Android Open Source - bitfynd-wallet-android Accept Bluetooth Service

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Copyright 2013-2014 the original author or authors.
 */*from  w  ww . j a v a2 s. c om*/
 * 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
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package de.schildbach.wallet.offline;

import org.bitcoinj.core.Transaction;
import org.bitcoinj.core.VerificationException;
import org.bitcoinj.core.Wallet;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import android.app.Service;
import android.bluetooth.BluetoothAdapter;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Handler;
import android.os.IBinder;
import android.os.PowerManager;
import android.os.PowerManager.WakeLock;
import android.text.format.DateUtils;

import de.schildbach.wallet.BuildConfig;
import de.schildbach.wallet.WalletApplication;

/**
 * @author Andreas Schildbach
 */
public final class AcceptBluetoothService extends Service
{
  private WalletApplication application;
  private Wallet wallet;
  private WakeLock wakeLock;
  private AcceptBluetoothThread classicThread;
  private AcceptBluetoothThread paymentProtocolThread;

  private long serviceCreatedAt;

  private final Handler handler = new Handler();

  private static final long TIMEOUT_MS = 5 * DateUtils.MINUTE_IN_MILLIS;

  private static final Logger log = LoggerFactory.getLogger(AcceptBluetoothService.class);

  @Override
  public IBinder onBind(final Intent intent)
  {
    return null;
  }

  @Override
  public int onStartCommand(final Intent intent, final int flags, final int startId)
  {
    handler.removeCallbacks(timeoutRunnable);
    handler.postDelayed(timeoutRunnable, TIMEOUT_MS);

    return START_NOT_STICKY;
  }

  @Override
  public void onCreate()
  {
    serviceCreatedAt = System.currentTimeMillis();
    log.debug(".onCreate()");

    super.onCreate();

    this.application = (WalletApplication) getApplication();
    this.wallet = application.getWallet();

    final BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

    final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
    wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, BuildConfig.APPLICATION_ID + " bluetooth transaction submission");
    wakeLock.acquire();

    registerReceiver(bluetoothStateChangeReceiver, new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED));

    classicThread = new AcceptBluetoothThread.ClassicBluetoothThread(bluetoothAdapter)
    {
      @Override
      public boolean handleTx(final Transaction tx)
      {
        return AcceptBluetoothService.this.handleTx(tx);
      }
    };
    classicThread.start();

    paymentProtocolThread = new AcceptBluetoothThread.PaymentProtocolThread(bluetoothAdapter)
    {
      @Override
      public boolean handleTx(final Transaction tx)
      {
        return AcceptBluetoothService.this.handleTx(tx);
      }
    };
    paymentProtocolThread.start();
  }

  private boolean handleTx(final Transaction tx)
  {
    log.info("tx " + tx.getHashAsString() + " arrived via blueooth");

    try
    {
      if (wallet.isTransactionRelevant(tx))
      {
        wallet.receivePending(tx, null);

        handler.post(new Runnable()
        {
          @Override
          public void run()
          {
            application.broadcastTransaction(tx);
          }
        });
      }
      else
      {
        log.info("tx " + tx.getHashAsString() + " irrelevant");
      }

      return true;
    }
    catch (final VerificationException x)
    {
      log.info("cannot verify tx " + tx.getHashAsString() + " received via bluetooth", x);
    }

    return false;
  }

  @Override
  public void onDestroy()
  {
    paymentProtocolThread.stopAccepting();
    classicThread.stopAccepting();

    unregisterReceiver(bluetoothStateChangeReceiver);

    wakeLock.release();

    handler.removeCallbacksAndMessages(null);

    super.onDestroy();

    log.info("service was up for " + ((System.currentTimeMillis() - serviceCreatedAt) / 1000 / 60) + " minutes");
  }

  private final BroadcastReceiver bluetoothStateChangeReceiver = new BroadcastReceiver()
  {
    @Override
    public void onReceive(final Context context, final Intent intent)
    {
      final int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, 0);

      if (state == BluetoothAdapter.STATE_TURNING_OFF || state == BluetoothAdapter.STATE_OFF)
      {
        log.info("bluetooth was turned off, stopping service");

        stopSelf();
      }
    }
  };

  private final Runnable timeoutRunnable = new Runnable()
  {
    @Override
    public void run()
    {
      log.info("timeout expired, stopping service");

      stopSelf();
    }
  };
}

Java Source Code List

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