/*
* $Header: /export/home/cvsroot/MyPersonalizerRepository/MyPortal/Sources/es/udc/myportal/services/stocknews/controller/StockNewsAction.java,v 1.1.1.1 2004/03/25 12:10:42 fbellas Exp $
* $Revision: 1.1.1.1 $
* $Date: 2004/03/25 12:10:42 $
*
* =============================================================================
*
* Copyright (c) 2003, The MyPersonalizer Development Group
* (http://www.tic.udc.es/~fbellas/mypersonalizer/index.html) at
* University Of A Coruna
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* - Neither the name of the University Of A Coruna nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
package es.udc.myportal.services.stocknews.controller;
import java.util.Collection;
import java.util.ArrayList;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import es.udc.mypersonalizer.kernel.
controller.actions.DefaultAction;
import es.udc.mypersonalizer.kernel.util.exceptions.
InternalErrorException;
import es.udc.myportal.services.stocknews.model.delegate.
StockNewsFacadeDelegate;
import es.udc.myportal.services.stocknews.model.delegate.
MyPortalStockNews;
/**
* Controller action for the implementation of the Stock News service
* proxy. It retrieves the <code>STOCK_NEWS_SYMBOLS_PARAMETER</code> and
* <code>STOCK_NEWS_MAXHEADLINES_PARAMETER</code> parameters from the request
* and invokes the remote service using a local facade. After the above it
* forwards to local JSP page that formats the service response to HTML.
*
* @author Abel Iago Toral Quiroga
* @author Fernando Bellas
* @since 1.0
*/
public class StockNewsAction extends DefaultAction {
/** A constant for the service stock symbols parameter name */
static final String STOCK_NEWS_SYMBOLS_PARAMETER =
"symbols";
/**
* A constant for the service maximun number of headlines
* parameter name
*/
static final String STOCK_NEWS_MAXHEADLINES_PARAMETER =
"maxHeadlines";
protected ActionForward doExecute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
/* Get parameters from the request */
String[] symbols =
(String[]) request.getParameterValues(STOCK_NEWS_SYMBOLS_PARAMETER);
String maxHeadlinesAsString =
(String) request.getParameter(STOCK_NEWS_MAXHEADLINES_PARAMETER);
int maxHeadlines = Integer.parseInt(maxHeadlinesAsString);
if (symbols == null) { // No symbols selected
return mapping.findForward("StockNewsJSP");
} else {
/* Adapt parameters as required by the local service facade */
Collection symbolsAsCollection = new ArrayList();
for (int i=0; i<symbols.length; i++) {
symbolsAsCollection.add(symbols[i]);
}
/* Invoke the remote service using the local service facade */
StockNewsFacadeDelegate stockNewsFacade =
new StockNewsFacadeDelegate();
Collection stockNews = stockNewsFacade.getStockNews(
symbolsAsCollection, maxHeadlines);
/* Format response */
request.setAttribute("stockNews", stockNews);
request.setAttribute("maxHeadlines", new Integer(maxHeadlines));
return mapping.findForward("StockNewsJSP");
}
}
}