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我經歷了所有嘗試使我的項目在Tomcat上運行的可能性，並且使用AspectJ Load Time Weaver編寫了模型（getter）並將它們編織在一起。 基本上，我遵循Spring Documentation http://docs.spring.io/spring/docs/current/spring-framework-reference/html/aop.html#aop-atconfigurable中的所有步驟。我也遵循了Lazy/Eager loading/fetching in Neo4j/Spring-Data提到的相同方法。 我的項目分爲兩個主要項目： - 核心：spring-data-neo4j（存儲庫和配置），專用包中的域模型，LoggingAspect和LazyLoadingAspect。附：我沒有在XML文件中使用任何配置。我純粹使用Annotation。 - 內容：在Tomcat上運行的Web應用程序，它依賴於核心項目，當我調用域項目中的getter方法時，我想編織它。使用Spring Data進行延遲加載Neo4j 4 +在Tomcat上運行的AspectJ LTW
運行核心本身我設法使用maven插件運行，並添加了aspectj的依賴關係。但是當我搬到Tomcat時，所有的事情都開始了。我嘗試了所有的可能性，例如使用-javaagent，創建自定義的context.xml，把春天的儀器放到tomcat/lib文件夾，等等等等，我收到以下異常：
java.lang.IllegalStateException: Post-processor tried to replace bean instance of type [com.test.server.graph.domain.model.Sequence] with (proxy) object of type [org.springframework.beans.factory.aspectj.$Proxy96] - not supported for aspect-configured classes!
at org.springframework.beans.factory.wiring.BeanConfigurerSupport.checkExposedObject(BeanConfigurerSupport.java:173)
at org.springframework.beans.factory.wiring.BeanConfigurerSupport.configureBean(BeanConfigurerSupport.java:143)
at org.springframework.beans.factory.aspectj.AnnotationBeanConfigurerAspect.configureBean(AnnotationBeanConfigurerAspect.aj:63)
at org.springframework.beans.factory.aspectj.AbstractDependencyInjectionAspect.ajc$afterReturning$org_springframework_beans_factory_aspectj_AbstractDependencyInjectionAspect$2$1ea6722c(AbstractDependencyInjectionAspect.aj:88)
at com.test.server.graph.domain.model.Sequence.(Sequence.java:29)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
at org.neo4j.ogm.annotations.EntityFactory.instantiate(EntityFactory.java:135)
at org.neo4j.ogm.annotations.EntityFactory.instantiateObjectFromTaxa(EntityFactory.java:110)
at org.neo4j.ogm.annotations.EntityFactory.newObject(EntityFactory.java:61)
at org.neo4j.ogm.context.GraphEntityMapper.mapNodes(GraphEntityMapper.java:147)
at org.neo4j.ogm.context.GraphEntityMapper.mapEntities(GraphEntityMapper.java:132)
at org.neo4j.ogm.context.GraphEntityMapper.map(GraphEntityMapper.java:107)
at org.neo4j.ogm.context.GraphEntityMapper.map(GraphEntityMapper.java:102)
at org.neo4j.ogm.context.RestModelMapper.mapEntity(RestModelMapper.java:157)
at org.neo4j.ogm.context.RestModelMapper.map(RestModelMapper.java:76)
at org.neo4j.ogm.session.delegates.ExecuteQueriesDelegate.query(ExecuteQueriesDelegate.java:94)
at org.neo4j.ogm.session.delegates.ExecuteQueriesDelegate.query(ExecuteQueriesDelegate.java:73)
at org.neo4j.ogm.session.Neo4jSession.query(Neo4jSession.java:313)
at org.springframework.data.neo4j.template.Neo4jTemplate.query(Neo4jTemplate.java:217)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:302)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208)
at com.sun.proxy.$Proxy58.query(Unknown Source)
的pom.xml（核心的.project）
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-neo4j</artifactId>
<version>${sdn.version}</version>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-ogm-core</artifactId>
<version>2.0.3-SNAPSHOT</version>
</dependency>
我的配置類（核項目）
@org.springframework.context.annotation.Configuration
@ComponentScan(basePackages = "org.test.server.graph")
@EnableNeo4jRepositories(basePackages = "org.test.server.graph.repository")
@EnableAspectJAutoProxy
@EnableSpringConfigured
public class Neo4jConfig extends Neo4jConfiguration {
@Bean
public Configuration getConfiguration() {
Configuration config = new Configuration();
config.driverConfiguration().setDriverClassName("org.neo4j.ogm.drivers.http.driver.HttpDriver")
.setURI(System.getProperty("neo4j.host")).setCredentials(System.getProperty("neo4j.user"),System.getProperty("neo4j.password"));
return config;
}
@Bean
public SessionFactory getSessionFactory() {
return new SessionFactory(getConfiguration(), "org.test.server.graph.domain");
}
@Bean
@Scope(value = "prototype")
public Session getSession() throws Exception {
return super.getSession();
}
}
域模型類
所推薦的Spring文檔註釋我中的類領域模型
@Configurable
MVC-調度員的servlet（webapp項目）
<context:spring-configured />
<context:load-time-weaver aspectj-weaving="on" weaver-class="org.springframework.instrument.classloading.tomcat.TomcatLoadTimeWeaver" />
我嘗試使用tomcat-maven-plugin和tomcat獨立安裝（v7和v8）運行。
- 更新 -
Sequence.java
@NodeEntity
@Configurable
public class Sequence extends DatabaseObject {
@Relationship(type = "hasModifiedResidue", direction = Relationship.OUTGOING)
private List<AbstractModifiedResidue> hasModifiedResidue;
@Relationship(type = "referenceEntity", direction = Relationship.OUTGOING)
private ReferenceSequence referenceEntity;
public Sequence() {}
//getter and setters
}
DatabaseObject.java
@NodeEntity
@Configurable(
preConstruction = false
)
public abstract class DatabaseObject implements Serializable, Comparable<DatabaseObject> {
@GraphId
private Long id;
// other common attributes + getter and setters, no more annotation
LazyLoadingAspect
@Aspect
@Component
public class LazyFetchAspect {
@Autowired
private Neo4jOperations neo4jTemplate;
@Around("modelGetter()")
public Object autoFetch(ProceedingJoinPoint pjp) throws Throwable {
System.out.println(" Testing Aspect ");
return pjp.proceed();
}
@Pointcut("execution(public * com.test.server.graph.domain.model.*.get*(..))")
public void modelGetter() {
}
}
我的猜測是，AspectJ裝載時織不工作，當你在Tomcat下運行的東西。我認爲你應該驗證加載時織入確實生效並修復配置，直到它完成。你也可以考慮使用編譯時編織（你可以用maven來完成，你也可以讓Eclipse使用AspectJ編譯器）。我在編譯時編織時使用'@ Configurable'取得了巨大的成功。嘗試使用'-javaagent'虛擬機參數運行Tomcat JVM。 –
此外，您應該爲AspectJ加載時織機啓用調試日誌記錄，以便您可以真正看到它在做什麼。有關如何執行此操作的詳細信息，請參閱我的[回覆]（http://stackoverflow.com/a/35224749/2699901）上一個無關的問題。 –
@NándorElődFekete。核心項目本身在運行，我可以在執行時看到輸出「測試方面」。你需要考慮兩件事，我運行的IntelliJ應該不是問題，我正在使用-javaagent運行tomcat。我將啓用調試日誌記錄，我會提出更新。乾杯。 – Gui