher 接口）
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opPublisher := &operationPublisherAdapter{
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client: client,
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}
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manager.SetPublisher(opPublisher)
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// 如果启用Cursor工作器且策略为 StrategyDBAndTrustlog
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if config.EnableCursorWorker && config.PersistenceConfig.Strategy == StrategyDBAndTrustlog {
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var workerConfig CursorWorkerConfig
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if config.CursorWorkerConfig != nil {
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workerConfig = *config.CursorWorkerConfig
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} else {
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workerConfig = DefaultCursorWorkerConfig()
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}
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client.cursorWorker = NewCursorWorker(workerConfig, manager)
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if err := client.cursorWorker.Start(ctx); err != nil {
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db.Close()
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return nil, fmt.Errorf("failed to start cursor worker: %w", err)
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}
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config.Logger.InfoContext(ctx, "cursor worker started",
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"strategy", config.PersistenceConfig.Strategy.String(),
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"scanInterval", workerConfig.ScanInterval,
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)
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}
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// 如果启用重试工作器且策略为 StrategyDBAndTrustlog
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if config.EnableRetryWorker && config.PersistenceConfig.Strategy == StrategyDBAndTrustlog {
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var workerConfig RetryWorkerConfig
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if config.RetryWorkerConfig != nil {
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workerConfig = *config.RetryWorkerConfig
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} else {
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workerConfig = DefaultRetryWorkerConfig()
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}
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client.retryWorker = NewRetryWorker(workerConfig, manager, config.Publisher, config.Logger)
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go client.retryWorker.Start(ctx)
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config.Logger.InfoContext(ctx, "retry worker started",
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"strategy", config.PersistenceConfig.Strategy.String(),
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"retryInterval", workerConfig.RetryInterval,
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)
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}
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config.Logger.InfoContext(ctx, "persistence client created",
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"strategy", config.PersistenceConfig.Strategy.String(),
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"cursorEnabled", config.EnableCursorWorker,
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"retryEnabled", config.EnableRetryWorker,
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)
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return client, nil
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}
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// OperationPublish 发布操作记录
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// 根据配置的策略，选择仅落库、既落库又存证或仅存证
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func (c *PersistenceClient) OperationPublish(ctx context.Context, operation *model.Operation) error {
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if operation == nil {
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c.logger.ErrorContext(ctx, "operation publish failed: operation is nil")
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return errors.New("operation cannot be nil")
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}
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c.logger.DebugContext(ctx, "publishing operation with persistence",
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"opID", operation.OpID,
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"opType", operation.OpType,
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"strategy", c.manager.config.Strategy.String(),
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)
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strategy := c.manager.config.Strategy
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switch strategy {
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case StrategyDBOnly:
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// 仅落库
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return c.publishDBOnly(ctx, operation)
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case StrategyDBAndTrustlog:
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// 既落库又存证
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return c.publishDBAndTrustlog(ctx, operation)
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case StrategyTrustlogOnly:
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// 仅存证
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return c.publishTrustlogOnly(ctx, operation)
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default:
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return fmt.Errorf("unknown persistence strategy: %s", strategy.String())
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}
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}
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// publishDBOnly 仅落库策略
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func (c *PersistenceClient) publishDBOnly(ctx context.Context, operation *model.Operation) error {
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c.logger.DebugContext(ctx, "publishing operation with DB_ONLY strategy",
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"opID", operation.OpID,
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)
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// 保存到数据库
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if err := c.manager.SaveOperation(ctx, operation); err != nil {
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c.logger.ErrorContext(ctx, "failed to save operation to database",
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"opID", operation.OpID,
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"error", err,
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)
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return err
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}
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c.logger.InfoContext(ctx, "operation saved with DB_ONLY strategy",
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"opID", operation.OpID,
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)
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return nil
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}
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// publishDBAndTrustlog 既落库又存证策略
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func (c *PersistenceClient) publishDBAndTrustlog(ctx context.Context, operation *model.Operation) error {
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c.logger.DebugContext(ctx, "publishing operation with DB_AND_TRUSTLOG strategy",
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"opID", operation.OpID,
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)
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// 先保存到数据库（状态为未存证）
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if err := c.manager.SaveOperation(ctx, operation); err != nil {
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c.logger.ErrorContext(ctx, "failed to save operation to database",
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"opID", operation.OpID,
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"error", err,
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)
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return err
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}
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// 尝试发布到存证系统
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if err := c.publishToTrustlog(ctx, operation); err != nil {
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c.logger.WarnContext(ctx, "failed to publish to trustlog, will retry later",
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"opID", operation.OpID,
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"error", err,
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)
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// 发布失败，但数据库已保存，重试工作器会处理
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return nil
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}
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// 发布成功，更新状态为已存证
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if err := c.manager.GetOperationRepo().UpdateStatus(ctx, operation.OpID, StatusTrustlogged); err != nil {
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c.logger.ErrorContext(ctx, "failed to update operation status",
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"opID", operation.OpID,
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"error", err,
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)
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// 状态更新失败，但消息已发送，重试工作器会清理
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}
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// 删除重试记录（如果存在）
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c.manager.GetRetryRepo().DeleteRetry(ctx, operation.OpID)
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c.logger.InfoContext(ctx, "operation published with DB_AND_TRUSTLOG strategy",
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"opID", operation.OpID,
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)
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return nil
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}
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// publishTrustlogOnly 仅存证策略
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func (c *PersistenceClient) publishTrustlogOnly(ctx context.Context, operation *model.Operation) error {
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c.logger.DebugContext(ctx, "publishing operation with TRUSTLOG_ONLY strategy",
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"opID", operation.OpID,
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)
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// 直接发布到存证系统
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if err := c.publishToTrustlog(ctx, operation); err != nil {
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c.logger.ErrorContext(ctx, "failed to publish to trustlog",
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"opID", operation.OpID,
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"error", err,
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)
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return err
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}
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c.logger.InfoContext(ctx, "operation published with TRUSTLOG_ONLY strategy",
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"opID", operation.OpID,
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)
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return nil
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}
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// publishToTrustlog 发布到存证系统（使用 Envelope 格式）
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func (c *PersistenceClient) publishToTrustlog(ctx context.Context, operation *model.Operation) error {
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messageKey := operation.Key()
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c.logger.DebugContext(ctx, "starting envelope serialization",
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"messageKey", messageKey,
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)
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// 使用 Envelope 序列化
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envelopeData, err := model.MarshalTrustlog(operation, c.envelopeConfig)
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if err != nil {
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c.logger.ErrorContext(ctx, "envelope serialization failed",
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"messageKey", messageKey,
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"error", err,
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)
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return fmt.Errorf("failed to marshal envelope: %w", err)
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}
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c.logger.DebugContext(ctx, "envelope serialized successfully",
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"messageKey", messageKey,
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"envelopeSize", len(envelopeData),
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)
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msg := message.NewMessage(messageKey, envelopeData)
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c.logger.DebugContext(ctx, "publishing message to topic",
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"messageKey", messageKey,
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"topic", adapter.OperationTopic,
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)
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if publishErr := c.publisher.Publish(adapter.OperationTopic, msg); publishErr != nil {
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c.logger.ErrorContext(ctx, "failed to publish to topic",
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"messageKey", messageKey,
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"topic", adapter.OperationTopic,
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"error", publishErr,
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)
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return fmt.Errorf("failed to publish message to topic %s: %w", adapter.OperationTopic, publishErr)
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}
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c.logger.DebugContext(ctx, "message published to topic successfully",
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"messageKey", messageKey,
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"topic", adapter.OperationTopic,
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)
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return nil
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}
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// RecordPublish 发布记录（Record 类型不支持数据库持久化）
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func (c *PersistenceClient) RecordPublish(ctx context.Context, record *model.Record) error {
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if record == nil {
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c.logger.ErrorContext(ctx, "record publish failed: record is nil")
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return errors.New("record cannot be nil")
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}
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c.logger.DebugContext(ctx, "publishing record",
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"recordID", record.ID,
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"rcType", record.RCType,
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)
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// Record 类型直接发布到存证系统，不落库
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messageKey := record.Key()
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envelopeData, err := model.MarshalTrustlog(record, c.envelopeConfig)
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if err != nil {
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c.logger.ErrorContext(ctx, "envelope serialization failed",
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"recordID", record.ID,
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"error", err,
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)
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return fmt.Errorf("failed to marshal envelope: %w", err)
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}
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msg := message.NewMessage(messageKey, envelopeData)
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if publishErr := c.publisher.Publish(adapter.RecordTopic, msg); publishErr != nil {
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c.logger.ErrorContext(ctx, "failed to publish record to topic",
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"recordID", record.ID,
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"error", publishErr,
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)
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return fmt.Errorf("failed to publish record to topic %s: %w", adapter.RecordTopic, publishErr)
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}
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c.logger.InfoContext(ctx, "record published successfully",
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"recordID", record.ID,
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"rcType", record.RCType,
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)
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return nil
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}
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// GetLow 获取底层 Publisher
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func (c *PersistenceClient) GetLow() message.Publisher {
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return c.publisher
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}
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// GetManager 获取持久化管理器
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func (c *PersistenceClient) GetManager() *PersistenceManager {
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return c.manager
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}
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// Close 关闭客户端
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func (c *PersistenceClient) Close() error {
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ctx := context.Background()
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c.logger.Info("closing persistence client")
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// 停止Cursor工作器
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if c.cursorWorker != nil {
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if err := c.cursorWorker.Stop(ctx); err != nil {
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c.logger.Error("failed to stop cursor worker",
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"error", err,
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)
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}
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}
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// 停止重试工作器
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if c.retryWorker != nil {
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c.retryWorker.Stop()
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}
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// 关闭数据库连接
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if err := c.manager.Close(); err != nil {
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c.logger.Error("failed to close database",
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"error", err,
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)
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return err
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}
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// 关闭 Publisher
|
||||
if err := c.publisher.Close(); err != nil {
|
||||
c.logger.Error("failed to close publisher",
|
||||
"error", err,
|
||||
)
|
||||
return err
|
||||
}
|
||||
|
||||
c.logger.Info("persistence client closed successfully")
|
||||
return nil
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user