[AOP] 3. Spring AOP中提供的种种Aspects - Tracing相关

本文探讨Spring AOP中的Legacy Aspects,包括DebugInterceptor、CustomizableTraceInterceptor和PerformanceMonitorInterceptor。这些Aspects虽然历史悠久,但仍有其价值。DebugInterceptor记录调用次数,CustomizableTraceInterceptor提供自定义输出,而PerformanceMonitorInterceptor关注方法执行时间。文章还介绍了Spring AOP的基本架构,强调了Interceptor在AOP中的角色和其与AroundAdvice的关系。

在第一篇文章中,介绍了AOP的一些背景知识以及如何快速上手,然后在第二篇中详细分析了AOP的两种实现 - Spring AOP以及AspectJ。

本文偏向于实践,继续介绍Spring AOP中提供的种种Legacy Aspects。虽然这些Aspects的历史已经比较久远了(好多都是在Spring 1.x时代就存在了),但是并不妨碍我们理解它们背后蕴含的思想以及见识AOP能够解决的问题域。了解这些现成的Aspects,将它们放入我们的工具包,在需要的时候拿出来就能用,而无需重复造轮子;或者将它们有针对性地进行改进,更好地契合我们要解决的问题。

主要会介绍下面几种Aspects,它们都位于包org.springframework.aop.interceptor下:

  1. DebugInterceptor
  2. CustomizableTraceInterceptor
  3. PerformanceMonitorInterceptor
  4. AsyncExecutionInterceptor(下一篇文章中介绍)
  5. ConcurrencyThrottleInterceptor(下一篇文章中介绍)

Spring AOP(Legacy)基本架构

在介绍具体的Aspect实现之前,先来看看Spring AOP(Legacy)的基本架构:

Advice是所有Aspect都会实现的一个接口,它实际上是一个Marker Interface:

/**
 * Tag interface for Advice. Implementations can be any type
 * of advice, such as Interceptors.
 *
 * @author Rod Johnson
 * @version $Id: Advice.java,v 1.1 2004/03/19 17:02:16 johnsonr Exp $
 */
public interface Advice {
   
   

}

这个接口已经是个很老的接口了,从Spring 1.1就开始存在了。Spring作者亲自操刀的代码哦,其实本文介绍的这些Aspects以及基础类型和接口基本上都有他的身影。

然后在Advice下面,有四个子接口:

  • Interceptor
  • BeforeAdvice
  • AfterAdvice
  • DynamicIntroductionAdvice

为什么要在本小节的标题里面加上一个(Legacy)呢?主要原因在于本文主要会聚焦于第一个Interceptor。它是Spring在未融合AspectJ时,独立创建出来的一套AOP的解决方案,只不过后来应该是作者发现了AspectJ和Spring AOP有不少业务上有重合之处,因此慢慢走在了一起。因此,基于Interceptor的这套方案不妨称它为Legacy Spring AOP。

关于Interceptor这个接口和由它派生出来的类型,大概是这个样子的(蓝色部分是本文会介绍的几个Aspects):

直接继承Advice接口的Interceptor长这样:

/**
 * This interface represents a generic interceptor.
 *
 * // ......
 * This interface is not used directly. Use the sub-interfaces
 * to intercept specific events.
 * // ......
 *
 * @author Rod Johnson
 * @see Joinpoint
 */
public interface Interceptor extends Advice {
   
   

}

这个Interceptor仍然是个Marker Interface,没有任何实质定义。事实上,Spring一直都在下一盘大棋,所以表现在代码结构上就是预留的扩展点非常多,回过头来看可能结构上有一些臃肿,不够简练。看看2004年和如今2017年,Spring项目的规模差距就知道了。所以从这个意义上而言,学习Spring,主要学习它是如何设计的,如何抽象的。毕竟Spring已经是事实上的JaveEE参考实现了,现如今正统的EJB反倒是无人问津。

这个接口,有2个子接口:

  • ConstructorInterceptor
  • MethodInterceptor

第一个接口实际上没有任何实现,这里就不讨论它了。
需要讨论的是MethodInterceptor这个接口

springboot连接达梦数据库 spring: application: name: day0704 datasource: driver-class-name: dm.jdbc.driver.DmDriver url: jdbc:dm://localhost:5236/ROOT?zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=utf-8 username: ROOT password: 20050528Hyn D:\develop\Java21\jdk-21\bin\java.exe -XX:TieredStopAtLevel=1 -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-Dmanagement.endpoints.jmx.exposure.include=*" "-javaagent:D:\JAVA\IntelliJ IDEA 2024.1.4\lib\idea_rt.jar=59885:D:\JAVA\IntelliJ IDEA 2024.1.4\bin" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath 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\repository\org\springframework\security\spring-security-crypto\6.3.10\spring-security-crypto-6.3.10.jar;C:\Users\H\.m2\repository\org\springframework\boot\spring-boot-starter-validation\3.3.13\spring-boot-starter-validation-3.3.13.jar;C:\Users\H\.m2\repository\org\apache\tomcat\embed\tomcat-embed-el\10.1.42\tomcat-embed-el-10.1.42.jar;C:\Users\H\.m2\repository\org\hibernate\validator\hibernate-validator\8.0.2.Final\hibernate-validator-8.0.2.Final.jar;C:\Users\H\.m2\repository\jakarta\validation\jakarta.validation-api\3.0.2\jakarta.validation-api-3.0.2.jar;C:\Users\H\.m2\repository\com\auth0\java-jwt\4.4.0\java-jwt-4.4.0.jar;C:\Users\H\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.17.3\jackson-databind-2.17.3.jar;C:\Users\H\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.17.3\jackson-annotations-2.17.3.jar;C:\Users\H\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.17.3\jackson-core-2.17.3.jar;C:\Users\H\.m2\repository\com\github\pagehelper\pagehelper-spring-boot-starter\1.4.6\pagehelper-spring-boot-starter-1.4.6.jar;C:\Users\H\.m2\repository\com\github\pagehelper\pagehelper-spring-boot-autoconfigure\1.4.6\pagehelper-spring-boot-autoconfigure-1.4.6.jar;C:\Users\H\.m2\repository\com\github\pagehelper\pagehelper\5.3.2\pagehelper-5.3.2.jar;C:\Users\H\.m2\repository\com\github\jsqlparser\jsqlparser\4.5\jsqlparser-4.5.jar;C:\Users\H\.m2\repository\com\aliyun\oss\aliyun-sdk-oss\3.17.4\aliyun-sdk-oss-3.17.4.jar;C:\Users\H\.m2\repository\org\apache\httpcomponents\httpclient\4.5.13\httpclient-4.5.13.jar;C:\Users\H\.m2\repository\org\apache\httpcomponents\httpcore\4.4.16\httpcore-4.4.16.jar;C:\Users\H\.m2\repository\commons-logging\commons-logging\1.2\commons-logging-1.2.jar;C:\Users\H\.m2\repository\commons-codec\commons-codec\1.16.1\commons-codec-1.16.1.jar;C:\Users\H\.m2\repository\org\jdom\jdom2\2.0.6.1\jdom2-2.0.6.1.jar;C:\Users\H\.m2\repository\org\codehaus\jettison\jettison\1.5.4\jettison-1.5.4.jar;C:\Users\H\.m2\repository\com\aliyun\aliyun-java-sdk-core\4.5.10\aliyun-java-sdk-core-4.5.10.jar;C:\Users\H\.m2\repository\com\google\code\gson\gson\2.10.1\gson-2.10.1.jar;C:\Users\H\.m2\repository\org\jacoco\org.jacoco.agent\0.8.5\org.jacoco.agent-0.8.5-runtime.jar;C:\Users\H\.m2\repository\org\ini4j\ini4j\0.5.4\ini4j-0.5.4.jar;C:\Users\H\.m2\repository\io\opentracing\opentracing-api\0.33.0\opentracing-api-0.33.0.jar;C:\Users\H\.m2\repository\io\opentracing\opentracing-util\0.33.0\opentracing-util-0.33.0.jar;C:\Users\H\.m2\repository\io\opentracing\opentracing-noop\0.33.0\opentracing-noop-0.33.0.jar;C:\Users\H\.m2\repository\com\aliyun\aliyun-java-sdk-ram\3.1.0\aliyun-java-sdk-ram-3.1.0.jar;C:\Users\H\.m2\repository\com\aliyun\aliyun-java-sdk-kms\2.11.0\aliyun-java-sdk-kms-2.11.0.jar;C:\Users\H\.m2\repository\javax\xml\bind\jaxb-api\2.3.1\jaxb-api-2.3.1.jar;C:\Users\H\.m2\repository\javax\activation\javax.activation-api\1.2.0\javax.activation-api-1.2.0.jar;C:\Users\H\.m2\repository\javax\activation\activation\1.1.1\activation-1.1.1.jar;C:\Users\H\.m2\repository\org\glassfish\jaxb\jaxb-runtime\2.3.3\jaxb-runtime-2.3.3.jar;C:\Users\H\.m2\repository\org\glassfish\jaxb\txw2\4.0.5\txw2-4.0.5.jar;C:\Users\H\.m2\repository\com\sun\istack\istack-commons-runtime\4.1.2\istack-commons-runtime-4.1.2.jar;C:\Users\H\.m2\repository\com\sun\activation\jakarta.activation\1.2.2\jakarta.activation-1.2.2.jar;C:\Users\H\.m2\repository\com\dm\DmJdbcDriver\1.8.0\DmJdbcDriver-1.8.0.jar com.example.day0704.Day0704Application . ____ _ __ _ _ /\\ / ___&#39;_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | &#39;_ | &#39;_| | &#39;_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) &#39; |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v3.3.13) 2025-07-04T11:38:43.764+08:00 INFO 26280 --- [day0704] [ main] com.example.day0704.Day0704Application : Starting Day0704Application using Java 21.0.3 with PID 26280 (D:\2024javaweb\代码\2024javaweb\day0704\target\classes started by H in D:\2024javaweb\代码\2024javaweb\day0704) 2025-07-04T11:38:43.765+08:00 INFO 26280 --- [day0704] [ main] com.example.day0704.Day0704Application : No active profile set, falling back to 1 default profile: "default" 2025-07-04T11:38:44.114+08:00 INFO 26280 --- [day0704] [ main] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode 2025-07-04T11:38:44.114+08:00 INFO 26280 --- [day0704] [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode. 2025-07-04T11:38:44.125+08:00 INFO 26280 --- [day0704] [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 7 ms. Found 0 JPA repository interfaces. 2025-07-04T11:38:44.131+08:00 INFO 26280 --- [day0704] [ main] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode 2025-07-04T11:38:44.131+08:00 INFO 26280 --- [day0704] [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data LDAP repositories in DEFAULT mode. 2025-07-04T11:38:44.134+08:00 INFO 26280 --- [day0704] [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 3 ms. Found 0 LDAP repository interfaces. 2025-07-04T11:38:44.441+08:00 INFO 26280 --- [day0704] [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port 8080 (http) 2025-07-04T11:38:44.448+08:00 INFO 26280 --- [day0704] [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat] 2025-07-04T11:38:44.448+08:00 INFO 26280 --- [day0704] [ main] o.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/10.1.42] 2025-07-04T11:38:44.506+08:00 INFO 26280 --- [day0704] [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext 2025-07-04T11:38:44.506+08:00 INFO 26280 --- [day0704] [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 720 ms 2025-07-04T11:38:44.556+08:00 INFO 26280 --- [day0704] [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting... 2025-07-04T11:38:44.602+08:00 INFO 26280 --- [day0704] [ main] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Added connection dm.jdbc.driver.DmdbConnection@6b162ecc 2025-07-04T11:38:44.603+08:00 INFO 26280 --- [day0704] [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed. 2025-07-04T11:38:44.611+08:00 WARN 26280 --- [day0704] [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name &#39;entityManagerFactory&#39; defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Failed to initialize dependency &#39;jdbcSessionDataSourceScriptDatabaseInitializer&#39; of LoadTimeWeaverAware bean &#39;entityManagerFactory&#39;: Error creating bean with name &#39;jdbcSessionDataSourceScriptDatabaseInitializer&#39; defined in class path resource [org/springframework/boot/autoconfigure/session/JdbcSessionConfiguration.class]: Failed to instantiate [org.springframework.boot.autoconfigure.session.JdbcSessionDataSourceScriptDatabaseInitializer]: Factory method &#39;jdbcSessionDataSourceScriptDatabaseInitializer&#39; threw exception with message: Unable to detect database type 2025-07-04T11:38:44.611+08:00 INFO 26280 --- [day0704] [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated... 2025-07-04T11:38:44.612+08:00 INFO 26280 --- [day0704] [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed. 2025-07-04T11:38:44.613+08:00 INFO 26280 --- [day0704] [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat] 2025-07-04T11:38:44.618+08:00 INFO 26280 --- [day0704] [ main] .s.b.a.l.ConditionEvaluationReportLogger : Error starting ApplicationContext. To display the condition evaluation report re-run your application with &#39;debug&#39; enabled. 2025-07-04T11:38:44.626+08:00 ERROR 26280 --- [day0704] [ main] o.s.boot.SpringApplication : Application run failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name &#39;entityManagerFactory&#39; defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Failed to initialize dependency &#39;jdbcSessionDataSourceScriptDatabaseInitializer&#39; of LoadTimeWeaverAware bean &#39;entityManagerFactory&#39;: Error creating bean with name &#39;jdbcSessionDataSourceScriptDatabaseInitializer&#39; defined in class path resource [org/springframework/boot/autoconfigure/session/JdbcSessionConfiguration.class]: Failed to instantiate [org.springframework.boot.autoconfigure.session.JdbcSessionDataSourceScriptDatabaseInitializer]: Factory method &#39;jdbcSessionDataSourceScriptDatabaseInitializer&#39; threw exception with message: Unable to detect database type at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:326) ~[spring-beans-6.1.21.jar:6.1.21] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:205) ~[spring-beans-6.1.21.jar:6.1.21] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:954) ~[spring-context-6.1.21.jar:6.1.21] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:625) ~[spring-context-6.1.21.jar:6.1.21] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.3.13.jar:3.3.13] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-3.3.13.jar:3.3.13] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:456) ~[spring-boot-3.3.13.jar:3.3.13] at org.springframework.boot.SpringApplication.run(SpringApplication.java:335) ~[spring-boot-3.3.13.jar:3.3.13] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1363) ~[spring-boot-3.3.13.jar:3.3.13] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1352) ~[spring-boot-3.3.13.jar:3.3.13] at com.example.day0704.Day0704Application.main(Day0704Application.java:10) ~[classes/:na] Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name &#39;jdbcSessionDataSourceScriptDatabaseInitializer&#39; defined in class path resource [org/springframework/boot/autoconfigure/session/JdbcSessionConfiguration.class]: Failed to instantiate [org.springframework.boot.autoconfigure.session.JdbcSessionDataSourceScriptDatabaseInitializer]: Factory method &#39;jdbcSessionDataSourceScriptDatabaseInitializer&#39; threw exception with message: Unable to detect database type at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:648) ~[spring-beans-6.1.21.jar:6.1.21] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:636) ~[spring-beans-6.1.21.jar:6.1.21] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1355) ~[spring-beans-6.1.21.jar:6.1.21] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1185) ~[spring-beans-6.1.21.jar:6.1.21] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:562) ~[spring-beans-6.1.21.jar:6.1.21] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:522) ~[spring-beans-6.1.21.jar:6.1.21] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:337) ~[spring-beans-6.1.21.jar:6.1.21] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.1.21.jar:6.1.21] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:335) ~[spring-beans-6.1.21.jar:6.1.21] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.1.21.jar:6.1.21] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:313) ~[spring-beans-6.1.21.jar:6.1.21] ... 10 common frames omitted Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.session.JdbcSessionDataSourceScriptDatabaseInitializer]: Factory method &#39;jdbcSessionDataSourceScriptDatabaseInitializer&#39; threw exception with message: Unable to detect database type at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:178) ~[spring-beans-6.1.21.jar:6.1.21] at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:644) ~[spring-beans-6.1.21.jar:6.1.21] ... 20 common frames omitted Caused by: java.lang.IllegalStateException: Unable to detect database type at org.springframework.util.Assert.state(Assert.java:76) ~[spring-core-6.1.21.jar:6.1.21] at org.springframework.boot.jdbc.init.PlatformPlaceholderDatabaseDriverResolver.determinePlatform(PlatformPlaceholderDatabaseDriverResolver.java:133) ~[spring-boot-3.3.13.jar:3.3.13] at org.springframework.boot.jdbc.init.PlatformPlaceholderDatabaseDriverResolver.lambda$resolveAll$0(PlatformPlaceholderDatabaseDriverResolver.java:97) ~[spring-boot-3.3.13.jar:3.3.13] at org.springframework.boot.jdbc.init.PlatformPlaceholderDatabaseDriverResolver.resolveAll(PlatformPlaceholderDatabaseDriverResolver.java:122) ~[spring-boot-3.3.13.jar:3.3.13] at org.springframework.boot.jdbc.init.PlatformPlaceholderDatabaseDriverResolver.resolveAll(PlatformPlaceholderDatabaseDriverResolver.java:97) ~[spring-boot-3.3.13.jar:3.3.13] at org.springframework.boot.autoconfigure.session.JdbcSessionDataSourceScriptDatabaseInitializer.resolveSchemaLocations(JdbcSessionDataSourceScriptDatabaseInitializer.java:86) ~[spring-boot-autoconfigure-3.3.13.jar:3.3.13] at org.springframework.boot.autoconfigure.session.JdbcSessionDataSourceScriptDatabaseInitializer.getSettings(JdbcSessionDataSourceScriptDatabaseInitializer.java:74) ~[spring-boot-autoconfigure-3.3.13.jar:3.3.13] at org.springframework.boot.autoconfigure.session.JdbcSessionDataSourceScriptDatabaseInitializer.<init>(JdbcSessionDataSourceScriptDatabaseInitializer.java:48) ~[spring-boot-autoconfigure-3.3.13.jar:3.3.13] at org.springframework.boot.autoconfigure.session.JdbcSessionConfiguration.jdbcSessionDataSourceScriptDatabaseInitializer(JdbcSessionConfiguration.java:65) ~[spring-boot-autoconfigure-3.3.13.jar:3.3.13] at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:580) ~[na:na] at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:146) ~[spring-beans-6.1.21.jar:6.1.21] ... 21 common frames omitted 进程已结束,退出代码为 1 如何解决以上问题
07-05
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