尝试运行 org.hibernate.tool.ant.EnversHibernateToolTask​​ 时遇到了很多绊脚石 [英] stumbling blocks galore while trying to run org.hibernate.tool.ant.EnversHibernateToolTask

问题描述

我正在尝试按照 中的建议运行 org.hibernate.tool.ant.EnversHibernateToolTaskEnvers 的简洁指南(表格的第二行，文档有一个指向 PDF 的链接).这是我的 ant 任务调整后成功找到 org.hibernate.tool.ant.EnversHibernateToolTask​​ 和 org.hibernate.tool.ant.HibernateToolTask​​;现在它找不到 org.apache.tools.ant.Task 并且我有一种下沉的感觉，我做错了什么.

I'm trying to run org.hibernate.tool.ant.EnversHibernateToolTask as suggested in the rather terse guide to Envers (2nd line of table, Documentation has a link to a PDF). Here's my ant task tweaked so it successfully finds org.hibernate.tool.ant.EnversHibernateToolTask and org.hibernate.tool.ant.HibernateToolTask; now it can't find org.apache.tools.ant.Task and I have the sinking feeling I am doing something wrong.

<target name="schemaexport" depends="init"
        description="Exports a generated schema to DB and file">
<taskdef name="hibernatetool"
    classname="org.hibernate.tool.ant.EnversHibernateToolTask"
        classpath=".;C:\appl\Java\jre6u13\lib\ext\envers-1.2.0.ga-hibernate-3.3.jar;C:\appl\Java\jre6u13\lib\ext\hibernate-tools.jar" />
<!--classpathref="${schema.classpath}"/>-->
<hibernatetool destdir=".">
    <classpath>
        <fileset refid="lib.hibernate" />
        <path location="${build.dir}" />
    </classpath>
<jpaconfiguration persistenceunit="ConsolePU" />
<hbm2ddl
    drop="false"
    create="true"
    export="false"
    outputfilename="versioning-ddl.sql"
    delimiter=";"
    format="true"/>
</hibernatetool>
</target>

我以前从未做过自定义 ant 任务，所以我可能遗漏了一些非常简单的东西.有什么建议?我不知道在 hibernatetool 任务中为类路径放置什么，除了 基本 javadoc.

I've never done a custom ant task before so I'm probably missing something really simple. Any suggestions? I don't know what to put for the classpath in the hibernatetool task, which I can't find any documentation for beyond rudimentary javadoc.

好的，一些特定的问题试图解决这个问题......

edit: ok, some specific Q's to try to get to this piecemeal...

1. org.apache.tools.ant.Task 应该在哪个 jar 中，为什么 ant 找不到它?
2. 关于如何使用 HibernateToolTask​​ 的文档在哪里?(我假设 EnversHibernateToolTask​​ 应该可以正常工作)

1. which jar is org.apache.tools.ant.Task supposed to be in, and why can't ant find it?
2. where are the docs on how to use HibernateToolTask? (I assume EnversHibernateToolTask is supposed to work the same)

update (2009-06-18):好吧，我终于鼓起勇气尝试在这方面取得一些进展并取得了一些进展.我可以通过做两件事来让它几乎工作:

update (2009-06-18): OK, I finally screwed up my courage to try to make some progress on this and made some headway. I can get it to almost work by doing two things:

1. 从命令行运行 ant schemaexport，而不是从 Eclipse 中运行，以运行我的 schemaexport 目标.(Eclipse 中的 ant 似乎找不到 org/apache/tools/ant/Task 并且我不知道如何在 Eclipse 中设置 Ant 类路径(与 taskdef 项中的类路径不同；不知何故我必须告诉 ant当它运行自定义任务时使用类路径找到它自己该死的类.这太疯狂了.... grrr...)

2. 通过粘贴在 JRE 的 /lib/ext 目录中，确保我的类路径包含我认为理所当然的所有 jar:

1. run ant schemaexport from the command line, rather than from within Eclipse, to run my schemaexport target. (ant in Eclipse can't seem to find org/apache/tools/ant/Task and I don't know how to set the Ant classpath in eclipse (distinct from the classpath in the taskdef item; somehow I have to tell ant to use a classpath to find its own damn class when it runs a custom task. this is insane.... grrr...)

2. ensuring my classpath contains all the jars that I just take for granted by sticking in my JRE's /lib/ext directory:

• envers-1.2.0.ga-hibernate-3.3.jar
• hibernate3.jar
• hibernate-tools.jar
• slf4j-log4j12-1.5.6.jar
• slf4j-api-1.5.6.jar
• log4j-1.2.15.jar

现在我遇到了一个新问题:

Now I get a new problem:

构建失败C:\deka\proj\java\test-database\build.xml:61:创建配置的问题对于 JPA.你记得添加吗休眠 EntityManager jars 到类路径?

BUILD FAILED C:\deka\proj\java\test-database\build.xml:61: Problems in creating a configurati on for JPA. Have you remembered to add hibernate EntityManager jars to the class path ?

[[[[[[尖叫]]]]]]

[[[[[scream]]]]]

更新看来我也需要

• hibernate-entitymanager.jar
• hibernate-annotations.jar

而且我仍然收到类加载器错误:

and I STILL get classloader errors:

BUILD FAILED
java.lang.NoClassDefFoundError: javax/persistence/PersistenceException
        at java.lang.Class.getDeclaredConstructors0(Native Method)
        at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
        at java.lang.Class.getConstructor0(Class.java:2699)
        at java.lang.Class.newInstance0(Class.java:326)
        at java.lang.Class.newInstance(Class.java:308)
        at org.hibernate.tool.ant.JPAConfigurationTask.createConfiguration(JPACo
nfigurationTask.java:33)
        at org.hibernate.tool.ant.ConfigurationTask.getConfiguration(Configurati
onTask.java:54)

如何在不使用 J2EE 服务器的情况下运行此程序?！?！?！?！?！?我还需要哪些其他 JAR 文件?我真的很困惑和沮丧.

How can I run this w/o having to use a J2EE server?!?!?!?!?!? What other JAR files do I need? I am really confused and frustrated.

更新 (2009-06-23):我终于成功构建了.好像你需要:

update (2009-06-23): I finally got a successful build. Seems like you need:

* envers-1.2.0.ga-hibernate-3.3.jar
* hibernate3.jar
* hibernate-tools.jar
* slf4j-log4j12-1.5.6.jar
* slf4j-api-1.5.6.jar 
* log4j-1.2.15.jar
* dom4j-1.6.1.jar
* hibernate-commons-annotations.ja
* a JAR containing JTA classes (Sun doesn't have a JAR file but you can download the [class files][3] yourself and make a JAR file out of it)
* a JAR containing JPA classes (I used toplink-essentials.jar from the glassfish project, per [this SO question][4])
* commons-logging-1.1.1.jar
* freemarker.jar

并确保使用

<annotationconfiguration configurationfile="${some_path}/hibernate.cfg.xml"/>

而不是示例 ant 任务中包含的 项.尽管如此，它仍然无法正常工作，我没有包含 envers 表.:(

instead of the <jpaconfiguration> item included in the sample ant task. It still doesn't work properly though, I don't get the envers tables included. :(

推荐答案

EnversHibernateToolTask​​ 扩展了 HibernateToolTask​​.我需要做的就是以下几点:

EnversHibernateToolTask extends HibernateToolTask. All I needed to do was the following:

<taskdef name="hibernatetool"
classname="org.hibernate.tool.ant.EnversHibernateToolTask"
        classpath="envers-1.2.0.ga-hibernate-3.3.jar" />

否则，查看您粘贴的 ant 文件的输出会很有帮助.

Otherwise it would be helpful to see the output of the ant file you've pasted.

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