Estoy tratando de agregar Feign y Hystrix a mi proyecto existente de Spring Boot.
Agregué estas dos dependencias a pom.xml:
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-hystrix</artifactId>
<version>${spring-cloud.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-feign</artifactId>
<version>${spring-cloud.version}</version>
</dependency>
El proyecto se compila, pero cuando inicio el servidor, obtengo esta excepción:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name "org.springframework.cloud.netflix.feign.ribbon.FeignRibbonClientAutoConfiguration$OkHttpConfiguration": Post-processing failed of bean type [class org.springframework.cloud.netflix.feign.ribbon.FeignRibbonClientAutoConfiguration$OkHttpConfiguration$$EnhancerBySpringCGLIB$$3ecc7446] failed; nested exception is java.lang.IllegalStateException: Failed to introspect bean class [org.springframework.cloud.netflix.feign.ribbon.FeignRibbonClientAutoConfiguration$OkHttpConfiguration$$EnhancerBySpringCGLIB$$3ecc7446] for persistence metadata: could not find class that it depends on
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:945) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:518) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:751) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:761) [spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:371) [spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1186) [spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1175) [spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
at com.ifood.next.NextApplication.main(NextApplication.java:27) [classes/:?]
Caused by: java.lang.ClassNotFoundException: com.squareup.okhttp.OkHttpClient
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_101]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_101]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[?:1.8.0_101]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_101]
at java.lang.Class.getDeclaredFields0(Native Method) ~[?:1.8.0_101]
at java.lang.Class.privateGetDeclaredFields(Class.java:2583) ~[?:1.8.0_101]
at java.lang.Class.getDeclaredFields(Class.java:1916) ~[?:1.8.0_101]
at org.springframework.util.ReflectionUtils.getDeclaredFields(ReflectionUtils.java:713) ~[spring-core-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.util.ReflectionUtils.doWithLocalFields(ReflectionUtils.java:655) ~[spring-core-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.buildPersistenceMetadata(PersistenceAnnotationBeanPostProcessor.java:418) ~[spring-orm-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.findPersistenceMetadata(PersistenceAnnotationBeanPostProcessor.java:397) ~[spring-orm-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(PersistenceAnnotationBeanPostProcessor.java:333) ~[spring-orm-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:940) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
... 16 more
He probado la versión 1.1.5.RELEASE y 1.2.3.RELEASE, ambos me dan el mismo error.
¿Así que aparentemente, depende de una versión antigua de OKHttp? La versión actual es com.squareup.okhttp3.OkHttpClient
¿Me faltan más dependencias? Es difícil encontrar ejemplos y tutoriales para estos módulos, ya que son bastante nuevos.
Respuestas
1 para la respuesta № 1Parece que Spring Cloud Feign utiliza OpenFeign que se ha actualizado para usar OkHttp3 en este commit (https://github.com/OpenFeign/feign/commit/3d84c767ba464b2a75e3e1e6c002b0173da268f1). Puedes intentar forzar una nueva versión de https://github.com/OpenFeign/feign y ver si eso ayuda.
Mirando las dependencias en https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-ribbon/1.2.3.RELEASE Parece que se usó la versión 2.2.0 de Netflix Libraries y se lanzó en abril de 2016, un mes antes de la confirmación en la que OkHttp se actualizó a la versión 3.
Intenta forzar la versión 2.2.2.