Event-Driven Integration Architecture(事件驱动集成架构)
知识库位置:
FDE Knowledge Base/04 Architecture/Patterns/09-Event-Driven-Integration-Architecture.md
Architecture Metadata(架构元数据)
Section titled “Architecture Metadata(架构元数据)”Architecture ID: ARCH-009
Category(类别):Integration(集成)
Primary Business Problem(主要业务问题):Multiple Systems Collaborating Around Business Events(多系统围绕业务事件协作)
Complexity(复杂度):Medium-High(中高)
AI Dependency(AI 依赖度):Low(低)
Data Dependency(数据依赖度):Medium(中)
Integration Complexity(集成复杂度):High(高)
Human Review(人工复核):Not needed(不需要)
Status: CoreVersion: v0.2Business Problem(业务问题)
Section titled “Business Problem(业务问题)”多个企业系统需要围绕业务事件协作。
例如:
OrderCreated(订单已创建)CustomerUpdated(客户已更新)PaymentCompleted(支付已完成)TicketEscalated(工单已升级)如果每个系统都互相调用 API(应用程序编程接口),会形成复杂耦合。
Architecture(架构)
Section titled “Architecture(架构)” Producer(生产者) │ ↓ Event Bus(事件总线) ┌──────┼──────┐ ↓ ↓ ↓ Consumer A Consumer B Consumer C (消费者A)(消费者B)(消费者C) ↓ ↓ ↓ CRM Billing AnalyticsBenefits(收益)
Section titled “Benefits(收益)”- Loose Coupling(松耦合)
- Async Processing(异步处理)
- Multiple Consumers(多消费者)
- Better Extensibility(更好的可扩展性)
Costs(代价)
Section titled “Costs(代价)”引入:
- Eventual Consistency(最终一致性)
- Debugging Complexity(调试复杂度)
- Ordering Issues(顺序问题)
- Duplicate Events(事件重复)
- Schema Evolution(结构演进)
Event Design(事件设计)
Section titled “Event Design(事件设计)”事件应该表达:
Something happened.(某事已发生。)
例如:
OrderCreated(订单已创建)而不是:
PleaseUpdateCRM(请更新 CRM)前者是业务事实(Fact,事实)。
后者是命令(Command,命令)。
Event Envelope(事件信封)
Section titled “Event Envelope(事件信封)”建议至少包含:
event_id(事件编号)event_type(事件类型)timestamp(时间戳)source(来源)version(版本)correlation_id(关联编号)payload(载荷)Schema Evolution(结构演进)
Section titled “Schema Evolution(结构演进)”事件长期存在,所以要考虑:
- Backward Compatibility(向后兼容)
- Versioning(版本管理)
- Consumer Migration(消费者迁移)
Reliability(可靠性)
Section titled “Reliability(可靠性)”推荐:
Producer(生产者)↓Durable Event(持久化事件)↓Consumer(消费者)↓Idempotent Processing(幂等处理)Failure Modes(失败模式)
Section titled “Failure Modes(失败模式)”- Duplicate Events(事件重复)
- Consumer Unavailable(消费者不可用)
- Schema Mismatch(结构不匹配)
- Poison Message(毒消息)
- Ordering Problem(顺序问题)
- Unknown Event Version(未知事件版本)