springcloud alibaba 服务降级

Spring Cloud Alibaba提供了服务降级的功能。服务降级是指在系统出现异常或者超时的情况下，通过限制某些功能的使用来保证整体系统的稳定性和可用性。Spring Cloud Alibaba默认支持WebServlet、WebFlux, OpenFeign、RestTemplate、Spring Cloud Gateway, Zuul, Dubbo和RocketMQ等组件的服务降级功能。用户可以通过控制台实时修改限流降级规则，并支持查看限流降级的Metrics监控。这样可以在系统负载增加时，通过限制某些请求的访问量或者关闭某些功能来保证系统的稳定性。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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