Use DataSource of weblogic in a standalone Java file

Question

Hi,
We have a requirement to run a java file at a scheduled time in a day using cron scheduler on our linux server.
We need to fetch data from the database & perform some business logic in this standalone JAVA file.
Our application has an EAR which is deployed on Weblogic 10.3 server & in our application, we are utilizing the datasource created in that domain using Hibernate.
Now, can we create a standealone Java file & use exisitng datasource (without Hibernate) instead of legacy JDBC code to connect to DB.
Also, do we need to keep this JAVA file a part of this EAR, WAR or can we put the class file in anylocation outside this EAR & then utilize datasource feature.
Please help on the same in implementation.
Thanks,
Uttam

Answer 1

Hi Ravi,
I did create Datasource domain & put wlclient.jar in my application classpath (Add jar in Java Build path of application), but, when I ran application, its giving below error
Exception in thread "Main Thread" java.lang.NoClassDefFoundError: weblogic/kernel/KernelStatus
     at weblogic.jndi.Environment.<clinit>(Environment.java:78)
     at weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialContextFactory.java:117)
     at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:667)
     at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:288)
     at javax.naming.InitialContext.init(InitialContext.java:223)
     at javax.naming.InitialContext.<init>(InitialContext.java:198)
     at TestDataSource.main(TestDataSource.java:37)
Also, I'm putting code here as I there is no provision to attach the file here. Please let me know whats wrong here.
Also, I've given the name of datasource as testDataSource through Admin console of the domain. Do we need to prefix the name with jdbc/ in the code or without that also it works?
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
public class TestDataSource {
     public static void main(String[] args)
          DataSource ds=null;
          Connection conn=null;
          Statement stmt=null;
          ResultSet rs=null;
          Context ctx=null;
          try
               Hashtable ht = new Hashtable();
               ht.put(Context.INITIAL_CONTEXT_FACTORY,
               "weblogic.jndi.WLInitialContextFactory");
               ht.put(Context.PROVIDER_URL,
               "t3://172.19.244.180:7001");
               System.out.println("HERE");
               ctx=new InitialContext(ht);
               ds=(DataSource)ctx.lookup("jdbc/testDataSource");
               System.out.println("HERE AFER CONTEXT CREATION");
               conn=ds.getConnection();
               stmt=conn.createStatement();
               rs=stmt.executeQuery("select distinct(circle) from AIRCEL_STORE_FINDER order by 1 ");
               while (rs.next())
                    System.out.println("circle name "+rs.getString(1));
          }catch (Exception e) {
               System.out.println("Error in Main "+e.toString());
               e.printStackTrace();
          finally{
               try{
               if(rs!=null)
                    rs.close();
               if(stmt!=null)
                    stmt.close();
               if(conn!=null)
                    conn.close();
               if(ds!=null)
                    ds=null;
               if(ctx!=null)
                    ctx.close();
               }catch (SQLException e) {
                    System.out.println("Error in SQLException Finally "+e.toString());
               catch (NamingException e) {
                    System.out.println("Error in NamingException Finally "+e.toString());
}