[jboss-jira] [JBoss JIRA] Created: (JBAS-7474) create a new persistence unit programmatically and map it to a new datasource without redeploy or server restart

[Dave Chen (JIRA)]

create a new persistence unit programmatically and map it to a new datasource without redeploy or server restart
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                 Key: JBAS-7474
                 URL: https://jira.jboss.org/jira/browse/JBAS-7474
             Project: JBoss Application Server
          Issue Type: Feature Request
      Security Level: Public (Everyone can see)
          Components: Hibernate service
    Affects Versions: JBossAS-5.1.0.GA
         Environment: JBoss 5.1.0.GA
            Reporter: Dave Chen
            Assignee: Steve Ebersole


Currently we use the persistence.xml to map a persistenceUnit to data source. Our application got a requirement: 

create a new persistence unit programmatically and map it to a new datasource without redeploy or server restart. How to achieve this functionality? 

EntityManagerFactory emf = Persistence.createEntityManagerFactory("manager1");
//or
Map configOverrides = new HashMap();
configOverrides.put("hibernate.hbm2ddl.auto", "create-drop");
EntityManagerFactory programmaticEmf =
    Persistence.createEntityManagerFactory("manager1", configOverrides);

But the persistence unit "manager1" needs to be defined in persistence.xml.

What we need is:

EntityManagerFactory emf = Persistence.createEntityManagerFactory("foo", "dataSourceName");
the persistence unit "foo" is not defined in any persistence.xml.


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