/*
* Adito
*
* Copyright (C) 2003-2006 3SP LTD. All Rights Reserved
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package com.adito.server.jetty;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.mortbay.http.HttpException;
import org.mortbay.http.HttpRequest;
import org.mortbay.http.HttpResponse;
import org.mortbay.http.handler.AbstractHttpHandler;
import com.adito.boot.RequestHandler;
import com.adito.boot.RequestHandlerException;
import com.adito.boot.SystemProperties;
/**
* Implementation of Jetty's
* {@link org.mortbay.http.handler.AbstractHttpHandler} that adapts requests
* to Adito's own registered {@link com.adito.boot.RequestHandler}
* implementations.
* @see com.adito.boot.RequestHandler
*/
public class RequestHandlerAdapter extends AbstractHttpHandler {
// Package private statics
static Log log = LogFactory.getLog(RequestHandlerAdapter.class);
// Private statics
private static final long serialVersionUID = 4682392114545977296L;
// Private instance variables
private List requestHandlers = new ArrayList();
/**
* <p>
* Add a new {@link RequestHandler}. Every time a request is received that
* is not serviced by the main webapp, each registered handler will be
* invoked until one deals with the request.
*
* <p>
* This shouldn't be called directly, but through
* {@link CustomHttpContext#registerRequestHandler(RequestHandler)}
*
* @param requestHandler handler to add
*/
public void registerRequestHandler(RequestHandler requestHandler) {
if (log.isInfoEnabled())
log.info("Registering request handler " + requestHandler.getClass().getName());
requestHandlers.add(requestHandler);
}
/**
* <p>
* Remove a {@link RequestHandler} so that is no longer received unhandled
* requests. See {@link #registerRequestHandler(RequestHandler)}.
*
* <p>
* This shouldn't be called directly, but through
* {@link CustomHttpContext#deregisterRequestHandler(RequestHandler)}
*
* @param requestHandler handler to remove
*/
public void deregisterRequestHandler(RequestHandler requestHandler) {
if (log.isInfoEnabled())
log.info("De-registering request handler " + requestHandler.getClass().getName());
requestHandlers.remove(requestHandler);
}
/*
* (non-Javadoc)
*
* @see org.mortbay.http.HttpHandler#handle(java.lang.String,
* java.lang.String, org.mortbay.http.HttpRequest,
* org.mortbay.http.HttpResponse)
*/
public void handle(String pathInContext, String pathParams, HttpRequest request, HttpResponse response) throws HttpException,
IOException {
if (log.isDebugEnabled())
log.debug("Request for " + pathInContext);
for (Iterator i = requestHandlers.iterator(); i.hasNext();) {
try {
request.setCharacterEncoding(SystemProperties.get("adito.encoding", "UTF-8"), false);
RequestHandler handler = (RequestHandler) i.next();
ClassLoader oldLoader = Thread.currentThread().getContextClassLoader();
Thread.currentThread().setContextClassLoader(handler.getClass().getClassLoader());
if (handler.handle(pathInContext, pathParams, new RequestAdapter(request), new ResponseAdapter(response))) {
request.setHandled(true);
break;
}
Thread.currentThread().setContextClassLoader(oldLoader);
} catch (RequestHandlerException e) {
log.error("Failed to handle request. Status code " + e.getCode());
throw new HttpException(e.getCode(), e.getMessage());
}
}
}
}