Java类注释生成专家

/**

• Repository adapter that bridges the Order aggregate and JPA persistence.
• Responsibilities:
• • Maps the domain aggregate {@code Order} to the JPA entity {@code OrderEntity}.
• • Persists and updates data via Spring Data JPA with transactional boundaries.
• • Enforces optimistic locking and supports soft delete semantics.
• • Supports specification-based search along with pagination and sorting.
• • Caches hot read paths using Spring Cache (caches: {@code orderById}, {@code orderByBizId}).
• Consistency and concurrency:
• • Write operations are executed within transactions to ensure atomic save/update.
• • Optimistic locking prevents lost updates when concurrent modifications occur.
• • Read operations exclude soft-deleted records.
• Key operations:
• • {@code save(Order)}: Persist or update an Order aggregate, mapping to {@code OrderEntity} and ensuring transactional consistency.
• • {@code findById(UUID)}: Retrieve an Order by its technical identifier; leverages cache {@code orderById} for hot reads.
• • {@code findByBusinessId(String)}: Retrieve an Order by its business identifier; leverages cache {@code orderByBizId}.
• • {@code search(OrderSpec, PageReq)}: Execute specification-based queries with pagination and sorting; returns a paged result.
• Usage example:

• {@code
  

• Optional order = repo.findByBusinessId("O2024-0001");
• order.ifPresent(o -> {

• // handle the Order aggregate
  

• });
• }
• @version 1.0
• @since 1.0
• @see Order
• @see OrderEntity
• @see org.springframework.data.domain.Page
• @see org.springframework.data.domain.Pageable
• @see org.springframework.data.jpa.domain.Specification
• @see org.springframework.cache.annotation.Cacheable
• @see java.util.UUID
• @see java.util.Optional */

/**

• 通用重试执行器工具类。用于安全地调用可能瞬时失败的外部接口或不稳定逻辑，
• 在可控范围内自动重试并配合降级与断路器保障整体可用性。
• 功能特性：
• • 回退策略：支持固定间隔、指数回退、抖动（Jitter）
• • 重试边界：可配置最大重试次数与总超时
• • 失败降级：支持设置失败后的降级函数（Fallback）
• • 简易断路器：支持打开（Open）、半开（Half-Open）、关闭（Closed）
• • 幂等保障：通过业务键避免重复提交，确保请求幂等性
• 主要方法：
• • {@link #execute(java.util.function.Supplier, RetryPolicy)} 同步执行，按策略重试，返回业务结果
• • {@link #withFallback(java.util.function.Function)} 配置降级函数，在重试耗尽或断路器打开时提供兜底结果
• • {@code executeAsync(...)} 异步执行版本（例如返回 {@link java.util.concurrent.CompletableFuture}），适用于非阻塞场景
• 使用示例：

• {@code
  

• // 目标场景：调用地址标准化第三方 API，网络 5xx 时按策略自动重试并记录指标
• RetryPolicy policy = ...; // 配置固定/指数/抖动回退、最大重试次数、总超时等
• RetryExecutor executor = ...; // 通过业务键获取/创建执行器，用于幂等防重
• String normalized = executor

• .withFallback(ex -> {
  

•     Metrics.counter("addr.normalize.fallback").increment(); // 记录指标
  

•     return rawAddr; // 简单降级：返回原始地址或本地兜底
  

• })
  

• .execute(() -> thirdParty.normalize(rawAddr), policy);
  

• // 异步方式（如需）
• // CompletableFuture future =
• // executor.executeAsync(() -> thirdParty.normalize(rawAddr), policy);
• }
• 注意：
• • 本工具适用于瞬时性失败（如网络抖动、服务短暂不可用）；对确定性业务错误应直接失败而非重试
• • 业务键应具备可判定唯一性，合理设置过期策略以避免误判重复提交
• 相关链接：
• @see RetryPolicy
• @see java.util.function.Supplier
• @see java.util.function.Function
• @see java.util.concurrent.CompletableFuture
• 作者：
• @author 开发者
• @version 1.0.0
• @since 1.0 */