Example usage for java.nio.channels FileChannel size

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

  1. HOME
  2. Java
  3. java
  4. java.nio.channels.*
  5. FileChannel
  6. size

Introduction

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

Prototype

public abstract long size() throws IOException;

Source Link

Document

Returns the current size of this channel's file.

Usage

From source file:com.jerrellmardis.amphitheatre.util.Utils.java

public static void backupDatabase(Context ctx) {
    try {// ww  w.j a v a  2s .  c om
        File sd = Environment.getExternalStorageDirectory();
        File data = Environment.getDataDirectory();

        if (sd.canWrite()) {
            String currentDBPath = "//data//" + ctx.getApplicationContext().getPackageName()
                    + "//databases//amphitheatre.db";
            String backupDBPath = "amphitheatre.db";
            File currentDB = new File(data, currentDBPath);
            File backupDB = new File(sd, backupDBPath);

            if (currentDB.exists()) {
                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) {
        Log.i(Utils.class.getSimpleName(), "Unable to backup database");
    }
}

From source file:com.todotxt.todotxttouch.util.Util.java

public static void copyFile(File origFile, File newFile, boolean overwrite) {
    if (!origFile.exists()) {
        Log.e(TAG, "Error renaming file: " + origFile + " does not exist");

        throw new TodoException("Error copying file: " + origFile + " does not exist");
    }/* w w w.j a va 2s . c  o m*/

    createParentDirectory(newFile);

    if (!overwrite && newFile.exists()) {
        Log.e(TAG, "Error copying file: destination exists: " + newFile);

        throw new TodoException("Error copying file: destination exists: " + newFile);
    }

    try {
        FileInputStream fis = new FileInputStream(origFile);
        FileOutputStream fos = new FileOutputStream(newFile);
        FileChannel in = fis.getChannel();
        fos.getChannel().transferFrom(in, 0, in.size());
        fis.close();
        fos.close();
    } catch (Exception e) {
        Log.e(TAG, "Error copying " + origFile + " to " + newFile);

        throw new TodoException("Error copying " + origFile + " to " + newFile, e);
    }
}

From source file:org.nuclos.common2.IOUtils.java

/**
 * @param fileIn/*from   ww w . j a v a  2 s  .c o m*/
 * @param fileOut
 * @throws IOException
 */
public static void copyFile(File fileIn, File fileOut) throws IOException {
    FileChannel sourceChannel = null;
    FileChannel destinationChannel = null;
    try {
        sourceChannel = new FileInputStream(fileIn).getChannel();
        destinationChannel = new FileOutputStream(fileOut).getChannel();
        sourceChannel.transferTo(0, sourceChannel.size(), destinationChannel);
    } finally {
        try {
            if (sourceChannel != null) {
                sourceChannel.close();
            }
        } finally {
            if (destinationChannel != null) {
                destinationChannel.close();
            }
        }
    }
}

From source file:gridool.util.xfer.TransferUtils.java

public static void sendfile(@Nonnull final File file, final long fromPos, final long count,
        @Nullable final String writeDirPath, @Nonnull final InetAddress dstAddr, final int dstPort,
        final boolean append, final boolean sync, @Nonnull final TransferClientHandler handler)
        throws IOException {
    if (!file.exists()) {
        throw new IllegalArgumentException(file.getAbsolutePath() + " does not exist");
    }/* w  w w  . j ava 2 s. co  m*/
    if (!file.isFile()) {
        throw new IllegalArgumentException(file.getAbsolutePath() + " is not file");
    }
    if (!file.canRead()) {
        throw new IllegalArgumentException(file.getAbsolutePath() + " cannot read");
    }

    final SocketAddress dstSockAddr = new InetSocketAddress(dstAddr, dstPort);
    SocketChannel channel = null;
    Socket socket = null;
    final OutputStream out;
    try {
        channel = SocketChannel.open();
        socket = channel.socket();
        socket.connect(dstSockAddr);
        out = socket.getOutputStream();
    } catch (IOException e) {
        LOG.error("failed to connect: " + dstSockAddr, e);
        IOUtils.closeQuietly(channel);
        NetUtils.closeQuietly(socket);
        throw e;
    }

    DataInputStream din = null;
    if (sync) {
        InputStream in = socket.getInputStream();
        din = new DataInputStream(in);
    }
    final DataOutputStream dos = new DataOutputStream(out);
    final StopWatch sw = new StopWatch();
    FileInputStream src = null;
    final long nbytes;
    try {
        src = new FileInputStream(file);
        FileChannel fc = src.getChannel();

        String fileName = file.getName();
        IOUtils.writeString(fileName, dos);
        IOUtils.writeString(writeDirPath, dos);
        long xferBytes = (count == -1L) ? fc.size() : count;
        dos.writeLong(xferBytes);
        dos.writeBoolean(append); // append=false
        dos.writeBoolean(sync);
        if (handler == null) {
            dos.writeBoolean(false);
        } else {
            dos.writeBoolean(true);
            handler.writeAdditionalHeader(dos);
        }

        // send file using zero-copy send
        nbytes = fc.transferTo(fromPos, xferBytes, channel);
        if (LOG.isDebugEnabled()) {
            LOG.debug("Sent a file '" + file.getAbsolutePath() + "' of " + nbytes + " bytes to "
                    + dstSockAddr.toString() + " in " + sw.toString());
        }

        if (sync) {// receive ack in sync mode
            long remoteRecieved = din.readLong();
            if (remoteRecieved != xferBytes) {
                throw new IllegalStateException(
                        "Sent " + xferBytes + " bytes, but remote node received " + remoteRecieved + " bytes");
            }
        }

    } catch (FileNotFoundException e) {
        LOG.error(PrintUtils.prettyPrintStackTrace(e, -1));
        throw e;
    } catch (IOException e) {
        LOG.error(PrintUtils.prettyPrintStackTrace(e, -1));
        throw e;
    } finally {
        IOUtils.closeQuietly(src);
        IOUtils.closeQuietly(din, dos);
        IOUtils.closeQuietly(channel);
        NetUtils.closeQuietly(socket);
    }
}

From source file:Main.java

public static void copyFiles(String sourcePath, String targetPath) throws IOException {
    File srcDir = new File(sourcePath);
    File[] files = srcDir.listFiles();
    FileChannel in = null;
    FileChannel out = null;//from  w ww .  j  ava  2 s.  c om
    for (File file : files) {
        try {
            in = new FileInputStream(file).getChannel();
            File outDir = new File(targetPath);
            if (!outDir.exists()) {
                outDir.mkdirs();
            }
            File outFile = new File(targetPath + File.separator + file.getName());
            out = new FileOutputStream(outFile).getChannel();
            in.transferTo(0, in.size(), out);
        } finally {
            if (in != null)
                in.close();
            if (out != null)
                out.close();
        }
    }
}

From source file:com.nridge.core.base.std.FilUtl.java

/**
 * Copies an input file to the output file.  In an effort to promote
 * better performance, I/O channels are used for the operations.
 *
 * @param anInFile Represents the source file.
 * @param anOutFile Represents the destination file.
 * @throws IOException Related to stream building and read/write operations.
 *//*ww w .  j  a  v a  2s  .  c  o  m*/
static public void copy(File anInFile, File anOutFile) throws IOException

{
    FileChannel srcChannel, dstChannel;

    srcChannel = new FileInputStream(anInFile).getChannel();
    dstChannel = new FileOutputStream(anOutFile).getChannel();

    srcChannel.transferTo(0, srcChannel.size(), dstChannel);
    srcChannel.close();
    dstChannel.close();
}

From source file:org.apache.hadoop.dfs.TestDatanodeBlockScanner.java

public static boolean corruptReplica(String blockName, int replica) throws IOException {
    Random random = new Random();
    File baseDir = new File(System.getProperty("test.build.data"), "dfs/data");
    boolean corrupted = false;
    for (int i = replica * 2; i < replica * 2 + 2; i++) {
        File blockFile = new File(baseDir, "data" + (i + 1) + "/current/" + blockName);
        if (blockFile.exists()) {
            // Corrupt replica by writing random bytes into replica
            RandomAccessFile raFile = new RandomAccessFile(blockFile, "rw");
            FileChannel channel = raFile.getChannel();
            String badString = "BADBAD";
            int rand = random.nextInt((int) channel.size() / 2);
            raFile.seek(rand);//from   w w  w .j  a  va  2  s. co  m
            raFile.write(badString.getBytes());
            raFile.close();
            corrupted = true;
        }
    }
    return corrupted;
}

From source file:de.wikilab.android.friendica01.Max.java

public static String readFile(String path) throws IOException {
    FileInputStream stream = new FileInputStream(new File(path));
    try {//  ww  w  .  j a  v  a 2  s . c  o m
        FileChannel fc = stream.getChannel();
        MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
        /* Instead of using default, pass in a decoder. */
        return Charset.defaultCharset().decode(bb).toString();
    } finally {
        stream.close();
    }
}

From source file:org.apache.pig.pigunit.PigTest.java

private static String readFile(File file) throws IOException {
    FileInputStream stream = new FileInputStream(file);
    try {// w w w  .  j  a  v  a 2s  .com
        FileChannel fc = stream.getChannel();
        MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
        return Charset.defaultCharset().decode(bb).toString();
    } finally {
        stream.close();
    }
}

From source file:com.becapps.easydownloader.utils.Utils.java

@SuppressWarnings("resource")
public static void copyFile(File src, File dst) throws IOException {
    FileChannel inChannel = new FileInputStream(src).getChannel();
    FileChannel outChannel = new FileOutputStream(dst).getChannel();
    //if (!dst.exists()) {
    try {//from   w ww. j a  va2  s.c om
        inChannel.transferTo(0, inChannel.size(), outChannel);
    } finally {
        if (inChannel != null)
            inChannel.close();
        if (outChannel != null)
            outChannel.close();
    }
    /*} else {
       logger("w", "copyFile: destination already exists", DEBUG_TAG);
    }*/
}