October 2021
Beginner to intermediate
250 pages
7h 11m
Chinese
Content preview from 微服务与事件驱动架构
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214
｜
第
15
章
•
测试中的系统没有得到必要的隔离。例如，同时运行大规模性能测试的服务会影响
彼此的结果。
•
不兼容的事件可能会生成到其他服务的输入事件流中。
•
事件流数据不可避免地变得过时，必须用较新的事件更新。
•
不能准确地表示在生产环境中出现的事件的范围。
就可用性而言，这种策略是最糟糕的选择，因为事件代理最终会成为混乱的
事件流和损坏的数据的垃圾场。
在使用这种方案时，要做到与其他应用程序测试隔离是很难的，特别是当一个微服务的输
出流是另一个微服务的输入流时。谨慎管理的数据流、严格的命名约定以及对写入事件流
的限制有助于缓解这些缺点，但环境维护人员和用户需要勤勉工作并遵守纪律。
15.7.3
使用生产环境进行测试
你也可以在生产环境中测试微服务。微服务可以运转起来、从输入事件流中消费、应用业
务逻辑并产生输出。最常见的方法是让微服务使用自己指定的输出事件流和状态存储，这
样就不会影响现有的生产系统。当一个微服务的旧版本与测试中的新版本同时运行时，这
一点尤为重要。
优点
•
你能完全访问生产事件。
•
其利用生产环境的安全模型来确保遵循正确的访问协议。
•
非常适用于应用程序的冒烟测试。
•
不需要维护单独的测试环境。
缺点
•
有影响生产环境功能的风险，特别是当负载很高时。不适用于负载和性能测试。
•
必须仔细清除在测试期间创建的资源，比如事件流、消费者组、访问控制权限和状
态存储。这类似于共享临时环境方案的要求。
•
需要工具支持来保证处于测试中的微服务和事件流与“真正的生产”微服务隔离，
特别是当要执行长期测试时。这包括用于管理和部署微服务的资源，因为生产环境 ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.