java - [Spring][Actuators] 无法处理配置类的导入候选

Question

我正在尝试在我的 Spring 项目(而不是 Spring Boot)中实现执行器。我在 pom 文件中添加了以下依赖项:

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-actuator</artifactId>
        <version>1.3.5.RELEASE</version>
    </dependency>

还添加了以下类:

import java.util.Collection;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.actuate.autoconfigure.EndpointAutoConfiguration;
import org.springframework.boot.actuate.autoconfigure.PublicMetricsAutoConfiguration;
import org.springframework.boot.actuate.endpoint.MetricsEndpoint;
import org.springframework.boot.actuate.endpoint.mvc.EndpointHandlerMapping;
import org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter;
import org.springframework.boot.actuate.endpoint.mvc.MvcEndpoint;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;

@Configuration
@Import({EndpointAutoConfiguration.class, PublicMetricsAutoConfiguration.class})
public class SpringBootActuatorConfigBindings {

    @Bean
    @Autowired
    public EndpointHandlerMapping endpointHandlerMapping(Collection<? extends MvcEndpoint> endpoints) {
        return new EndpointHandlerMapping(endpoints);
    }

    @Bean
    @Autowired
    public EndpointMvcAdapter metricsEndPoint(MetricsEndpoint delegate) {
        return new EndpointMvcAdapter(delegate);
    }
}

但是在运行时我遇到以下错误:

[local] [] [ERROR] [2019-04-22T14:24:47,347] [ Console scanner] [work.web.context.ContextLoader] Context initialization failed org.springframework.beans.factory.BeanDefinitionStoreException: Failed to process import candidates for configuration class [com.mycompany.ans.processor.bindings.ProcessorBindings]; nested exception is java.lang.IllegalStateException: Failed to introspect annotated methods on class com.mycompany.ans.processor.bindings.SpringBootActuatorConfigBindings at org.springframework.context.annotation.ConfigurationClassParser.processImports(ConfigurationClassParser.java:599) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:302) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:242) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:199) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:167) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:315) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:232) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:275) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:95) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:691) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:528) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:400) ~[spring-web-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:291) [spring-web-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:103) [spring-web-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:952) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830] at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:558) [jetty-servlet-9.4.12.v20180830.jar:9.4.12.v20180830] at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:917) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830] at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:370) [jetty-servlet-9.4.12.v20180830.jar:9.4.12.v20180830] at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1497) [jetty-webapp-9.4.12.v20180830.jar:9.4.12.v20180830] at org.eclipse.jetty.maven.plugin.JettyWebAppContext.startWebapp(JettyWebAppContext.java:360) [jetty-maven-plugin-9.4.12.v20180830.jar:9.4.12.v20180830] at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1459) [jetty-webapp-9.4.12.v20180830.jar:9.4.12.v20180830] at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:847) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830] at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:287) [jetty-servlet-9.4.12.v20180830.jar:9.4.12.v20180830] at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:545) [jetty-webapp-9.4.12.v20180830.jar:9.4.12.v20180830] at org.eclipse.jetty.maven.plugin.JettyWebAppContext.doStart(JettyWebAppContext.java:428) [jetty-maven-plugin-9.4.12.v20180830.jar:9.4.12.v20180830] at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) [jetty-util-9.4.12.v20180830.jar:9.4.12.v20180830] at org.eclipse.jetty.maven.plugin.JettyRunMojo.restartWebApp(JettyRunMojo.java:517) [jetty-maven-plugin-9.4.12.v20180830.jar:9.4.12.v20180830] at org.eclipse.jetty.maven.plugin.ConsoleScanner.restartWebApp(ConsoleScanner.java:112) [jetty-maven-plugin-9.4.12.v20180830.jar:9.4.12.v20180830] at org.eclipse.jetty.maven.plugin.ConsoleScanner.checkSystemInput(ConsoleScanner.java:76) [jetty-maven-plugin-9.4.12.v20180830.jar:9.4.12.v20180830] at org.eclipse.jetty.maven.plugin.ConsoleScanner.run(ConsoleScanner.java:46) [jetty-maven-plugin-9.4.12.v20180830.jar:9.4.12.v20180830] Caused by: java.lang.IllegalStateException: Failed to introspect annotated methods on class com.mycompany.ans.processor.bindings.SpringBootActuatorConfigBindings at org.springframework.core.type.StandardAnnotationMetadata.getAnnotatedMethods(StandardAnnotationMetadata.java:169) ~[spring-core-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser.retrieveBeanMethodMetadata(ConfigurationClassParser.java:392) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:317) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:242) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser.processImports(ConfigurationClassParser.java:589) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE] ... 29 more Caused by: java.lang.NoClassDefFoundError: org/springframework/web/servlet/mvc/method/annotation/RequestMappingHandlerMapping at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_202] at java.lang.ClassLoader.defineClass(ClassLoader.java:763) ~[?:1.8.0_202] at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.8.0_202] at java.net.URLClassLoader.defineClass(URLClassLoader.java:468) ~[?:1.8.0_202] at java.net.URLClassLoader.access$100(URLClassLoader.java:74) ~[?:1.8.0_202] at java.net.URLClassLoader$1.run(URLClassLoader.java:369) ~[?:1.8.0_202] at java.net.URLClassLoader$1.run(URLClassLoader.java:363) ~[?:1.8.0_202] at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_202] at java.net.URLClassLoader.findClass(URLClassLoader.java:362) ~[?:1.8.0_202] at org.eclipse.jetty.webapp.WebAppClassLoader.foundClass(WebAppClassLoader.java:649) ~[?:?] at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:555) ~[?:?] at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_202] at java.lang.Class.getDeclaredMethods0(Native Method) ~[?:1.8.0_202] at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[?:1.8.0_202] at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[?:1.8.0_202] at org.springframework.core.type.StandardAnnotationMetadata.getAnnotatedMethods(StandardAnnotationMetadata.java:158) ~[spring-core-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser.retrieveBeanMethodMetadata(ConfigurationClassParser.java:392) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:317) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:242) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser.processImports(ConfigurationClassParser.java:589) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE]

我失踪的地方。

Answer 1

如果您检查异常日志:

Caused by: java.lang.IllegalStateException: Failed to introspect annotated methods on class com.mycompany.ans.processor.bindings.SpringBootActuatorConfigBindings
  at org.springframework.core.type.StandardAnnotationMetadata.getAnnotatedMethods(StandardAnnotationMetadata.java:169) ~[spring-core-5.1.1.RELEASE.jar:5.1.1.RELEASE]
  at org.springframework.context.annotation.ConfigurationClassParser.retrieveBeanMethodMetadata(ConfigurationClassParser.java:392) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE]
  at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:317) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE]
  at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:242) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE]
  at org.springframework.context.annotation.ConfigurationClassParser.processImports(ConfigurationClassParser.java:589) ~[spring-context-5.1.1.RELEASE.jar:5.1.1.RELEASE]
  ... 29 more
Caused by: java.lang.NoClassDefFoundError:
  org/springframework/web/servlet/mvc/method/annotation/RequestMappingHandlerMapping
  at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_202]
...

您需要包含 Spring Web mvc 的依赖项，从中实现并需要 RequestMappingHandlerMapping 类。这就是 NoClassDefFoundError 的原因。

<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-webmvc</artifactId>
  <version>${org.springframework.version}</version>
</dependency>