我一直在努力为我已经存在的GAE / J项目找出好的pom.xml。
这是我的pom.xml的“最有效”版本（它可能非常混乱）：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<!-- The Basics -->
<groupId>com.***</groupId>
<artifactId>***</artifactId>
<version>0.3-SNAPSHOT</version>
<packaging>war</packaging>
<name>***</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<downloadSources>true</downloadSources>
<!-- GAE SPECIFICS -->
<!-- Upload to http://test.latest.<applicationName>.appspot.com by default -->
<gae.application.version>test</gae.application.version>
<gae.version>1.6.1</gae.version>
<gae.sdk.version>1.6.1</gae.sdk.version>
<gae.port>8888</gae.port>
<datanucleus.gae.version>1.0.10</datanucleus.gae.version>
<datanucleus.version>3.0.5</datanucleus.version>
<!-- Web -->
<servlet.version>2.5</servlet.version>
<spring.version>3.0.5.RELEASE</spring.version>
<!-- Data -->
<jdo.version>2.3-ea</jdo.version>
<!-- Validation -->
<validation.version>1.0.0.GA</validation.version>
<hibernate.validator.version>4.2.0.Final</hibernate.validator.version>
<!-- Utils -->
<log.version>1.6.1</log.version>
<!-- Test -->
<mockito.version>1.8.5</mockito.version>
<junit.version>4.8.2</junit.version>
</properties>
<dependencies>
<!-- Google App Engine meta-package -->
<dependency>
<groupId>net.kindleit</groupId>
<artifactId>gae-runtime</artifactId>
<version>${gae.version}</version>
<type>pom</type>
</dependency>
<!-- Web -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-taglibs</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>${servlet.version}</version>
<scope>provided</scope>
</dependency>
<!-- Data -->
<dependency>
<groupId>javax.jdo</groupId>
<artifactId>jdo2-api</artifactId>
<version>${jdo.version}</version>
<exclusions>
<exclusion>
<groupId>javax.transaction</groupId>
<artifactId>transaction-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-core</artifactId>
<version>${datanucleus.version}</version>
<scope>runtime</scope>
<exclusions>
<exclusion>
<groupId>javax.transaction</groupId>
<artifactId>transaction-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-api-jpa</artifactId>
<version>3.0.5</version>
</dependency>
<dependency>
<groupId>javax.transaction</groupId>
<artifactId>jta</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-rdbms</artifactId>
<version>${datanucleus.version}</version>
</dependency>
<dependency>
<groupId>com.google.appengine.orm</groupId>
<artifactId>datanucleus-appengine</artifactId>
<version>1.0.10</version>
</dependency>
<dependency>
<groupId>org.apache.geronimo.specs</groupId>
<artifactId>geronimo-jpa_2.0_spec</artifactId>
<version>1.0</version>
</dependency>
<!-- Validation -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>${hibernate.validator.version}</version>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>${validation.version}</version>
</dependency>
<dependency>
<groupId>javax.persistence</groupId>
<artifactId>persistence-api</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>javax.transaction</groupId>
<artifactId>jta</artifactId>
<version>1.1</version>
</dependency>
<!-- J2EE Servlet API. We need it to compile IndexServlet class. You can
probably remove it, if you don't explicitly use Servlets -->
<dependency>
<groupId>org.apache.geronimo.specs</groupId>
<artifactId>geronimo-servlet_2.5_spec</artifactId>
<version>1.2</version>
<scope>provided</scope>
</dependency>
<!-- Make use of JSP tags. Remove, if you don't use JSPs -->
<dependency>
<artifactId>standard</artifactId>
<groupId>taglibs</groupId>
<version>1.1.2</version>
<type>jar</type>
<scope>runtime</scope>
</dependency>
<!-- These dependencies are here just for enabling logging -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.6.1</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>0.9.24</version>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-all</artifactId>
<version>${mockito.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<!-- GAE libraries for local testing as described here: http://code.google.com/appengine/docs/java/howto/unittesting.html -->
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-labs</artifactId>
<version>${gae.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-stubs</artifactId>
<version>${gae.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-testing</artifactId>
<version>${gae.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<!-- This plug-in "enhances" your domain model objects (i.e. makes them
persistent for datanucleus) -->
<plugin>
<groupId>org.datanucleus</groupId>
<artifactId>maven-datanucleus-plugin</artifactId>
<version>3.0.1</version>
<configuration>
<!-- Make sure this path contains your persistent classes! -->
<mappingIncludes>**/model/*.class</mappingIncludes>
<verbose>true</verbose>
<enhancerName>ASM</enhancerName>
<api>JPA</api>
</configuration>
<executions>
<execution>
<phase>compile</phase>
<goals>
<goal>enhance</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-core</artifactId>
<version>${datanucleus.version}</version>
<exclusions>
<exclusion>
<groupId>javax.transaction</groupId>
<artifactId>transaction-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-rdbms</artifactId>
<version>${datanucleus.version}</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-enhancer</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>javax.jdo</groupId>
<artifactId>jdo2-api</artifactId>
<version>${jdo.version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>javax.jdo</groupId>
<artifactId>jdo-api</artifactId>
<version>3.0</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.1-beta-1</version>
<configuration>
<webResources>
<resource>
<directory>src/main/webapp</directory>
<filtering>true</filtering>
<includes>
<include>**/appengine-web.xml</include>
</includes>
</resource>
</webResources>
</configuration>
</plugin>
<!-- The actual maven-gae-plugin. Type "mvn gae:run" to run project, "mvn
gae:deploy" to upload to GAE. -->
<plugin>
<groupId>net.kindleit</groupId>
<artifactId>maven-gae-plugin</artifactId>
<version>0.9.2</version>
<dependencies>
<dependency>
<groupId>net.kindleit</groupId>
<artifactId>gae-runtime</artifactId>
<version>${gae.version}</version>
<type>pom</type>
</dependency>
</dependencies>
</plugin>
<!-- Upload application to the appspot automatically, during release:perform -->
<plugin>
<artifactId>maven-release-plugin</artifactId>
<configuration>
<goals>gae:deploy</goals>
</configuration>
</plugin>
<!-- Java compiler version -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.0</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.5</version>
<configuration>
<excludes>
<exclude>com/***/integration/**/*Test.java</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
<profiles>
<!-- We can configure our integration server to activate this profile and
perform gae:deploy, thus uploading latest snapshot to the http://1.latest.<applicationName>.appspot.com
automatically -->
<profile>
<id>integration-build</id>
<properties>
<gae.application.version>stage</gae.application.version>
</properties>
</profile>
<!-- This profile will activate automatically during release and upload
application to the http://2.latest.<applicationName>.appspot.com (We might
want to set the 2nd version as our applications Default version to be accessible
at http://<applicationName>.appspot.com) -->
<profile>
<id>release-build</id>
<activation>
<property>
<name>performRelease</name>
<value>true</value>
</property>
</activation>
<properties>
<!-- During release, set application version in appengine-web.xml to
2 -->
<gae.application.version>release</gae.application.version>
</properties>
</profile>
</profiles>
这就是我在运行mvn gae:run时获得的：
WARNING: Nested in org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in ServletContext resource [/WEB-INF/***-services.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public static javax.persistence.EntityManagerFactory javax.persistence.Persistence.createEntityManagerFactory(java.lang.String)] threw exception; nested exception is java.lang.NoClassDefFoundError: org/datanucleus/OMFContext:
java.lang.ClassNotFoundException: org.datanucleus.OMFContext
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass(IsolatedAppClassLoader.java:176)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at org.datanucleus.jpa.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:293)
at org.datanucleus.store.appengine.jpa.DatastoreEntityManagerFactory.<init>(DatastoreEntityManagerFactory.java:63)
at org.datanucleus.store.appengine.jpa.DatastorePersistenceProvider.createEntityManagerFactory(DatastorePersistenceProvider.java:35)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:150)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:70)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:104)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:145)
at org.springframework.beans.factory.support.ConstructorResolver$3.run(ConstructorResolver.java:564)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:562)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:983)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:879)
[...]
Jan 17, 2012 11:24:55 PM com.google.apphosting.utils.jetty.JettyLogger info
INFO: Started SelectChannelConnector@0.0.0.0:8888
Jan 17, 2012 11:24:55 PM com.google.appengine.tools.development.DevAppServerImpl start
INFO: The server is running at http://localhost:8888/
Jan 17, 2012 11:24:55 PM com.google.appengine.tools.development.DevAppServerImpl start
INFO: The admin console is running at http://localhost:8888/_ah/admin
我更改了datanucleus-core的版本，以便可以找到OMFContent但是它失败得更厉害。
知道如何解决这个问题吗？
答案 0 :(得分：-2)
GAE v1.0.10需要DataNucleus v1.1.x
GAE v2.x需要DataNucleus 3.x