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:edu.ucsb.eucalyptus.storage.fs.FileSystemStorageManager.java

public void copyObject(String sourceBucket, String sourceObject, String destinationBucket,
        String destinationObject) throws IOException {
    File oldObjectFile = new File(
            rootDirectory + FILE_SEPARATOR + sourceBucket + FILE_SEPARATOR + sourceObject);
    File newObjectFile = new File(
            rootDirectory + FILE_SEPARATOR + destinationBucket + FILE_SEPARATOR + destinationObject);
    if (!oldObjectFile.equals(newObjectFile)) {
        FileInputStream fileInputStream = null;
        FileChannel fileIn = null;
        FileOutputStream fileOutputStream = null;
        FileChannel fileOut = null;
        try {//from   www  .  j av  a  2s  . c  o  m
            fileInputStream = new FileInputStream(oldObjectFile);
            fileIn = fileInputStream.getChannel();
            fileOutputStream = new FileOutputStream(newObjectFile);
            fileOut = fileOutputStream.getChannel();
            fileIn.transferTo(0, fileIn.size(), fileOut);
        } finally {
            if (fileIn != null)
                fileIn.close();
            if (fileInputStream != null)
                fileInputStream.close();
            if (fileOut != null)
                fileOut.close();
            if (fileOutputStream != null)
                fileOutputStream.close();
        }
    }
}

From source file:com.hipu.bdb.util.FileUtils.java

/**
  * Copy up to extent bytes of the source file to the destination
  */*from  www  .j a va  2s . co  m*/
  * @param src
  * @param dest
  * @param extent Maximum number of bytes to copy
 * @param overwrite If target file already exits, and this parameter is
  * true, overwrite target file (We do this by first deleting the target
  * file before we begin the copy).
 * @return True if the extent was greater than actual bytes copied.
  * @throws FileNotFoundException
  * @throws IOException
  */
public static boolean copyFile(final File src, final File dest, long extent, final boolean overwrite)
        throws FileNotFoundException, IOException {
    boolean result = false;
    if (LOGGER.isLoggable(Level.FINE)) {
        LOGGER.fine("Copying file " + src + " to " + dest + " extent " + extent + " exists " + dest.exists());
    }
    if (dest.exists()) {
        if (overwrite) {
            dest.delete();
            LOGGER.finer(dest.getAbsolutePath() + " removed before copy.");
        } else {
            // Already in place and we're not to overwrite.  Return.
            return result;
        }
    }
    FileInputStream fis = null;
    FileOutputStream fos = null;
    FileChannel fcin = null;
    FileChannel fcout = null;
    try {
        // Get channels
        fis = new FileInputStream(src);
        fos = new FileOutputStream(dest);
        fcin = fis.getChannel();
        fcout = fos.getChannel();
        if (extent < 0) {
            extent = fcin.size();
        }

        // Do the file copy
        long trans = fcin.transferTo(0, extent, fcout);
        if (trans < extent) {
            result = false;
        }
        result = true;
    } catch (IOException e) {
        // Add more info to the exception. Preserve old stacktrace.
        // We get 'Invalid argument' on some file copies. See
        // http://intellij.net/forums/thread.jsp?forum=13&thread=63027&message=853123
        // for related issue.
        String message = "Copying " + src.getAbsolutePath() + " to " + dest.getAbsolutePath() + " with extent "
                + extent + " got IOE: " + e.getMessage();
        if ((e instanceof ClosedByInterruptException)
                || ((e.getMessage() != null) && e.getMessage().equals("Invalid argument"))) {
            LOGGER.severe("Failed copy, trying workaround: " + message);
            workaroundCopyFile(src, dest);
        } else {
            IOException newE = new IOException(message);
            newE.initCause(e);
            throw newE;
        }
    } finally {
        // finish up
        if (fcin != null) {
            fcin.close();
        }
        if (fcout != null) {
            fcout.close();
        }
        if (fis != null) {
            fis.close();
        }
        if (fos != null) {
            fos.close();
        }
    }
    return result;
}

From source file:com.owncloud.android.oc_framework.network.webdav.FileRequestEntity.java

@Override
public void writeRequest(final OutputStream out) throws IOException {
    //byte[] tmp = new byte[4096];
    ByteBuffer tmp = ByteBuffer.allocate(4096);
    int readResult = 0;

    // TODO(bprzybylski): each mem allocation can throw OutOfMemoryError we need to handle it
    //                    globally in some fashionable manner
    RandomAccessFile raf = new RandomAccessFile(mFile, "r");
    FileChannel channel = raf.getChannel();
    Iterator<OnDatatransferProgressListener> it = null;
    long transferred = 0;
    long size = mFile.length();
    if (size == 0)
        size = -1;//w  ww .j  a va  2  s.  c o m
    try {
        while ((readResult = channel.read(tmp)) >= 0) {
            out.write(tmp.array(), 0, readResult);
            tmp.clear();
            transferred += readResult;
            synchronized (mDataTransferListeners) {
                it = mDataTransferListeners.iterator();
                while (it.hasNext()) {
                    it.next().onTransferProgress(readResult, transferred, size, mFile.getName());
                }
            }
        }

    } catch (IOException io) {
        Log.e("FileRequestException", io.getMessage());
        throw new RuntimeException(
                "Ugly solution to workaround the default policy of retries when the server falls while uploading ; temporal fix; really",
                io);

    } finally {
        channel.close();
        raf.close();
    }
}

From source file:eu.alefzero.webdav.FileRequestEntity.java

@Override
public void writeRequest(final OutputStream out) throws IOException {
    //byte[] tmp = new byte[4096];
    ByteBuffer tmp = ByteBuffer.allocate(4096);
    int readResult = 0;

    // TODO(bprzybylski): each mem allocation can throw OutOfMemoryError we need to handle it
    //                    globally in some fashionable manner
    RandomAccessFile raf = new RandomAccessFile(mFile, "r");
    FileChannel channel = raf.getChannel();
    Iterator<OnDatatransferProgressListener> it = null;
    long transferred = 0;
    long size = mFile.length();
    if (size == 0)
        size = -1;/*from   w w w.  j a  v a 2s .  c om*/
    try {
        while ((readResult = channel.read(tmp)) >= 0) {
            out.write(tmp.array(), 0, readResult);
            tmp.clear();
            transferred += readResult;
            synchronized (mDataTransferListeners) {
                it = mDataTransferListeners.iterator();
                while (it.hasNext()) {
                    it.next().onTransferProgress(readResult, transferred, size, mFile.getName());
                }
            }
        }

    } catch (IOException io) {
        Log_OC.e("FileRequestException", io.getMessage());
        throw new RuntimeException(
                "Ugly solution to workaround the default policy of retries when the server falls while uploading ; temporal fix; really",
                io);

    } finally {
        channel.close();
        raf.close();
    }
}

From source file:eu.planets_project.tb.impl.data.util.DataHandlerImpl.java

public File copyLocalFileAsTempFileInExternallyAccessableDir(String localFileRef) throws IOException {
    //get a temporary file
    log.debug("copyLocalFileAsTempFileInExternallyAccessableDir");
    File f = this.createTempFileInExternallyAccessableDir();

    //copying one file to another with FileChannel 
    //@see http://www.exampledepot.com/egs/java.nio/File2File.html
    FileChannel srcChannel = new FileInputStream(localFileRef).getChannel();
    FileChannel dstChannel = new FileOutputStream(f).getChannel();
    log.debug("before transferring via FileChannel from src-inputStream: " + localFileRef
            + " to dest-outputStream: " + f.getAbsolutePath());
    // Copy file contents from source to destination
    dstChannel.transferFrom(srcChannel, 0, srcChannel.size());
    //Close the channels
    srcChannel.close();
    dstChannel.close();//from w  w  w  .  j  av a 2s . c  o  m
    log.debug("copyLocalFileAsTempFileInExternallyAccessableDir returning: " + f.getAbsolutePath());
    return f;
}

From source file:com.owncloud.android.lib.common.network.FileRequestEntity.java

@Override
public void writeRequest(final OutputStream out) throws IOException {
    //byte[] tmp = new byte[4096];
    ByteBuffer tmp = ByteBuffer.allocate(4096);
    int readResult = 0;

    //                    globally in some fashionable manner
    RandomAccessFile raf = new RandomAccessFile(mFile, "r");
    FileChannel channel = raf.getChannel();
    Iterator<OnDatatransferProgressListener> it = null;
    long transferred = 0;
    long size = mFile.length();
    if (size == 0)
        size = -1;/*  ww  w. j  a  va2  s  .com*/
    try {
        while ((readResult = channel.read(tmp)) >= 0) {
            out.write(tmp.array(), 0, readResult);
            tmp.clear();
            transferred += readResult;
            synchronized (mDataTransferListeners) {
                it = mDataTransferListeners.iterator();
                while (it.hasNext()) {
                    it.next().onTransferProgress(readResult, transferred, size, mFile.getAbsolutePath());
                }
            }
        }

    } catch (IOException io) {
        Log_OC.e("FileRequestException", io.getMessage());
        throw new RuntimeException(
                "Ugly solution to workaround the default policy of retries when the server falls while uploading ; temporal fix; really",
                io);

    } finally {
        channel.close();
        raf.close();
    }
}

From source file:edu.cmu.graphchi.shards.QueryShard.java

public QueryShard(String fileName, int shardNum, int numShards, VertexInterval interval, Config dbConfig)
        throws IOException {
    this.shardNum = shardNum;
    this.interval = interval;

    pinIndexToMemory = dbConfig.getBoolean("queryshard.pinindex");
    queryCacheSize = dbConfig.getInt("queryshard.cachesize");

    adjFile = new File(ChiFilenames.getFilenameShardsAdj(fileName, shardNum, numShards));
    numEdges = (int) (adjFile.length() / BYTES_PER_EDGE);

    FileChannel channel = new java.io.RandomAccessFile(adjFile, "rw").getChannel();
    adjBuffer = channel.map(FileChannel.MapMode.READ_WRITE, 0, adjFile.length()).asLongBuffer();
    channel.close();

    index = (pinIndexToMemory ? null : createSparseIndex());

    loadPointers();//  ww w. j  a v  a 2  s.co m
    loadInEdgeStartBuffer();
}

From source file:com.cerema.cloud2.lib.common.network.FileRequestEntity.java

@Override
public void writeRequest(final OutputStream out) throws IOException {
    //byte[] tmp = new byte[4096];
    ByteBuffer tmp = ByteBuffer.allocate(4096);
    int readResult = 0;

    // TODO(bprzybylski): each mem allocation can throw OutOfMemoryError we need to handle it
    //                    globally in some fashionable manner
    RandomAccessFile raf = new RandomAccessFile(mFile, "r");
    FileChannel channel = raf.getChannel();
    Iterator<OnDatatransferProgressListener> it = null;
    long transferred = 0;
    long size = mFile.length();
    if (size == 0)
        size = -1;// w w  w . j a va 2  s. com
    try {
        while ((readResult = channel.read(tmp)) >= 0) {
            out.write(tmp.array(), 0, readResult);
            tmp.clear();
            transferred += readResult;
            synchronized (mDataTransferListeners) {
                it = mDataTransferListeners.iterator();
                while (it.hasNext()) {
                    it.next().onTransferProgress(readResult, transferred, size, mFile.getAbsolutePath());
                }
            }
        }

    } catch (IOException io) {
        Log_OC.e("FileRequestException", io.getMessage());
        throw new RuntimeException(
                "Ugly solution to workaround the default policy of retries when the server falls while uploading ; temporal fix; really",
                io);

    } finally {
        channel.close();
        raf.close();
    }
}

From source file:com.MustacheMonitor.MustacheMonitor.FileUtils.java

/**
 * Copy a file/*w ww.  j a va  2 s .  c  o  m*/
 *
 * @param srcFile file to be copied
 * @param destFile destination to be copied to
 * @return a FileEntry object
 * @throws IOException
 * @throws InvalidModificationException
 * @throws JSONException
 */
private JSONObject copyFile(File srcFile, File destFile)
        throws IOException, InvalidModificationException, JSONException {
    // Renaming a file to an existing directory should fail
    if (destFile.exists() && destFile.isDirectory()) {
        throw new InvalidModificationException("Can't rename a file to a directory");
    }

    FileChannel input = new FileInputStream(srcFile).getChannel();
    FileChannel output = new FileOutputStream(destFile).getChannel();

    input.transferTo(0, input.size(), output);

    input.close();
    output.close();

    /*
    if (srcFile.length() != destFile.length()) {
    return false;
    }
    */

    return getEntry(destFile);
}

From source file:org.apache.tez.runtime.library.common.shuffle.Fetcher.java

private void releaseLock(FileLock lock) throws IOException {
    if (lock != null && lock.isValid()) {
        FileChannel lockChannel = lock.channel();
        lock.release();//w  w  w .  jav a 2 s.  com
        lockChannel.close();
    }
}