Android Open Source - bitfynd-wallet-android Blockchain State Loader

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Copyright 2014 the original author or authors.
 *//  w  w w  .j  a va 2 s.co m
 * 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.service;

import java.util.concurrent.RejectedExecutionException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import android.content.AsyncTaskLoader;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.ServiceConnection;
import android.os.IBinder;
import android.support.v4.content.LocalBroadcastManager;

/**
 * @author Andreas Schildbach
 */
public class BlockchainStateLoader extends AsyncTaskLoader<BlockchainState>
{
  private final LocalBroadcastManager broadcastManager;
  private BlockchainService service;

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

  public BlockchainStateLoader(final Context context)
  {
    super(context);

    this.broadcastManager = LocalBroadcastManager.getInstance(context.getApplicationContext());
  }

  @Override
  protected void onStartLoading()
  {
    super.onStartLoading();

    broadcastManager.registerReceiver(broadcastReceiver, new IntentFilter(BlockchainService.ACTION_BLOCKCHAIN_STATE));

    final Context context = getContext();
    context.bindService(new Intent(context, BlockchainServiceImpl.class), serviceConnection, Context.BIND_AUTO_CREATE);
  }

  @Override
  protected void onStopLoading()
  {
    broadcastManager.unregisterReceiver(broadcastReceiver);

    super.onStopLoading();
  }

  @Override
  public BlockchainState loadInBackground()
  {
    final BlockchainState blockchainState = service.getBlockchainState();

    getContext().unbindService(serviceConnection);

    return blockchainState;
  }

  private final ServiceConnection serviceConnection = new ServiceConnection()
  {
    @Override
    public void onServiceConnected(final ComponentName name, final IBinder binder)
    {
      service = ((BlockchainServiceImpl.LocalBinder) binder).getService();

      forceLoad();
    }

    @Override
    public void onServiceDisconnected(final ComponentName name)
    {
      service = null;
    }
  };

  private final BroadcastReceiver broadcastReceiver = new BroadcastReceiver()
  {
    @Override
    public void onReceive(final Context context, final Intent broadcast)
    {
      try
      {
        deliverResult(BlockchainState.fromIntent(broadcast));
      }
      catch (final RejectedExecutionException x)
      {
        log.info("rejected execution: " + BlockchainStateLoader.this.toString());
      }
    }
  };
}

Java Source Code List

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