@RibbonClient和@LoadBalanced之间的区别

问题描述

我了解@LoadBalanced表示Rest模板应该基于使用Ribbon的客户端负载平衡，并检查Eureka服务器是否将服务名称解析为主机/端口.

I understand @LoadBalanced indicates the Rest template should be based on Client Side Load Balancing using Ribbon and checks Eureka server for resolving the service name to host/port.

@RibbonClient的用途是什么.

推荐答案

TL; DR :@LoadBalanced是标记注释& @RibbonClient用于配置.

TL;DR: @LoadBalanced is a marker annotation & @RibbonClient is used for configuration purposes.

用作标记注释，指示带注释的RestTemplate应该使用RibbonLoadBalancerClient与您的服务进行交互.

Used as a marker annotation indicating that the annotated RestTemplate should use a RibbonLoadBalancerClient for interacting with your service(s).

这又使您可以对传递给RestTemplate的URL使用逻辑标识符".这些逻辑标识符通常是服务的名称.例如:

In turn, this allows you to use "logical identifiers" for the URLs you pass to the RestTemplate. These logical identifiers are typically the name of a service. For example:

restTemplate.getForObject("http://some-service-name/user/{id}", String.class, 1);

其中some-service-name是逻辑标识符.

用于配置功能区客户端.

Used for configuring your Ribbon client(s).

需要@RibbonClient吗?

不！如果您正在使用服务发现，并且对所有默认的功能区设置都没问题，那么甚至不需要使用@RibbonClient批注.

No! If you're using Service Discovery and you're ok with all of the default Ribbon settings, you don't even need to use the @RibbonClient annotation.

我什么时候应该使用@RibbonClient?

When should I use @RibbonClient?

至少有两种情况需要使用@RibbonClient

There are at least two cases where you need to use @RibbonClient

1. 您需要为特定的Ribbon用户端自定义功能区设置
2. 您没有使用任何服务发现

自定义功能区设置:

Customizing your Ribbon settings:

定义一个@RibbonClient

@RibbonClient(name = "some-service", configuration = SomeServiceConfig.class)

• name-将其设置为与功能区调用的服务相同的名称，但需要其他自定义功能区以与功能区进行交互.
• configuration-将其所有自定义定义为@Beans的类设置为@Configuration类.确保@ComponentScan没有选择该类 ，否则它将覆盖所有Ribbon功能区客户端的默认设置.
• name - set it to the same name of the service you're calling with Ribbon but need additional customizations for how Ribbon interacts with that service.
• configuration - set it to an @Configuration class with all of your customizations defined as @Beans. Make sure this class is not picked up by @ComponentScan otherwise it will override the defaults for ALL Ribbon clients.

请参阅Spring Cloud Netflix文档中的自定义RibbonClient"部分(链接)

See the section "Customizing the RibbonClient` in the Spring Cloud Netflix documentation (link)

使用没有服务发现的功能区

Using Ribbon without Service Discovery

如果您不使用服务发现，则@RibbonClient批注的name字段将用于在application.properties中为您的配置加上前缀，并在您传递给.

If you're not using Service Discovery, the name field of the @RibbonClient annotation will be used to prefix your configuration in the application.properties as well as "logical identifier" in the URL you pass to RestTemplate.

定义@RibbonClient

@RibbonClient(name = "myservice")

然后在您的application.properties

myservice.ribbon.eureka.enabled=false
myservice.ribbon.listOfServers=http://localhost:5000, http://localhost:5001

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