使用@AfterReturning spring aop时缺少参数

t5fffqht  于 2024-01-05  发布在  Spring
关注(0)|答案(1)|浏览(128)

编辑以提供MCVE。

  1. @Target(ElementType.PARAMETER)
  2. @Retention(RetentionPolicy.RUNTIME)
  3. public @interface Random {
  4. }
  1. @Target(ElementType.METHOD)
  2. @Retention(RetentionPolicy.RUNTIME)
  3. public @interface Audited {
  4. }
  1. @Target(ElementType.PARAMETER)
  2. @Retention(RetentionPolicy.RUNTIME)
  3. public @interface Tester {
  4. }
  1. package spring;
  3. import lombok.extern.slf4j.Slf4j;
  4. import org.springframework.boot.SpringApplication;
  5. import org.springframework.boot.autoconfigure.SpringBootApplication;
  6. import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
  8. @Slf4j
  9. @SpringBootApplication
  10. public class springLoader extends SpringBootServletInitializer {
  11.     public static final Class<springLoader> CLASS = springLoader.class;
  13.     public static void main(String[] args) {
  14.         try (final var context = SpringApplication.run(CLASS, args)) {
  15.             while(true){
  16.                 Thread.sleep(1000*60*60*24);
  17.             }
  18.         } catch (InterruptedException e) {
  19.             throw new RuntimeException(e);
  20.         }
  21.     }
  22. }
  1. package spring;
  3. import lombok.extern.slf4j.Slf4j;
  4. import org.springframework.web.bind.annotation.GetMapping;
  5. import org.springframework.web.bind.annotation.RequestMapping;
  6. import org.springframework.web.bind.annotation.RestController;
  8. import java.util.ArrayList;
  9. import java.util.List;
  11. @Slf4j
  12. @RestController
  13. @RequestMapping("/Inventory")
  14. public class springRest {
  15.     private List<String> info;
  17.     public springRest() {
  18.         final var strArr = new String[]{"1234", "2345", "3456", "4567", "5678"};
  19.         info = new ArrayList<>();
  20.         info.addAll(List.of(strArr));
  21.     }
  23.     @Audited
  24.     @GetMapping()
  25.     public List<String> getInfo(@Tester String permittedValues, @Random String randomValues) {
  26.         log.info("permitted {}", permittedValues);
  27.         log.info("random: {}", randomValues);
  28.         List<String> returnedValues = new ArrayList<>();
  29.         for (final var str : info) {
  30.             if (permittedValues.contains(str) || randomValues.contains(str)) {
  31.                 log.info("{}", str);
  32.                 returnedValues.add(str);
  33.             } else {
  34.                 log.info("Not permitted: {}", str);
  35.             }
  36.         }
  38.         return returnedValues;
  39.     }
  40. }
  1. package spring;
  3. import lombok.extern.slf4j.Slf4j;
  4. import org.aspectj.lang.JoinPoint;
  5. import org.aspectj.lang.annotation.AfterReturning;
  6. import org.aspectj.lang.annotation.AfterThrowing;
  7. import org.aspectj.lang.annotation.Aspect;
  8. import org.aspectj.lang.reflect.MethodSignature;
  9. import org.springframework.stereotype.Component;
  11. import java.time.LocalDate;
  12. import java.time.LocalTime;
  13. import java.util.Arrays;
  14. import java.util.LinkedHashMap;
  15. import java.util.Map;
  16. import java.util.stream.Collectors;
  18. @Component
  19. @Aspect
  20. @Slf4j
  21. public class AuditAspect {
  22.     @AfterReturning("@annotation(spring.Audited)")
  23.     public void afterReturning(JoinPoint joinPoint) {
  24.         auditHelper(joinPoint, null);
  25.     }
  27.     @AfterThrowing(pointcut = "@annotation(spring.Audited)", throwing = "ex")
  28.     public void handleException(JoinPoint joinPoint, Exception ex) {
  29.         // This advice will be executed if an exception occurs.
  30.         auditHelper(joinPoint, ex);
  31.     }
  33.     private void auditHelper(JoinPoint joinPoint, Exception ex) {
  34.         final var date = LocalDate.now();
  35.         final var time = LocalTime.now();
  37.         final var method = ((MethodSignature) joinPoint.getSignature()).getMethod();
  38.         final var methodname = method.getName();
  39.         final var args = joinPoint.getArgs();
  41.         final var arguments = Arrays.stream(args).map(Object::toString).collect(Collectors.joining(" | "));
  42.         final var base = "accessed " + methodname + " with arguments: " + arguments;
  43.         final var statement = (ex == null) ? base : base + " but failed: " + ex.getMessage();
  45.         final Map<String, Object> linkedMap = new LinkedHashMap<>();
  46.         linkedMap.put("Time", time);
  47.         linkedMap.put("Date", date);
  48.         linkedMap.put("Log", statement);
  49.         log.info(statement);
  50.     }
  51. }
  1. package spring;
  3. import org.aspectj.lang.ProceedingJoinPoint;
  4. import org.aspectj.lang.annotation.Around;
  5. import org.aspectj.lang.annotation.Aspect;
  6. import org.aspectj.lang.reflect.MethodSignature;
  7. import org.springframework.stereotype.Component;
  9. import java.lang.annotation.Annotation;
  10. import java.util.ArrayList;
  11. import java.util.Collections;
  12. import java.util.List;
  14. @Component
  15. @Aspect
  16. public class TesterAspect {
  17.     private String[] permittedValues = new String[]{"1234", "2345"};
  18.     private List<String> randomValues = new ArrayList<>(List.of("1234", "2345", "3456", "4567","5678"));
  20.     @Around("execution(* *(.., @spring.Tester (*), ..))")
  21.     public Object permittedValues(ProceedingJoinPoint pjp) throws Throwable {
  22.         final var args = pjp.getArgs();
  23.         final var annotations = ((MethodSignature) pjp.getSignature()).getMethod().getParameterAnnotations();
  25.         for (int i = 0; i < args.length; i++) {
  26.             for (Annotation annotation : annotations[i]) {
  27.                 if (annotation.annotationType() == Tester.class) {
  28.                     args[i] = String.join(",", permittedValues);
  29.                 }
  30.             }
  31.         }
  33.         Object result = pjp.proceed(args);
  34.         return result;
  35.     }
  37.     @Around("execution(* *(.., @spring.Random (*), ..))")
  38.     public Object randomValues(ProceedingJoinPoint pjp) throws Throwable {
  39.         final var args = pjp.getArgs();
  40.         final var annotations = ((MethodSignature) pjp.getSignature()).getMethod().getParameterAnnotations();
  42.         for (int i = 0; i < args.length; i++) {
  43.             for (Annotation annotation : annotations[i]) {
  44.                 if (annotation.annotationType() == Random.class) {
  45.                     Collections.shuffle(randomValues);
  46.                     args[i] = randomValues.get(0)+","+randomValues.get(1);
  47.                 }
  48.             }
  49.         }
  50.         Object result = pjp.proceed(args);
  51.         return result;
  52.     }
  53. }

下面的代码模拟了我遇到的错误。我在参数级别上为GetMapping添加了两个注解，在方法级别上添加了一个注解。两个Around方面被执行，并且在GetMapping方法中，修改后的参数被正确地注销。但是，在@AfterReturning或@AfterThrowing方面方法中，其中一个参数为null。我通过键入localhost访问了GetMapping：8080/库存到谷歌Chrome。
IDE上的堆栈跟踪为：

  1. 2023-12-06 11:39:14.938  INFO 7905 --- [nio-8080-exec-1] s.springRest                             : permitted 1234,2345
  2. 2023-12-06 11:46:17.851  INFO 8067 --- [nio-8080-exec-1] s.springRest                             : random: 3456,5678
  3. 2023-12-06 11:46:17.851  INFO 8067 --- [nio-8080-exec-1] s.springRest                             : 1234
  4. 2023-12-06 11:46:17.851  INFO 8067 --- [nio-8080-exec-1] s.springRest                             : 2345
  5. 2023-12-06 11:46:17.851  INFO 8067 --- [nio-8080-exec-1] s.springRest                             : 3456
  6. 2023-12-06 11:46:17.852  INFO 8067 --- [nio-8080-exec-1] s.springRest                             : Not permitted: 4567
  7. 2023-12-06 11:46:17.852  INFO 8067 --- [nio-8080-exec-1] s.springRest                             : 5678
  8. 2023-12-06 11:39:14.942 ERROR 7905 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[.[dispatcherServlet]      : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause
  10. java.lang.NullPointerException: null
  11.     at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[?:?]
  12.     at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992) ~[?:?]
  13.     at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?]
  14.     at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?]
  15.     at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[?:?]
  16.     at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?]
  17.     at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[?:?]
  18.     at spring.AuditAspect.auditHelper(AuditAspect.java:41) ~[classes/:?]
  19.     at spring.AuditAspect.afterReturning(AuditAspect.java:24) ~[classes/:?]
  20.     at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
  21.     at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?]
  22.     at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
  23.     at java.lang.reflect.Method.invoke(Method.java:568) ~[?:?]
  24.     at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:634) ~[spring-aop-5.3.24.jar:5.3.24]
  25.     at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:617) ~[spring-aop-5.3.24.jar:5.3.24]
  26.     at org.springframework.aop.aspectj.AspectJAfterReturningAdvice.afterReturning(AspectJAfterReturningAdvice.java:66) ~[spring-aop-5.3.24.jar:5.3.24]
  27.     at org.springframework.aop.framework.adapter.AfterReturningAdviceInterceptor.invoke(AfterReturningAdviceInterceptor.java:58) ~[spring-aop-5.3.24.jar:5.3.24]
  28.     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175) ~[spring-aop-5.3.24.jar:5.3.24]
  29.     at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763) ~[spring-aop-5.3.24.jar:5.3.24]
  30.     at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97) ~[spring-aop-5.3.24.jar:5.3.24]
  31.     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.24.jar:5.3.24]
  32.     at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763) ~[spring-aop-5.3.24.jar:5.3.24]
  33.     at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:708) ~[spring-aop-5.3.24.jar:5.3.24]
  34.     at spring.springRest$$EnhancerBySpringCGLIB$$1d14e293.getInfo(<generated>) ~[classes/:?]
  35.     at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
  36.     at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?]
  37.     at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
  38.     at java.lang.reflect.Method.invoke(Method.java:568) ~[?:?]
  39.     at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-5.3.24.jar:5.3.24]
  40.     at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150) ~[spring-web-5.3.24.jar:5.3.24]
  41.     at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117) ~[spring-webmvc-5.3.24.jar:5.3.24]
  42.     at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.3.24.jar:5.3.24]
  43.     at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.24.jar:5.3.24]
  44.     at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.24.jar:5.3.24]
  45.     at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1071) ~[spring-webmvc-5.3.24.jar:5.3.24]
  46.     at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:964) ~[spring-webmvc-5.3.24.jar:5.3.24]
  47.     at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.24.jar:5.3.24]
  48.     at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.24.jar:5.3.24]
  49.     at javax.servlet.http.HttpServlet.service(HttpServlet.java:670) ~[tomcat-embed-core-9.0.70.jar:4.0.FR]
  50.     at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.24.jar:5.3.24]
  51.     at javax.servlet.http.HttpServlet.service(HttpServlet.java:779) ~[tomcat-embed-core-9.0.70.jar:4.0.FR]
  52.     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.70.jar:9.0.70]
  53.     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.70.jar:9.0.70]
  54.     at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.70.jar:9.0.70]
  55.     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.70.jar:9.0.70]
  56.     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.70.jar:9.0.70]
  57.     at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.24.jar:5.3.24]
  58.     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.24.jar:5.3.24]
  59.     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.70.jar:9.0.70]
  60.     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.70.jar:9.0.70]
  61.     at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.24.jar:5.3.24]
  62.     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.24.jar:5.3.24]
  63.     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.70.jar:9.0.70]
  64.     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.70.jar:9.0.70]
  65.     at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.24.jar:5.3.24]
  66.     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.24.jar:5.3.24]
  67.     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.70.jar:9.0.70]
  68.     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.70.jar:9.0.70]
  69.     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:177) [tomcat-embed-core-9.0.70.jar:9.0.70]
  70.     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) [tomcat-embed-core-9.0.70.jar:9.0.70]
  71.     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) [tomcat-embed-core-9.0.70.jar:9.0.70]
  72.     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) [tomcat-embed-core-9.0.70.jar:9.0.70]
  73.     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.70.jar:9.0.70]
  74.     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) [tomcat-embed-core-9.0.70.jar:9.0.70]
  75.     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360) [tomcat-embed-core-9.0.70.jar:9.0.70]
  76.     at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399) [tomcat-embed-core-9.0.70.jar:9.0.70]
  77.     at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.70.jar:9.0.70]
  78.     at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:891) [tomcat-embed-core-9.0.70.jar:9.0.70]
  79.     at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1784) [tomcat-embed-core-9.0.70.jar:9.0.70]
  80.     at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.70.jar:9.0.70]
  81.     at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) [tomcat-embed-core-9.0.70.jar:9.0.70]
  82.     at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) [tomcat-embed-core-9.0.70.jar:9.0.70]
  83.     at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.70.jar:9.0.70]
  84.     at java.lang.Thread.run(Thread.java:840) [?:?]

型
使用的pom.xml如下，但分发管理模糊。

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <project xmlns="http://maven.apache.org/POM/4.0.0"
  3.          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  4.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  5.     <modelVersion>4.0.0</modelVersion>
  7.     <groupId>org.example</groupId>
  8.     <artifactId>demo</artifactId>
  9.     <version>1.0-SNAPSHOT</version>
  11.     <properties>
  12.         <maven.compiler.source>17</maven.compiler.source>
  13.         <maven.compiler.target>17</maven.compiler.target>
  14.         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  15.     </properties>
  17.     <dependencies>
  18.         <dependency>
  19.             <groupId>org.springframework</groupId>
  20.             <artifactId>spring-web</artifactId>
  21.             <version>5.3.24</version>
  22.         </dependency>
  23.         <dependency>
  24.             <groupId>org.springframework.boot</groupId>
  25.             <artifactId>spring-boot-starter-web</artifactId>
  26.             <version>2.7.7</version>
  27.             <exclusions>
  28.                 <exclusion>
  29.                     <groupId>org.springframework.boot</groupId>
  30.                     <artifactId>spring-boot-starter-logging</artifactId>
  31.                 </exclusion>
  32.             </exclusions>
  33.         </dependency>
  34.         <dependency>
  35.             <groupId>org.springframework.boot</groupId>
  36.             <artifactId>spring-boot-starter-data-jpa</artifactId>
  37.             <version>2.7.7</version>
  38.         </dependency>
  39.         <dependency>
  40.             <groupId>org.springframework.boot</groupId>
  41.             <artifactId>spring-boot-starter-log4j2</artifactId>
  42.             <version>2.7.7</version>
  43.             <exclusions>
  44.                 <exclusion>
  45.                     <groupId>org.apache.logging.log4j</groupId>
  46.                     <artifactId>log4j-slf4j-impl</artifactId>
  47.                 </exclusion>
  48.             </exclusions>
  49.         </dependency>
  50.         <dependency>
  51.             <groupId>org.apache.logging.log4j</groupId>
  52.             <artifactId>log4j-slf4j2-impl</artifactId>
  53.             <version>2.20.0</version>
  54.         </dependency>
  55.         <dependency>
  56.             <groupId>org.apache.logging.log4j</groupId>
  57.             <artifactId>log4j-api</artifactId>
  58.             <version>2.20.0</version>
  59.         </dependency>
  60.         <dependency>
  61.             <groupId>org.apache.logging.log4j</groupId>
  62.             <artifactId>log4j-core</artifactId>
  63.             <version>2.20.0</version>
  64.         </dependency>
  65.         <dependency>
  66.             <groupId>org.projectlombok</groupId>
  67.             <artifactId>lombok</artifactId>
  68.             <version>1.18.24</version>
  69.             <scope>compile</scope>
  70.         </dependency>
  71.         <dependency>
  72.             <groupId>javax.xml.bind</groupId>
  73.             <artifactId>jaxb-api</artifactId>
  74.             <version>2.4.0-b180830.0359</version>
  75.         </dependency>
  76.         <dependency>
  77.             <groupId>com.h2database</groupId>
  78.             <artifactId>h2</artifactId>
  79.             <version>2.1.214</version>
  80.             <scope>runtime</scope>
  81.         </dependency>
  82.     </dependencies>
  84.     <build>
  85.         <plugins>
  86.             <plugin>
  87.                 <groupId>org.apache.maven.plugins</groupId>
  88.                 <artifactId>maven-surefire-plugin</artifactId>
  89.                 <version>2.22.2</version>
  90.             </plugin>
  91.         </plugins>
  92.     </build>
  94.     <distributionManagement>
  95.         <repository>
  96.             <id>nexus-es</id>
  97.             <name>Internal Release Repository</name>
  98.             <url>https://nexus/repository/my-docker/</url>
  99.             <layout>default</layout>
  100.         </repository>
  101.         <snapshotRepository>
  102.             <id>nexus-snapshot</id>
  103.             <name>Internal Snapshot Repository</name>
  104.             <url>https://nexus/repository/snapshot/</url>
  105.         </snapshotRepository>
  106.     </distributionManagement>
  107. </project>

型

spring

1条答案

按热度按时间
dphi5xsq

dphi5xsq1#

您的错误只是发生了，因为AuditAspect::auditHelper中的代码并不期望Arrays.stream(args).map(Object::toString)可以包含null元素，但它确实包含了，这会使后续的.collect(Collectors.joining(" | "))调用脱轨。
如果将.map(Object::toString)替换为.map(o -> o == null ? "null" : o.toString())，则审计方面可以正常工作。应用程序将记录如下内容：

  1. springRest          : permitted 1234,2345
  2. springRest          : random: 1234,2345
  3. springRest          : 1234
  4. springRest          : 2345
  5. springRest          : Not permitted: 3456
  6. springRest          : Not permitted: 4567
  7. springRest          : 5678
  8. AuditAspect         : accessed getInfo with arguments: 1234,2345 | null

字符串
为什么第二个参数为null？你可能会期望它是类似于“2345，5678”的东西，因为你对Spring AOP的工作原理有一个错误的想法。虽然在两个around advice的情况下，内部的可以看到外部的输入参数变化，after通知显然不能。它看起来像是看到了传入最里面的around通知的参数，而不是后者传递给目标方法的参数。
实际上，在Spring AOP和AOP J中，继续的语义看起来是不同的。（可能已更改）参数传递到目标方法，而在原生ANOJ中，只有当它们与args绑定时才能传递更改的参数，这就不那么灵活了。当比较两者时，我实际上也很惊讶，这是不一样的，因为在许多其他方面，Spring AOP试图模仿原生AOP J。
现在关注Spring AOP，您将TesterAspect中最内层的around通知的参数传递给AuditAspect的解决方法是将after通知转换为around通知。
您还需要确保TesterAspect的方面优先级高于AuditAspect，也就是说，您将@Order(1)注解放在TesterAspect上，并将@Order(2)注解放在AuditAspect上。数字越小，优先级越高。优先级越高，意味着proceed()之前和之后的所有内容都比优先级较低的方面执行得更早。这就是您想要的，因为您想要在方法执行之后进行审计，并且在继续进行审计方面之前，tester方面应该已经完成了它的魔术，操纵它的输入参数。

  1. @Component
  2. @Aspect
  3. @Order(1)
  4. public class TesterAspect {
  5.   // ...
  6. }
  1. package de.scrum_master.spring.q77576228;
  3. import lombok.extern.slf4j.Slf4j;
  4. import org.aspectj.lang.JoinPoint;
  5. import org.aspectj.lang.ProceedingJoinPoint;
  6. import org.aspectj.lang.annotation.Around;
  7. import org.aspectj.lang.annotation.Aspect;
  8. import org.aspectj.lang.reflect.MethodSignature;
  9. import org.springframework.core.annotation.Order;
  10. import org.springframework.stereotype.Component;
  12. import java.lang.reflect.Method;
  13. import java.time.LocalDate;
  14. import java.time.LocalTime;
  15. import java.util.Arrays;
  16. import java.util.LinkedHashMap;
  17. import java.util.Map;
  18. import java.util.stream.Collectors;
  20. @Component
  21. @Aspect
  22. @Slf4j
  23. @Order(2)
  24. public class AuditAspect {
  25.   @Around("@annotation(Audited)")
  26.   public Object auditHelper(ProceedingJoinPoint pjp) throws Throwable {
  27.     try {
  28.       Object result = pjp.proceed();
  29.       auditHelper(pjp, null);
  30.       return result;
  31.     } catch (Exception e) {
  32.       auditHelper(pjp, e);
  33.       throw e;
  34.     }
  35.   }
  37.   private void auditHelper(JoinPoint joinPoint, Exception ex) {
  38.     LocalDate date = LocalDate.now();
  39.     LocalTime time = LocalTime.now();
  41.     Method method = ((MethodSignature) joinPoint.getSignature()).getMethod();
  42.     String methodname = method.getName();
  43.     Object[] args = joinPoint.getArgs();
  45.     String arguments = Arrays.stream(args)
  46.       .map(o -> o == null ? "null" : o.toString())
  47.       .collect(Collectors.joining(" | "));
  48.     String base = "accessed " + methodname + " with arguments: " + arguments;
  49.     String statement = (ex == null) ? base : base + " but failed: " + ex.getMessage();
  51.     Map<String, Object> linkedMap = new LinkedHashMap<>();
  52.     linkedMap.put("Time", time);
  53.     linkedMap.put("Date", date);
  54.     linkedMap.put("Log", statement);
  55.     log.info(statement);
  56.   }
  57. }

的数据
控制台日志将更改为：

  1. springRest          : permitted 1234,2345
  2. springRest          : random: 1234,2345
  3. springRest          : 1234
  4. springRest          : 2345
  5. springRest          : Not permitted: 3456
  6. springRest          : Not permitted: 4567
  7. springRest          : 5678
  8. AuditAspect         : accessed getInfo with arguments: 1234,2345 | 1234,5678

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