Hello
I have to set up a system to help database migrations. Tried to use LiquiBase but it seems not enough mature yet to be used with Hibernate.
What i would like to do is:
- I have version 1.0 of the application in production
- I have version 2.0 of the application developped and tested
- I want to update the application database in production without loosing data
Actually i would like to use the new persistence.xml and the production database to be able to generate the "delta" between the old database and the new. I would like to be able to retrieve the sql code that is executed when hbm2ddl is on "update" mode.
This sql code will be modified (drop+create=rename etc...) to avoid loosing data, that could happen with hbm2ddl.auto=update.
I guess it is possible because hibernate does it when deploying new version with hbm2ddl.auto=update. But i want to be able to do it on an Ant task with "hibernatetool".
I don't find many informations about this on internet so i wonder if someone already done something like that here and could help me.
I've done the following:
Code:
<hibernatetool destdir="${dist}">
<!--
<jdbcconfiguration propertyfile="hibtest.properties"></jdbcconfiguration>
-->
<jpaconfiguration persistenceunit="server-pu" />
<classpath>
<fileset dir="${core.lib.server}" includes="*.jar" />
<fileset dir="${core.lib.runtime}" includes="*.jar" />
<fileset dir="${core.lib.build}" includes="*.jar" />
<pathelement location="${core.class}" />
<pathelement location="${core.etc}" />
</classpath>
<hbm2ddl outputfilename="schema-delta.sql" format="true"
export="false" update="true" />
</hibernatetool>
I don't really know how to do, i was able to get the creation sql file, but i just want the delta.
I have to put update="true" ?
Can i use the jpaconfig with persistence unit outside of application server (the db settings are set on JNDI ressource on Glassfish). (tried and it just can't find the db)
I tried also with <jdbcconfiguration propertyfile="hibtest.properties"></jdbcconfiguration> or setting properties of db in persistence.xml instead of using JNDI ressource.
I got the following error
Code:
BUILD FAILED
/home/slorber/workspace/build/build.xml:899: org.hibernate.exception.JDBCConnectionException: Getting database metadata
at org.hibernate.tool.ant.HibernateToolTask.reportException(HibernateToolTask.java:226)
at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.java:189)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:357)
at org.apache.tools.ant.Target.performTasks(Target.java:385)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329)
at org.apache.tools.ant.Project.executeTarget(Project.java:1298)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.eclipse.ant.internal.ui.antsupport.EclipseDefaultExecutor.executeTargets(EclipseDefaultExecutor.java:32)
at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.run(InternalAntRunner.java:423)
at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.main(InternalAntRunner.java:137)
Caused by: org.hibernate.exception.JDBCConnectionException: Getting database metadata
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:97)
at org.hibernate.cfg.reveng.dialect.AbstractMetaDataDialect.getMetaData(AbstractMetaDataDialect.java:64)
at org.hibernate.cfg.reveng.dialect.AbstractMetaDataDialect.caseForSearch(AbstractMetaDataDialect.java:163)
at org.hibernate.cfg.reveng.dialect.JDBCMetaDataDialect.getTables(JDBCMetaDataDialect.java:22)
at org.hibernate.cfg.reveng.JDBCReader.processTables(JDBCReader.java:476)
at org.hibernate.cfg.reveng.JDBCReader.readDatabaseSchema(JDBCReader.java:74)
at org.hibernate.cfg.reveng.JDBCReader.readDatabaseSchema(JDBCReader.java:860)
at org.hibernate.cfg.JDBCBinder.readDatabaseSchema(JDBCBinder.java:115)
at org.hibernate.cfg.JDBCBinder.readFromDatabase(JDBCBinder.java:88)
at org.hibernate.cfg.JDBCMetaDataConfiguration.readFromJDBC(JDBCMetaDataConfiguration.java:42)
at org.hibernate.tool.ant.JDBCConfigurationTask.doConfiguration(JDBCConfigurationTask.java:81)
at org.hibernate.tool.ant.ConfigurationTask.getConfiguration(ConfigurationTask.java:55)
at org.hibernate.tool.ant.HibernateToolTask.getConfiguration(HibernateToolTask.java:302)
at org.hibernate.tool.ant.Hbm2DDLExporterTask.createExporter(Hbm2DDLExporterTask.java:51)
at org.hibernate.tool.ant.ExporterTask.execute(ExporterTask.java:39)
at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.java:186)
... 15 more
Caused by: java.sql.SQLException: No suitable driver found for jdbc:mysql:3306//localhost/db
at java.sql.DriverManager.getConnection(DriverManager.java:602)
at java.sql.DriverManager.getConnection(DriverManager.java:154)
at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:133)
at org.hibernate.cfg.reveng.dialect.AbstractMetaDataDialect.getConnection(AbstractMetaDataDialect.java:122)
at org.hibernate.cfg.reveng.dialect.AbstractMetaDataDialect.getMetaData(AbstractMetaDataDialect.java:61)
... 29 more
--- Nested Exception ---
org.hibernate.exception.JDBCConnectionException: Getting database metadata
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:97)
at org.hibernate.cfg.reveng.dialect.AbstractMetaDataDialect.getMetaData(AbstractMetaDataDialect.java:64)
at org.hibernate.cfg.reveng.dialect.AbstractMetaDataDialect.caseForSearch(AbstractMetaDataDialect.java:163)
at org.hibernate.cfg.reveng.dialect.JDBCMetaDataDialect.getTables(JDBCMetaDataDialect.java:22)
at org.hibernate.cfg.reveng.JDBCReader.processTables(JDBCReader.java:476)
at org.hibernate.cfg.reveng.JDBCReader.readDatabaseSchema(JDBCReader.java:74)
at org.hibernate.cfg.reveng.JDBCReader.readDatabaseSchema(JDBCReader.java:860)
at org.hibernate.cfg.JDBCBinder.readDatabaseSchema(JDBCBinder.java:115)
at org.hibernate.cfg.JDBCBinder.readFromDatabase(JDBCBinder.java:88)
at org.hibernate.cfg.JDBCMetaDataConfiguration.readFromJDBC(JDBCMetaDataConfiguration.java:42)
at org.hibernate.tool.ant.JDBCConfigurationTask.doConfiguration(JDBCConfigurationTask.java:81)
at org.hibernate.tool.ant.ConfigurationTask.getConfiguration(ConfigurationTask.java:55)
at org.hibernate.tool.ant.HibernateToolTask.getConfiguration(HibernateToolTask.java:302)
at org.hibernate.tool.ant.Hbm2DDLExporterTask.createExporter(Hbm2DDLExporterTask.java:51)
at org.hibernate.tool.ant.ExporterTask.execute(ExporterTask.java:39)
at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.java:186)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:357)
at org.apache.tools.ant.Target.performTasks(Target.java:385)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329)
at org.apache.tools.ant.Project.executeTarget(Project.java:1298)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.eclipse.ant.internal.ui.antsupport.EclipseDefaultExecutor.executeTargets(EclipseDefaultExecutor.java:32)
at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.run(InternalAntRunner.java:423)
at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.main(InternalAntRunner.java:137)
Caused by: java.sql.SQLException: No suitable driver found for jdbc:mysql:3306//localhost/db
at java.sql.DriverManager.getConnection(DriverManager.java:602)
at java.sql.DriverManager.getConnection(DriverManager.java:154)
at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:133)
at org.hibernate.cfg.reveng.dialect.AbstractMetaDataDialect.getConnection(AbstractMetaDataDialect.java:122)
at org.hibernate.cfg.reveng.dialect.AbstractMetaDataDialect.getMetaData(AbstractMetaDataDialect.java:61)
... 29 more
I use mysql and my jdbc properties are:
hibernate.dialect=org.hibernate.dialect.MySQLInnoDBDialect
hibernate.connection.driver_class=com.mysql.jdbc.Driver
hibernate.connection.url=jdbc:mysql:3306//localhost/db
hibernate.connection.username=root
hibernate.connection.password=root
hibernate.connection.show_sql=true
My jdbc mysql driver is in ${core.lib.server}: mysql-connector-java-5.1.7-bin.jar
(also tried to put in classpath <fileset dir="/home/slorber/workspace/core/lib/server" includes="*.jar" />)
Also added it to the run configuration classpath of Ant (eclipse plugin).
So my questions are:
- Have i done something wrong to do what i want?
- Is it the way you would do to db migrate with an hibernate framework? (and what else would you do if not writing all db changes in hand-made sql files?)
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