/*
- * Copyright © 2012 Mike Beattie <mike@ethernal.org>
+ * Copyright © 2012 Mike Beattie <mike@ethernal.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
import java.lang.ref.WeakReference;
import java.util.ArrayList;
-import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.TimeoutException;
+import java.util.Timer;
+import java.util.TimerTask;
import android.app.Notification;
//import android.app.NotificationManager;
import android.app.Service;
import android.bluetooth.BluetoothDevice;
import android.content.Intent;
+//import android.os.Bundle;
import android.os.IBinder;
import android.os.Handler;
import android.os.Message;
import android.os.Messenger;
+import android.os.RemoteException;
import android.util.Log;
import android.widget.Toast;
-// Need the following import to get access to the app resources, since this
-// class is in a sub-package.
-//import org.altusmetrum.AltosDroid.R;
-
import org.altusmetrum.AltosLib.*;
public class TelemetryService extends Service {
static final int MSG_UNREGISTER_CLIENT = 2;
static final int MSG_CONNECT = 3;
static final int MSG_CONNECTED = 4;
+ static final int MSG_CONNECT_FAILED = 5;
+ static final int MSG_DISCONNECTED = 6;
+ static final int MSG_TELEMETRY = 7;
+ static final int MSG_SETFREQUENCY = 8;
public static final int STATE_NONE = 0;
public static final int STATE_READY = 1;
private int NOTIFICATION = R.string.telemetry_service_label;
//private NotificationManager mNM;
+ // Timer - we wake up every now and then to decide if the service should stop
+ private Timer timer = new Timer();
+
ArrayList<Messenger> mClients = new ArrayList<Messenger>(); // Keeps track of all current registered clients.
final Handler mHandler = new IncomingHandler(this);
final Messenger mMessenger = new Messenger(mHandler); // Target we publish for clients to send messages to IncomingHandler.
// Name of the connected device
- private String mConnectedDeviceName = null;
- private AltosBluetooth mAltosBluetooth = null;
+ private BluetoothDevice device = null;
+ private AltosBluetooth mAltosBluetooth = null;
+ private AltosConfigData mConfigData = null;
+ private TelemetryReader mTelemetryReader = null;
+
+ // internally track state of bluetooth connection
private int state = STATE_NONE;
- LinkedBlockingQueue<AltosLine> telem;
// Handler of incoming messages from clients.
static class IncomingHandler extends Handler {
switch (msg.what) {
case MSG_REGISTER_CLIENT:
s.mClients.add(msg.replyTo);
+ try {
+ // Now we try to send the freshly connected UI any relavant information about what
+ // we're talking to - Basically state and Config Data.
+ msg.replyTo.send(Message.obtain(null, AltosDroid.MSG_STATE_CHANGE, s.state, -1, s.mConfigData));
+ } catch (RemoteException e) {
+ s.mClients.remove(msg.replyTo);
+ }
if (D) Log.d(TAG, "Client bound to service");
break;
case MSG_UNREGISTER_CLIENT:
break;
case MSG_CONNECT:
if (D) Log.d(TAG, "Connect command received");
- s.startAltosBluetooth((BluetoothDevice) msg.obj);
+ s.device = (BluetoothDevice) msg.obj;
+ s.startAltosBluetooth();
break;
case MSG_CONNECTED:
if (D) Log.d(TAG, "Connected to device");
- s.setState(STATE_CONNECTED);
- s.mAltosBluetooth.add_monitor(s.telem);
+ s.connected();
+ break;
+ case MSG_CONNECT_FAILED:
+ if (D) Log.d(TAG, "Connection failed... retrying");
+ s.startAltosBluetooth();
+ break;
+ case MSG_DISCONNECTED:
+ // Only do the following if we haven't been shutdown elsewhere..
+ if (s.device != null) {
+ if (D) Log.d(TAG, "Disconnected from " + s.device.getName());
+ s.stopAltosBluetooth();
+ }
+ break;
+ case MSG_TELEMETRY:
+ s.sendMessageToClients(Message.obtain(null, AltosDroid.MSG_TELEMETRY, msg.obj));
+ break;
+ case MSG_SETFREQUENCY:
+ if (s.state == STATE_CONNECTED) {
+ try {
+ s.mAltosBluetooth.set_radio_frequency((Double) msg.obj);
+ } catch (InterruptedException e) {
+ } catch (TimeoutException e) {
+ }
+ }
break;
default:
super.handleMessage(msg);
}
private void stopAltosBluetooth() {
- if (D) Log.i(TAG, "Stopping BT");
+ if (D) Log.d(TAG, "stopAltosBluetooth(): begin");
setState(STATE_READY);
+ if (mTelemetryReader != null) {
+ if (D) Log.d(TAG, "stopAltosBluetooth(): stopping TelemetryReader");
+ mTelemetryReader.interrupt();
+ try {
+ mTelemetryReader.join();
+ } catch (InterruptedException e) {
+ }
+ mTelemetryReader = null;
+ }
if (mAltosBluetooth != null) {
- if (D) Log.i(TAG, "Closing AltosBluetooth");
+ if (D) Log.d(TAG, "stopAltosBluetooth(): stopping AltosBluetooth");
mAltosBluetooth.close();
mAltosBluetooth = null;
}
- telem.clear();
+ device = null;
+ mConfigData = null;
}
- private void startAltosBluetooth(BluetoothDevice d) {
- if (D) Log.i(TAG, "Connecting to " + d.getName());
- mAltosBluetooth = new AltosBluetooth(d, mHandler);
+ private void startAltosBluetooth() {
+ if (mAltosBluetooth == null) {
+ if (D) Log.d(TAG, String.format("startAltosBluetooth(): Connecting to %s (%s)", device.getName(), device.getAddress()));
+ mAltosBluetooth = new AltosBluetooth(device, mHandler);
setState(STATE_CONNECTING);
+ } else {
+ // This is a bit of a hack - if it appears we're still connected, we treat this as a restart.
+ // So, to give a suitable delay to teardown/bringup, we just schedule a resend of a message
+ // to ourselves in a few seconds time that will ultimately call this method again.
+ // ... then we tear down the existing connection.
+ // We do it this way around so that we don't lose a reference to the device when this method
+ // is called on reception of MSG_CONNECT_FAILED in the handler above.
+ mHandler.sendMessageDelayed(Message.obtain(null, MSG_CONNECT, device), 3000);
+ stopAltosBluetooth();
+ }
}
private synchronized void setState(int s) {
- if (D) Log.d(TAG, "setState() " + state + " -> " + s);
+ if (D) Log.d(TAG, "setState(): " + state + " -> " + s);
state = s;
- sendMessageToClients(Message.obtain(null, AltosDroid.MSG_STATE_CHANGE, state, -1));
+ // This shouldn't be required - mConfigData should be null for any non-connected
+ // state, but to be safe and to reduce message size
+ AltosConfigData acd = (state == STATE_CONNECTED) ? mConfigData : null;
+
+ sendMessageToClients(Message.obtain(null, AltosDroid.MSG_STATE_CHANGE, state, -1, acd));
+ }
+
+ private void connected() {
+ try {
+ mConfigData = mAltosBluetooth.config_data();
+ } catch (InterruptedException e) {
+ } catch (TimeoutException e) {
+ // If this timed out, then we really want to retry it, but
+ // probably safer to just retry the connection from scratch.
+ mHandler.obtainMessage(MSG_CONNECT_FAILED).sendToTarget();
+ return;
+ }
+
+ setState(STATE_CONNECTED);
+
+ mTelemetryReader = new TelemetryReader(mAltosBluetooth, mHandler);
+ mTelemetryReader.start();
}
+
+ private void onTimerTick() {
+ if (D) Log.d(TAG, "Timer wakeup");
+ try {
+ if (mClients.size() <= 0 && state != STATE_CONNECTED) {
+ stopSelf();
+ }
+ } catch (Throwable t) {
+ Log.e(TAG, "Timer failed: ", t);
+ }
+ }
+
+
@Override
public void onCreate() {
// Create a reference to the NotificationManager so that we can update our notifcation text later
//mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
- telem = new LinkedBlockingQueue<AltosLine>();
setState(STATE_READY);
+
+ // Start our timer - first event in 10 seconds, then every 10 seconds after that.
+ timer.scheduleAtFixedRate(new TimerTask(){ public void run() {onTimerTick();}}, 10000L, 10000L);
+
}
@Override
// Demote us from the foreground, and cancel the persistent notification.
stopForeground(true);
+ // Stop our timer
+ if (timer != null) {timer.cancel();}
+
// Tell the user we stopped.
Toast.makeText(this, R.string.telemetry_service_stopped, Toast.LENGTH_SHORT).show();
}
projects / fw / altos / blobdiff