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Posted to dev@velocity.apache.org by da...@locus.apache.org on 2000/11/03 03:45:06 UTC
cvs commit: jakarta-velocity/examples/forumdemo/WEB-INF/src/org/apache/velocity/demo ControllerServlet.java
daveb 00/11/02 18:45:06
Added: examples/forumdemo/WEB-INF/src/org/apache/velocity/demo
ControllerServlet.java
Log:
Initial add.
Revision Changes Path
1.1 jakarta-velocity/examples/forumdemo/WEB-INF/src/org/apache/velocity/demo/ControllerServlet.java
Index: ControllerServlet.java
===================================================================
package org.apache.velocity.demo;
/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Jakarta-Regexp", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
* ITS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
// Java stuff
import java.util.*;
// Servlet stuff
import javax.servlet.*;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
// Velocity stuff
import org.apache.velocity.Context;
import org.apache.velocity.Template;
import org.apache.velocity.servlet.VelocityServlet;
// Demo stuff
import org.apache.velocity.demo.action.*;
/**
* Main entry point into the forum application.
* All requests are made to this servlet.
*
* @author <a href="mailto:daveb@miceda-data.com">Dave Bryson</a>
* @version $Revision: 1.1 $
* $Id: ControllerServlet.java,v 1.1 2000/11/03 02:45:05 daveb Exp $
*/
public class ControllerServlet extends VelocityServlet
{
/**
* VelocityServlet handles most of the Servlet issues.
* By extending it, you need to just implement the handleRequest method.
* @param the Context created in VelocityServlet.
* @return the template
*/
public Template handleRequest( Context ctx )
{
HttpServletRequest req = (HttpServletRequest)ctx.get(VelocityServlet.REQUEST);
HttpServletResponse resp = (HttpServletResponse)ctx.get(VelocityServlet.RESPONSE);
Template template = null;
try
{
// Process the command
String templateName = processRequest( req, resp, ctx );
// Get the template
template = getTemplate( templateName );
}
catch( Exception e )
{
System.out.println("Error handling the request: " + e);
}
return template;
}
/**
* Process the request and execute the command.
* Uses a command pattern
* @param the request
* @param the response
* @param the context
* @return the name of the template to use
*/
private String processRequest( HttpServletRequest req, HttpServletResponse resp, Context context )
throws Exception
{
Command c = null;
String template = null;
String name = req.getParameter("action");
if ( name == null || name.length() == 0 )
{
throw new Exception("Unrecognized action request!");
}
if ( name.equalsIgnoreCase("list") )
{
c = new ListCommand( req, resp);
template = c.exec( context );
}
else if ( name.equalsIgnoreCase("post") )
{
c = new PostCommand( req, resp );
template = c.exec( context );
}
else if ( name.equalsIgnoreCase("reply") )
{
c = new ReplyCommand( req, resp );
template = c.exec( context );
}
else if ( name.equalsIgnoreCase("postreply") )
{
c = new PostReplyCommand( req, resp );
template = c.exec( context );
}
else if ( name.equalsIgnoreCase("view") )
{
c = new ViewCommand( req, resp );
template = c.exec( context );
}
return template;
}
}