Example usage for java.nio.channels FileChannel close

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:org.jajuk.util.UtilSystem.java

/**
 * Save a file in the same directory with name <filename>_YYYYmmddHHMM.xml and
 * with a given maximum Mb size for the file and its backup files
 * //from   www  . ja v a 2  s  .  c o  m
 * @param file The file to back up
 * @param iMB 
 */
public static void backupFile(final File file, final int iMB) {
    try {
        if (Integer.parseInt(Conf.getString(Const.CONF_BACKUP_SIZE)) <= 0) {
            // 0 or less means no backup
            return;
        }
        // calculates total size in MB for the file to backup and its
        // backup files
        long lUsedMB = 0;
        final List<File> alFiles = new ArrayList<File>(10);
        final File[] files = new File(file.getAbsolutePath()).getParentFile().listFiles();
        if (files != null) {
            for (final File element : files) {
                if (element.getName().indexOf(UtilSystem.removeExtension(file.getName())) != -1) {
                    lUsedMB += element.length();
                    alFiles.add(element);
                }
            }
            // sort found files
            alFiles.remove(file);
            Collections.sort(alFiles);
            // too much backup files, delete older
            if (((lUsedMB - file.length()) / 1048576 > iMB) && (alFiles.size() > 0)) {
                final File fileToDelete = alFiles.get(0);
                if (fileToDelete != null) { //NOSONAR
                    if (!fileToDelete.delete()) {
                        Log.warn("Could not delete file " + fileToDelete);
                    }
                }
            }
        }
        // backup itself using nio, file name is
        // collection-backup-yyyMMdd.xml
        final String sExt = new SimpleDateFormat("yyyyMMdd", Locale.getDefault()).format(new Date());
        final File fileNew = new File(UtilSystem.removeExtension(file.getAbsolutePath()) + "-backup-" + sExt
                + "." + UtilSystem.getExtension(file));
        final FileChannel fcSrc = new FileInputStream(file).getChannel();
        try {
            final FileChannel fcDest = new FileOutputStream(fileNew).getChannel();
            try {
                fcDest.transferFrom(fcSrc, 0, fcSrc.size());
            } finally {
                fcDest.close();
            }
        } finally {
            fcSrc.close();
        }
    } catch (final IOException ie) {
        Log.error(ie);
    }
}

---

From source file:org.rzo.yajsw.os.ms.win.w32.WindowsJavaHome.java

/**
 * Copy file.//from  www  . j  a v  a  2s. c  o  m
 * 
 * @param in
 *            the in
 * @param out
 *            the out
 * 
 * @throws IOException
 *             Signals that an I/O exception has occurred.
 */
void copyFile(File in, File out) throws IOException {
    System.out.println("copying : " + in.getAbsolutePath() + " -> " + out.getAbsolutePath());
    FileChannel inChannel = new FileInputStream(in).getChannel();
    FileChannel outChannel = new FileOutputStream(out).getChannel();
    try {
        inChannel.transferTo(0, inChannel.size(), outChannel);
    } catch (IOException e) {
        throw e;
    } finally {
        if (inChannel != null)
            inChannel.close();
        if (outChannel != null)
            outChannel.close();
    }
}

---

From source file:org.gnucash.android.export.ExporterAsyncTask.java

/**
 * Copies a file from <code>src</code> to <code>dst</code>
 * @param src Absolute path to the source file
 * @param dst Absolute path to the destination file
 * @throws IOException if the file could not be copied
 *///from  www. j a va 2 s .  com
public void copyFile(File src, File dst) throws IOException {
    //TODO: Make this asynchronous at some time, t in the future.
    if (mExportParams.getExportFormat() == ExportFormat.QIF) {
        splitQIF(src, dst);
    } else {
        FileChannel inChannel = new FileInputStream(src).getChannel();
        FileChannel outChannel = new FileOutputStream(dst).getChannel();
        try {
            inChannel.transferTo(0, inChannel.size(), outChannel);
        } finally {
            if (inChannel != null)
                inChannel.close();
            if (outChannel != null)
                outChannel.close();
        }
    }
}

---

From source file:com.baidu.rigel.biplatform.tesseract.util.FileUtils.java

/**
 * readFile/*w  ww . j av a  2  s  .  co m*/
 * 
 * @param filePath ?
 * @return byte[]
 */
public static byte[] readFile(String filePath) {
    LOGGER.info(String.format(LogInfoConstants.INFO_PATTERN_FUNCTION_BEGIN, "readFile",
            "[filePath:" + filePath + "]"));
    if (StringUtils.isEmpty(filePath)) {
        LOGGER.info(String.format(LogInfoConstants.INFO_PATTERN_FUNCTION_EXCEPTION, "readFile",
                "[filePath:" + filePath + "]"));
        throw new IllegalArgumentException();

    }
    File file = new File(filePath);

    FileInputStream fin = null;
    FileChannel fcin = null;
    ByteBuffer rbuffer = ByteBuffer.allocate(TesseractConstant.FILE_BLOCK_SIZE);
    ByteArrayOutputStream bos = new ByteArrayOutputStream();

    if (file.exists()) {
        try {
            fin = new FileInputStream(file);
            fcin = fin.getChannel();
            while (fcin.read(rbuffer) != -1) {
                bos.write(rbuffer.array());
            }
        } catch (Exception e) {
            LOGGER.error(String.format(LogInfoConstants.INFO_PATTERN_FUNCTION_EXCEPTION, "readFile",
                    "[filePath:" + filePath + "]"), e);
        } finally {
            try {
                if (fin != null) {
                    fin.close();
                }
                if (fcin != null) {
                    fcin.close();
                }
                bos.close();
            } catch (Exception e) {
                LOGGER.error(String.format(LogInfoConstants.INFO_PATTERN_FUNCTION_EXCEPTION, "readFile",
                        "[filePath:" + filePath + "]"), e);
            }

        }
    }

    LOGGER.info(String.format(LogInfoConstants.INFO_PATTERN_FUNCTION_END, "readFile",
            "[filePath:" + filePath + "]"));
    return bos.toByteArray();
}

---

From source file:org.jajuk.util.UtilSystem.java

/**
 * Additional file checksum used to prevent bug #886098. Simply return some
 * bytes read at the middle of the file/* w  w  w .  j a va  2 s.  com*/
 * <p>
 * uses nio api for performances
 * 
 * @param fio 
 * 
 * @return the file checksum
 * 
 * @throws JajukException the jajuk exception
 */
public static String getFileChecksum(final File fio) throws JajukException {
    try {
        String sOut = "";
        final FileChannel fc = new FileInputStream(fio).getChannel();
        try {
            final ByteBuffer bb = ByteBuffer.allocate(500);
            fc.read(bb, fio.length() / 2);
            sOut = new String(bb.array());
        } finally {
            fc.close();
        }
        return MD5Processor.hash(sOut);
    } catch (final IOException e) {
        throw new JajukException(103, e);
    }
}

---

From source file:org.gcaldaemon.core.Configurator.java

public static final void copyFile(File from, File to) throws Exception {
    if (from == null || to == null || !from.exists()) {
        return;//from  ww w .j  ava  2s  .co  m
    }
    RandomAccessFile fromFile = null;
    RandomAccessFile toFile = null;
    try {
        fromFile = new RandomAccessFile(from, "r");
        toFile = new RandomAccessFile(to, "rw");
        FileChannel fromChannel = fromFile.getChannel();
        FileChannel toChannel = toFile.getChannel();
        long length = fromFile.length();
        long start = 0;
        while (start < length) {
            start += fromChannel.transferTo(start, length - start, toChannel);
        }
        fromChannel.close();
        toChannel.close();
    } finally {
        if (fromFile != null) {
            fromFile.close();
        }
        if (toFile != null) {
            toFile.close();
        }
    }
}

---

From source file:ga.rugal.jpt.common.tracker.common.Torrent.java

private static String hashFiles(List<File> files, int pieceLenght) throws InterruptedException, IOException {
    int threads = getHashingThreadsCount();
    ExecutorService executor = Executors.newFixedThreadPool(threads);
    ByteBuffer buffer = ByteBuffer.allocate(pieceLenght);
    List<Future<String>> results = new LinkedList<>();
    StringBuilder hashes = new StringBuilder();

    long length = 0L;
    int pieces = 0;

    long start = System.nanoTime();
    for (File file : files) {
        LOG.info("Hashing data from {} with {} threads ({} pieces)...", new Object[] { file.getName(), threads,
                (int) (Math.ceil((double) file.length() / pieceLenght)) });

        length += file.length();/*from   w ww  . ja  v  a2 s.com*/

        FileInputStream fis = new FileInputStream(file);
        FileChannel channel = fis.getChannel();
        int step = 10;

        try {
            while (channel.read(buffer) > 0) {
                if (buffer.remaining() == 0) {
                    buffer.clear();
                    results.add(executor.submit(new CallableChunkHasher(buffer)));
                }

                if (results.size() >= threads) {
                    pieces += accumulateHashes(hashes, results);
                }

                if (channel.position() / (double) channel.size() * 100f > step) {
                    LOG.info("  ... {}% complete", step);
                    step += 10;
                }
            }
        } finally {
            channel.close();
            fis.close();
        }
    }

    // Hash the last bit, if any
    if (buffer.position() > 0) {
        buffer.limit(buffer.position());
        buffer.position(0);
        results.add(executor.submit(new CallableChunkHasher(buffer)));
    }

    pieces += accumulateHashes(hashes, results);

    // Request orderly executor shutdown and wait for hashing tasks to
    // complete.
    executor.shutdown();
    while (!executor.isTerminated()) {
        Thread.sleep(10);
    }
    long elapsed = System.nanoTime() - start;

    int expectedPieces = (int) (Math.ceil((double) length / pieceLenght));
    LOG.info("Hashed {} file(s) ({} bytes) in {} pieces ({} expected) in {}ms.", new Object[] { files.size(),
            length, pieces, expectedPieces, String.format("%.1f", elapsed / 1e6), });

    return hashes.toString();
}

---

From source file:org.alfresco.repo.content.AbstractReadOnlyContentStoreTest.java

/**
 * Tests random access reading/*from ww w  .  ja v  a2s.com*/
 * <p>
 * Only executes if the reader implements {@link RandomAccessContent}.
 */
@Test
public void testRandomAccessRead() throws Exception {
    ContentStore store = getStore();
    String contentUrl = getExistingContentUrl();
    if (contentUrl == null) {
        logger.warn("Store test testRandomAccessRead not possible on " + store.getClass().getName());
        return;
    }
    // Get the reader
    ContentReader reader = store.getReader(contentUrl);
    assertNotNull("Reader should never be null", reader);

    FileChannel fileChannel = reader.getFileChannel();
    assertNotNull("No channel given", fileChannel);

    // check that no other content access is allowed
    try {
        reader.getReadableChannel();
        fail("Second channel access allowed");
    } catch (RuntimeException e) {
        // expected
    }
    fileChannel.close();
}

---

From source file:org.paxle.crawler.fs.impl.FsCrawler.java

private File copyChanneled(final File file, final ICrawlerDocument cdoc, final boolean useFsync) {
    logger.info(String.format("Copying '%s' using the copy mechanism of the OS%s", file,
            (useFsync) ? " with fsync" : ""));

    final ITempFileManager tfm = this.contextLocal.getCurrentContext().getTempFileManager();
    if (tfm == null) {
        cdoc.setStatus(ICrawlerDocument.Status.UNKNOWN_FAILURE,
                "Cannot access ITempFileMananger from " + Thread.currentThread().getName());
        return null;
    }/*w ww  . j a  v  a 2s.c  o  m*/

    FileInputStream fis = null;
    FileOutputStream fos = null;
    File out = null;
    try {
        out = tfm.createTempFile();
        fis = new FileInputStream(file);
        fos = new FileOutputStream(out);

        final FileChannel in_fc = fis.getChannel();
        final FileChannel out_fc = fos.getChannel();

        long txed = 0L;
        while (txed < in_fc.size())
            txed += in_fc.transferTo(txed, in_fc.size() - txed, out_fc);

        if (useFsync)
            out_fc.force(false);
        out_fc.close();

        try {
            detectFormats(cdoc, fis);
        } catch (IOException ee) {
            logger.warn(
                    String.format("Error detecting format of '%s': %s", cdoc.getLocation(), ee.getMessage()));
        }
    } catch (IOException e) {
        logger.error(String.format("Error copying '%s' to '%s': %s", cdoc.getLocation(), out, e.getMessage()),
                e);
        cdoc.setStatus(ICrawlerDocument.Status.UNKNOWN_FAILURE, e.getMessage());
    } finally {
        if (fis != null)
            try {
                fis.close();
            } catch (IOException e) {
                /* ignore */}
        if (fos != null)
            try {
                fos.close();
            } catch (IOException e) {
                /* ignore */}
    }
    return out;
}

---

From source file:org.forgerock.openidm.script.javascript.JavaScriptFactory.java

private Script initializeScript(String name, File source, boolean sharedScope) throws ScriptException {
    initDebugListener();//from   w  w w  .ja  v a2 s .  c o  m
    if (debugInitialised) {
        try {
            FileChannel inChannel = new FileInputStream(source).getChannel();
            FileChannel outChannel = new FileOutputStream(getTargetFile(name)).getChannel();
            FileLock outLock = outChannel.lock();
            FileLock inLock = inChannel.lock(0, inChannel.size(), true);
            inChannel.transferTo(0, inChannel.size(), outChannel);

            outLock.release();
            inLock.release();

            inChannel.close();
            outChannel.close();
        } catch (IOException e) {
            logger.warn("JavaScript source was not updated for {}", name, e);
        }
    }
    return new JavaScript(name, source, sharedScope);
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• »