Example usage for java.nio.channels FileLock release

Introduction

In this page you can find the example usage for java.nio.channels FileLock release.

Prototype

public abstract void release() throws IOException;

Source Link

Document

Releases this lock.

Usage

From source file:in.bbat.license.LicenseManager.java

public static void cleanupOlderLicenseFiles() {
    File localFile1 = new File("");
    File[] arrayOfFile1 = localFile1.listFiles(new FilenameFilter() {
        public boolean accept(File paramAnonymousFile, String paramAnonymousString) {
            return paramAnonymousString.endsWith(".license.lock");
        }//w ww .ja v a 2s .  c o m
    });
    for (File localFile2 : arrayOfFile1) {
        FileLock localFileLock = null;
        RandomAccessFile localRandomAccessFile = null;
        try {
            localRandomAccessFile = new RandomAccessFile(localFile2, "rw");
            localFileLock = localRandomAccessFile.getChannel().tryLock();
        } catch (Exception localException) {
            localFileLock = null;
        }
        if (localFileLock != null) {
            try {
                localFileLock.release();
                localRandomAccessFile.close();
            } catch (IOException localIOException1) {
                LOG.error("Error releasing an acquired lock. No problem, continuing!");
            }
            String str = null;
            try {
                str = FileUtils.readFileToString(localFile2);
                returnOlderLicense(str);
                localFile2.delete();
            } catch (IOException localIOException2) {
                LOG.error("Error returning an older license that is no longer valid. No problem, continuing!");
            }
        }
    }
}

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From source file:ubicrypt.core.Utils.java

public static boolean isAppInUse(final Path ubiqFolder) throws IOException {
    Files.createDirectories(ubiqFolder);
    final File file = Paths.get(ubiqFolder.toString(), "lock").toFile();
    final FileChannel channel = new RandomAccessFile(file, "rw").getChannel();

    final FileLock lock;
    try {/*from w w w  .  jav a2s .  c om*/
        lock = channel.tryLock();
    } catch (final OverlappingFileLockException e) {
        return true;
    }
    if (lock == null) {
        return true;
    }
    Runtime.getRuntime().addShutdownHook(new Thread() {
        public void run() {
            try {
                lock.release();
                channel.close();
            } catch (final Exception e) {
                e.printStackTrace();
            }
        }
    });
    return false;
}

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From source file:org.ow2.proactive.resourcemanager.updater.RMNodeUpdater.java

private static boolean makeNodeUpToDate() {
    if (System.getProperty(NODE_URL_PROPERTY) != null) {

        String jarUrl = System.getProperty(NODE_URL_PROPERTY);
        String jarFile = SCHEDULER_NODE_JAR;

        if (System.getProperty(NODE_JAR_PROPERTY) != null) {
            jarFile = System.getProperty(NODE_JAR_PROPERTY);
        }/*from ww w  .jav a 2s  .c o  m*/

        if (!isLocalJarUpToDate(jarUrl, jarFile)) {
            System.out.println("Downloading node.jar from " + jarUrl + " to " + jarFile);

            try {
                File destination = new File(jarFile);
                File lockFile = null;
                FileLock lock = null;

                if (destination.exists()) {

                    lockFile = new File(System.getProperty(TMP_DIR_PROPERTY) + "/lock");
                    if (!lockFile.exists()) {
                        lockFile.createNewFile();
                    }

                    System.out.println("Getting the lock on " + lockFile.getAbsoluteFile());
                    FileChannel channel = new RandomAccessFile(lockFile, "rw").getChannel();
                    lock = channel.lock();

                    if (isLocalJarUpToDate(jarUrl, jarFile)) {
                        System.out.println("Another process downloaded node.jar - don't do it anymore");
                        System.out.println("Releasing the lock on " + lockFile.getAbsoluteFile());
                        lock.release();
                        channel.close();

                        return false;
                    }
                }

                FileUtils.copyURLToFile(new URL(jarUrl), destination);
                System.out.println("Download finished");

                if (lock != null && lockFile != null) {
                    System.out.println("Releasing the lock on " + lockFile.getAbsoluteFile());
                    lock.release();
                }

                return true;

            } catch (Exception e) {
                System.err.println("Cannot download node.jar from " + jarUrl);
                e.printStackTrace();
            }
        }
    } else {
        System.out.println(
                "No java property " + NODE_URL_PROPERTY + " specified. Do not check for the new version.");
    }

    return false;
}

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From source file:it.geosolutions.tools.io.file.IOUtils.java

/**
 * Optimize version of copy method for file channels.
 * /*w ww . j a  v  a  2 s  .co m*/
 * @param bufferSize
 *            size of the temp buffer to use for this copy.
 * @param source
 *            the source {@link ReadableByteChannel}.
 * @param destination
 *            the destination {@link WritableByteChannel};.
 * @throws IOException
 *             in case something bad happens.
 */
public static void copyFileChannel(int bufferSize, FileChannel source, FileChannel destination)
        throws IOException {

    Objects.notNull(source, destination);
    if (!source.isOpen() || !destination.isOpen())
        throw new IllegalStateException("Source and destination channels must be open.");
    FileLock lock = null;
    try {

        lock = destination.lock();
        final long sourceSize = source.size();
        long pos = 0;
        while (pos < sourceSize) {
            // read and flip
            final long remaining = (sourceSize - pos);
            final int mappedZoneSize = remaining >= bufferSize ? bufferSize : (int) remaining;
            destination.transferFrom(source, pos, mappedZoneSize);
            // update zone
            pos += mappedZoneSize;

        }
    } finally {
        if (lock != null) {
            try {
                lock.release();
            } catch (Throwable t) {
                if (LOGGER.isInfoEnabled())
                    LOGGER.info(t.getLocalizedMessage(), t);
            }
        }

    }
}

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From source file:gemlite.core.internal.support.system.WorkPathHelper.java

public void unlock(FileLock lock) {
    if (lock != null) {
        try {//from  w  w w. j a v  a 2 s .co m
            lock.release();
        } catch (IOException x) {
            throw new RuntimeException(x);
        }
        lock = null;
    }
}

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From source file:org.apache.geode.test.concurrent.FileBasedCountDownLatch.java

public FileBasedCountDownLatch(int count) throws IOException {
    lockFile = File.createTempFile("CountDownLatchLock", ".txt");
    dataFile = File.createTempFile("CountDownLatchData", ".txt");

    try (FileOutputStream out = new FileOutputStream(lockFile)) {
        java.nio.channels.FileLock lock = out.getChannel().lock();
        try {/*from  ww  w  . j  a  v a2s  . c o m*/
            FileUtils.writeStringToFile(dataFile, String.valueOf(count), Charsets.UTF_8);
        } finally {
            lock.release();
        }
    }

    lockFile.deleteOnExit();
}

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From source file:fr.acxio.tools.agia.alfresco.ContentFileDeleteWriterTest.java

@Test
public void testWriteCannotDelete() throws Exception {
    ContentFileDeleteWriter aWriter = new ContentFileDeleteWriter();

    File aOriginFile = new File("src/test/resources/testFiles/content1.pdf");
    File aDestinationFile1 = new File("target/content4.pdf");
    FileCopyUtils.copy(aOriginFile, aDestinationFile1);

    List<NodeList> aData = new ArrayList<NodeList>();
    aData.add(createNodeList(aDestinationFile1.getAbsolutePath()));

    assertTrue(aDestinationFile1.exists());

    FileInputStream aInputStream = new FileInputStream(aDestinationFile1);
    FileLock aLock = aInputStream.getChannel().lock(0L, Long.MAX_VALUE, true); // shared lock

    aWriter.write(aData);//  w w  w. ja  v a  2  s . co m

    aLock.release();
    aInputStream.close();

    assertTrue(aDestinationFile1.exists());
}

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From source file:org.apache.geode.test.concurrent.FileBasedCountDownLatch.java

protected int currentValue() throws IOException {
    try (FileOutputStream out = new FileOutputStream(lockFile)) {
        java.nio.channels.FileLock lock = out.getChannel().lock();
        try {//from w  ww .ja va2s  .c o m
            String fileContents = FileUtils.readFileToString(dataFile, Charsets.UTF_8);
            return Integer.valueOf(fileContents);
        } finally {
            lock.release();
        }
    }
}

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From source file:org.geoserver.rest.util.IOUtils.java

/**
 * Optimize version of copy method for file channels.
 * /*from w w w. ja  v a 2s .com*/
 * @param bufferSize size of the temp buffer to use for this copy.
 * @param source the source {@link ReadableByteChannel}.
 * @param destination the destination {@link WritableByteChannel};.
 * @throws IOException in case something bad happens.
 */
public static void copyFileChannel(int bufferSize, FileChannel source, FileChannel destination)
        throws IOException {

    inputNotNull(source, destination);
    if (!source.isOpen() || !destination.isOpen())
        throw new IllegalStateException("Source and destination channels must be open.");
    FileLock lock = null;
    try {

        lock = destination.lock();
        final long sourceSize = source.size();
        long pos = 0;
        while (pos < sourceSize) {
            // read and flip
            final long remaining = (sourceSize - pos);
            final int mappedZoneSize = remaining >= bufferSize ? bufferSize : (int) remaining;
            destination.transferFrom(source, pos, mappedZoneSize);
            // update zone
            pos += mappedZoneSize;

        }
    } finally {
        if (lock != null) {
            try {
                lock.release();
            } catch (Throwable t) {
                if (LOGGER.isLoggable(Level.INFO))
                    LOGGER.log(Level.INFO, t.getLocalizedMessage(), t);
            }
        }

    }
}

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From source file:com.adaptris.fs.NioWorkerTest.java

@Test
public void testLockWhileReading() throws Exception {
    FsWorker worker = createWorker();// w  w w. jav  a 2  s.co  m
    File f = File.createTempFile(this.getClass().getSimpleName(), "");
    f.delete();
    try {
        worker.put(BYTES, f);

        RandomAccessFile raf = new RandomAccessFile(f, "rwd");
        FileLock lock = raf.getChannel().lock();
        try {
            worker.get(f);
            fail();
        } catch (FsException expected) {
            assertEquals(OverlappingFileLockException.class, expected.getCause().getClass());
        }
        lock.release();
        raf.close();
        worker.get(f);
    } finally {
        FileUtils.deleteQuietly(f);
    }
}

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