SpringCloud @RefreshScope

布满荆棘的人生 2022-06-11 01:18 173阅读 0赞

@RefreshScope

> A Scope implementation that allows for beans to be refreshed dynamically at runtime (see refresh(String) and refreshAll()). If a bean is refreshed then the next time the bean is accessed (i.e. a method is executed) a new instance is created.

### 微服务客户端配置自动更新，添加spring-boot-starter-actuator，启动项目之后，会看到如下信息： ###

2017-07-27 08:59:20.682  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/resume || /admin/resume.json],methods=[POST]}" onto public java.lang.Object org.springframework.cloud.endpoint.GenericPostableMvcEndpoint.invoke()
    2017-07-27 08:59:20.682  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/restart || /admin/restart.json],methods=[POST]}" onto public java.lang.Object org.springframework.cloud.context.restart.RestartMvcEndpoint.invoke()
    2017-07-27 08:59:20.684  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/metrics/{name:.*}],methods=[GET],produces=[application/vnd.spring-boot.actuator.v1+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.MetricsMvcEndpoint.value(java.lang.String)
    2017-07-27 08:59:20.685  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/metrics || /admin/metrics.json],methods=[GET],produces=[application/vnd.spring-boot.actuator.v1+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
    2017-07-27 08:59:20.686  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/trace || /admin/trace.json],methods=[GET],produces=[application/vnd.spring-boot.actuator.v1+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
    2017-07-27 08:59:20.687  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/dump || /admin/dump.json],methods=[GET],produces=[application/vnd.spring-boot.actuator.v1+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
    2017-07-27 08:59:20.688  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/env],methods=[POST]}" onto public java.lang.Object org.springframework.cloud.context.environment.EnvironmentManagerMvcEndpoint.value(java.util.Map<java.lang.String, java.lang.String>)
    2017-07-27 08:59:20.688  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/env/reset],methods=[POST]}" onto public java.util.Map<java.lang.String, java.lang.Object> org.springframework.cloud.context.environment.EnvironmentManagerMvcEndpoint.reset()
    2017-07-27 08:59:20.688  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/info || /admin/info.json],methods=[GET],produces=[application/vnd.spring-boot.actuator.v1+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
    2017-07-27 08:59:20.689  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/configprops || /admin/configprops.json],methods=[GET],produces=[application/vnd.spring-boot.actuator.v1+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
    2017-07-27 08:59:20.689  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/archaius || /admin/archaius.json],methods=[GET],produces=[application/vnd.spring-boot.actuator.v1+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
    2017-07-27 08:59:20.694  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/env/{name:.*}],methods=[GET],produces=[application/vnd.spring-boot.actuator.v1+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EnvironmentMvcEndpoint.value(java.lang.String)
    2017-07-27 08:59:20.694  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/env || /admin/env.json],methods=[GET],produces=[application/vnd.spring-boot.actuator.v1+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
    2017-07-27 08:59:20.695  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/refresh || /admin/refresh.json],methods=[POST]}" onto public java.lang.Object org.springframework.cloud.endpoint.GenericPostableMvcEndpoint.invoke()
    2017-07-27 08:59:20.700  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/loggers/{name:.*}],methods=[GET],produces=[application/vnd.spring-boot.actuator.v1+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.LoggersMvcEndpoint.get(java.lang.String)
    2017-07-27 08:59:20.701  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/loggers/{name:.*}],methods=[POST],consumes=[application/vnd.spring-boot.actuator.v1+json || application/json],produces=[application/vnd.spring-boot.actuator.v1+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.LoggersMvcEndpoint.set(java.lang.String,java.util.Map<java.lang.String, java.lang.String>)
    2017-07-27 08:59:20.702  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/loggers || /admin/loggers.json],methods=[GET],produces=[application/vnd.spring-boot.actuator.v1+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
    2017-07-27 08:59:20.704  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/autoconfig || /admin/autoconfig.json],methods=[GET],produces=[application/vnd.spring-boot.actuator.v1+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
    2017-07-27 08:59:20.705  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/heapdump || /admin/heapdump.json],methods=[GET],produces=[application/octet-stream]}" onto public void org.springframework.boot.actuate.endpoint.mvc.HeapdumpMvcEndpoint.invoke(boolean,javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse) throws java.io.IOException,javax.servlet.ServletException
    2017-07-27 08:59:20.706  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/health || /admin/health.json],methods=[GET],produces=[application/vnd.spring-boot.actuator.v1+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.HealthMvcEndpoint.invoke(javax.servlet.http.HttpServletRequest,java.security.Principal)
    2017-07-27 08:59:20.709  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/pause || /admin/pause.json],methods=[POST]}" onto public java.lang.Object org.springframework.cloud.endpoint.GenericPostableMvcEndpoint.invoke()
    2017-07-27 08:59:20.710  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/auditevents || /admin/auditevents.json],methods=[GET],produces=[application/vnd.spring-boot.actuator.v1+json || application/json]}" onto public org.springframework.http.ResponseEntity<?> org.springframework.boot.actuate.endpoint.mvc.AuditEventsMvcEndpoint.findByPrincipalAndAfterAndType(java.lang.String,java.util.Date,java.lang.String)
    2017-07-27 08:59:20.711  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/features || /admin/features.json],methods=[GET],produces=[application/vnd.spring-boot.actuator.v1+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
    2017-07-27 08:59:20.712  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/mappings || /admin/mappings.json],methods=[GET],produces=[application/vnd.spring-boot.actuator.v1+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()
    2017-07-27 08:59:20.714  INFO 5436 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/admin/beans || /admin/beans.json],methods=[GET],produces=[application/vnd.spring-boot.actuator.v1+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke()

### 这些都是Actuator暴露的功能，单个微服务通过ConfigServer获取Git Repository相关配置，可利用Actuator暴露的refresh接口来实现配置的动态更新，客户端management配置，security.enabled = false，post请求时不会报HTTP（401），未授权。 ###

server:
      port: 8889
    management:
      context-path: /admin
      security:
        enabled: false

### 当修改配置之后，向refresh接口发送Post请求，得到反馈如下，配置更新： ###

![这里写图片描述][SouthEast]

### 前后配置对比 ###

![Image 1][]

[SouthEast]: /images/20220611/f6bfb90f5d3e4aed855d08efa67f582e.png
[Image 1]: