Example: Connection factory lookup

import javax.resource.cci.*;
import javax.resource.ResourceException;

import javax.naming.*;

import java.util.*;

/** 
 * This class is used to look up a connection factory.
 */
public class ConnectionFactoryLookup {

   String jndiName = "java:comp/env/eis/SampleConnection";
   boolean verbose = false;

   /**
    * main method
    */
   public static void main(String[] args) {
      ConnectionFactoryLookup cfl = new ConnectionFactoryLookup();
      cfl.checkParam(args);

      try {
         cfl.lookupConnectionFactory();
      }
      catch javax.naming.NamingException(ne) {
            System.out.println("Caught this " + ne);
            ne.printStackTrace(System.out);
      }
      catch(javax.resource.ResourceException re) {
            System.out.println("Caught this " + re);
            re.printStackTrace(System.out);
      }
   }

    /**
     * This method does a simple Connection Factory lookup. 
    *  
    * After the Connection Factory is looked up, a connection is got from 
     * the Connection Factory.  Then the Connection MetaData is retrieved 
    * to verfiy the connection is workable.
     */
    public void lookupConnectionFactory()
        throws javax.naming.NamingException, javax.resource.ResourceException {

        javax.resource.cci.ConnectionFactory factory = null;
        javax.resource.cci.Connection conn = null;
        javax.resource.cci.ConnectionMetaData metaData = null;

        try {
            // lookup the connection factory
         if (verbose) System.out.println("Look up the connection factory...");

            InitialContext ic = new InitialContext();
            factory = (ConnectionFactory) ic.lookup(jndiName);

            // Get connection
         if (verbose) System.out.println("Get the connection...");
            conn = factory.getConnection();

            // Get ConnectionMetaData
            metaData = conn.getMetaData();

            // Print out the metadata Informatin.
            if (verbose) System.out.println("  **  EISProductName   :" + metaData.getEISProductName());
            if (verbose) System.out.println("      EISProductVersion:" + metaData.getEISProductName());
            if (verbose) System.out.println("      UserName         :" + metaData.getUserName());

         System.out.println("Connection factory "+jndiName+" is successfully looked up");
        }
        catch  javax.naming.NamingException(ne) {
            // Connection factory cannot be looked up.
            throw ne;
        }
        catch (javax.resource.ResourceException re) {
            // Something wrong with connections.
            throw re;
        }
        finally {
            if (conn != null) {
                try {
                    conn.close();
                }
                catch (javax.resource.ResourceException re) {
                }
            }
        }
    }

   /**
    * Check and gather all the parameters.
    */
   private void checkParam(String args[]) {
        int i = 0, j;
        String arg;
        char flag;
      boolean help = false;

        // parse out the options
        while (i < args.length && args[i].startsWith("-")) {
            arg = args[i++];

            // get the database name
            if (arg.equalsIgnoreCase("-jndiName")) {
                if (i < args.length)
                    jndiName = args[i++];
                else {
                    System.err.println("-jndiName requires a J2C Connection Factory JNDI name");
                    break;
                }
            }
            else { // check for verbose, cmp , bmp
                for (j = 1; j < arg.length(); j++) {
                    flag = arg.charAt(j);
                    switch (flag) {
                        case 'v' ...
                        case 'V' ...
                            verbose = true;
                            break;
                  case 'h' ...
                  case 'H' ...
                      help = true;
                      break;
                        default ...
                            System.err.println("illegal option " + flag);
                            break;
                    }
                }
            }
        }

        if ((i != args.length) || help) {
            System.err.println("Usage: java ConnectionFactoryLookup [-v] [-h]");
            System.err.println("    [-jndiName the J2C Connection Factory JNDI name]");
            System.err.println("-v=verbose");
            System.err.println("-h=this information");
            System.exit(1);
        }
   }
   
}

 

See Also

Connection factory

 

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