【发布时间】：2020-01-07 11:53:38
【问题描述】：
目前我正在使用 AspectJ 加载时间编织来拦截基础实体的构造函数以进行审计。然而，在运行应用程序时，我得到了令人难以置信的不一致结果，这些结果围绕 aspectJ 编织到 LTW 类中的 aspectOf() 方法。
在某些情况下，应用程序运行，编织正确完成，代码按预期运行。其他时候我会遇到：
java.lang.NoSuchMethodException: ca.gc.cfp.core.cfpws.repository.aspect.BaseEntityAspect.aspectOf()
目前我正在使用 https://github.com/subes/invesdwin-instrument 将检测代理动态附加到 JVM，因此我们的部署人员不需要进行任何额外的配置。
我的 Spring 应用主程序：
@SpringBootApplication
@EntityScan(basePackages = {"ca.gc.cfp.model"})
public class CfpWsApplication {
public static void main(final String[] args) {
DynamicInstrumentationLoader.waitForInitialized();
DynamicInstrumentationLoader.initLoadTimeWeavingContext();
if (!InstrumentationLoadTimeWeaver.isInstrumentationAvailable()) {
throw new IllegalStateException(
"Instrumentation is not available AspectJ weaver will not function.");
}
SpringApplication.run(CfpWsApplication.class, args);
}
LTW 方面：
@Aspect
public class BaseEntityAspect {
Logger logger = LoggerFactory.getLogger(BaseEntityAspect.class);
/** Application context property needed to fetch the AuditDate bean */
@Autowired private ApplicationContext context;
@AfterReturning(
"onBaseEntityCreated() && !within(ca.gc.cfp.core.cfpws.repository.aspect.BaseEntityAspect)")
public void injectAuditTimeStamp(JoinPoint joinPoint) {
try {
AuditDate auditDate = context.getBean(AuditDate.class);
Object entityTarget = joinPoint.getTarget();
// Inject the auditing date for this Entity instance
if (entityTarget instanceof BaseEntity) {
BaseEntity baseEnt = (BaseEntity) entityTarget;
baseEnt.setAuditDate(auditDate.getAuditingTimeStamp());
}
} catch (NullPointerException e) {
logger.error(
e.getMessage()
+ " Not yet in the conext of an httpRequest, the AuditDate bean has not yet been instantiated.");
}
}
@Pointcut(
"execution(ca.gc.cfp.model.entity.BaseEntity.new(..)) && !within(ca.gc.cfp.core.cfpws.repository.aspect.BaseEntityAspect)")
public void onBaseEntityCreated() {}
}
具有临时工厂方法的 Aspect 配置类使用 Aspects 实用程序让 spring 知道它应该向 aspectJ 询问编织的 Aspect：
@Configuration
@EnableAspectJAutoProxy
public class AspectConfig {
/**
* Static factory for access to the load time woven aspect. This allows the aspect to be injected
* with the application context and beans from the spring IoC
*/
@Bean
public BaseEntityAspect getBaseEntityAspect() {
return Aspects.aspectOf(BaseEntityAspect.class);
}
}
aop.xml：
<aspectj>
<weaver options="-verbose -showWeaveInfo -Xreweavable -debug">
<include within="ca.gc.cfp.model" />
<include within="ca.gc.cfp.model..*" />
<include within="ca.gc.cfp.core.cfpws.repository.aspect..*"/>
</weaver>
<aspects>
<aspect name="ca.gc.cfp.core.cfpws.repository.aspect.BaseEntityAspect" />
</aspects>
</aspectj>
在很多情况下，当我使用此配置运行时，我会得到以下信息：
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [ca.gc.cfp.core.cfpws.repository.aspect.BaseEntityAspect]: Factory method 'getBaseEntityAspect' threw exception; nested exception is org.aspectj.lang.NoAspectBoundException: Exception while initializing ca.gc.cfp.core.cfpws.repository.aspect.BaseEntityAspect: java.lang.NoSuchMethodException: ca.gc.cfp.core.cfpws.repository.aspect.BaseEntityAspect.aspectOf()
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
... 19 common frames omitted
Caused by: org.aspectj.lang.NoAspectBoundException: Exception while initializing ca.gc.cfp.core.cfpws.repository.aspect.BaseEntityAspect: java.lang.NoSuchMethodException: ca.gc.cfp.core.cfpws.repository.aspect.BaseEntityAspect.aspectOf()
at org.aspectj.lang.Aspects.aspectOf(Aspects.java:50) ~[aspectjrt-1.9.4.jar:1.9.4]
at ca.gc.cfp.core.cfpws.configuration.AspectConfig.getBaseEntityAspect(AspectConfig.java:22) ~[classes/:na]
at ca.gc.cfp.core.cfpws.configuration.AspectConfig$$EnhancerBySpringCGLIB$$1cae4c58.CGLIB$getBaseEntityAspect$0(<generated>) ~[classes/:na]
at ca.gc.cfp.core.cfpws.configuration.AspectConfig$$EnhancerBySpringCGLIB$$1cae4c58$$FastClassBySpringCGLIB$$84edb9e.invoke(<generated>) ~[classes/:na]
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) ~[spring-core-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) ~[spring-context-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at ca.gc.cfp.core.cfpws.configuration.AspectConfig$$EnhancerBySpringCGLIB$$1cae4c58.getBaseEntityAspect(<generated>) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_211]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_211]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_211]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_211]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
... 20 common frames omitted
Caused by: java.lang.NoSuchMethodException: ca.gc.cfp.core.cfpws.repository.aspect.BaseEntityAspect.aspectOf()
at java.lang.Class.getDeclaredMethod(Class.java:2130) ~[na:1.8.0_211]
at org.aspectj.lang.Aspects.getSingletonOrThreadAspectOf(Aspects.java:134) ~[aspectjrt-1.9.4.jar:1.9.4]
at org.aspectj.lang.Aspects.aspectOf(Aspects.java:45) ~[aspectjrt-1.9.4.jar:1.9.4]
... 31 common frames omitted
但情况并非总是如此，有时应用程序运行良好，代码按预期执行并且没有问题。这已经困扰我几个星期了，我似乎无法弄清楚是什么导致这段代码偶尔工作，偶尔不工作。会不会是 CGLIB 代理对编译器隐藏了 aspectOf() 方法？？
编辑/更新：我能够删除使用上述第三方依赖项将 java 代理动态加载到 Spring 应用程序上下文中。我改为使用 javaagent 参数，它在我的 IDE 中运行良好。但是，在终端中通过 Maven 构建和运行仍然会导致问题。我已经通过环境变量指定了 javaagent 参数：MAVEN_OPTS。这样做之后，maven 似乎正在接受它，但我的课程仍然没有被编织。
【问题讨论】：
-
或者您的 IDE 构建和 maven 构建相互冲突？一个配置正确，一个不正确？
标签： java spring spring-boot aspectj load-time-weaving