迁移netflix在Spring Boot 1.x中假装在Spring Boot 2.x中打开

Question

我尝试迁移Spring Boot 1.x.y（Brussels-SR12）到2xy我使用qazxsw poi

我更改了Maven配置：

FeignClients

所以

<spring-cloud.version>Finchley.RELEASE</spring-cloud.version>

我改变所有导入：

<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-openfeign</artifactId>
<version>2.0.0.RELEASE</version>

至

import org.springframework.cloud.netflix.feign.EnableFeignClients;

import org.springframework.cloud.netflix.feign.FeignClient;

我用这个界面：

import org.springframework.cloud.openfeign.EnableFeignClients;

import org.springframework.cloud.openfeign.FeignClient;

当我运行我的JUnit测试（使用spring上下文）时，我现在有这个错误（不在Springboot 1.x.y和旧的netflix包中）：

@FeignClient(value = "COMPANY", fallbackFactory = CompanyClientFallbackFactory.class, configuration = FeignConfiguration.class)
public interface CompanyClient extends CompanyApi {
}

完整跟踪：

The bean 'COMPANY.FeignClientSpecification', defined in null, could not be registered. A bean with that name has already been defined in null and overriding is disabled.

Answer 1

可能你有多个具有相同名称属性的

java.lang.IllegalStateException: Failed to load ApplicationContext
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:125)
    at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:108)
    at org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener.postProcessFields(MockitoTestExecutionListener.java:99)
    at org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener.injectFields(MockitoTestExecutionListener.java:79)
    at org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener.prepareTestInstance(MockitoTestExecutionListener.java:54)
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:246)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:227)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289)
...
Caused by: org.springframework.beans.factory.support.BeanDefinitionOverrideException: Invalid bean definition with name 'COMPANY.FeignClientSpecification' defined in null: Cannot register bean definition [Generic bean: class [org.springframework.cloud.openfeign.FeignClientSpecification]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null] for bean 'COMPANY.FeignClientSpecification': There is already [Generic bean: class [org.springframework.cloud.openfeign.FeignClientSpecification]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null] bound.
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.registerBeanDefinition(DefaultListableBeanFactory.java:896)
    at org.springframework.cloud.openfeign.FeignClientsRegistrar.registerClientConfiguration(FeignClientsRegistrar.java:355)
    at org.springframework.cloud.openfeign.FeignClientsRegistrar.registerFeignClients(FeignClientsRegistrar.java:155)
    at org.springframework.cloud.openfeign.FeignClientsRegistrar.registerBeanDefinitions(FeignClientsRegistrar.java:83)

定义。

Answer 2

这是解决方案：

如果我们想要创建具有相同名称或url的多个feign客户端，以便它们指向同一服务器但每个都具有不同的自定义配置，那么我们必须使用@FeignClient的contextId属性以避免这些配置bean的名称冲突。

---

@FeignClient

@FeignClient(contextId = "fooClient", name = "stores", configuration = FooConfiguration.class)
public interface FooClient {
    //..
}

@FeignClient(contextId = "barClient", name = "stores", configuration = BarConfiguration.class)
public interface BarClient {
    //..
}

Answer 3

我找到了解决方案：Springboot 2在application.yml中需要一个新参数：

https://github.com/spring-cloud/spring-cloud-openfeign/pull/90/commits/82fa5181fdd2e23e7414521f468ecea88e17d157

Answer 4

考虑通过设置spring.main.allow-bean-definition-overriding = true来重命名其中一个bean或启用覆盖