Java tutorial
/** Licensing and distribution ArModule is licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. ALVAR 2.0.0 - A Library for Virtual and Augmented Reality Copyright 2007-2012 VTT Technical Research Centre of Finland Licensed under the GNU Lesser General Public License Irrlicht Engine, the zlib and libpng. The Irrlicht Engine is based in part on the work of the Independent JPEG Group The module utilizes IJG code when the Irrlicht engine is compiled with support for JPEG images. */ /** @author Markus Ylikerl */ //Created 2014-12-01 package fi.vtt.nubomedia.armodule; import java.io.IOException; import java.util.concurrent.ConcurrentHashMap; import org.kurento.client.internal.NotEnoughResourcesException; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.web.socket.CloseStatus; import org.springframework.web.socket.TextMessage; import org.springframework.web.socket.WebSocketSession; import org.springframework.web.socket.handler.TextWebSocketHandler; import com.google.gson.GsonBuilder; import com.google.gson.JsonObject; import com.google.gson.Gson; import java.io.PrintWriter; import org.kurento.client.EndpointStats; import org.kurento.client.Stats; import java.util.Map; /** * base handler * * @author Markus Ylikerala */ public abstract class BaseHandler extends TextWebSocketHandler implements ModuleHandler { private final Logger log = LoggerFactory.getLogger(BaseHandler.class); protected final ConcurrentHashMap<String, UserSession> users = new ConcurrentHashMap<String, UserSession>(); private static final Gson gson = new GsonBuilder().create(); private PrintWriter out; @Override public void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception { log.debug("ME HadleTextMsg"); JsonObject jsonMessage = gson.fromJson(message.getPayload(), JsonObject.class); log.debug("Incoming message: {}", jsonMessage); switch (jsonMessage.get("id").getAsString()) { case "get_stats": getStats(session); break; case "start": start(session, jsonMessage); break; case "stop": release(session); break; case "onIceCandidate": onIceCandidate(session, jsonMessage); break; default: error(session, "Invalid message with id " + jsonMessage.get("id").getAsString()); break; } } private void start(final WebSocketSession session, JsonObject jsonMessage) { try { UserSession user = new UserSession(session.getId(), this); users.put(session.getId(), user); try { out = new PrintWriter("smart.txt"); } catch (Throwable t) { t.printStackTrace(); } String sdpOffer = jsonMessage.get("sdpOffer").getAsString(); String sdpAnswer = user.startSession(session, sdpOffer, jsonMessage); JsonObject response = new JsonObject(); response.addProperty("id", "startResponse"); response.addProperty("sdpAnswer", sdpAnswer); sendMessage(session, new TextMessage(response.toString())); } catch (Throwable t) { t.printStackTrace(); error(session, t.getMessage()); } } private void onIceCandidate(WebSocketSession session, JsonObject jsonMessage) { JsonObject jsonCandidate = jsonMessage.get("candidate").getAsJsonObject(); UserSession user = users.get(session.getId()); System.err.println("ME onIce: " + user); if (user != null) { user.addCandidate(jsonCandidate); } } private void notEnoughResources(WebSocketSession session) { // Send notEnoughResources message to client JsonObject response = new JsonObject(); response.addProperty("id", "notEnoughResources"); sendMessage(session, new TextMessage(response.toString())); // Release media session release(session); } protected void error(WebSocketSession session, String message) { try { JsonObject response = new JsonObject(); response.addProperty("id", "error"); response.addProperty("message", message); sendMessage(session, new TextMessage(response.toString())); release(session); } catch (Exception e) { log.error("Exception sending message", e); } } private void release(WebSocketSession session) { UserSession user = users.remove(session.getId()); if (user != null) { user.release(); } } public void sendMessage(WebSocketSession session, TextMessage message) { try { log.info("Sending message {} in session {}", message.getPayload(), session.getId()); synchronized (session) { session.sendMessage(message); } } catch (IOException e) { log.error("Exception sending message", e); } } @Override public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception { log.info("Closed websocket connection of session {}", session.getId()); release(session); } protected void smart(String msg, double time, String id) { try { out.println(msg + (int) time + "\t" + id); out.flush(); System.err.println(msg + "#" + time + "\t" + id); } catch (Throwable t) { t.printStackTrace(); } } private void getStats(WebSocketSession session) { try { UserSession user = users.get(session.getId()); if (user == null) { return; } Map<String, Stats> wr_stats = user.getWebRtcEndpoint().getStats(); //System.err.println("GET STATS..." + user.getWebRtcEndpoint().getStats()); System.err.println("GET STATS..." + wr_stats); for (Stats s : wr_stats.values()) { //for (Stats s : user.getWebRtcEndpoint().getStats().values()) { //System.err.println("STATS:" + s); switch (s.getType()) { case endpoint: //System.err.println("STATS endpoint"); EndpointStats end_stats = (EndpointStats) s; double e2eVideLatency = end_stats.getVideoE2ELatency() / 1000000; smart("***SMART E2E\t", e2eVideLatency, session.getId()); JsonObject response = new JsonObject(); response.addProperty("id", "videoE2Elatency"); response.addProperty("message", e2eVideLatency); sendMessage(session, new TextMessage(response.toString())); break; //case inboundrtp:{ //RTCInboundRTPStreamStats stats = (RTCInboundRTPStreamStats)s; //System.err.println(stats.getJitter()); //} //break; //case outboundrtp:{ //RTCOutboundRTPStreamStats stats = (RTCOutboundRTPStreamStats)s; // System.err.println(stats.getRoundTripTime()); // JsonObject response = new JsonObject(); // response.addProperty("id", "videoE2Elatency"); // response.addProperty("message", stats.getRoundTripTime()); // synchronized (session) { // session.sendMessage(new TextMessage(response.toString())); // } //} //break; default: //System.err.println("STATS DEFAULTS: " + s.getType() + "#" + s.getClass()); break; } } } catch (Throwable e) { log.error("Exception stats", e); } } }