Example usage for java.nio.channels FileChannel close

List of usage examples for java.nio.channels FileChannel close

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Introduction

In this page you can find the example usage for java.nio.channels FileChannel close.

Prototype

public final void close() throws IOException

Source Link

Document

Closes this channel.

Usage

From source file:com.wabacus.util.FileLockTools.java

private static boolean release(FileChannel fc) {
    try {/*from   w  ww . java  2 s  .  c  o  m*/
        if (fc != null) {
            fc.close();
            fc = null;
        }
        return true;
    } catch (Exception e) {
        System.out.println("FileChannel");
        e.printStackTrace();
        return false;
    }
}

From source file:Main.java

public static boolean importDatabase(String dbName) {

    try {//from  ww w  .j  a v  a2 s.  c  om
        File sd = Environment.getExternalStorageDirectory();
        File data = Environment.getDataDirectory();

        if (sd.canWrite()) {
            String currentDBPath = "//data//" + PACKAGENAME + "//databases//" + dbName;
            String backupDBPath = "/AttendanceManager/" + dbName;
            File backupDB = new File(data, currentDBPath);
            File currentDB = new File(sd, backupDBPath);

            FileChannel src = new FileInputStream(currentDB).getChannel();
            FileChannel dst = new FileOutputStream(backupDB).getChannel();
            dst.transferFrom(src, 0, src.size());
            src.close();
            dst.close();
        }
    } catch (Exception e) {
        return false;
    }
    return true;
}

From source file:Main.java

public static void saveDBInSdcard(Context pContext, String pDatabaseName) {
    try {/*from  w w  w  . j ava 2 s .  co  m*/
        File sd = Environment.getExternalStorageDirectory();
        File data = Environment.getDataDirectory();

        if (sd.canWrite()) {
            String currentDBPath = "//data//" + pContext.getPackageName() + "//databases//" + pDatabaseName;
            String backupDBPath = pDatabaseName;
            File currentDB = new File(data, currentDBPath);
            File backupDB = new File(sd, backupDBPath);

            FileChannel src = new FileInputStream(currentDB).getChannel();
            FileChannel dst = new FileOutputStream(backupDB).getChannel();
            dst.transferFrom(src, 0, src.size());
            src.close();
            dst.close();
            Toast.makeText(pContext, backupDB.toString(), Toast.LENGTH_LONG).show();
        }
    } catch (Exception e) {
        Toast.makeText(pContext, e.toString(), Toast.LENGTH_LONG).show();
    }
}

From source file:Main.java

/**
 * Create a backup of the database./* w  w w.  jav a2s.  com*/
 *
 * @param context who calls the function.
 * @param dbName  Name of the database to backup. (If empty, radiomap.db is used).
 */
public static void exportDb(Context context, String dbName) {
    try {
        if (dbName.equals(""))
            dbName = "radiomap.db";

        File sd = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
        File data = Environment.getDataDirectory();

        if (sd.canWrite()) {
            String currentDBPath = "//data//" + context.getApplicationContext().getPackageName()
                    + "//databases//" + dbName;
            File currentDB = new File(data, currentDBPath);
            File backupDB = new File(sd, dbName);

            FileChannel src = new FileInputStream(currentDB).getChannel();
            FileChannel dst = new FileOutputStream(backupDB).getChannel();
            dst.transferFrom(src, 0, src.size());
            src.close();
            dst.close();

            Toast.makeText(context, "Datenbank nach Downloads exportiert!", Toast.LENGTH_LONG).show();
        }
    } catch (Exception e) {
        Log.e("Utils", e.getMessage());
        Toast.makeText(context, "Exportieren fehlgeschlagen!", Toast.LENGTH_LONG).show();
    }
}

From source file:Main.java

/**
 * Create a backup of the database./* w  ww. ja v  a 2  s .  c o  m*/
 *
 * @param context who calls the function.
 * @param dbName  Name of the database to backup. (If empty, radiomap.db is used).
 */
public static void importDb(Context context, String dbName) {
    try {
        if (dbName.equals(""))
            dbName = "radiomap.db";

        File sd = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
        File data = Environment.getDataDirectory();

        if (sd.canWrite()) {
            String currentDBPath = "//data//" + context.getApplicationContext().getPackageName()
                    + "//databases//" + dbName;
            File backupDB = new File(data, currentDBPath);
            File currentDB = new File(sd, dbName);

            FileChannel src = new FileInputStream(currentDB).getChannel();
            FileChannel dst = new FileOutputStream(backupDB).getChannel();
            dst.transferFrom(src, 0, src.size());
            src.close();
            dst.close();

            Toast.makeText(context, "Datenbank von Downloads importiert!", Toast.LENGTH_LONG).show();
        }
    } catch (Exception e) {
        Log.e("Utils", e.getMessage());
        Toast.makeText(context, "Import fehlgeschlagen!", Toast.LENGTH_LONG).show();
    }
}

From source file:Main.java

public static void toFile(ByteBuffer buffer, File file) throws IOException {
    RandomAccessFile raf = null;/*from w w w. j av a2  s  . c o m*/
    FileChannel channel = null;
    try {
        raf = new RandomAccessFile(file, "rw");
        channel = raf.getChannel();
        channel.write(buffer);
        channel.force(false /*metadata*/);
        channel.close();
        raf.close();
    } finally {
        if (channel != null) {
            try {
                channel.close();
            } catch (IOException e) {
                // Ignored.
            }
        }
        if (raf != null) {
            try {
                raf.close();
            } catch (IOException e) {
                // Ignored.
            }
        }
    }
}

From source file:Main.java

public static void copyFile(File src, File dst) throws IOException {
    FileInputStream in = new FileInputStream(src);
    FileOutputStream out = new FileOutputStream(dst);
    FileChannel inChannel = in.getChannel();
    FileChannel outChannel = out.getChannel();

    try {/*from   ww w .  j  a v a  2s.co  m*/
        inChannel.transferTo(0, inChannel.size(), outChannel);
    } finally {
        if (inChannel != null) {
            inChannel.close();
        }
        outChannel.close();
    }

    in.close();
    out.close();
}

From source file:Main.java

/** Copia un fichero.
 * @param source Fichero origen con el contenido que queremos copiar.
 * @param dest Fichero destino de los datos.
 * @throws IOException SI ocurre algun problema durante la copia */
public static void copyFile(final File source, final File dest) throws IOException {
    if (source == null || dest == null) {
        throw new IllegalArgumentException("Ni origen ni destino de la copia pueden ser nulos"); //$NON-NLS-1$
    }/*from  w  w w .  j av  a  2s .c  o m*/

    final FileInputStream is = new FileInputStream(source);
    final FileOutputStream os = new FileOutputStream(dest);
    final FileChannel in = is.getChannel();
    final FileChannel out = os.getChannel();
    final MappedByteBuffer buf = in.map(FileChannel.MapMode.READ_ONLY, 0, in.size());
    out.write(buf);

    in.close();
    out.close();
    is.close();
    os.close();

}

From source file:eu.mhutti1.utils.storage.StorageDeviceUtils.java

private static boolean canWrite(File file) {
    try {/*from w w  w  .j  a va 2 s  . c o m*/
        RandomAccessFile randomAccessFile = new RandomAccessFile(file + "/test.txt", "rw");
        FileChannel fileChannel = randomAccessFile.getChannel();
        FileLock fileLock = fileChannel.lock();
        fileLock.release();
        fileChannel.close();
        randomAccessFile.close();
        return true;
    } catch (Exception ex) {
        return false;
    }
}

From source file:com.alibaba.otter.shared.common.utils.NioUtilsPerformance.java

public static void sendFileTest(File source, File target) throws Exception {
    FileInputStream fis = null;/*from  w w  w  .j av a2 s . c o  m*/
    FileOutputStream fos = null;
    try {
        fis = new FileInputStream(source);
        fos = new FileOutputStream(target);
        FileChannel sChannel = fis.getChannel();
        FileChannel tChannel = fos.getChannel();
        target.createNewFile();
        sChannel.transferTo(0, source.length(), tChannel);
        tChannel.close();
        sChannel.close();
    } finally {
        IOUtils.closeQuietly(fis);
        IOUtils.closeQuietly(fos);
    }
}