Hi,
I am building a simple application using Hibernate and Maven.
I came across your plugin "hibernate3:hbm2ddl" which generates the tables in
the database. But, upon using it I get following exception:
~EXCEPTION~
[INFO] [hibernate3:hbm2ddl]
16:11:26,735 INFO org.hibernate.cfg.Environment - Hibernate 3.2.0.cr5
16:11:26,735 INFO org.hibernate.cfg.Environment - hibernate.properties not
found
16:11:26,766 INFO org.hibernate.cfg.Environment - Bytecode provider name :
cglib
16:11:26,766 INFO org.hibernate.cfg.Environment - using JDK 1.4
java.sql.Timestamp handling
[INFO] Configuration XML file loaded:
E:\Rishabh\Projects\Learning\auctionapp\src\main\resources\hibernate.cfg.xml
16:11:26,813 INFO org.hibernate.cfg.Configuration - configuring from file:
hibernate.cfg.xml
16:11:26,985 INFO org.hibernate.cfg.Configuration - Reading mappings from
resource: com/learning/app/model/BaseModel.hbm.xml
16:11:27,126 INFO org.hibernate.cfg.HbmBinder - Mapping class:
com.learning.app.model.BaseModel -> BaseModel
16:11:27,188 INFO org.hibernate.cfg.HbmBinder - Mapping union-subclass:
com.learning.app.model.User -> USER
16:11:27,204 INFO org.hibernate.cfg.HbmBinder - Mapping union-subclass:
com.learning.app.model.Role -> ROLE
16:11:27,204 INFO org.hibernate.cfg.Configuration - Configured
SessionFactory: null
16:11:27,204 INFO org.hibernate.cfg.Configuration - Reading mappings from
file:
E:\Rishabh\Projects\Learning\auctionapp\target\classes\com\learning\app\model\BaseModel.hbm.xml
[INFO] src/main/resources/database.properties not found within the project.
Trying absolute path.
[INFO] No hibernate properties file loaded.
16:11:27,251 INFO org.hibernate.cfg.Mappings - duplicate import:
com.learning.app.model.BaseModel->com.learning.app.model.BaseModel
16:11:27,251 INFO org.hibernate.cfg.Mappings - duplicate import:
com.learning.app.model.BaseModel->BaseModel
16:11:27,251 INFO org.hibernate.cfg.HbmBinder - Mapping class:
com.learning.app.model.BaseModel -> BaseModel
16:11:27,251 INFO org.hibernate.cfg.Mappings - duplicate import:
com.learning.app.model.User->com.learning.app.model.User
16:11:27,251 INFO org.hibernate.cfg.Mappings - duplicate import:
com.learning.app.model.User->User
Exception in thread "main" org.hibernate.InvalidMappingException: Could not
parse mapping document from file
E:\Rishabh\Projects\Learning\auctionapp\target\classes\com\learning\app\model\BaseModel.hbm.xml
at org.hibernate.cfg.Configuration.addFile(Configuration.java:306)
at org.hibernate.cfg.Configuration.addDirectory(Configuration.java:623)
at org.hibernate.cfg.Configuration.addDirectory(Configuration.java:620)
at org.hibernate.cfg.Configuration.addDirectory(Configuration.java:620)
at org.hibernate.cfg.Configuration.addDirectory(Configuration.java:620)
at org.hibernate.cfg.Configuration.addDirectory(Configuration.java:620)
at
org.codehaus.mojo.hibernate3.configuration.DefaultComponentConfiguration.doConfiguration(DefaultComponentConfiguration.java:30)
at
org.codehaus.mojo.hibernate3.configuration.AbstractComponentConfiguration.getConfiguration(AbstractComponentConfiguration.java:37)
at
org.codehaus.mojo.hibernate3.exporter.Hbm2DDLExporterMojo.doExecute(Hbm2DDLExporterMojo.java:87)
at
org.codehaus.mojo.hibernate3.HibernateExporterMojo.execute(HibernateExporterMojo.java:140)
at
org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:579)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:498)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegmentForProject(DefaultLifecycleExecutor.java:265)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:191)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:149)
at
org.apache.maven.DefaultMaven.execute_aroundBody0(DefaultMaven.java:223)
at
org.apache.maven.DefaultMaven.execute_aroundBody1$advice(DefaultMaven.java:304)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:1)
at
org.apache.maven.embedder.MavenEmbedder.execute_aroundBody2(MavenEmbedder.java:904)
at
org.apache.maven.embedder.MavenEmbedder.execute_aroundBody3$advice(MavenEmbedder.java:304)
at org.apache.maven.embedder.MavenEmbedder.execute(MavenEmbedder.java:1)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:176)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:63)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:52)
Caused by: org.hibernate.DuplicateMappingException: Duplicate table mapping
USER
at org.hibernate.cfg.Mappings.addDenormalizedTable(Mappings.java:192)
at org.hibernate.cfg.HbmBinder.bindUnionSubclass(HbmBinder.java:787)
at org.hibernate.cfg.HbmBinder.handleUnionSubclass(HbmBinder.java:2194)
at
org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2107)
at
org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2031)
at
org.hibernate.cfg.HbmBinder.bindRootPersistentClassCommonValues(HbmBinder.java:359)
at org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:273)
at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:144)
at org.hibernate.cfg.Configuration.add(Configuration.java:424)
at
org.hibernate.cfg.Configuration.addInputStream(Configuration.java:465)
at org.hibernate.cfg.Configuration.addFile(Configuration.java:303)
... 23 more
What I noticed is that the plugin is loading my mapping file (*.hbm.xml)
twice! If I remove the <mapping> tag from my configuration file
(hibernate.cfg.xml) then everything works normally. Which means that my
mapping file is searched for in the classpath and loaded, and if I specify
it in the configuration file also then I get the above exception, for it has
loaded it again.
Is there a way to prevent the auto-loading of the mapping files from the
classpath and only load them when the plugin reads the configuration file?
Below is a portion of the pom.xml file.
~POM.XML~
...
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>hibernate3-maven-plugin</artifactId>
<version>2.0-alpha-2</version>
<configuration>
<components>
<component>
<name>hbm2ddl</name>
<implementation>configuration</implementation>
</component>
</components>
<componentProperties>
<drop>true</drop>
<configurationfile>/src/main/resources/hibernate.cfg.xml</configurationfile>
<outputfilename>schema.sql</outputfilename>
</componentProperties>
<executions>
<execution>
<phase>process-resources</phase>
<goals>
<goal>hbm2ddl</goal>
</goals>
</execution>
</executions>
</configuration>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
</dependencies>
</plugin>
...
Regards,
Rishabh
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