/*
 * $Id: EventHandler.java,v 1.1 2008/02/06 10:43:42 linkconsulting Exp $
 *
 * Copyright (c) 2001-2003 The Open For Business Project - www.ofbiz.org
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
 * OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */
package org.ofbiz.webapp.event;

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

/**
 * EventHandler - Event Handler Interface
 *
 * @author     <a href="mailto:jaz@ofbiz.org">Andy Zeneski</a>
 * @author     <a href="mailto:jonesde@ofbiz.org">David E. Jones</a>
 * @version    $Rev: 5462 $
 * @since      2.0
 */

public interface EventHandler {

    /**
     * Initializes the handler. Since handlers use the singleton pattern this method should only be called
     * the first time the handler is used.
     * 
     * @param context ServletContext This may be needed by the handler in order to lookup properties or XML
     * definition files for rendering pages or handler options.
     * @throws EventHandlerException
     */
    public void init(ServletContext context) throws EventHandlerException;

    /**
     * Invoke the web event
     * 
     *@param eventPath The path or location of this event
     *@param eventMethod The method to invoke
     *@param request The servlet request object
     *@param response The servlet response object
     *@return String Result code
     *@throws EventHandlerException
     */
    public String invoke(String eventPath, String eventMethod, HttpServletRequest request, HttpServletResponse response) throws EventHandlerException;
}

