musiclistaction.java

the musiccollection struts 1 application i netbeans implementation (strut for dummies book source)

package dummies.struts.music;

import java.util.Collection;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.DynaActionForm;

/**
 * @author Mike Robinson
 *
 */
public class MusicListAction extends Action 
{
	Log log = LogFactory.getLog(MusicListAction.class);	// commons logging reference
	
	/**
	 * Handles request from user
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @throws Exception
	 */
	public ActionForward execute( 	ActionMapping mapping,
									ActionForm form,
									HttpServletRequest request,
									HttpServletResponse response)
									throws Exception
	{
		// deterine the action. choices should be null, add, or logoff
		String action = (String)((DynaActionForm)form).get("action");
		if((action == null)|(action.equals(""))) 	
		{
			// get the session object
			HttpSession session = request.getSession();
			
			// get the user object
			UserDTO user = (UserDTO)session.getAttribute("user");
			
			// create a new LoginBean passing the datasource
			MusicListBean mlb = new MusicListBean(getDataSource(request, "musiccollection"));
			// get the music records for the user
			Collection ml = mlb.getMusic(user);
	
			// save MusicDTO collection in session
			session.setAttribute("musiclist",ml);
		}
		else if (action.equalsIgnoreCase("add"))	// add a new album
		{
			//((DynaActionForm)form).set("action","");
			//return new ActionForward("/album.do",false);
			return (mapping.findForward("newalbum"));
		}
		else if (action.equalsIgnoreCase("logoff"))	// logoff
		{
			//return new ActionForward("logoff.do",true);
			return (mapping.findForward("logoff"));
		}
		return (mapping.findForward("success"));
	}
}