我正在尝试创建简单的Google App Engine + Spring + JPA（datanucles）工具。在我尝试启动本地开发服务器之前，一切似乎都很好。我的pom配置：
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-api-jpa</artifactId>
<version>${datanucleus.jpa.version}</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-core</artifactId>
<version>${datanucleus.jpa.version}</version>
</dependency>
<dependency>
<groupId>com.google.appengine.orm</groupId>
<artifactId>datanucleus-appengine</artifactId>
<version>2.1.1</version>
<!-- Need to exclude the enhancer since it interfere with the enhancer plugin. -->
<!-- <exclusions>
<exclusion>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-enhancer</artifactId>
</exclusion>
</exclusions>
-->
</dependency>
<dependency>
<groupId>javax.jdo</groupId>
<artifactId>jdo-api</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>org.apache.geronimo.specs</groupId>
<artifactId>geronimo-jpa_2.0_spec</artifactId>
<version>1.1</version>
</dependency>
<!-- Test Dependencies -->
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-testing</artifactId>
<version>${appengine.target.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-stubs</artifactId>
<version>${appengine.target.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<outputDirectory>target/${project.artifactId}-${project.version}/WEB-INF/classes</outputDirectory>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<archiveClasses>true</archiveClasses>
<webResources>
<!-- in order to interpolate version from pom into appengine-web.xml -->
<resource>
<directory>${basedir}/src/main/webapp/WEB-INF</directory>
<filtering>true</filtering>
<targetPath>WEB-INF</targetPath>
</resource>
</webResources>
</configuration>
</plugin>
<plugin>
<groupId>org.datanucleus</groupId>
<artifactId>maven-datanucleus-plugin</artifactId>
<version>${datanucleus.jpa.version}</version>
<configuration>
<api>JPA</api>
<mappingIncludes>io.volat.logger.persistence.entities/*.class</mappingIncludes>
<verbose>true</verbose>
</configuration>
<dependencies>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-core</artifactId>
<version>${datanucleus.jpa.version}</version>
</dependency>
</dependencies>
<executions>
<execution>
<phase>compile</phase>
<goals>
<goal>enhance</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
<pluginManagement>
<plugins>
<!--This plugin's configuration is used to store Eclipse m2e settings only. It has no influence on the Maven build itself.-->
<plugin>
<groupId>org.eclipse.m2e</groupId>
<artifactId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<pluginExecution>
<pluginExecutionFilter>
<groupId>
org.datanucleus
</groupId>
<artifactId>
maven-datanucleus-plugin
</artifactId>
<versionRange>
[${datanucleus.jpa.version},)
</versionRange>
<goals>
<goal>enhance</goal>
</goals>
</pluginExecutionFilter>
<action>
<ignore></ignore>
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
Maven build使用下一个输出成功执行TestEntity.class的增强：
[INFO] --- maven-datanucleus-plugin:3.1.1:enhance (default) @ logger-war ---
Downloading: http://www.datanucleus.org/downloads/maven2/org/datanucleus/datanucleus- enhancer/maven-metadata.xml
Downloading: http://www.datanucleus.org/downloads/maven2/javax/jdo/jdo-api/maven-metadata.xml
Downloading: http://www.datanucleus.org/downloads/maven2/org/ow2/asm/asm/maven-metadata.xml
[INFO] DataNucleus Enhancer (version 3.1.1) : Enhancement of classes
DataNucleus Enhancer completed with success for 1 classes. Timings : input=342 ms, enhance=122 ms, total=464 ms. Consult the log for full details
[ERROR] --------------------
[ERROR] Standard error from the DataNucleus tool + org.datanucleus.enhancer.DataNucleusEnhancer :
[ERROR] --------------------
[ERROR] May 31, 2014 5:13:37 PM org.datanucleus.enhancer.DataNucleusEnhancer <init>
INFO: DataNucleus Enhancer for API "JPA"
May 31, 2014 5:13:37 PM org.datanucleus.enhancer.DataNucleusEnhancer main
INFO: DataNucleus Enhancer (version 3.1.1) : Enhancement of classes
May 31, 2014 5:13:37 PM org.datanucleus.metadata.MetaDataManager loadFiles
WARNING: Metadata file -enhancerName not found in CLASSPATH
May 31, 2014 5:13:37 PM org.datanucleus.metadata.MetaDataManager loadFiles
WARNING: Metadata file ASM not found in CLASSPATH
May 31, 2014 5:13:37 PM org.datanucleus.enhancer.AbstractClassEnhancer save
INFO: Writing class file "/Users/abarysevich/backend/logger/logger-war/target/logger-war-1.0- SNAPSHOT/WEB-INF/classes/io/volat/logger/persistence/entities/TestEntity.class" with enhanced definition
May 31, 2014 5:13:38 PM org.datanucleus.enhancer.DataNucleusEnhancer addMessage
INFO: DataNucleus Enhancer completed with success for 1 classes. Timings : input=342 ms, enhance=122 ms, total=464 ms. Consult the log for full details
[ERROR] --------------------
但是当我尝试启动我的devserver时，它会因下一个错误而失败：
[INFO] SEVERE: Context initialization failed
[INFO] org.springframework.beans.factory.BeanDefinitionStoreException: Failed to read candidate component class: file [/Users/abarysevich/backend/logger/logger-ear/target/logger-ear-1.0-SNAPSHOT/logger-war-1.0-SNAPSHOT.war/WEB-INF/classes/io/volat/logger/persistence/entities/TestEntity.class]; nested exception is java.lang.ArrayIndexOutOfBoundsException: 130
我已经反编译了我的增强型持久化类TestEntity.class但在那里找不到任何错误：一切对我来说都很好。同样的实体也适用于此配置：GAE + JPA（数据核心）。在这两种情况下，构建输出（见上文）都是相同的。所以，我建议将问题缩小到Spring框架（特别是org.springframework.core.type.classreading.AnnotationMetadataReadingVisitor类）。
我不知道它有什么关系。我在互联网上找到的答案主要是关于编译文件中的错误我没有。
答案 0 :(得分：1)
原始海报找到的解决方案是将其增强的JPA实体类移动到单独的文件夹中。在搜索组件时确保它们位于Spring扫描目录之外。