Problems using hbm2ddl ant task and Hibernate 3 annotations

huelsmeier · **Posted:** Wed Jul 27, 2005 12:00 pm

Hi all,

I've a problem with using Hibernate 3 (with annotations) and the Hibernate ant task (from hibernate.tools.jar).

My ant task looks like that (snippet):

Code:

   <!-- Define paths -->
     <path id="class.path">
      <fileset dir="${lib.dir}">
            <include name="**/*.jar"/>
       </fileset>
     </path>

   <path id="hbn.path">
       <path refid="class.path"/>
      <fileset dir="${classes.dir}" />
   </path>

   <target name="hibernate" description="Generates the hibernate files.">
      <hibernatetool destdir="${basedir}" classpath="hbn.path">
         <annotationconfiguration configurationfile="${gen-src.dir}/hibernate.cfg.xml"/>
         <!-- SchemaExport based on Annotations -->
         <hbm2ddl drop="false" outputfilename="ddl/evalon_ddl.sql" />
        </hibernatetool>
   </target>

Mapping documents:

Code:

<hibernate-configuration>
   <session-factory>

      <!-- hibernate properties -->
      <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
      <property name="hibernate.connection.url">jdbc:mysql://localhost/hbn2oaw</property>
      <property name="hibernate.connection.username">webshop_user</property>
      <property name="hibernate.connection.password">webshop_user</property>
      <property name="hibernate.connection.pool_size">5</property>
      <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
      <property name="show_sql">true</property>
      <property name="use_outer_join">false</property>

      <!-- mapping -->

      <mapping class="net.sf.evalon.entity.Person" />


   </session-factory>
</hibernate-configuration>

Ant output (on Eclipse console):

Code:

Buildfile: E:\Fachhochschule\Projektarbeit\EvalOn\build.xml
Overriding previous definition of reference to class.path
hibernate:
[hibernatetool] Executing org.hibernate.tool.ant.Hbm2DDLGeneratorTask@1eb2c1b
[hibernatetool] 27.07.2005 17:54:19 org.hibernate.cfg.Environment <clinit>
[hibernatetool] INFO: Hibernate 3.0.3
[hibernatetool] 27.07.2005 17:54:19 org.hibernate.cfg.Environment <clinit>
[hibernatetool] INFO: hibernate.properties not found
[hibernatetool] 27.07.2005 17:54:19 org.hibernate.cfg.Environment <clinit>
[hibernatetool] INFO: using CGLIB reflection optimizer
[hibernatetool] 27.07.2005 17:54:19 org.hibernate.cfg.Environment <clinit>
[hibernatetool] INFO: using JDK 1.4 java.sql.Timestamp handling
[hibernatetool] 27.07.2005 17:54:19 org.hibernate.cfg.Configuration configure
[hibernatetool] INFO: configuring from file: hibernate.cfg.xml

BUILD FAILED
E:\Fachhochschule\Projektarbeit\EvalOn\build.xml:103: org.hibernate.MappingException: Unable to load class declared as <mapping class="net.sf.evalon.entity.Person"/> in the configuration:

After trying for some hours I'm still not able to find out what I did wrong?

I just followed the instructions from the documentation...
(http://www.hibernate.org/hib_docs/tools/ant/index.html)

Greets,
Christian
(still hoping that someone is able to help him :)!)

ssa1 · **Joined:** Tue Nov 09, 2004 5:15 pm **Posts:** 100

SchemaExport based on annotations need .class files. Are you sure you compile your classes before running schemaexport? I don't see that your ant target "hibernate" has any dependency on "compile" target.

huelsmeier · **Posted:** Wed Jul 27, 2005 3:32 pm

Hi,

yes, there's a compile task running before my hibernate task. I just posted a snippet :).

huelsmeier wrote:

My ant task looks like that (snippet):

Well, here is my complete build file. Maybe this helps more to help me :).

Code:

<project basedir="." default="buildwar" name="EvalOn4Tomcat">

   <!-- load properties from file -->
   <property file="build.properties"/>
   
   <!-- define properties -->
     <property name="src.dir"        value="${basedir}/base-src"/>
     <property name="gen-src.dir"    value="${basedir}/src"/>
     <property name="classes.dir"    value="${basedir}/bin"/>
     <property name="lib.dir"        value="${basedir}/lib" />
     <property name="webinf.dir"     value="${basedir}/WEB-INF"/>
   <property name="htdocs.dir"     value="${basedir}/htdocs"/>
   <property name="build.dir"      value="${basedir}/build"/>
   <property name="dist.dir"       value="${basedir}/dist"/>

   <property name="war.name"      value="evalon.war" />

   <taskdef 
        name="hibernatetool" 
        classname="org.hibernate.tool.ant.HibernateToolTask" 
       classpathref="class.path" />
      
   <!-- Define paths -->
     <path id="class.path">
      <fileset dir="${lib.dir}">
            <include name="**/*.jar"/>
       </fileset>
     </path>

   <path id="hbn.path">
       <path refid="class.path"/>
      <fileset dir="${classes.dir}" />
   </path>
   
   <path id="src.path">
      <fileset dir="${src.dir}">
         <include name="**/*.java"/>
      </fileset>
      <fileset dir="${gen-src.dir}">
         <include name="**/*.java"/>
      </fileset>
   </path>

    <target name="compile" description="Compiles the sources." >
       <delete dir="${classes.dir}" />
       <mkdir  dir="${classes.dir}"/>
       <javac destdir="${classes.dir}"
              classpathref="class.path"
              debug="on"
              deprecation="on"
              optimize="off">
         <src path="${src.dir}"/>
        <src path="${gen-src.dir}"/>
       </javac>
   </target>

   <target name="prepare" depends="compile" description="Prepares the war-build buy generating a tmp-dir and copying the compiles data.">
       <!-- make directories -->
       <delete dir="${build.dir}" />
       <mkdir dir="${build.dir}"/>
       <mkdir dir="${build.dir}/WEB-INF" />
       <!--mkdir dir="${build.dir}/WEB-INF/src" /-->
       <mkdir dir="${build.dir}/WEB-INF/classes" />

       <delete dir="${dist.dir}" />
       <mkdir dir="${dist.dir}"/>
      <!-- copy jsp-Sites -->
       <copy todir="${build.dir}" includeemptydirs="true">
          <fileset dir="${htdocs.dir}">
              <include name="**/*.*"/>
             <exclude name=".*.jsp" />
           </fileset>
       </copy>
       <!-- copy web-information -->
       <copy todir="${build.dir}/WEB-INF" includeemptydirs="true">
          <fileset dir="${webinf.dir}">
              <include name="**/*.*"/>
          </fileset>
       </copy>
       <!-- copy classes -->
       <copy todir="${build.dir}/WEB-INF/classes" includeemptydirs="true">
           <fileset dir="${classes.dir}">
               <include name="**/*.*"/>
           </fileset>
       </copy>
       <!-- copy properties -->
       <copy todir="${build.dir}/WEB-INF/classes" includeemptydirs="true">
            <fileset dir="${src.dir}">
              <include name="*.properties"/>
          </fileset>
       </copy>
      <!-- copy libraries -->
      <copy todir="${build.dir}/WEB-INF/lib" includeemptydirs="true">
         <fileset dir="${lib.dir}">
            <include name="commons-*.jar" />
            <include name="struts.jar" />
            <include name="jakarta-oro.jar" />
         </fileset>
      </copy>
   </target>
   
   <target name="hibernate" description="Generates the hibernate files.">
      <hibernatetool destdir="${basedir}" classpath="hbn.path">
         <annotationconfiguration configurationfile="${gen-src.dir}/hibernate.cfg.xml"/>
         <!-- SchemaExport based on Annotations -->
         <hbm2ddl drop="false" outputfilename="ddl/evalon_ddl.sql" />
        </hibernatetool>
   </target>

     <target name="buildwar" depends="prepare, hibernate" description="Builds war file in the temp-directory" >
        <war basedir="${build.dir}" destfile="${dist.dir}/${war.name}"  webxml="${build.dir}/WEB-INF/web.xml" includes="**/*.*" />
     </target>

</project>

bdudney · **Posted:** Wed Jul 27, 2005 5:54 pm

Hi,

I think your

Quote:

is to blame.

Try instead to use this;

Quote:

I think what is happening is that fileset is creating a group of .class files where the classpath entry needs the top level directory that contains net.sf.evalon.* classes.

Hope this helps.

-bd-

huelsmeier · **Posted:** Thu Jul 28, 2005 3:43 am

No, that doesn't work. :(
I also tried to build a jar file including my class files and add it to the classpath which didn't work.

Does anyone did ever do the same I'm trying to do: creating a ddl out of mapping information contained in annotations?
Maybe he/she is willing to post his solution if it works?

max · **Posted:** Thu Jul 28, 2005 4:47 am

try to use the latest version of tools from cvs if possible - we had a fix regarding classloading in this area.