在 Tomcat 上使用 Spring Data Neo4j 4 + AspectJ LTW 运行 延迟加载
Lazy Loading using Spring Data Neo4j 4 + AspectJ LTW running on Tomcat
我经历了所有尝试在 Tomcat 上制作我的项目 运行 并点切模型 (getters) 并使用 AspectJ Load Time Weaver 编织它们的可能性。
基本上，我遵循了 Spring 文档 http://docs.spring.io/spring/docs/current/spring-framework-reference/html/aop.html#aop-atconfigurable. I also followed the same approach mentioned Lazy/Eager loading/fetching in Neo4j/Spring-Data 中的所有步骤。
我的项目分为两个主要项目：
- 核心：spring-data-neo4j（存储库和配置）、专用包中的域模型、LoggingAspect 和 LazyLoadingAspect。 p.s。我没有在 XML 文件中使用任何配置。我纯粹是在使用注释。
- 内容：Tomcat 上的 Web 应用程序 运行 取决于核心项目，我想在域项目中调用 getter 方法时编织。
运行 核心本身我设法得到它 运行 使用 maven 插件并添加 aspectj 的依赖项。但是当我移动到 Tomcat 时，一切都开始了。我尝试了所有的可能性，例如使用 -javaagent，创建自定义 context.xml，将 spring-instrument 放入 tomcat/lib 文件夹等。我收到以下异常：
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_AbstractDependencyInjectionAspectea6722c(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)
pom.xml (core.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class（核心项目）
@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();
}
}
领域模型classes
根据 Spring 文档的建议，我在领域模型 class 中注释了
@Configurable
mvc-dispatcher-servlet（webapp 项目）
<context:spring-configured />
<context:load-time-weaver aspectj-weaving="on" weaver-class="org.springframework.instrument.classloading.tomcat.TomcatLoadTimeWeaver" />
我尝试 运行 使用 tomcat-maven-plugin 和 tomcat 独立安装（v7 和 v8）。
-- 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() {
}
}
主要问题似乎是您正在将方面应用到 bean：
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.$Proxy96] - not supported for aspect-configured classes!
这行不通，因此您必须确保您的模型 类 是真正的 POJO 而不是 beans，并将它们从 spring 中排除。 （确保在 domain.model.* 中没有 spring 注释）- 也许如果你 post 你的 Sequence.java 我可以看到可能导致冲突的原因。
另一方面，您必须确保只将 aspectj 分配给模型而不是任何 bean。所以确保你有一个只包含你的 pojo 模型的 /META-INF/aop.xml:
<!DOCTYPE aspectj PUBLIC
"-//AspectJ//DTD//EN" "http://www.eclipse.org/aspectj/dtd/aspectj.dtd">
<aspectj>
<weaver>
<!-- only weave classes in our application-specific packages -->
<include within="com.test.server.graph.domain.model.*" />
</weaver>
<aspects>
<!-- weave in just this aspect -->
<aspect name="my.util.aspects.Neo4jFetchAspect" />
</aspects>
</aspectj>
我的部分 pom.xml（我现在有不同的设置 - 这就是 spring 版本这么旧的原因）：
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.6.12</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.6.12</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>3.1.1.RELEASE</version>
</dependency>
我没有任何特殊的构建插件或类似的
我经历了所有尝试在 Tomcat 上制作我的项目 运行 并点切模型 (getters) 并使用 AspectJ Load Time Weaver 编织它们的可能性。 基本上，我遵循了 Spring 文档 http://docs.spring.io/spring/docs/current/spring-framework-reference/html/aop.html#aop-atconfigurable. I also followed the same approach mentioned Lazy/Eager loading/fetching in Neo4j/Spring-Data 中的所有步骤。 我的项目分为两个主要项目： - 核心：spring-data-neo4j（存储库和配置）、专用包中的域模型、LoggingAspect 和 LazyLoadingAspect。 p.s。我没有在 XML 文件中使用任何配置。我纯粹是在使用注释。 - 内容：Tomcat 上的 Web 应用程序 运行 取决于核心项目，我想在域项目中调用 getter 方法时编织。
运行 核心本身我设法得到它 运行 使用 maven 插件并添加 aspectj 的依赖项。但是当我移动到 Tomcat 时，一切都开始了。我尝试了所有的可能性，例如使用 -javaagent，创建自定义 context.xml，将 spring-instrument 放入 tomcat/lib 文件夹等。我收到以下异常：
java.lang.IllegalStateException: Post-processor tried to replace bean instance of type [com.test.server.graph.domain.model.Sequence] with (proxy) object of type [org.springframework.beans.factory.aspectj.$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_AbstractDependencyInjectionAspectea6722c(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.$Proxy58.query(Unknown Source)
pom.xml (core.project)
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${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class（核心项目）
@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();
}
}
领域模型classes
根据 Spring 文档的建议，我在领域模型 class 中注释了
@Configurable
mvc-dispatcher-servlet（webapp 项目）
<context:spring-configured />
<context:load-time-weaver aspectj-weaving="on" weaver-class="org.springframework.instrument.classloading.tomcat.TomcatLoadTimeWeaver" />
我尝试 运行 使用 tomcat-maven-plugin 和 tomcat 独立安装（v7 和 v8）。
-- 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() {
}
}
主要问题似乎是您正在将方面应用到 bean：
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!
这行不通，因此您必须确保您的模型 类 是真正的 POJO 而不是 beans，并将它们从 spring 中排除。 （确保在 domain.model.* 中没有 spring 注释）- 也许如果你 post 你的 Sequence.java 我可以看到可能导致冲突的原因。
另一方面，您必须确保只将 aspectj 分配给模型而不是任何 bean。所以确保你有一个只包含你的 pojo 模型的 /META-INF/aop.xml:
<!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="com.test.server.graph.domain.model.*" />
</weaver>
<aspects>
<!-- weave in just this aspect -->
<aspect name="my.util.aspects.Neo4jFetchAspect" />
</aspects>
</aspectj>
我的部分 pom.xml（我现在有不同的设置 - 这就是 spring 版本这么旧的原因）：
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.6.12</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.6.12</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>3.1.1.RELEASE</version>
</dependency>
我没有任何特殊的构建插件或类似的