001 /**
002 * GRANITE DATA SERVICES
003 * Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 * This file is part of the Granite Data Services Platform.
006 *
007 * Granite Data Services is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * Granite Data Services is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015 * General Public License for more details.
016 *
017 * You should have received a copy of the GNU Lesser General Public
018 * License along with this library; if not, write to the Free Software
019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020 * USA, or see <http://www.gnu.org/licenses/>.
021 */
022 package org.granite.gravity.jetty;
023
024 import java.io.IOException;
025
026 import javax.servlet.ServletException;
027 import javax.servlet.http.HttpServletRequest;
028 import javax.servlet.http.HttpServletResponse;
029
030 import org.granite.gravity.*;
031 import org.granite.logging.Logger;
032 import org.mortbay.jetty.RetryRequest;
033 import org.mortbay.util.ajax.Continuation;
034 import org.mortbay.util.ajax.ContinuationSupport;
035
036 import flex.messaging.messages.AsyncMessage;
037 import flex.messaging.messages.Message;
038
039 /**
040 * @author William DRAI
041 */
042 public class GravityJettyServlet extends AbstractGravityServlet {
043
044 private static final long serialVersionUID = 1L;
045
046 private static final Logger log = Logger.getLogger(GravityJettyServlet.class);
047
048
049 @Override
050 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
051
052 log.debug("doPost: from %s:%d", request.getRemoteAddr(), request.getRemotePort());
053
054 rejectJMFContentType(request);
055
056 Gravity gravity = GravityManager.getGravity(getServletContext());
057 ContinuationChannelFactory channelFactory = new ContinuationChannelFactory(gravity);
058
059 try {
060 // Setup context (thread local GraniteContext, etc.)
061 initializeRequest(gravity, request, response);
062
063 AsyncMessage connect = getConnectMessage(request);
064
065 // Resumed request (pending messages or timeout).
066 if (connect != null) {
067 String channelId = (String)connect.getClientId();
068 ContinuationChannel channel = gravity.getChannel(channelFactory, channelId);
069
070 // Reset channel continuation instance and deliver pending messages.
071 synchronized (channel) {
072 channel.close();
073 channel.runReceived(new AsyncHttpContext(request, response, connect));
074 }
075
076 return;
077 }
078
079 // New Request.
080 Message[] amf3Requests = deserialize(gravity, request);
081
082 log.debug(">> [AMF3 REQUESTS] %s", (Object)amf3Requests);
083
084 Message[] amf3Responses = null;
085
086 boolean accessed = false;
087 for (int i = 0; i < amf3Requests.length; i++) {
088 Message amf3Request = amf3Requests[i];
089
090 // Ask gravity to create a specific response (will be null with a connect request from tunnel).
091 Message amf3Response = gravity.handleMessage(channelFactory, amf3Request);
092 String channelId = (String)amf3Request.getClientId();
093
094 // Mark current channel (if any) as accessed.
095 if (!accessed)
096 accessed = gravity.access(channelId);
097
098 // (Re)Connect message from tunnel.
099 if (amf3Response == null) {
100 if (amf3Requests.length > 1)
101 throw new IllegalArgumentException("Only one request is allowed on tunnel.");
102
103 ContinuationChannel channel = gravity.getChannel(channelFactory, channelId);
104 if (channel == null)
105 throw new NullPointerException("No channel on tunnel connect");
106
107 // Try to send pending messages if any (using current container thread).
108 if (!channel.runReceived(new AsyncHttpContext(request, response, amf3Request))) {
109
110 // No pending messages, wait for new ones or timeout.
111 setConnectMessage(request, amf3Request);
112 synchronized (channel) {
113 Continuation continuation = ContinuationSupport.getContinuation(request, channel);
114 channel.setContinuation(continuation);
115
116 // This call throws a RetryRequest exception, so we'll never reach return below...
117 continuation.suspend(getLongPollingTimeout());
118 }
119 }
120
121 return;
122 }
123
124 if (amf3Responses == null)
125 amf3Responses = new Message[amf3Requests.length];
126 amf3Responses[i] = amf3Response;
127 }
128
129 log.debug("<< [AMF3 RESPONSES] %s", (Object)amf3Responses);
130
131 serialize(gravity, response, amf3Responses);
132 }
133 catch (RetryRequest e) {
134 throw e;
135 }
136 catch (IOException e) {
137 log.error(e, "Gravity message error");
138 throw e;
139 }
140 catch (Exception e) {
141 log.error(e, "Gravity message error");
142 throw new ServletException(e);
143 }
144 finally {
145 // Cleanup context (thread local GraniteContext, etc.)
146 cleanupRequest(request);
147 }
148 }
149 }