关于springboot:Spring-Boot-Feign调用原理探究

单元测试类如下：

@SpringBootTest(classes = Application.class)@RunWith(SpringRunner.class)public class Test{    @Resource    private AdSupportAccount adSupportAccount;    @Test    publict void test(){        adSupportAccount.list(accountInfoQuery);    }}

Feign申明如下：

@FeignClient(value = "account-provider", url = "${account}")public interface AdSupportAccount {    /**     * 分页查问account 列表     *     * @param accountInfoQuery     * @return     */    @PostMapping("accountInfo/list")    KkbResponse<Map<String, Object>> list(@RequestBody AccountInfoQuery accountInfoQuery);}

debug能够看到AdSupportAccount实例其实被代理类FeignINvocationHandler持有

registerBeanDefinition:929, DefaultListableBeanFactory (org.springframework.beans.factory.support)registerBeanDefinition:164, BeanDefinitionReaderUtils (org.springframework.beans.factory.support)registerFeignClient:258, FeignClientsRegistrar (org.springframework.cloud.openfeign)registerFeignClients:219, FeignClientsRegistrar (org.springframework.cloud.openfeign)registerBeanDefinitions:144, FeignClientsRegistrar (org.springframework.cloud.openfeign)registerBeanDefinitions:86, ImportBeanDefinitionRegistrar (org.springframework.context.annotation)lambda$loadBeanDefinitionsFromRegistrars$1:384, ConfigurationClassBeanDefinitionReader (org.springframework.context.annotation)accept:-1, 1868288866 (org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader$$Lambda$276)forEach:684, LinkedHashMap (java.util)loadBeanDefinitionsFromRegistrars:383, ConfigurationClassBeanDefinitionReader (org.springframework.context.annotation)loadBeanDefinitionsForConfigurationClass:148, ConfigurationClassBeanDefinitionReader (org.springframework.context.annotation)loadBeanDefinitions:120, ConfigurationClassBeanDefinitionReader (org.springframework.context.annotation)processConfigBeanDefinitions:332, ConfigurationClassPostProcessor (org.springframework.context.annotation)postProcessBeanDefinitionRegistry:237, ConfigurationClassPostProcessor (org.springframework.context.annotation)invokeBeanDefinitionRegistryPostProcessors:280, PostProcessorRegistrationDelegate (org.springframework.context.support)invokeBeanFactoryPostProcessors:96, PostProcessorRegistrationDelegate (org.springframework.context.support)invokeBeanFactoryPostProcessors:707, AbstractApplicationContext (org.springframework.context.support)refresh:533, AbstractApplicationContext (org.springframework.context.support)refresh:755, SpringApplication (org.springframework.boot)refresh:747, SpringApplication (org.springframework.boot)refreshContext:402, SpringApplication (org.springframework.boot)run:312, SpringApplication (org.springframework.boot)loadContext:120, SpringBootContextLoader (org.springframework.boot.test.context)loadContextInternal:99, DefaultCacheAwareContextLoaderDelegate (org.springframework.test.context.cache)loadContext:124, DefaultCacheAwareContextLoaderDelegate (org.springframework.test.context.cache)getApplicationContext:123, DefaultTestContext (org.springframework.test.context.support)setUpRequestContextIfNecessary:190, ServletTestExecutionListener (org.springframework.test.context.web)prepareTestInstance:132, ServletTestExecutionListener (org.springframework.test.context.web)prepareTestInstance:244, TestContextManager (org.springframework.test.context)createTest:227, SpringJUnit4ClassRunner (org.springframework.test.context.junit4)runReflectiveCall:289, SpringJUnit4ClassRunner$1 (org.springframework.test.context.junit4)run:12, ReflectiveCallable (org.junit.internal.runners.model)methodBlock:291, SpringJUnit4ClassRunner (org.springframework.test.context.junit4)runChild:246, SpringJUnit4ClassRunner (org.springframework.test.context.junit4)runChild:97, SpringJUnit4ClassRunner (org.springframework.test.context.junit4)run:331, ParentRunner$4 (org.junit.runners)schedule:79, ParentRunner$1 (org.junit.runners)runChildren:329, ParentRunner (org.junit.runners)access$100:66, ParentRunner (org.junit.runners)evaluate:293, ParentRunner$2 (org.junit.runners)evaluate:61, RunBeforeTestClassCallbacks (org.springframework.test.context.junit4.statements)evaluate:70, RunAfterTestClassCallbacks (org.springframework.test.context.junit4.statements)evaluate:306, ParentRunner$3 (org.junit.runners)run:413, ParentRunner (org.junit.runners)run:190, SpringJUnit4ClassRunner (org.springframework.test.context.junit4)run:137, JUnitCore (org.junit.runner)startRunnerWithArgs:69, JUnit4IdeaTestRunner (com.intellij.junit4)startRunnerWithArgs:33, IdeaTestRunner$Repeater (com.intellij.rt.junit)prepareStreamsAndStart:235, JUnitStarter (com.intellij.rt.junit)main:54, JUnitStarter (com.intellij.rt.junit)

loadBeanDefinitionsForConfigurationClass:148, ConfigurationClassBeanDefinitionReader (org.springframework.context.annotation)

registerBeanDefinitions:86, ImportBeanDefinitionRegistrar (org.springframework.context.annotation)

registerBeanDefinitions:144, FeignClientsRegistrar (org.springframework.cloud.openfeign)

registerFeignClients:219, FeignClientsRegistrar (org.springframework.cloud.openfeign)

registerFeignClient:258, FeignClientsRegistrar (org.springframework.cloud.openfeign)

registerBeanDefinition:164, BeanDefinitionReaderUtils (org.springframework.beans.factory.support)

registerBeanDefinition:975, DefaultListableBeanFactory                     this.beanDefinitionMap.put(beanName, beanDefinition);

getObject:251, FeignClientFactoryBean (org.springframework.cloud.openfeign)doGetObjectFromFactoryBean:169, FactoryBeanRegistrySupport (org.springframework.beans.factory.support)getObjectFromFactoryBean:101, FactoryBeanRegistrySupport (org.springframework.beans.factory.support)getObjectForBeanInstance:1828, AbstractBeanFactory (org.springframework.beans.factory.support)getObjectForBeanInstance:1270, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)doGetBean:261, AbstractBeanFactory (org.springframework.beans.factory.support) [6]getBean:202, AbstractBeanFactory (org.springframework.beans.factory.support)resolveCandidate:276, DependencyDescriptor (org.springframework.beans.factory.config)addCandidateEntry:1532, DefaultListableBeanFactory (org.springframework.beans.factory.support)findAutowireCandidates:1489, DefaultListableBeanFactory (org.springframework.beans.factory.support)doResolveDependency:1270, DefaultListableBeanFactory (org.springframework.beans.factory.support)resolveDependency:1227, DefaultListableBeanFactory (org.springframework.beans.factory.support)autowireResource:521, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)getResource:497, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)getResourceToInject:650, CommonAnnotationBeanPostProcessor$ResourceElement (org.springframework.context.annotation)inject:228, InjectionMetadata$InjectedElement (org.springframework.beans.factory.annotation)inject:119, InjectionMetadata (org.springframework.beans.factory.annotation)postProcessProperties:318, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)populateBean:1425, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)doCreateBean:593, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)createBean:516, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)lambda$doGetBean$0:324, AbstractBeanFactory (org.springframework.beans.factory.support)getObject:-1, 294505405 (org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$240)getSingleton:234, DefaultSingletonBeanRegistry (org.springframework.beans.factory.support)doGetBean:322, AbstractBeanFactory (org.springframework.beans.factory.support) [5]getBean:207, AbstractBeanFactory (org.springframework.beans.factory.support)resolveBeanByName:453, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)autowireResource:527, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)getResource:497, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)getResourceToInject:650, CommonAnnotationBeanPostProcessor$ResourceElement (org.springframework.context.annotation)inject:228, InjectionMetadata$InjectedElement (org.springframework.beans.factory.annotation)inject:119, InjectionMetadata (org.springframework.beans.factory.annotation)postProcessProperties:318, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)populateBean:1425, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)doCreateBean:593, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)createBean:516, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)lambda$doGetBean$0:324, AbstractBeanFactory (org.springframework.beans.factory.support)getObject:-1, 294505405 (org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$240)getSingleton:234, DefaultSingletonBeanRegistry (org.springframework.beans.factory.support)doGetBean:322, AbstractBeanFactory (org.springframework.beans.factory.support) [4]getBean:207, AbstractBeanFactory (org.springframework.beans.factory.support)resolveBeanByName:453, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)autowireResource:527, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)getResource:497, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)getResourceToInject:650, CommonAnnotationBeanPostProcessor$ResourceElement (org.springframework.context.annotation)inject:228, InjectionMetadata$InjectedElement (org.springframework.beans.factory.annotation)inject:119, InjectionMetadata (org.springframework.beans.factory.annotation)postProcessProperties:318, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)populateBean:1425, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)doCreateBean:593, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)createBean:516, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)lambda$doGetBean$0:324, AbstractBeanFactory (org.springframework.beans.factory.support)getObject:-1, 294505405 (org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$240)getSingleton:234, DefaultSingletonBeanRegistry (org.springframework.beans.factory.support)doGetBean:322, AbstractBeanFactory (org.springframework.beans.factory.support) [3]getBean:207, AbstractBeanFactory (org.springframework.beans.factory.support)resolveBeanByName:453, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)autowireResource:527, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)getResource:497, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)getResourceToInject:650, CommonAnnotationBeanPostProcessor$ResourceElement (org.springframework.context.annotation)inject:228, InjectionMetadata$InjectedElement (org.springframework.beans.factory.annotation)inject:119, InjectionMetadata (org.springframework.beans.factory.annotation)postProcessProperties:318, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)populateBean:1425, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)doCreateBean:593, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)createBean:516, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)lambda$doGetBean$0:324, AbstractBeanFactory (org.springframework.beans.factory.support)getObject:-1, 294505405 (org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$240)getSingleton:234, DefaultSingletonBeanRegistry (org.springframework.beans.factory.support)doGetBean:322, AbstractBeanFactory (org.springframework.beans.factory.support) [2]getBean:207, AbstractBeanFactory (org.springframework.beans.factory.support)resolveBeanByName:453, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)autowireResource:527, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)getResource:497, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)getResourceToInject:650, CommonAnnotationBeanPostProcessor$ResourceElement (org.springframework.context.annotation)inject:228, InjectionMetadata$InjectedElement (org.springframework.beans.factory.annotation)inject:119, InjectionMetadata (org.springframework.beans.factory.annotation)postProcessProperties:318, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)populateBean:1425, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)doCreateBean:593, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)createBean:516, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)lambda$doGetBean$0:324, AbstractBeanFactory (org.springframework.beans.factory.support)getObject:-1, 294505405 (org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$240)getSingleton:234, DefaultSingletonBeanRegistry (org.springframework.beans.factory.support)doGetBean:322, AbstractBeanFactory (org.springframework.beans.factory.support) [1]getBean:202, AbstractBeanFactory (org.springframework.beans.factory.support)preInstantiateSingletons:897, DefaultListableBeanFactory (org.springframework.beans.factory.support)finishBeanFactoryInitialization:879, AbstractApplicationContext (org.springframework.context.support)refresh:551, AbstractApplicationContext (org.springframework.context.support)refresh:755, SpringApplication (org.springframework.boot)refresh:747, SpringApplication (org.springframework.boot)refreshContext:402, SpringApplication (org.springframework.boot)run:312, SpringApplication (org.springframework.boot)loadContext:120, SpringBootContextLoader (org.springframework.boot.test.context)loadContextInternal:99, DefaultCacheAwareContextLoaderDelegate (org.springframework.test.context.cache)loadContext:124, DefaultCacheAwareContextLoaderDelegate (org.springframework.test.context.cache)getApplicationContext:123, DefaultTestContext (org.springframework.test.context.support)setUpRequestContextIfNecessary:190, ServletTestExecutionListener (org.springframework.test.context.web)prepareTestInstance:132, ServletTestExecutionListener (org.springframework.test.context.web)prepareTestInstance:244, TestContextManager (org.springframework.test.context)createTest:227, SpringJUnit4ClassRunner (org.springframework.test.context.junit4)runReflectiveCall:289, SpringJUnit4ClassRunner$1 (org.springframework.test.context.junit4)run:12, ReflectiveCallable (org.junit.internal.runners.model)methodBlock:291, SpringJUnit4ClassRunner (org.springframework.test.context.junit4)runChild:246, SpringJUnit4ClassRunner (org.springframework.test.context.junit4)runChild:97, SpringJUnit4ClassRunner (org.springframework.test.context.junit4)run:331, ParentRunner$4 (org.junit.runners)schedule:79, ParentRunner$1 (org.junit.runners)runChildren:329, ParentRunner (org.junit.runners)access$100:66, ParentRunner (org.junit.runners)evaluate:293, ParentRunner$2 (org.junit.runners)evaluate:61, RunBeforeTestClassCallbacks (org.springframework.test.context.junit4.statements)evaluate:70, RunAfterTestClassCallbacks (org.springframework.test.context.junit4.statements)evaluate:306, ParentRunner$3 (org.junit.runners)run:413, ParentRunner (org.junit.runners)run:190, SpringJUnit4ClassRunner (org.springframework.test.context.junit4)run:137, JUnitCore (org.junit.runner)startRunnerWithArgs:69, JUnit4IdeaTestRunner (com.intellij.junit4)startRunnerWithArgs:33, IdeaTestRunner$Repeater (com.intellij.rt.junit)prepareStreamsAndStart:235, JUnitStarter (com.intellij.rt.junit)main:54, JUnitStarter (com.intellij.rt.junit)

getObject:251, FeignClientFactoryBean (org.springframework.cloud.openfeign)

doGetObjectFromFactoryBean:177, FactoryBeanRegistrySupport (org.springframework.beans.factory.support)getObjectFromFactoryBean:101, FactoryBeanRegistrySupport (org.springframework.beans.factory.support)getObjectForBeanInstance:1828, AbstractBeanFactory (org.springframework.beans.factory.support)getObjectForBeanInstance:1270, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)doGetBean:261, AbstractBeanFactory (org.springframework.beans.factory.support)getBean:202, AbstractBeanFactory (org.springframework.beans.factory.support)resolveCandidate:276, DependencyDescriptor (org.springframework.beans.factory.config)addCandidateEntry:1532, DefaultListableBeanFactory (org.springframework.beans.factory.support)findAutowireCandidates:1489, DefaultListableBeanFactory (org.springframework.beans.factory.support)doResolveDependency:1270, DefaultListableBeanFactory (org.springframework.beans.factory.support)resolveDependency:1227, DefaultListableBeanFactory (org.springframework.beans.factory.support)autowireResource:521, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)getResource:497, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)getResourceToInject:650, CommonAnnotationBeanPostProcessor$ResourceElement (org.springframework.context.annotation)inject:228, InjectionMetadata$InjectedElement (org.springframework.beans.factory.annotation)inject:119, InjectionMetadata (org.springframework.beans.factory.annotation)postProcessProperties:318, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)populateBean:1425, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)doCreateBean:593, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)createBean:516, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)lambda$doGetBean$0:324, AbstractBeanFactory (org.springframework.beans.factory.support)getObject:-1, 294505405 (org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$240)getSingleton:234, DefaultSingletonBeanRegistry (org.springframework.beans.factory.support)doGetBean:322, AbstractBeanFactory (org.springframework.beans.factory.support)getBean:207, AbstractBeanFactory (org.springframework.beans.factory.support)resolveBeanByName:453, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)autowireResource:527, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)getResource:497, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)getResourceToInject:650, CommonAnnotationBeanPostProcessor$ResourceElement (org.springframework.context.annotation)inject:228, InjectionMetadata$InjectedElement (org.springframework.beans.factory.annotation)inject:119, InjectionMetadata (org.springframework.beans.factory.annotation)postProcessProperties:318, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)populateBean:1425, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)doCreateBean:593, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)createBean:516, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)lambda$doGetBean$0:324, AbstractBeanFactory (org.springframework.beans.factory.support)getObject:-1, 294505405 (org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$240)getSingleton:234, DefaultSingletonBeanRegistry (org.springframework.beans.factory.support)doGetBean:322, AbstractBeanFactory (org.springframework.beans.factory.support)getBean:207, AbstractBeanFactory (org.springframework.beans.factory.support)resolveBeanByName:453, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)autowireResource:527, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)getResource:497, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)getResourceToInject:650, CommonAnnotationBeanPostProcessor$ResourceElement (org.springframework.context.annotation)inject:228, InjectionMetadata$InjectedElement (org.springframework.beans.factory.annotation)inject:119, InjectionMetadata (org.springframework.beans.factory.annotation)postProcessProperties:318, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)populateBean:1425, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)doCreateBean:593, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)createBean:516, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)lambda$doGetBean$0:324, AbstractBeanFactory (org.springframework.beans.factory.support)getObject:-1, 294505405 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CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)getResourceToInject:650, CommonAnnotationBeanPostProcessor$ResourceElement (org.springframework.context.annotation)inject:228, InjectionMetadata$InjectedElement (org.springframework.beans.factory.annotation)inject:119, InjectionMetadata (org.springframework.beans.factory.annotation)postProcessProperties:318, CommonAnnotationBeanPostProcessor (org.springframework.context.annotation)populateBean:1425, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)doCreateBean:593, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)createBean:516, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)lambda$doGetBean$0:324, AbstractBeanFactory (org.springframework.beans.factory.support)getObject:-1, 294505405 (org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$240)getSingleton:234, DefaultSingletonBeanRegistry 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(org.springframework.test.context.cache)getApplicationContext:123, DefaultTestContext (org.springframework.test.context.support)setUpRequestContextIfNecessary:190, ServletTestExecutionListener (org.springframework.test.context.web)prepareTestInstance:132, ServletTestExecutionListener (org.springframework.test.context.web)prepareTestInstance:244, TestContextManager (org.springframework.test.context)createTest:227, SpringJUnit4ClassRunner (org.springframework.test.context.junit4)runReflectiveCall:289, SpringJUnit4ClassRunner$1 (org.springframework.test.context.junit4)run:12, ReflectiveCallable (org.junit.internal.runners.model)methodBlock:291, SpringJUnit4ClassRunner (org.springframework.test.context.junit4)runChild:246, SpringJUnit4ClassRunner (org.springframework.test.context.junit4)runChild:97, SpringJUnit4ClassRunner (org.springframework.test.context.junit4)run:331, ParentRunner$4 (org.junit.runners)schedule:79, ParentRunner$1 (org.junit.runners)runChildren:329, ParentRunner (org.junit.runners)access$100:66, ParentRunner (org.junit.runners)evaluate:293, ParentRunner$2 (org.junit.runners)evaluate:61, RunBeforeTestClassCallbacks (org.springframework.test.context.junit4.statements)evaluate:70, RunAfterTestClassCallbacks (org.springframework.test.context.junit4.statements)evaluate:306, ParentRunner$3 (org.junit.runners)run:413, ParentRunner (org.junit.runners)run:190, SpringJUnit4ClassRunner (org.springframework.test.context.junit4)run:137, JUnitCore (org.junit.runner)startRunnerWithArgs:69, JUnit4IdeaTestRunner (com.intellij.junit4)startRunnerWithArgs:33, IdeaTestRunner$Repeater (com.intellij.rt.junit)prepareStreamsAndStart:235, JUnitStarter (com.intellij.rt.junit)main:54, JUnitStarter (com.intellij.rt.junit)

截取第一行信息

doGetObjectFromFactoryBean:177, FactoryBeanRegistrySupport (org.springframework.beans.factory.support)

能够看到咱们申明的AdSupportAccount实例对象：

其实是FeignInvocationHandler.ReflectiveFeign;这样一来久首尾呼应了！