wamblee.org Git - utils/blob

   1 /*
   2  * SCJD assignment, URLyBird, Erik Brakkee.
   3  * Candidate ID: sr1399267.
   4  */
   5 package org.wamblee.support.persistence.eclipselink;
   6
   7 import org.eclipse.persistence.config.SessionCustomizer;
   8 import org.eclipse.persistence.sessions.DatabaseLogin;
   9 import org.eclipse.persistence.sessions.JNDIConnector;
  10 import org.eclipse.persistence.sessions.Session;
  11 import org.eclipse.persistence.sessions.server.ServerSession;
  12
  13 import javax.naming.Context;
  14 import javax.naming.InitialContext;
  15
  16 /**
  17  * See http://wiki.eclipse.org/Customizing_the_EclipseLink_Application_(ELUG)
  18  * Use for clients that would like to use a JTA SE pu instead of a
  19  * RESOURCE_LOCAL SE pu. This utility also makes sure that using a
  20  * persistence.xml with a JTA datasource works in a standalone Java SE
  21  * environment together with our JNDI stub.
  22  */
  23 public class JndiSessionCustomizer implements SessionCustomizer {
  24     /**
  25      * Creates a new JndiSessionCustomizer object.
  26      */
  27     public JndiSessionCustomizer() {
  28         // Empty.
  29     }
  30
  31     /**
  32      * Get a dataSource connection and set it on the session with
  33      * lookupType=STRING_LOOKUP
  34      *
  35      *
  36      */
  37     public void customize(Session session) throws Exception {
  38         JNDIConnector connector = null;
  39         Context context = null;
  40
  41         try {
  42             context = new InitialContext();
  43
  44             if (null != context) {
  45                 connector = (JNDIConnector) session.getLogin().getConnector(); // possible
  46                                                                                // CCE
  47                 // Change from COMPOSITE_NAME_LOOKUP to STRING_LOOKUP
  48                 // Note: if both jta and non-jta elements exist this will only
  49                 // change the first one - and may still result in
  50                 // the COMPOSITE_NAME_LOOKUP being set
  51                 // Make sure only jta-data-source is in persistence.xml with no
  52                 // non-jta-data-source property set
  53
  54                 connector.setLookupType(JNDIConnector.STRING_LOOKUP);
  55
  56                 // Or, if you are specifying both JTA and non-JTA in your
  57                 // persistence.xml then set both connectors to be safe
  58                 JNDIConnector writeConnector = (JNDIConnector) session
  59                     .getLogin().getConnector();
  60                 writeConnector.setLookupType(JNDIConnector.STRING_LOOKUP);
  61
  62                 JNDIConnector readConnector = (JNDIConnector) ((DatabaseLogin) ((ServerSession) session)
  63                     .getReadConnectionPool().getLogin()).getConnector();
  64                 readConnector.setLookupType(JNDIConnector.STRING_LOOKUP);
  65
  66                 System.out.println("JndiSessionCustomizer: configured " +
  67                     connector.getName());
  68             } else {
  69                 throw new Exception("JndiSessionCustomizer: Context is null");
  70             }
  71         } catch (Exception e) {
  72             e.printStackTrace();
  73         }
  74     }
  75 }