我用:Db的迁移 - 休眠/ JPA - 就是hbm2ddl - 差异工具
- EJB3/JPA(休眠)
- MySQL的5
我必须建立一个系统,以帮助数据库迁移。试过使用LiquiBase,但它似乎还不够成熟,但与Hibernate一起使用。
我想什么做的是:
- 我有1.0版应用程序在生产
- 我开发的应用程序的2.0版本和测试
- 我想更新应用程序数据库在生产过程中没有丢失数据
其实我想用新的persistence.xml
和生产数据库能够生成“三角洲”之间旧数据库和新数据库。我希望能够检索hbm2ddl处于“更新”模式时执行的SQL代码。
此SQL代码将被修改(drop + create = rename等...),以避免丢失可能与hbm2ddl.auto=update
发生的数据。
我想这是可能的,因为Hibernate在部署hbm2ddl.auto=update
的新版本时会这样做。但我希望能够在与hibernatetool
的Ant任务中执行此操作。
我没有在互联网上找到关于此的许多信息,所以我想知道是否有人已经在这里做了类似的事情,可以帮助我。
我已经做了以下内容:
<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>
我真的不知道该怎么办,我是能够得到创建SQL文件,但我只是想三角洲。 我必须把更新=“真”? 我可以在应用程序服务器之外使用持久性单元的jpaconfig(db设置在Glassfish上的JNDI资源上设置)。 (试过,它只是找不到数据库)
我也尝试<jdbcconfiguration propertyfile="hibtest.properties"></jdbcconfiguration>
或设置persistence.xml
数据库的属性,而不是使用JNDI资源。
我得到了以下错误:
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
我使用MySQL和我的JDBC属性是:
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
我的JDBC MySQL驱动是${core.lib.server}: mysql-connector-java-5.1.7-bin.jar
。 (我也尝试把类路径<fileset dir="/home/slorber/workspace/core/lib/server" includes="*.jar" />
。)
我也将它添加到Ant(Eclipse插件)的运行配置类路径。
所以我的问题是:
- 难道我做错了什么事做我想要什么?
- 这是你将使用Hibernate框架进行数据库迁移的方式吗? (如果不是在手工制作的SQL文件中编写所有数据库更改,您还会做什么?)
有趣,我最阅读的线程之一,而不是任何+1:D – 2011-11-17 00:25:00