英文:
Why is the bean 'reactorServiceInstanceLoadBalancer' instantiated just when the method 'getInstance' is called?
问题
我尝试通过实现 ReactorServiceInstanceLoadBalancer 接口来定义一个自定义的负载均衡器，以替换由 RoundRobinLoadBalancer 定义的默认负载均衡器。
但是它并没有生效。
我发现在应用程序启动时，并没有实例化在类 'LoadBalancerClientConfiguration' 中定义的原始 bean，而是在调用 'LoadBalancerClientFactory.getInstance' 时实例化，构造函数使用了一个 StandardEnvironment 的 bean 进行自动装配，然而在我的配置中定义的 bean 则是在应用程序启动时实例化，使用了一个 StandardReactiveWebEnvironment 的 bean 进行自动装配。
非常困惑！
我的英文不是很好。感谢您阅读完整的描述！
以下是我的代码：
@Slf4j
public class CustomLoadBalancer implements ReactorServiceInstanceLoadBalancer {
// ...细节被省略
}
@Configuration(proxyBeanMethods = false)
@ConditionalOnDiscoveryEnabled
public class CustomLoadBalancerClientConfiguration {
@Bean
public ReactorLoadBalancer<ServiceInstance> reactorServiceInstanceLoadBalancer(Environment environment, LoadBalancerClientFactory loadBalancerClientFactory, ServiceInstanceChooser serviceInstanceChooser) {
String name = loadBalancerClientFactory.getName(environment);
return new CustomLoadBalancer(serviceInstanceChooser, loadBalancerClientFactory.getLazyProvider(name, ServiceInstanceListSupplier.class), name);
}
}
英文:
Im trying to define a custom LoadBalancer by implementation the interface ReactorServiceInstanceLoadBalancer to replace the default load balancer defined by RoundRobinLoadBalancer.
But it doesn't work.
I found that the original bean defined in class 'LoadBalancerClientConfiguration' isn't instantiated when the application startup,but instantiated when 'LoadBalancerClientFactory.getInstance' is called, and the contructor is autowired with a bean of StandardEnvironment, while the bean defined in my configuration is instantiated when the application startup, and autowired with a bean of StandardReactiveWebEnvironment.
Very confused!
My english is not so good.Thank you for reading the whole description!
Here is my code below:
`@Slf4j
public class CustomLoadBalancer implements ReactorServiceInstanceLoadBalancer {
// ...detail omitted
}
@Configuration(proxyBeanMethods = false)
@ConditionalOnDiscoveryEnabled
public class CustomLoadBalancerClientConfiguration {
@Bean
public ReactorLoadBalancer<ServiceInstance> reactorServiceInstanceLoadBalancer(Environment environment, LoadBalancerClientFactory loadBalancerClientFactory, ServiceInstanceChooser serviceInstanceChooser) {
String name = loadBalancerClientFactory.getName(environment);
return new CustomLoadBalancer(serviceInstanceChooser, loadBalancerClientFactory.getLazyProvider(name, ServiceInstanceListSupplier.class), name);
}
}
答案1
得分: 2
一个独立的上下文，包括 ReactorServiceInstanceLoadBalancer 实例，会根据所请求的 serviceId 进行创建。可以自行提供实现，无论是默认实现还是针对特定服务的实现。有关如何为 Spring Cloud LoadBalancer 提供自定义配置，请参阅文档。
英文:
A separate context, including the ReactorServiceInstanceLoadBalancer instance is created per requested serviceId. It is possible, to provide your own implementation, both default or for a specific service. Please see the documentation on how to provide custom configuration for Spring Cloud LoadBalancer.
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