[hibernate-issues] [Hibernate-JIRA] Assigned: (HHH-6003) Envers fails when an entity has dynamic-component

[Gail Badner (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-6003?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gail Badner reassigned HHH-6003:
--------------------------------

    Assignee: Gail Badner

> Envers fails when an entity has dynamic-component
> -------------------------------------------------
>
>                 Key: HHH-6003
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6003
>             Project: Hibernate Core
>          Issue Type: Bug
>          Components: envers
>    Affects Versions: 3.6.0
>         Environment: Windows 7, java version "1.6.0_18" (32 bit), hibernate-core-3.6.0.Final, mysql-5.1.45-win32
>            Reporter: Rajeev
>            Assignee: Gail Badner
>         Attachments: myproject.tar
>
>
> hi,
> Am working with hibernate version 3.6.0.Final. Envers fails during initialization when an entity has dynamic-component.
> Hibernate.cfg.xml -
> <hibernate-configuration>
> <session-factory>
> <!-- Database connection settings -->
> <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
> <property name="connection.url">jdbc:mysql://localhost/company?createDatabaseIfNotExist=true&amp;useUnicode=true&amp;characterEncoding=utf-8</property>
> <property name="connection.username">root</property>
> <property name="connection.password">root</property>
> <!-- JDBC connection pool (use the built-in) -->
> <property name="connection.pool_size">1</property>
> <property name="dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>
> <!-- Enable Hibernate's automatic session context management -->
> <property name="current_session_context_class">thread</property>
> <!-- Disable the second-level cache -->
> <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
> <!-- Echo all executed SQL to stdout -->
> <property name="show_sql">true</property>
> <!-- Drop and re-create the database schema on startup -->
> <property name="hbm2ddl.auto">create</property>
> </session-factory>
> </hibernate-configuration>
> There is only 1 entity in this test case -
> Employee.java:
> import ...
> @Audited
> public class Employee implements java.io.Serializable {
> private Long id;
> private String name ;
> @NotAudited
> private Map customProperties = new HashMap(); // maps to dynamic-component
> .. getter/setter ...
> Hibernate mapping (using xml as dynamic-component is not available as annotation)
> <hibernate-mapping default-access="property">
> <class name="com.company.domain.Employee" table="EMPLOYEE">
> <id name="id" column="id">
> <generator class="native"/>
> </id>
> <property name="name" type="string" column="name" length="255" not-null="false"/>
> <dynamic-component insert="true" name="customProperties" optimistic-lock="true" unique="false" update="true" >
> </dynamic-component>
> </class>
> </hibernate-mapping>
> HibernateUtil -
> private static SessionFactory buildSessionFactory() {
> try {
> // Create the SessionFactory from hibernate.cfg.xml
> AuditEventListener auditEventListener = new AuditEventListener();
> Configuration configuration = new Configuration();
> configuration.getEventListeners().setPostInsertEventListeners(new PostInsertEventListener[]{auditEventListener});
> configuration.getEventListeners().setPostUpdateEventListeners(new PostUpdateEventListener[]{auditEventListener});
> configuration.getEventListeners().setPostDeleteEventListeners(new PostDeleteEventListener[]{auditEventListener});
> return configuration.configure().buildSessionFactory();
> }
> catch (Throwable ex) {
> // Make sure you log the exception, as it might be swallowed
> System.err.println("Initial SessionFactory creation failed." + ex);
> throw new ExceptionInInitializerError(ex);
> }
> Main class -
> public class App
> {
> public static void main( String[] args )
> {
> System.out.println( "Hello World!" );
> App app = new App();
> app.createAndStore();
> app.createAndStoreVersion();
> HibernateUtil.getSessionFactory().close();
> }
> private void createAndStore() {
> Session session = HibernateUtil.getSessionFactory().getCurrentSession();
> session.beginTransaction();
> Employee emp = new Employee();
> emp.setName("name");
> session.save(emp);
> session.getTransaction().commit();
> }
> private void createAndStoreVersion() {
> Session session = HibernateUtil.getSessionFactory().getCurrentSession();
> session.beginTransaction();
> Employee emp = (Employee) session.get(Employee.class, 1L);
> emp.setName("updated name");
> session.save(emp);
> session.getTransaction().commit();
> }
> }
> Initialization fails, log is:
> Caused by: java.lang.NullPointerException
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Class.java:247)
> at org.hibernate.annotations.common.util.ReflectHelper.classForName(ReflectHelper.java:143)
> at org.hibernate.annotations.common.reflection.java.JavaReflectionManager.classForName(JavaReflectionManager.java:117)
> at org.hibernate.envers.configuration.metadata.reader.AuditedPropertiesReader$ComponentPropertiesSource.<init>(AuditedPropertiesReader.java:269)
> at org.hibernate.envers.configuration.metadata.reader.AuditedPropertiesReader$ComponentPropertiesSource.<init>(AuditedPropertiesReader.java:263)
> at org.hibernate.envers.configuration.metadata.reader.AuditedPropertiesReader.addFromProperties(AuditedPropertiesReader.java:105)
> at org.hibernate.envers.configuration.metadata.reader.AuditedPropertiesReader.addPropertiesFromClass(AuditedPropertiesReader.java:89)
> at org.hibernate.envers.configuration.metadata.reader.AuditedPropertiesReader.read(AuditedPropertiesReader.java:67)
> at org.hibernate.envers.configuration.metadata.reader.AnnotationsMetadataReader.getAuditData(AnnotationsMetadataReader.java:114)
> at org.hibernate.envers.configuration.EntitiesConfigurator.configure(EntitiesConfigurator.java:80)
> at org.hibernate.envers.configuration.AuditConfiguration.<init>(AuditConfiguration.java:97)
> at org.hibernate.envers.configuration.AuditConfiguration.getFor(AuditConfiguration.java:129)
> at org.hibernate.envers.event.AuditEventListener.initialize(AuditEventListener.java:335)
> at org.hibernate.event.EventListeners$1.processListener(EventListeners.java:198)
> at org.hibernate.event.EventListeners.processListeners(EventListeners.java:181)
> at org.hibernate.event.EventListeners.initializeListeners(EventListeners.java:194)
> ... 6 more
> After some debugging I found that a dynamic-component doesn't have class attribute (it is always java.util.HashMap), envers tries to look it up and fails.
> Secondly, I coudln't figure out how to attach envers listeners via hibernate.cfg.xml, so used run time configuration.
> All the three approaches failed -
> 1. <property name="hibernate.ejb.event.post-insert">org.hibernate.ejb.event.EJB3PostInsertEventListener,org.hibernate.envers.event.AuditEventListener</property>
> 2. <listener class="org.hibernate.envers.event.AuditEventListener" type="post-insert"/> (DTD validation fails)
> 3. <event type="post-insert">
> <listener class="org.hibernate.envers.event.AuditEventListener"/>
> </event> (DTD validation fails).
> Also tracked in forum - https://forum.hibernate.org/viewtopic.php?f=1&t=1009975
> Junit to reproduce this scenario is attached. Execute App.java, you'll need mysql.
> regards,
> Rajeev

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