# The Servo Book API docs Servo is a web browser engine written in the Rust programming language, and currently developed on 64-bit Linux, 64-bit macOS, 64-bit Windows, and Android. Work is still ongoing to make Servo consumable as a webview library. Currently, the recommended way to run Servo as a browser is via servoshell, our winit and egui-based demo browser. If you'd like to embed Servo in your runtime, or servo-gtk, a GTK4-based web browser widget. Servo, the embeddable, independent, memory-safe, modular, parallel web rendering engine -... back forward https://servo.org/ go servo ![Image

ents/d/a/b/d/dabd03cad1616130b3699e4318980488/p6_2.jpg) ## 开源领域的Metrics实现 Netflix Servo : https://github.com/Netflix/servo Dropwizard Metrics: https://github.com/dropwizard/metrics Spring Boot Actuator: com/spring-projects/spring-boot/tree/master/spring-boot-project/spring-boot-actuator ## 开源领域的Metrics比较 |比较项|Netflix Servo|Dropwizard Metrics|Spring Boot Actuator| |---|---|---|---| |计数器（Monitor）的实现|性能相对高效|功能相对丰富|较弱，但是支持使用Dropwizard 置以及管理功能的微服务框架，因此我们决定提供内置的更强大的Metrics功能： - 开箱即用，不写一行代码输出关键Metrics，全面覆盖调用数、TPS、Latency等； • 基于Netflix Servo，使用固定统计周期（稍后会详细介绍）； - 多维度统计，帮助用户抽丝剥茧快速定位问题，支持的维度包括： • 微服务实例（Instance）级和操作（Operation）级； • 操作

Cloud Function Spring Cloud Gateway Spring Cloud GCP Spring Cloud Kubernetes Spring Cloud Netflix Spring Cloud Open Service Broker Spring Cloud OpenFeign Spring Cloud Pipelines Spring Cloud json-path:2.2.0 Maven: com.netflix.eureka:eureka-client:1.4.12 Maven: com.netflix.eureka:eureka-core:1.4.12 Maven: com.netflix.governator.governator:1.12.10 Maven: com.netflix.governator.governator-api:1 com.netflix.governator.governator-core:1.12.10 Maven: com.netflix.hystrix.hystrix-core:1.5.6 Maven: com.netflix.netflix-commons.netflix-commons-util:0.1.1 Maven: com.netflix.netflix-commons:netflix-eventbus:0

根据实际调用统计，隔离暂时不可用的调用目标 • 开发人员通过SPI扩展过滤功能 2. 以过滤得到的Endpoint集合作为输入，根据配置的策略进行LoadBalance: • 轮询、响应时间权重、随机 - 基于Netflix ribbon，开发人员可以根据需要自定义IRule的实现 ![Image](/uploads/documents/0/8/9/1/0891f253abde05684f034c0845a850db/p7_2 根据自定义规则获取目标微服务名、版本规则、新url等等参数 - 通过Edge Invocation转发请求 • 自己不能处理的url，放通给其他dispatcher处理 ## Metrics-架构 • 基于netflix spectator - Foundation-metrics通过SPI机制加载所有MetricsInitializer实现，实现者可以通过MetricsInitializer中的getOrd 字越小，越先执行。 • Metrics-core实现3类MetricsInitializer: DefaultRegistryInitializer：实例化并注册spectator-reg-servo，设置较小的order，保证比下面2类MetricsInitializer先执行 — Meters Initializer：实现TPS、时延、线程池、JVM资源等等数据的统计 — Publis

[](std::uint_8 id) { 4 serial.send(servo_temp_request_t{"id" _f = id}); 5 }, 0x01) 6 | msg::then_receive("recv_temp", servo_temp_read_t)( 7 &](auto [(std::uint_8 id) { 4 serial.send(servo_temp_request_t{"id" _f = id}); 5 }, 0x01) 6 | msg::then_receive("recv_temp", servo_temp_read_t)( 7 &](auto [(std::uint_8 id) { 4 serial.send(servo_temp_request_t{"id"_f = id}); 5 }, 0x01) 6 | msg::then_receive("recv_temp", servo_temp_read_t)( 7 &](auto msg) { return

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0 码力 | 25 页 | 4.60 MB | 2 年前

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to make it work reasonably when you’re alternating multi-character strings. Crow | Servo will match either Crow or Servo, not Cro, a 'w' or an 'S', and ervo. 要匹配字面 ' | '，请使用 \ |

to make it work reasonably when you’re alternating multi-character strings. Crow | Servo will match either Crow or Servo, not Cro, a 'w' or an 'S', and ervo. 要匹配字面 ' | '，请使用 \ |

to make it work reasonably when you’re alternating multi-character strings. Crow | Servo will match either Crow or Servo, not Cro, a 'w' or an 'S', and ervo. 要匹配字面 ' | '，请使用 \ |

运算符。如果 A 和 B 是正则表达式，A|B 将匹配任何与 A 或 B 匹配的字符串。| 具有非常低的优先级，以便在交替使用多字符串时使其合理地工作。Crow|Servo 将匹配 'Crow' 或 'Servo'，而不是 'Cro'、'w' 或 'S' 和 'ervo'。 要匹配字面 ' |