Spring AOP的日誌記錄攔截器和JAXB問題

Question

我想實現測井方面爲我的應用程序。這是我第一次嘗試AOP，所以請讓我知道我是否缺少明顯的東西。爲了實現編織外部罐子，我試圖實現加載時間織布工。我在我的應用程序上下文中指定了加載時間編織器，並在我的context.xml文件中提到了TomcatInstrumentableClassLoader以及aop.xml。我的應用程序是Spring MVC REST應用程序，並且也使用JAXB內容協商。在應用程序啓動過程中，從我提到的類構建JAXBContext的同時，JAXB會發生空指針異常。但是，如果沒有TomcatInstrumentableClassLoader，則JAXBContext會正常初始化，並且一切正常。但是，沒有TomcatInstrumentableClassLoader加載時間，編織將不起作用。有什麼我可以解決這個問題嗎？任何幫助是極大的讚賞。

我的應用程序上下文：

.... 
    <aop:aspectj-autoproxy/> 
    <context:load-time-weaver aspectj-weaving="on" /> 
    ..... 
    <oxm:jaxb2-marshaller id="jaxb2Marshaller"> 
    <oxm:class-to-be-bound name="core.jaxb.DocPackage"/> 
    <oxm:class-to-be-bound name="core.jaxb.life.Life"/> 
    <oxm:class-to-be-bound name="core.jaxb.corr.Corr"/> 
    <oxm:class-to-be-bound name="core.jaxb.ps.PS"/> 
</oxm:jaxb2-marshaller> 

這裏是我的context.xml：

<?xml version="1.0" encoding="UTF-8"?> 
    <Context> 
<Loader loaderClass="org.springframework.instrument.classloading.tomcat.TomcatInstrumentableClassLoader" useSystemClassLoaderAsParent="false"/> 
</Context> 

我aop.xml文件：

 <!DOCTYPE aspectj PUBLIC 
    "-//AspectJ//DTD//EN" "http://www.eclipse.org/aspectj/dtd/aspectj.dtd"> 
    <aspectj> 
<weaver> 
    <!-- only weave classes in our application-specific packages --> 
    <include within="core.aspects.*"/> 
</weaver> 
<aspects> 
    <!-- weave in just this aspect -->   
    <aspect name="core.aspects.LoggerAspect"/> 
</aspects> 

這裏是堆棧跟蹤：

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jaxb2Marshaller': Invocation of init method failed; nested exception is java.lang.NullPointerException 
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1420) 
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519) 
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) 
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291) 
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) 
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288) 
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190) 
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:844) 
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:786) 
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:703) 
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:478) 
... 23 more 
    Caused by: java.lang.NullPointerException 
at java.util.EnumMap.<init>(EnumMap.java:113) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeEnumLeafInfoImpl.<init>(RuntimeEnumLeafInfoImpl.java:72) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.createEnumLeafInfo(RuntimeModelBuilder.java:94) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.createEnumLeafInfo(RuntimeModelBuilder.java:70) 
at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getClassInfo(ModelBuilder.java:213) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:89) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:70) 
at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getClassInfo(ModelBuilder.java:198) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:84) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:70) 
at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getTypeInfo(ModelBuilder.java:304) 
at com.sun.xml.internal.bind.v2.model.impl.SingleTypePropertyInfoImpl.getTarget(SingleTypePropertyInfoImpl.java:79) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeValuePropertyInfoImpl.getTarget(RuntimeValuePropertyInfoImpl.java:55) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeValuePropertyInfoImpl.getTarget(RuntimeValuePropertyInfoImpl.java:39) 
at com.sun.xml.internal.bind.v2.model.impl.SingleTypePropertyInfoImpl.ref(SingleTypePropertyInfoImpl.java:73) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeValuePropertyInfoImpl.ref(RuntimeValuePropertyInfoImpl.java:59) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeValuePropertyInfoImpl.ref(RuntimeValuePropertyInfoImpl.java:39) 
at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getClassInfo(ModelBuilder.java:244) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:89) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:70) 
at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getClassInfo(ModelBuilder.java:198) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:84) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:70) 
at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getTypeInfo(ModelBuilder.java:304) 
at com.sun.xml.internal.bind.v2.model.impl.TypeRefImpl.calcRef(TypeRefImpl.java:81) 
at com.sun.xml.internal.bind.v2.model.impl.TypeRefImpl.getTarget(TypeRefImpl.java:58) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeTypeRefImpl.getTarget(RuntimeTypeRefImpl.java:47) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeTypeRefImpl.getTarget(RuntimeTypeRefImpl.java:40) 
at com.sun.xml.internal.bind.v2.model.impl.ElementPropertyInfoImpl$1.get(ElementPropertyInfoImpl.java:63) 
at com.sun.xml.internal.bind.v2.model.impl.ElementPropertyInfoImpl$1.get(ElementPropertyInfoImpl.java:61) 
at java.util.AbstractList$Itr.next(AbstractList.java:345) 
at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getClassInfo(ModelBuilder.java:244) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:89) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:70) 
at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getClassInfo(ModelBuilder.java:198) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:84) 
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:70) 
at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getTypeInfo(ModelBuilder.java:304) 
at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getTypeInfo(ModelBuilder.java:319) 
at com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl.getTypeInfoSet(JAXBContextImpl.java:430) 
at com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:277) 
at com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(JAXBContextImpl.java:1100) 
at com.sun.xml.internal.bind.v2.ContextFactory.createContext(ContextFactory.java:143) 
at com.sun.xml.internal.bind.v2.ContextFactory.createContext(ContextFactory.java:110) 
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
at java.lang.reflect.Method.invoke(Method.java:597) 
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:202) 
at javax.xml.bind.ContextFinder.find(ContextFinder.java:376) 
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:574) 
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:522) 
at org.springframework.oxm.jaxb.Jaxb2Marshaller.createJaxbContextFromClasses(Jaxb2Marshaller.java:372) 
at org.springframework.oxm.jaxb.Jaxb2Marshaller.getJaxbContext(Jaxb2Marshaller.java:331) 
at org.springframework.oxm.jaxb.Jaxb2Marshaller.afterPropertiesSet(Jaxb2Marshaller.java:317) 
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1477) 
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1417) 
... 33 more 

Answer 1

哇 - 大量的執行日誌記錄的！以下是我已經習慣了巨大的成功策略：

1. 創建了AspectJ @Aspect註解的一個方面，和Spring @Component註解，作爲一個使得它一個方面，後者使得一個Spring bean
2. 啓用通過配置Speing AOP命名空間，然後設置<aop:aspectj-autoproxy>
3. 創建方面的方法，用@Around註釋，以便它之前和處理方法執行後運行在您的應用程序方面。配置方法在你的控制器封裝爲類只運行，就像這樣：@Around("execution(* com.mycontrollerpackage.(.*(..))")

現在你有運行之前和方法執行後，可以讓你記錄有關請求的信息，從什麼來傳遞一個方面需要多長時間。你也可以執行安全檢查，設置變量ThreadLocal來指導執行等各種好東西。