//
// ========================================================================
// Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.rhttp.gateway;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.rhttp.client.RHTTPRequest;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
/**
* The servlet that handles external requests.
*
* @version $Revision$ $Date$
*/
public class ExternalServlet extends HttpServlet
{
private final Logger logger = Log.getLogger(getClass().toString());
private final Gateway gateway;
private TargetIdRetriever targetIdRetriever;
public ExternalServlet(Gateway gateway, TargetIdRetriever targetIdRetriever)
{
this.gateway = gateway;
this.targetIdRetriever = targetIdRetriever;
}
public TargetIdRetriever getTargetIdRetriever()
{
return targetIdRetriever;
}
public void setTargetIdRetriever(TargetIdRetriever targetIdRetriever)
{
this.targetIdRetriever = targetIdRetriever;
}
@Override
protected void service(HttpServletRequest httpRequest, HttpServletResponse httpResponse) throws ServletException, IOException
{
logger.debug("External http request: {}", httpRequest.getRequestURL());
String targetId = targetIdRetriever.retrieveTargetId(httpRequest);
if (targetId == null)
throw new ServletException("Invalid request to " + getClass().getSimpleName() + ": " + httpRequest.getRequestURI());
ClientDelegate client = gateway.getClientDelegate(targetId);
if (client == null) throw new ServletException("Client with targetId " + targetId + " is not connected");
ExternalRequest externalRequest = gateway.newExternalRequest(httpRequest, httpResponse);
RHTTPRequest request = externalRequest.getRequest();
ExternalRequest existing = gateway.addExternalRequest(request.getId(), externalRequest);
assert existing == null;
logger.debug("External request {} for device {}", request, targetId);
boolean delivered = client.enqueue(request);
if (delivered)
{
externalRequest.suspend();
}
else
{
// TODO: improve this: we can temporarly queue this request elsewhere and wait for the client to reconnect ?
throw new ServletException("Could not enqueue request to client with targetId " + targetId);
}
}
}