How to access database connection from datatsource in a standalone java ap

Question

My java standalone application wants connection to database with lookup to datasource name which is configured in the oc4j app server.
Please guide me with some ideas to acheieve this.

Answer 1

user510497,
Following sample program requires access to classes in "oc4j.jar" file.
Test environment:
* Server:
+ OC4J stand-alone 10.1.2.0.2
+ Red Hat Enterprise Linux AS release 3
+ Java HotSpot(TM) Client VM (build 1.4.2_08-b03, mixed mode)
+ Oracle Database 10g Release 10.1.0.4.0 - 64bit Production
* Client
+ Microsoft Windows XP Professional Version 2002 Service Pack 2
+ Java HotSpot(TM) Client VM (build 1.5.0_08-b03, mixed mode, sharing)
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.SQLException;
import java.util.Properties;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
public class DataSrc2 {
  public static void main(String[] args) {
    Connection conn = null;
    Properties l_props = new Properties();
    l_props.put(Context.INITIAL_CONTEXT_FACTORY,
                "com.evermind.server.rmi.RMIInitialContextFactory");
    l_props.put(Context.PROVIDER_URL, "ormi://your_OC4J_host/");
    l_props.put(Context.SECURITY_PRINCIPAL, "your_OC4J_user");
    l_props.put(Context.SECURITY_CREDENTIALS, "your_OC4J_password");
    Context l_jndiContext = null;
    try {
      l_jndiContext = new InitialContext(l_props);
      Object l_obj = l_jndiContext.lookup("default-data-source");
      DataSource ds = (DataSource) l_obj;
      conn = ds.getConnection("scott","tiger");
      DatabaseMetaData dbmd = conn.getMetaData();
      System.out.println(dbmd.getDatabaseProductVersion());
    catch (NamingException x_naming) {
      x_naming.printStackTrace();
    catch (SQLException xSql) {
      xSql.printStackTrace();
    finally {
      if (l_jndiContext != null) {
        try {
          l_jndiContext.close();
        catch (NamingException x_naming) {
          System.err.println("Failed to close JNDI context.");
          x_naming.printStackTrace();
      if (conn != null) {
        try {
          conn.close();
        catch (SQLException xSql) {
          System.err.println("Failed to close [database] connection.");
          xSql.printStackTrace();
}NOTES:
1. Datasource lookup name is value of "default-data-source" attribute of "orion-application" element in file:
<OC4J_HOME>/j2ee/home/config/application.xmlGood Luck,
Avi.