我试图在GAE上运行Tapestry。过了一段时间，我能够解决最后的错误，至少显示一个简单的页面。但是，说实话，某种数据存储会很好。 我试图使用tapestry-jdo，但有我的问题：我无法使用JDO的任何部分，我已经尝试了好几天。
我将发布我工作过的pom.xml。我为版本号尝试了很多组合，但是大多数测试JDO的actionlink都失败了，因为找不到org.datanucleus.store.appengine.jdo.DatastoreJDOPersistenceManagerFactory。 剩下的时间里，我从tapestry那里得到了一个未被捕获的异常，这是由另一个缺少的JDO类引起的，但这次不是在构建JDOEntityManagerSource时，而是在更深的地方。
我没有学过编程，我自学了，所以我的专业知识有限。 这个pom.xml可能包含针条目。
如果我用maven构建它，我会在某些情况下获得Could not transfer metadata asm:asm/maven-metadata.xml from/to local.repository (file:../../local.repository/trunk): No connector available to access repository local.repository。
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>Example</artifactId>
<version>0.1</version>
<packaging>war</packaging>
<name>Example</name>
<dependencies>
<dependency>
<groupId>org.apache.tapestry</groupId>
<artifactId>tapestry-core</artifactId>
<version>${tapestry-release-version}</version>
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-labs</artifactId>
<version>${gae.version}</version>
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-1.0-sdk</artifactId>
<version>${gae.version}</version>
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-java-sdk</artifactId>
<version>${gae.version}</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>javax.jdo</groupId>
<artifactId>jdo2-api</artifactId>
<version>2.3-eb</version>
</dependency>
<dependency>
<groupId>com.google.appengine.orm</groupId>
<artifactId>datanucleus-appengine</artifactId>
<version>2.0.0-RC3</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-rdbms</artifactId>
<version>${datanucleus.version}</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-core</artifactId>
<version>${datanucleus.version}</version>
</dependency>
<dependency>
<groupId>org.tynamo</groupId>
<artifactId>tapestry-jdo</artifactId>
<version>0.0.1</version>
</dependency>
<!-- Provided by the servlet container, but sometimes referenced in the application code. -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<finalName>Example</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
<optimize>true</optimize>
</configuration>
</plugin>
<plugin>
<groupId>net.kindleit</groupId>
<artifactId>maven-gae-plugin</artifactId>
<version>0.6.0</version>
<configuration>
<serverId>appengine.google.com</serverId>
</configuration>
</plugin>
<!--
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>1.1.4</version>
<configuration>
<mappingIncludes>**/entities/*.class</mappingIncludes><!--*/ just to stop formatig the rest of the code as comment-->
<verbose>true</verbose>
<enhancerName>ASM</enhancerName>
<api>JDO</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>1.1.4</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>tapestry-snapshots</id>
<url>http://repository.apache.org/snapshots/</url>
</repository>
<repository>
<id>codehaus.snapshots</id>
<url>http://snapshots.repository.codehaus.org</url>
</repository>
<repository>
<id>maven-gae-plugin-repo</id>
<name>Maven Google App Engine Repository</name>
<url>http://maven-gae-plugin.googlecode.com/svn/repository/</url>
</repository>
<repository>
<id>data-nucleus</id>
<url>http://www.datanucleus.org/downloads/maven2/</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>tapestry-snapshots</id>
<url>http://repository.apache.org/snapshots/</url>
</pluginRepository>
<pluginRepository>
<id>maven-gae-plugin-repo</id>
<name>maven-gae-plugin repository</name>
<url>http://maven-gae-plugin.googlecode.com/svn/repository</url>
</pluginRepository>
</pluginRepositories>
<properties>
<tapestry-release-version>5.3.2</tapestry-release-version>
<gae.version>1.6.3</gae.version>
<datanucleus.version>1.1.5</datanucleus.version>
</properties>
</project>
答案 0 :(得分：1)
datanucleus-appengine插件v2应该与DataNucleus jars v3.0。*和javax.jdo jdo-api v3.0.1一起使用...根据GAE的文档 http://code.google.com/p/datanucleus-appengine/wiki/UpgradingToVersionTwo