com.notifier.desktop.transport.bluetooth.impl.BluetoothTransportImpl.java Source code

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Here is the source code for com.notifier.desktop.transport.bluetooth.impl.BluetoothTransportImpl.java

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/*
 * Android Notifier Desktop is a multiplatform remote notification client for Android devices.
 *
 * Copyright (C) 2010  Leandro Aparecido
 *
 * 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 version 3 of the License.
 *
 * 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 com.notifier.desktop.transport.bluetooth.impl;

import java.io.*;

import javax.bluetooth.*;
import javax.microedition.io.*;

import org.slf4j.*;

import com.google.common.base.*;
import com.google.common.io.*;
import com.google.inject.*;
import com.notifier.desktop.*;
import com.notifier.desktop.notification.*;
import com.notifier.desktop.notification.parsing.*;
import com.notifier.desktop.os.*;
import com.notifier.desktop.transport.bluetooth.*;

@Singleton
public class BluetoothTransportImpl extends RestartableService implements BluetoothTransport {

    private static final String NAME = "bluetooth";
    private static final String BASE_URL = "btspp://localhost:7674047e6e474bf0831f209e3f9dd23f;name=AndroidNotifierService;authenticate=true";
    private static final String URL_MAC = BASE_URL;
    private static final String URL_WINDOWS_LINUX = BASE_URL + ";encrypt=true";

    private static final Logger logger = LoggerFactory.getLogger(BluetoothTransportImpl.class);

    private @Inject Application application;
    private @Inject NotificationManager notificationManager;
    private @Inject NotificationParser<byte[]> notificationParser;

    private String address;
    private volatile boolean enabled;
    private Thread acceptorThread;

    @Override
    public String getName() {
        return NAME;
    }

    @Override
    public String getAddress() {
        return address;
    }

    @Override
    public void doStart() {
        LocalDevice localDevice = null;
        try {
            localDevice = LocalDevice.getLocalDevice();
            address = localDevice.getBluetoothAddress();
        } catch (BluetoothStateException e) {
            String message = Strings.nullToEmpty(e.getMessage());
            if ("BluetoothStack not detected".equals(message)) {
                throw new IllegalStateException("Bluetooth not detected, disabling it.", e);
            } else if (message.contains("libbluetooth.so")) {
                throw new IllegalStateException(
                        "You have to install the package libbluetooth-dev on Ubuntu or bluez-libs-devel on Fedora or bluez-devel on openSUSE to be able to receive bluetooth notifications.");
            } else {
                throw new RuntimeException(e);
            }
        }
        enabled = true;
        if (localDevice != null && acceptorThread == null) {
            acceptorThread = new Thread(new Runnable() {
                @Override
                public void run() {
                    StreamConnectionNotifier notifier = null;
                    try {
                        if (OperatingSystems.CURRENT_FAMILY == OperatingSystems.Family.MAC) {
                            notifier = (StreamConnectionNotifier) Connector.open(URL_MAC);
                        } else {
                            notifier = (StreamConnectionNotifier) Connector.open(URL_WINDOWS_LINUX);
                        }
                        while (!Thread.currentThread().isInterrupted()) {
                            StreamConnection connection = null;
                            InputStream inputStream = null;
                            try {
                                // acceptAndOpen() will never return without connection and it
                                // cannot be interrupted
                                connection = notifier.acceptAndOpen();
                                inputStream = connection.openInputStream();
                                byte[] data = ByteStreams.toByteArray(inputStream);
                                if (enabled) {
                                    Notification notification = notificationParser.parse(data);
                                    if (notification != null) {
                                        notificationManager.notificationReceived(notification);
                                    }
                                }
                            } catch (InterruptedIOException e) {
                                break;
                            } catch (Exception e) {
                                if (e instanceof InterruptedException) {
                                    break;
                                } else {
                                    logger.error("Error handling bluetooth notification", e);
                                    application.showError(Application.NAME + " Bluetooth Error",
                                            "An error ocurred while receiving bluetooth notification.");
                                }
                            } finally {
                                Closeables.closeQuietly(inputStream);
                                if (connection != null) {
                                    try {
                                        connection.close();
                                    } catch (Exception e) {
                                        logger.warn("Error closing bluetooth connection", e);
                                    }
                                }
                            }
                        }
                    } catch (Exception e) {
                        logger.error("Error setting up bluetooth", e);
                        application.showError("Error setting up Bluetooth",
                                "An error occurred while setting up bluetooth to receive connections.");
                    } finally {
                        if (notifier != null) {
                            try {
                                notifier.close();
                            } catch (Exception e) {
                                logger.warn("Error closing bluetooth", e);
                            }
                        }
                        acceptorThread = null; // Allows a new thread to be started if this one dies
                    }
                }
            }, NAME);
            acceptorThread.setDaemon(true);
            acceptorThread.start();
        }
    }

    @Override
    public void doStop() {
        enabled = false;
    }

}