Re: [eclipselink-users] How to create J2SE applications with no persiste

[krisusa123 <krisusa123@xxxxxxxxx>]

Hi Ben

I am trying to use this which was developed by Tim for his comics example. But, even this one is looking for a persistence.xml file in my meta-inf directory. Otherwise there is an error like this shown after Tim's code. The error was produced by having a blank persistence.xml file. If I dont have a blank file, the project is throwing errors and does not run.

 

Appreciate your help EclipseTeam!

 

properties.put(PersistenceUnitProperties.TARGET_DATABASE, "Derby");
  properties.put(PersistenceUnitProperties.JDBC_DRIVER,
    "org.apache.derby.jdbc.ClientDriver");
  properties.put(PersistenceUnitProperties.JDBC_URL,
    "jdbc:derby://localhost:1527/sample;create=true");
  properties.put(PersistenceUnitProperties.JDBC_USER, "app");
  properties.put(PersistenceUnitProperties.JDBC_PASSWORD, "app");
  properties
    .put(PersistenceUnitProperties.JDBC_READ_CONNECTIONS_MIN, "1");
  properties.put(PersistenceUnitProperties.JDBC_WRITE_CONNECTIONS_MIN,
    "1");
  // properties.put(PersistenceUnitProperties.CACHE_SHARED_DEFAULT,
  // "true");
  properties.put(PersistenceUnitProperties.BATCH_WRITING, "JDBC");
  properties.put(PersistenceUnitProperties.CLASSLOADER, ComicsEntityManagerFactory.class.getClassLoader());
  properties.put("eclipselink.logging.level", "FINE");
  properties.put("eclipselink.logging.timestamp", "false");
  properties.put("eclipselink.logging.session", "false");
  properties.put("eclipselink.logging.thread", "false");

  emf = new PersistenceProvider().createEntityManagerFactory("comics",
    properties);

 

 

 

 

 

 

Local Exception Stack:

Exception [EclipseLink-30005] (Eclipse Persistence Services - 1.0.2 (Build 20081024)): org.eclipse.persistence.exceptions.PersistenceUnitLoadingException

Exception Description: An exception was thrown while searching for persistence archives with ClassLoader: sun.misc.Launcher$AppClassLoader@133056f

Internal Exception: Exception [EclipseLink-30004] (Eclipse Persistence Services - 1.0.2 (Build 20081024)): org.eclipse.persistence.exceptions.PersistenceUnitLoadingException

Exception Description: An exception was thrown while processing persistence.xml from URL: file:/C:/workspace/Prototype/classes/

Internal Exception:

(1. Premature end of file.)

at org.eclipse.persistence.exceptions.PersistenceUnitLoadingException.exceptionSearchingForPersistenceResources(PersistenceUnitLoadingException.java:121)

at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:117)

at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:64)

at com.xx.entitymanager.EntityManagerProcessor.createEntityManagerFactory(EntityManagerProcessor.java:41)

Caused by: Exception [EclipseLink-30004] (Eclipse Persistence Services - 1.0.2 (Build 20081024)): org.eclipse.persistence.exceptions.PersistenceUnitLoadingException

Exception Description: An exception was thrown while processing persistence.xml from URL: file:/C:/workspace/Prototype/classes/

Internal Exception:

(1. Premature end of file.)

at org.eclipse.persistence.exceptions.PersistenceUnitLoadingException.exceptionProcessingPersistenceXML(PersistenceUnitLoadingException.java:112)

at org.eclipse.persistence.internal.jpa.deployment.PersistenceUnitProcessor.processPersistenceXML(PersistenceUnitProcessor.java:365)

at org.eclipse.persistence.internal.jpa.deployment.PersistenceUnitProcessor.processPersistenceArchive(PersistenceUnitProcessor.java:314)

at org.eclipse.persistence.internal.jpa.deployment.PersistenceUnitProcessor.getPersistenceUnits(PersistenceUnitProcessor.java:237)

at org.eclipse.persistence.internal.jpa.deployment.JPAInitializer.initPersistenceUnits(JPAInitializer.java:146)

at org.eclipse.persistence.internal.jpa.deployment.JPAInitializer.initialize(JPAInitializer.java:135)

at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:104)

... 6 more

--- On Thu, 1/29/09, Ben Horowitz <horowitz2@xxxxxxxx> wrote:

From: Ben Horowitz <horowitz2@xxxxxxxx>
Subject: Re: [eclipselink-users] How to create J2SE applications with no persistence.xml files
To: krisusa123@xxxxxxxxx
Date: Thursday, January 29, 2009, 7:43 PM

You might want to try this (I haven't tried it, but I keep it in mind in
case I need to use it):

org.eclipse.persistence.jpa.PersistenceProvider has a method
createContainerEntityManagerFactory that takes a PersistenceUnitInfo as an
argument (as well as a map of properties).

PersistenceUnitInfo is an interface that allows the specification of a
list of managed class names.

Good luck,
Ben


krisusa123 wrote:
> Hi
> I came into this rare problem of my app admins not ready to put files in
META-INF directory to load persistence file.
>  I found this link from Doug explaining how to do this programatically.
But he still used it finally to specify the following:
>  <persistence-unit name="unit-name">
> <exclude-unlisted-classes>false</exclude-unlisted-classes>
> </persistence-unit>
>  Is there any way we can specify these also programatically.
>  Reason: My persistence unit names change as per my environments and hence
the requirement.
>  Appreciate your inputs.
>  Thanks in advance.
> 
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> eclipselink-users mailing list
> eclipselink-users@xxxxxxxxxxx
> https:// dev.eclipse.org/mailman/listinfo/eclipselink-users