git.gag.com Git - fw/altos/blob - altosdroid/src/org/altusmetrum/AltosDroid/TelemetryService.java

   1 /*
   2  * Copyright © 2012 Mike Beattie <mike@ethernal.org>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 package org.altusmetrum.AltosDroid;
  19
  20 import java.lang.ref.WeakReference;
  21 import java.util.ArrayList;
  22 import java.util.concurrent.TimeoutException;
  23 import java.util.Timer;
  24 import java.util.TimerTask;
  25
  26 import android.app.Notification;
  27 //import android.app.NotificationManager;
  28 import android.app.PendingIntent;
  29 import android.app.Service;
  30 import android.bluetooth.BluetoothDevice;
  31 import android.content.Intent;
  32 import android.content.Context;
  33 import android.os.Bundle;
  34 import android.os.IBinder;
  35 import android.os.Handler;
  36 import android.os.Message;
  37 import android.os.Messenger;
  38 import android.os.RemoteException;
  39 import android.os.Looper;
  40 import android.util.Log;
  41 import android.widget.Toast;
  42 import android.location.Location;
  43 import android.location.LocationManager;
  44 import android.location.LocationListener;
  45 import android.location.Criteria;
  46
  47 import org.altusmetrum.altoslib_3.*;
  48
  49
  50 public class TelemetryService extends Service implements LocationListener {
  51
  52         private static final String TAG = "TelemetryService";
  53         private static final boolean D = true;
  54
  55         static final int MSG_REGISTER_CLIENT   = 1;
  56         static final int MSG_UNREGISTER_CLIENT = 2;
  57         static final int MSG_CONNECT           = 3;
  58         static final int MSG_CONNECTED         = 4;
  59         static final int MSG_CONNECT_FAILED    = 5;
  60         static final int MSG_DISCONNECTED      = 6;
  61         static final int MSG_TELEMETRY         = 7;
  62         static final int MSG_SETFREQUENCY      = 8;
  63         static final int MSG_CRC_ERROR         = 9;
  64
  65         public static final int STATE_NONE       = 0;
  66         public static final int STATE_READY      = 1;
  67         public static final int STATE_CONNECTING = 2;
  68         public static final int STATE_CONNECTED  = 3;
  69
  70         // Unique Identification Number for the Notification.
  71         // We use it on Notification start, and to cancel it.
  72         private int NOTIFICATION = R.string.telemetry_service_label;
  73         //private NotificationManager mNM;
  74
  75         // Timer - we wake up every now and then to decide if the service should stop
  76         private Timer timer = new Timer();
  77
  78         ArrayList<Messenger> mClients = new ArrayList<Messenger>(); // Keeps track of all current registered clients.
  79         final Handler   mHandler   = new IncomingHandler(this);
  80         final Messenger mMessenger = new Messenger(mHandler); // Target we publish for clients to send messages to IncomingHandler.
  81
  82         // Name of the connected device
  83         private BluetoothDevice device           = null;
  84         private AltosBluetooth  mAltosBluetooth  = null;
  85         private AltosConfigData mConfigData      = null;
  86         private TelemetryReader mTelemetryReader = null;
  87         private TelemetryLogger mTelemetryLogger = null;
  88
  89         // internally track state of bluetooth connection
  90         private int state = STATE_NONE;
  91
  92         // Last data seen; send to UI when it starts
  93
  94         private AltosState last_state;
  95         private Location last_location;
  96         private int last_crc_errors;
  97
  98         // Handler of incoming messages from clients.
  99         static class IncomingHandler extends Handler {
 100                 private final WeakReference<TelemetryService> service;
 101                 IncomingHandler(TelemetryService s) { service = new WeakReference<TelemetryService>(s); }
 102
 103                 @Override
 104                 public void handleMessage(Message msg) {
 105                         TelemetryService s = service.get();
 106                         switch (msg.what) {
 107                         case MSG_REGISTER_CLIENT:
 108                                 s.mClients.add(msg.replyTo);
 109                                 try {
 110                                         // Now we try to send the freshly connected UI any relavant information about what
 111                                         // we're talking to - Basically state and Config Data.
 112                                         msg.replyTo.send(Message.obtain(null, AltosDroid.MSG_STATE_CHANGE, s.state, -1, s.mConfigData));
 113                                         // We also send any recent telemetry or location data that's cached
 114                                         if (s.last_state      != null) msg.replyTo.send(Message.obtain(null, AltosDroid.MSG_TELEMETRY, s.last_state     ));
 115                                         if (s.last_location   != null) msg.replyTo.send(Message.obtain(null, AltosDroid.MSG_LOCATION , s.last_location  ));
 116                                         if (s.last_crc_errors != 0   ) msg.replyTo.send(Message.obtain(null, AltosDroid.MSG_CRC_ERROR, s.last_crc_errors));
 117                                 } catch (RemoteException e) {
 118                                         s.mClients.remove(msg.replyTo);
 119                                 }
 120                                 if (D) Log.d(TAG, "Client bound to service");
 121                                 break;
 122                         case MSG_UNREGISTER_CLIENT:
 123                                 s.mClients.remove(msg.replyTo);
 124                                 if (D) Log.d(TAG, "Client unbound from service");
 125                                 break;
 126                         case MSG_CONNECT:
 127                                 if (D) Log.d(TAG, "Connect command received");
 128                                 s.device = (BluetoothDevice) msg.obj;
 129                                 s.startAltosBluetooth();
 130                                 break;
 131                         case MSG_CONNECTED:
 132                                 if (D) Log.d(TAG, "Connected to device");
 133                                 s.connected();
 134                                 break;
 135                         case MSG_CONNECT_FAILED:
 136                                 if (D) Log.d(TAG, "Connection failed... retrying");
 137                                 s.startAltosBluetooth();
 138                                 break;
 139                         case MSG_DISCONNECTED:
 140                                 // Only do the following if we haven't been shutdown elsewhere..
 141                                 if (s.device != null) {
 142                                         if (D) Log.d(TAG, "Disconnected from " + s.device.getName());
 143                                         s.stopAltosBluetooth();
 144                                 }
 145                                 break;
 146                         case MSG_TELEMETRY:
 147                                 // forward telemetry messages
 148                                 s.last_state = (AltosState) msg.obj;
 149                                 s.sendMessageToClients(Message.obtain(null, AltosDroid.MSG_TELEMETRY, msg.obj));
 150                                 break;
 151                         case MSG_CRC_ERROR:
 152                                 // forward crc error messages
 153                                 s.last_crc_errors = (Integer) msg.obj;
 154                                 s.sendMessageToClients(Message.obtain(null, AltosDroid.MSG_CRC_ERROR, msg.obj));
 155                                 break;
 156                         case MSG_SETFREQUENCY:
 157                                 if (s.state == STATE_CONNECTED) {
 158                                         try {
 159                                                 s.mAltosBluetooth.set_radio_frequency((Double) msg.obj);
 160                                         } catch (InterruptedException e) {
 161                                         } catch (TimeoutException e) {
 162                                         }
 163                                 }
 164                                 break;
 165                         default:
 166                                 super.handleMessage(msg);
 167                         }
 168                 }
 169         }
 170
 171         private void sendMessageToClients(Message m) {
 172                 for (int i=mClients.size()-1; i>=0; i--) {
 173                         try {
 174                                 mClients.get(i).send(m);
 175                         } catch (RemoteException e) {
 176                                 mClients.remove(i);
 177                         }
 178                 }
 179         }
 180
 181         private void stopAltosBluetooth() {
 182                 if (D) Log.d(TAG, "stopAltosBluetooth(): begin");
 183                 setState(STATE_READY);
 184                 if (mTelemetryReader != null) {
 185                         if (D) Log.d(TAG, "stopAltosBluetooth(): stopping TelemetryReader");
 186                         mTelemetryReader.interrupt();
 187                         try {
 188                                 mTelemetryReader.join();
 189                         } catch (InterruptedException e) {
 190                         }
 191                         mTelemetryReader = null;
 192                 }
 193                 if (mTelemetryLogger != null) {
 194                         if (D) Log.d(TAG, "stopAltosBluetooth(): stopping TelemetryLogger");
 195                         mTelemetryLogger.stop();
 196                         mTelemetryLogger = null;
 197                 }
 198                 if (mAltosBluetooth != null) {
 199                         if (D) Log.d(TAG, "stopAltosBluetooth(): stopping AltosBluetooth");
 200                         mAltosBluetooth.close();
 201                         mAltosBluetooth = null;
 202                 }
 203                 device = null;
 204                 mConfigData = null;
 205         }
 206
 207         private void startAltosBluetooth() {
 208                 if (device == null) {
 209                         return;
 210                 }
 211                 if (mAltosBluetooth == null) {
 212                         if (D) Log.d(TAG, String.format("startAltosBluetooth(): Connecting to %s (%s)", device.getName(), device.getAddress()));
 213                         mAltosBluetooth = new AltosBluetooth(device, mHandler);
 214                         setState(STATE_CONNECTING);
 215                 } else {
 216                         // This is a bit of a hack - if it appears we're still connected, we treat this as a restart.
 217                         // So, to give a suitable delay to teardown/bringup, we just schedule a resend of a message
 218                         // to ourselves in a few seconds time that will ultimately call this method again.
 219                         // ... then we tear down the existing connection.
 220                         // We do it this way around so that we don't lose a reference to the device when this method
 221                         // is called on reception of MSG_CONNECT_FAILED in the handler above.
 222                         mHandler.sendMessageDelayed(Message.obtain(null, MSG_CONNECT, device), 3000);
 223                         stopAltosBluetooth();
 224                 }
 225         }
 226
 227         private synchronized void setState(int s) {
 228                 if (D) Log.d(TAG, "setState(): " + state + " -> " + s);
 229                 state = s;
 230
 231                 // This shouldn't be required - mConfigData should be null for any non-connected
 232                 // state, but to be safe and to reduce message size
 233                 AltosConfigData acd = (state == STATE_CONNECTED) ? mConfigData : null;
 234
 235                 sendMessageToClients(Message.obtain(null, AltosDroid.MSG_STATE_CHANGE, state, -1, acd));
 236         }
 237
 238         private void connected() {
 239                 try {
 240                         if (mAltosBluetooth == null)
 241                                 throw new InterruptedException("no bluetooth");
 242                         mConfigData = mAltosBluetooth.config_data();
 243                 } catch (InterruptedException e) {
 244                 } catch (TimeoutException e) {
 245                         // If this timed out, then we really want to retry it, but
 246                         // probably safer to just retry the connection from scratch.
 247                         mHandler.obtainMessage(MSG_CONNECT_FAILED).sendToTarget();
 248                         return;
 249                 }
 250
 251                 setState(STATE_CONNECTED);
 252
 253                 mTelemetryReader = new TelemetryReader(mAltosBluetooth, mHandler);
 254                 mTelemetryReader.start();
 255
 256                 mTelemetryLogger = new TelemetryLogger(this, mAltosBluetooth);
 257         }
 258
 259
 260         private void onTimerTick() {
 261                 if (D) Log.d(TAG, "Timer wakeup");
 262                 try {
 263                         if (mClients.size() <= 0 && state != STATE_CONNECTED) {
 264                                 stopSelf();
 265                         }
 266                 } catch (Throwable t) {
 267                         Log.e(TAG, "Timer failed: ", t);
 268                 }
 269         }
 270
 271
 272         @Override
 273         public void onCreate() {
 274                 // Create a reference to the NotificationManager so that we can update our notifcation text later
 275                 //mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
 276
 277                 setState(STATE_READY);
 278
 279                 // Start our timer - first event in 10 seconds, then every 10 seconds after that.
 280                 timer.scheduleAtFixedRate(new TimerTask(){ public void run() {onTimerTick();}}, 10000L, 10000L);
 281
 282                 // Listen for GPS and Network position updates
 283                 LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
 284
 285                 locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 1, this);
 286 //              locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, this);
 287         }
 288
 289         @Override
 290         public int onStartCommand(Intent intent, int flags, int startId) {
 291                 Log.i("TelemetryService", "Received start id " + startId + ": " + intent);
 292
 293                 CharSequence text = getText(R.string.telemetry_service_started);
 294
 295                 // Create notification to be displayed while the service runs
 296                 Notification notification = new Notification(R.drawable.am_status_c, text, 0);
 297
 298                 // The PendingIntent to launch our activity if the user selects this notification
 299                 PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
 300                                 new Intent(this, AltosDroid.class), 0);
 301
 302                 // Set the info for the views that show in the notification panel.
 303                 notification.setLatestEventInfo(this, getText(R.string.telemetry_service_label), text, contentIntent);
 304
 305                 // Set the notification to be in the "Ongoing" section.
 306                 notification.flags |= Notification.FLAG_ONGOING_EVENT;
 307
 308                 // Move us into the foreground.
 309                 startForeground(NOTIFICATION, notification);
 310
 311                 // We want this service to continue running until it is explicitly
 312                 // stopped, so return sticky.
 313                 return START_STICKY;
 314         }
 315
 316         @Override
 317         public void onDestroy() {
 318
 319                 // Stop listening for location updates
 320                 ((LocationManager) getSystemService(Context.LOCATION_SERVICE)).removeUpdates(this);
 321
 322                 // Stop the bluetooth Comms threads
 323                 stopAltosBluetooth();
 324
 325                 // Demote us from the foreground, and cancel the persistent notification.
 326                 stopForeground(true);
 327
 328                 // Stop our timer
 329                 if (timer != null) {timer.cancel();}
 330
 331                 // Tell the user we stopped.
 332                 Toast.makeText(this, R.string.telemetry_service_stopped, Toast.LENGTH_SHORT).show();
 333         }
 334
 335         @Override
 336         public IBinder onBind(Intent intent) {
 337                 return mMessenger.getBinder();
 338         }
 339
 340
 341         public void onLocationChanged(Location location) {
 342                 last_location = location;
 343                 sendMessageToClients(Message.obtain(null, AltosDroid.MSG_LOCATION, location));
 344         }
 345
 346         public void onStatusChanged(String provider, int status, Bundle extras) {
 347         }
 348
 349         public void onProviderEnabled(String provider) {
 350         }
 351
 352         public void onProviderDisabled(String provider) {
 353         }
 354
 355 }