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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.touchwand.internal;
  14
  15 import static org.openhab.binding.touchwand.internal.TouchWandBindingConstants.SUPPORTED_TOUCHWAND_TYPES;
  16
  17 import java.io.IOException;
  18 import java.net.URI;
  19 import java.net.URISyntaxException;
  20 import java.util.Arrays;
  21 import java.util.concurrent.CopyOnWriteArraySet;
  22 import java.util.concurrent.ScheduledExecutorService;
  23 import java.util.concurrent.ScheduledFuture;
  24 import java.util.concurrent.TimeUnit;
  25
  26 import org.eclipse.jdt.annotation.NonNullByDefault;
  27 import org.eclipse.jdt.annotation.Nullable;
  28 import org.eclipse.jetty.websocket.api.Session;
  29 import org.eclipse.jetty.websocket.api.annotations.OnWebSocketClose;
  30 import org.eclipse.jetty.websocket.api.annotations.OnWebSocketConnect;
  31 import org.eclipse.jetty.websocket.api.annotations.OnWebSocketError;
  32 import org.eclipse.jetty.websocket.api.annotations.OnWebSocketMessage;
  33 import org.eclipse.jetty.websocket.api.annotations.WebSocket;
  34 import org.eclipse.jetty.websocket.client.ClientUpgradeRequest;
  35 import org.eclipse.jetty.websocket.client.WebSocketClient;
  36 import org.openhab.binding.touchwand.internal.dto.TouchWandUnitData;
  37 import org.openhab.binding.touchwand.internal.dto.TouchWandUnitFromJson;
  38 import org.slf4j.Logger;
  39 import org.slf4j.LoggerFactory;
  40
  41 import com.google.gson.JsonObject;
  42 import com.google.gson.JsonParser;
  43 import com.google.gson.JsonSyntaxException;
  44
  45 /**
  46  * The {@link TouchWandWebSockets} class implements WebSockets API to TouchWand controller
  47  *
  48  * @author Roie Geron - Initial contribution
  49  */
  50 @NonNullByDefault
  51 public class TouchWandWebSockets {
  52
  53     private static final int CONNECT_TIMEOUT_SEC = 15;
  54     private static final int CONNECT_TIMEOUT_MS = CONNECT_TIMEOUT_SEC * 1000;
  55     private static final int WEBSOCKET_RECONNECT_INTERVAL_SEC = CONNECT_TIMEOUT_SEC * 2;
  56     private static final int WEBSOCKET_IDLE_TIMEOUT_MS = CONNECT_TIMEOUT_SEC * 10 * 1000;
  57     private final Logger logger = LoggerFactory.getLogger(TouchWandWebSockets.class);
  58     private static final String WS_ENDPOINT_TOUCHWAND = "/async";
  59
  60     private WebSocketClient client;
  61     private String controllerAddress;
  62     private int port;
  63     private TouchWandSocket touchWandSocket;
  64     private boolean isShutDown = false;
  65     private CopyOnWriteArraySet<TouchWandUnitStatusUpdateListener> listeners = new CopyOnWriteArraySet<>();
  66     private @Nullable ScheduledFuture<?> socketReconnect;
  67     private @Nullable URI uri;
  68
  69     private ScheduledExecutorService scheduler;
  70
  71     public TouchWandWebSockets(String ipAddress, int port, ScheduledExecutorService scheduler) {
  72         client = new WebSocketClient();
  73         touchWandSocket = new TouchWandSocket();
  74         this.controllerAddress = ipAddress;
  75         this.port = port;
  76         this.scheduler = scheduler;
  77         socketReconnect = null;
  78     }
  79
  80     public void connect() {
  81         try {
  82             uri = new URI("ws://" + controllerAddress + ":" + port + WS_ENDPOINT_TOUCHWAND);
  83         } catch (URISyntaxException e) {
  84             logger.warn("URI not valid {} message {}", uri, e.getMessage());
  85             return;
  86         }
  87
  88         client.setConnectTimeout(CONNECT_TIMEOUT_MS);
  89         ClientUpgradeRequest request = new ClientUpgradeRequest();
  90         request.setSubProtocols("relay_protocol");
  91
  92         try {
  93             client.start();
  94             client.connect(touchWandSocket, uri, request);
  95         } catch (Exception e) {
  96             logger.warn("Could not connect webSocket URI {} message {}", uri, e.getMessage());
  97             return;
  98         }
  99     }
 100
 101     public void dispose() {
 102         isShutDown = true;
 103         try {
 104             client.stop();
 105             ScheduledFuture<?> mySocketReconnect = socketReconnect;
 106             if (mySocketReconnect != null) {
 107                 mySocketReconnect.cancel(true);
 108             }
 109         } catch (Exception e) {
 110             logger.warn("Could not stop webSocketClient,  message {}", e.getMessage());
 111         }
 112     }
 113
 114     public void registerListener(TouchWandUnitStatusUpdateListener listener) {
 115         if (!listeners.contains(listener)) {
 116             logger.debug("Adding TouchWandWebSocket listener {}", listener);
 117             listeners.add(listener);
 118         }
 119     }
 120
 121     public void unregisterListener(TouchWandUnitStatusUpdateListener listener) {
 122         logger.debug("Removing TouchWandWebSocket listener {}", listener);
 123         listeners.remove(listener);
 124     }
 125
 126     @WebSocket(maxIdleTime = WEBSOCKET_IDLE_TIMEOUT_MS)
 127     public class TouchWandSocket {
 128
 129         @OnWebSocketClose
 130         public void onClose(int statusCode, String reason) {
 131             logger.debug("Connection closed: {} - {}", statusCode, reason);
 132             if (!isShutDown) {
 133                 logger.debug("weSocket Closed - reconnecting");
 134                 asyncWeb();
 135             }
 136         }
 137
 138         @OnWebSocketConnect
 139         public void onConnect(Session session) {
 140             logger.debug("TouchWandWebSockets connected to {}", session.getRemoteAddress().toString());
 141             try {
 142                 long timestamp = System.currentTimeMillis(); // need unique id
 143                 String controllerIdStr = String.format("{\"contId\": \"openhab%d\"}", timestamp);
 144                 session.getRemote().sendString(controllerIdStr);
 145             } catch (IOException e) {
 146                 logger.warn("sendString : {}", e.getMessage());
 147             }
 148         }
 149
 150         @OnWebSocketMessage
 151         public void onMessage(String msg) {
 152             TouchWandUnitData touchWandUnit;
 153             try {
 154                 JsonObject unitObj = JsonParser.parseString(msg).getAsJsonObject();
 155                 boolean eventUnitChanged = "UNIT_CHANGED".equals(unitObj.get("type").getAsString());
 156                 if (!eventUnitChanged) {
 157                     return;
 158                 }
 159                 touchWandUnit = TouchWandUnitFromJson.parseResponse(unitObj.get("unit").getAsJsonObject());
 160                 if (!"ALIVE".equals(touchWandUnit.getStatus())) {
 161                     logger.debug("UNIT_CHANGED unit status not ALIVE : {}", touchWandUnit.getStatus());
 162                 }
 163                 boolean supportedUnitType = Arrays.asList(SUPPORTED_TOUCHWAND_TYPES).contains(touchWandUnit.getType());
 164                 if (!supportedUnitType) {
 165                     logger.debug("UNIT_CHANGED for unsupported unit type {}", touchWandUnit.getType());
 166                     return;
 167                 }
 168                 logger.debug("UNIT_CHANGED: name {} id {} status {}", touchWandUnit.getName(), touchWandUnit.getId(),
 169                         touchWandUnit.getCurrStatus());
 170
 171                 for (TouchWandUnitStatusUpdateListener listener : listeners) {
 172                     listener.onDataReceived(touchWandUnit);
 173
 174                 }
 175             } catch (JsonSyntaxException e) {
 176                 logger.warn("jsonParser.parse {} ", e.getMessage());
 177             }
 178         }
 179
 180         @OnWebSocketError
 181         public void onError(Throwable cause) {
 182             logger.warn("WebSocket Error: {}", cause.getMessage());
 183             if (!isShutDown) {
 184                 logger.debug("WebSocket onError - reconnecting");
 185                 asyncWeb();
 186             }
 187         }
 188
 189         private void asyncWeb() {
 190             ScheduledFuture<?> mySocketReconnect = socketReconnect;
 191             if (mySocketReconnect == null || mySocketReconnect.isDone()) {
 192                 socketReconnect = scheduler.schedule(TouchWandWebSockets.this::connect,
 193                         WEBSOCKET_RECONNECT_INTERVAL_SEC, TimeUnit.SECONDS);
 194             }
 195         }
 196     }
 197 }