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.jetty8;
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.eclipse.jetty.continuation.Continuation;
031 import org.eclipse.jetty.continuation.ContinuationSupport;
032 import org.eclipse.jetty.continuation.ContinuationThrowable;
033 import org.granite.gravity.AbstractGravityServlet;
034 import org.granite.gravity.AsyncHttpContext;
035 import org.granite.gravity.Gravity;
036 import org.granite.gravity.GravityManager;
037 import org.granite.gravity.GravityServletUtil;
038 import org.granite.logging.Logger;
039
040 import flex.messaging.messages.AsyncMessage;
041 import flex.messaging.messages.Message;
042
043 /**
044 * @author William DRAI
045 */
046 public class GravityJettyServlet extends AbstractGravityServlet {
047
048 private static final long serialVersionUID = 1L;
049
050 private static final Logger log = Logger.getLogger(GravityJettyServlet.class);
051
052
053 @Override
054 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
055
056 log.debug("doPost: from %s:%d", request.getRemoteAddr(), request.getRemotePort());
057
058 rejectJMFContentType(request);
059
060 Gravity gravity = GravityManager.getGravity(getServletContext());
061 ContinuationChannelFactory channelFactory = new ContinuationChannelFactory(gravity);
062
063 try {
064 // Setup context (thread local GraniteContext, etc.)
065 initializeRequest(gravity, request, response);
066
067 AsyncMessage connect = getConnectMessage(request);
068
069 // Resumed request (pending messages or timeout).
070 if (connect != null) {
071 String channelId = (String)connect.getClientId();
072 ContinuationChannel channel = gravity.getChannel(channelFactory, channelId);
073
074 // Reset channel continuation instance and deliver pending messages.
075 synchronized (channel) {
076 channel.close();
077 channel.runReceived(new AsyncHttpContext(request, response, connect));
078 }
079
080 return;
081 }
082
083 // New Request.
084 Message[] amf3Requests = deserialize(gravity, request);
085
086 log.debug(">> [AMF3 REQUESTS] %s", (Object)amf3Requests);
087
088 Message[] amf3Responses = null;
089
090 boolean accessed = false;
091 for (int i = 0; i < amf3Requests.length; i++) {
092 Message amf3Request = amf3Requests[i];
093
094 // Ask gravity to create a specific response (will be null with a connect request from tunnel).
095 Message amf3Response = gravity.handleMessage(channelFactory, amf3Request);
096 String channelId = (String)amf3Request.getClientId();
097
098 // Mark current channel (if any) as accessed.
099 if (!accessed)
100 accessed = gravity.access(channelId);
101
102 // (Re)Connect message from tunnel.
103 if (amf3Response == null) {
104 if (amf3Requests.length > 1)
105 throw new IllegalArgumentException("Only one request is allowed on tunnel.");
106
107 ContinuationChannel channel = gravity.getChannel(channelFactory, channelId);
108 if (channel == null)
109 throw new NullPointerException("No channel on tunnel connect");
110
111 // Try to send pending messages if any (using current container thread).
112 if (!channel.runReceived(new AsyncHttpContext(request, response, amf3Request))) {
113
114 // No pending messages, wait for new ones or timeout.
115 synchronized (channel) {
116 Continuation continuation = ContinuationSupport.getContinuation(request);
117 continuation.setTimeout(getLongPollingTimeout());
118 continuation.setAttribute(GravityServletUtil.CONNECT_MESSAGE_KEY, amf3Request);
119 channel.setContinuation(continuation);
120
121 // Suspend the current resquest/response processing and free the thread
122 continuation.suspend(response);
123 }
124 }
125
126 return;
127 }
128
129 if (amf3Responses == null)
130 amf3Responses = new Message[amf3Requests.length];
131 amf3Responses[i] = amf3Response;
132 }
133
134 log.debug("<< [AMF3 RESPONSES] %s", (Object)amf3Responses);
135
136 serialize(gravity, response, amf3Responses);
137 }
138 catch (ContinuationThrowable e) {
139 throw e;
140 }
141 catch (IOException e) {
142 log.error(e, "Gravity message error");
143 throw e;
144 }
145 catch (Exception e) {
146 log.error(e, "Gravity message error");
147 throw new ServletException(e);
148 }
149 finally {
150 // Cleanup context (thread local GraniteContext, etc.)
151 cleanupRequest(request);
152 }
153 }
154 }