X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=altosdroid%2Fsrc%2Forg%2Faltusmetrum%2FAltosDroid%2FTelemetryService.java;h=393fd2f6f03609856bcb63195360f2e87c0f2387;hp=a4e85ad07294c1b2687d828da66e59ade1b6a17a;hb=4420d4a9fc011ed970af506ef771dfb81580b666;hpb=7aab6e6b6e361455a7515fe6db7b0e9a6e4c786c diff --git a/altosdroid/src/org/altusmetrum/AltosDroid/TelemetryService.java b/altosdroid/src/org/altusmetrum/AltosDroid/TelemetryService.java index a4e85ad0..393fd2f6 100644 --- a/altosdroid/src/org/altusmetrum/AltosDroid/TelemetryService.java +++ b/altosdroid/src/org/altusmetrum/AltosDroid/TelemetryService.java @@ -1,5 +1,5 @@ /* - * Copyright © 2012 Mike Beattie + * Copyright © 2012 Mike Beattie * * 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 @@ -17,47 +17,234 @@ package org.altusmetrum.AltosDroid; +import java.lang.ref.WeakReference; +import java.util.ArrayList; +import java.util.concurrent.TimeoutException; +import java.util.Timer; +import java.util.TimerTask; + import android.app.Notification; -import android.app.NotificationManager; +//import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; +import android.bluetooth.BluetoothDevice; import android.content.Intent; -import android.os.Binder; +//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 { + private static final String TAG = "TelemetryService"; + private static final boolean D = true; -public class TelemetryService extends Service { + static final int MSG_REGISTER_CLIENT = 1; + 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; + public static final int STATE_CONNECTING = 2; + public static final int STATE_CONNECTED = 3; - /** - * Class for clients to access. Because we know this service always - * runs in the same process as its clients, we don't need to deal with - * IPC. - */ - public class TelemetryBinder extends Binder { - TelemetryService getService() { - return TelemetryService.this; - } - } // Unique Identification Number for the Notification. // We use it on Notification start, and to cancel it. private int NOTIFICATION = R.string.telemetry_service_label; - private NotificationManager mNM; + //private NotificationManager mNM; + + // Timer - we wake up every now and then to decide if the service should stop + private Timer timer = new Timer(); + + ArrayList mClients = new ArrayList(); // 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 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; + + // Handler of incoming messages from clients. + static class IncomingHandler extends Handler { + private final WeakReference service; + IncomingHandler(TelemetryService s) { service = new WeakReference(s); } + + @Override + public void handleMessage(Message msg) { + TelemetryService s = service.get(); + 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: + s.mClients.remove(msg.replyTo); + if (D) Log.d(TAG, "Client unbound from service"); + break; + case MSG_CONNECT: + if (D) Log.d(TAG, "Connect command received"); + s.device = (BluetoothDevice) msg.obj; + s.startAltosBluetooth(); + break; + case MSG_CONNECTED: + if (D) Log.d(TAG, "Connected to device"); + 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 sendMessageToClients(Message m) { + for (int i=mClients.size()-1; i>=0; i--) { + try { + mClients.get(i).send(m); + } catch (RemoteException e) { + mClients.remove(i); + } + } + } + + private void stopAltosBluetooth() { + 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.d(TAG, "stopAltosBluetooth(): stopping AltosBluetooth"); + mAltosBluetooth.close(); + mAltosBluetooth = null; + } + device = null; + mConfigData = null; + } + + 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); + state = s; + + // 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() { + public void onCreate() { // Create a reference to the NotificationManager so that we can update our notifcation text later - mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE); + //mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE); + + 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 - public int onStartCommand(Intent intent, int flags, int startId) { + public int onStartCommand(Intent intent, int flags, int startId) { Log.i("TelemetryService", "Received start id " + startId + ": " + intent); CharSequence text = getText(R.string.telemetry_service_started); @@ -67,7 +254,7 @@ public class TelemetryService extends Service { // The PendingIntent to launch our activity if the user selects this notification PendingIntent contentIntent = PendingIntent.getActivity(this, 0, - new Intent(this, TelemetryServiceActivities.Controller.class), 0); + new Intent(this, AltosDroid.class), 0); // Set the info for the views that show in the notification panel. notification.setLatestEventInfo(this, getText(R.string.telemetry_service_label), text, contentIntent); @@ -84,23 +271,25 @@ public class TelemetryService extends Service { } @Override - public void onDestroy() { + public void onDestroy() { + // Stop the bluetooth Comms threads + stopAltosBluetooth(); // 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(); } @Override - public IBinder onBind(Intent intent) { - return mBinder; + public IBinder onBind(Intent intent) { + return mMessenger.getBinder(); } - // This is the object that receives interactions from clients. See - // RemoteService for a more complete example. - private final IBinder mBinder = new TelemetryBinder(); }