Code Example: Data Transfer Object DTO or Data Beans

hwilliamson — Tue, 17 Jan 2006 23:28:50 +0000

When you are implementing you jdbc layer, you need a solid way to create Data Transfer Objects (DTO’s) or Data Beans . This is the way I implement this.

Data Transfer Object interface.

package dto;

import jdbc.DAObject;

public interface IDTO {

	public void execute() throws Exception;
	public DAObject [] getData();
	public DAObject getFirstRowData();

}

Data Transfer Object. Base class.


package dto;

import java.util.ArrayList;

import jdbc.DAObject;
import jdbc.JDBCSessionAccessor;
import jdbc.JDBCSessionAccessorHome;
import jndi.JNDILocator;
import jndi.JNDILookupNames;

abstract public class DTO implements IDTO{

	DAObject [] data;

	public void runQuery(String query, ArrayList list ) throws Exception
	{
		JNDILocator jndi = JNDILocator.getJNDILocator();
		JDBCSessionAccessorHome home  = (JDBCSessionAccessorHome) jndi.getJNDIObject(JNDILookupNames.JDBCSESSIONBEAN);
		JDBCSessionAccessor	jdbc = home.create();
		DAObject [] rset = (DAObject []) jdbc.query(query,list.toArray());

		if (rset !=null)
		{
			data = rset;
		}
	}

	public DAObject getFirstRowData()
	{
		if (data !=null && data[0] != null)
		{
			return data[0];
		}
		return null;
	}

	/**
	 * @return Returns the data.
	 */
	public DAObject [] getData() {
		return data;
	}
	/**
	 * @param data The data to set.
	 */
	public void setData(DAObject [] p_data) {
		this.data = p_data;
	}

}

Data Transfer Object. Example quey implementation


package dto;

import java.util.ArrayList;

class DTOTable1  extends DTO {

	public static String COLUMN1 = "column1";
	public static String FIELD_QUERY = "SELECT  column1  FROM table1 where field1 = ?"; 

	private String field;

	public DTOTable1 ()
	{

	}

	public String getField() {
		return eventMessageId;
	}

	public void setField(String rowId) {
		field= rowId;
	}
	public LabelType(String p_field)
	{
		field=p_field;
	}
	public void execute() throws Exception
	{
		ArrayList list = new ArrayList();
		list.add(getField());
		runQuery(FIELD_QUERY,list);

	}

A use to use it…..

DTOTable1 label =  new DTOTable1();
label.setField("somevalue");
label.execute();
String lableType =(String) label.getFirstRowData().getProperty(DTOTable1.COLUMN1);

java,code samples, example,jdbc, example,dto

Configuring JDBC data source/JNDI name in Rational application development Environment 6.0 for Oracle

hwilliamson — Sat, 07 Jan 2006 00:00:26 +0000

Configuring the JDBC jndi name in RAD ia a lot harder than it needs to be.
Here is how to do it.

1. View the J2EE perspective
2. Under “Enterprise Applications” click on your EAR folder
3. Under META-INF
4. Double click “application.xml”. This allows you to edit the deployment descriptor.
5. Click on the deployment tab.
6. Now scroll down to the bottom of the window, and you will see arrow to the left of the word “Authentication”, click it.
7. You should now see the JAAS authentication list
8. Click “add”, fill out

9. Now under your “server” tab, deploy/publish your EAR and start your the Websphere 6.0 development environment
10. Right click the server and select “Run the administration console”. This will start admin console in a new window.
11. Click Login (any login will work)
12. Click “Resources”
13. Click “JDBC Providers”
14. Scroll to bottom of display and click “new”, and fill out the following fields

15. Now from the JDBC provider window click “Oracle JDBC Driver” which you just created.
16. Now on the right side of the window under “Additional properties”, click “data sources”.
17. Click “new”, and fill out the following fields

18. Now under your “serv

er” tab, deploy/publish your EAR and restart your the Websphere 6.0 development environment.

Great Tasting Java » JDBC

Code Example: Data Transfer Object DTO or Data Beans

Configuring JDBC data source/JNDI name in Rational application development Environment 6.0 for Oracle