001 /*
002 GRANITE DATA SERVICES
003 Copyright (C) 2011 GRANITE DATA SERVICES S.A.S.
004
005 This file is part of Granite Data Services.
006
007 Granite Data Services is free software; you can redistribute it and/or modify
008 it under the terms of the GNU Library General Public License as published by
009 the Free Software Foundation; either version 2 of the License, or (at your
010 option) any later version.
011
012 Granite Data Services is distributed in the hope that it will be useful, but
013 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015 for more details.
016
017 You should have received a copy of the GNU Library General Public License
018 along with this library; if not, see <http://www.gnu.org/licenses/>.
019 */
020
021 package org.granite.gravity.weblogic;
022
023 import java.io.IOException;
024
025 import javax.servlet.ServletConfig;
026 import javax.servlet.ServletException;
027 import javax.servlet.http.HttpServletRequest;
028 import javax.servlet.http.HttpServletResponse;
029
030 import org.granite.gravity.AbstractGravityServlet;
031 import org.granite.gravity.AsyncHttpContext;
032 import org.granite.gravity.Gravity;
033 import org.granite.gravity.GravityManager;
034 import org.granite.gravity.GravityServletUtil;
035 import org.granite.logging.Logger;
036 import org.granite.util.ServletParams;
037
038 import weblogic.servlet.http.AbstractAsyncServlet;
039 import weblogic.servlet.http.RequestResponseKey;
040 import flex.messaging.messages.CommandMessage;
041 import flex.messaging.messages.Message;
042
043 /**
044 * @author Franck WOLFF
045 */
046 public class GravityWebLogicServlet extends AbstractAsyncServlet {
047
048 private static final long serialVersionUID = 1L;
049
050 private static final Logger log = Logger.getLogger(GravityWebLogicServlet.class);
051
052 private static final String SCAVANGE_INTERVAL = "scavangeInterval";
053
054 @Override
055 public void init(ServletConfig config) throws ServletException {
056 super.init(config);
057
058 GravityServletUtil.init(config, new WebLogicChannelFactory());
059
060 int scavangeInterval = ServletParams.get(
061 config,
062 SCAVANGE_INTERVAL,
063 Integer.TYPE,
064 AbstractAsyncServlet.DEFAULT_SCAVANGE_INTERVAL
065 );
066
067 log.info("Using scavange interval of: %s", scavangeInterval);
068 AbstractAsyncServlet.setScavangeInterval(scavangeInterval);
069 }
070
071 @Override
072 protected boolean doRequest(RequestResponseKey key) throws IOException, ServletException {
073 Gravity gravity = GravityManager.getGravity(getServletContext());
074
075 HttpServletRequest request = key.getRequest();
076 HttpServletResponse response = key.getResponse();
077
078 try {
079 GravityServletUtil.initializeRequest(getServletConfig(), gravity, request, response);
080
081 Message[] amf3Requests = GravityServletUtil.deserialize(gravity, request);
082
083 log.debug(">> [AMF3 REQUESTS] %s", (Object)amf3Requests);
084
085 Message[] amf3Responses = null;
086
087 boolean accessed = false;
088 for (int i = 0; i < amf3Requests.length; i++) {
089 Message amf3Request = amf3Requests[i];
090
091 // Ask gravity to create a specific response (will be null for connect request from tunnel).
092 Message amf3Response = gravity.handleMessage(amf3Request);
093 String channelId = (String)amf3Request.getClientId();
094
095 // Mark current channel (if any) as accessed.
096 if (!accessed)
097 accessed = gravity.access(channelId);
098
099 // (Re)Connect message from tunnel...
100 if (amf3Response == null) {
101 if (amf3Requests.length > 1)
102 throw new IllegalArgumentException("Only one connect request is allowed on tunnel.");
103
104 WebLogicChannel channel = (WebLogicChannel)gravity.getChannel(channelId);
105 if (channel == null)
106 throw new NullPointerException("No channel on tunnel connect");
107
108 // Try to send pending messages if any (using current container thread).
109 if (channel.runReceived(new AsyncHttpContext(request, response, amf3Request)))
110 return false;
111
112 // No pending messages, wait for new ones or timeout.
113 GravityServletUtil.setConnectMessage(request, amf3Request);
114 key.setTimeout((int)GravityServletUtil.getLongPollingTimeout(getServletContext()));
115 channel.setRequestResponseKey(key);
116 return true;
117 }
118
119 if (amf3Responses == null)
120 amf3Responses = new Message[amf3Requests.length];
121 amf3Responses[i] = amf3Response;
122 }
123
124 log.debug("<< [AMF3 RESPONSES] %s", (Object)amf3Responses);
125
126 GravityServletUtil.serialize(gravity, response, amf3Responses);
127 }
128 catch (IOException e) {
129 log.error(e, "Gravity message error");
130 throw e;
131 }
132 catch (Exception e) {
133 log.error(e, "Gravity message error");
134 throw new ServletException(e);
135 }
136 finally {
137 GravityServletUtil.cleanupRequest(request);
138 }
139 return false;
140 }
141
142 @Override
143 protected void doResponse(RequestResponseKey key, Object context) throws IOException, ServletException {
144 WebLogicChannel channel = (WebLogicChannel)context;
145 HttpServletRequest request = key.getRequest();
146 HttpServletResponse response = key.getResponse();
147 Message requestMessage = AbstractGravityServlet.getConnectMessage(request);
148
149 channel.runReceived(new AsyncHttpContext(request, response, requestMessage));
150 }
151
152 @Override
153 protected void doTimeout(RequestResponseKey key) throws IOException, ServletException {
154 Gravity gravity = GravityManager.getGravity(getServletContext());
155 CommandMessage amf3Request = GravityServletUtil.getConnectMessage(key.getRequest());
156 String channelId = (String)amf3Request.getClientId();
157 WebLogicChannel channel = (WebLogicChannel)gravity.getChannel(channelId);
158 channel.setRequestResponseKey(null);
159 }
160 }