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:org.pentaho.di.trans.steps.excelinput.PoiWorkBookIT.java

License:asdf

@Test
public void testResourceFree() throws Exception {
    FileLock lock = null;
    RandomAccessFile randomAccessFile = null;
    try {//from w ww. j  a  v  a2 s.  c o m
        readData(sampleFile, null);
        File fileAfterRead = new File(sampleFile);
        randomAccessFile = new RandomAccessFile(fileAfterRead, "rw");
        FileChannel fileChannel = randomAccessFile.getChannel();
        lock = fileChannel.tryLock();
        // check that we could lock file
        assertTrue(lock.isValid());
    } finally {
        if (lock != null) {
            lock.release();
        }
        if (randomAccessFile != null) {
            randomAccessFile.close();
        }
    }
}

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From source file:com.thoughtworks.go.config.GoConfigFileWriter.java

public synchronized void writeToConfigXmlFile(String content) {
    FileChannel channel = null;//from   ww  w  .j  a  va2 s  .com
    FileOutputStream outputStream = null;
    FileLock lock = null;

    try {
        RandomAccessFile randomAccessFile = new RandomAccessFile(fileLocation(), "rw");
        channel = randomAccessFile.getChannel();
        lock = channel.lock();
        randomAccessFile.seek(0);
        randomAccessFile.setLength(0);
        outputStream = new FileOutputStream(randomAccessFile.getFD());

        IOUtils.write(content, outputStream, UTF_8);
    } catch (Exception e) {
        throw new RuntimeException(e);
    } finally {
        if (channel != null && lock != null) {
            try {
                lock.release();
                channel.close();
                IOUtils.closeQuietly(outputStream);
            } catch (IOException e) {
                LOGGER.error("Error occured when releasing file lock and closing file.", e);
            }
        }
    }
}

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From source file:org.pentaho.di.trans.steps.excelinput.StaxWorkBookTest.java

@Test
public void testRead() throws Exception {
    FileLock lock = null;
    RandomAccessFile randomAccessFile = null;
    try {//from  w w w.  ja v  a  2 s. c om
        readData();
        File fileAfterRead = new File("testfiles/sample-file.xlsx");
        randomAccessFile = new RandomAccessFile(fileAfterRead, "rw");
        FileChannel fileChannel = randomAccessFile.getChannel();
        lock = fileChannel.tryLock();
        // check that we could lock file
        assertTrue(lock.isValid());
    } finally {
        if (lock != null) {
            lock.release();
        }
        if (randomAccessFile != null) {
            randomAccessFile.close();
        }
    }
}

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From source file:org.apache.hadoop.hdfs.server.datanode.DataStorage.java

public boolean isConversionNeeded(StorageDirectory sd) throws IOException {
    File oldF = new File(sd.getRoot(), "storage");
    if (!oldF.exists())
        return false;
    // check the layout version inside the storage file
    // Lock and Read old storage file
    RandomAccessFile oldFile = new RandomAccessFile(oldF, "rws");
    FileLock oldLock = oldFile.getChannel().tryLock();
    try {/*from  w  ww  .  j  ava  2s  . c  o  m*/
        oldFile.seek(0);
        int oldVersion = oldFile.readInt();
        if (oldVersion < LAST_PRE_UPGRADE_LAYOUT_VERSION)
            return false;
    } finally {
        oldLock.release();
        oldFile.close();
    }
    return true;
}

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From source file:org.pentaho.di.trans.steps.excelinput.StaxWorkBookIT.java

@Test
public void testRead() throws Exception {
    FileLock lock = null;
    RandomAccessFile randomAccessFile = null;
    try {/*from  www  .  j a v a  2s.  c o  m*/
        readData(sample);
        File fileAfterRead = new File(sample);
        randomAccessFile = new RandomAccessFile(fileAfterRead, "rw");
        FileChannel fileChannel = randomAccessFile.getChannel();
        lock = fileChannel.tryLock();
        // check that we could lock file
        assertTrue(lock.isValid());
    } finally {
        if (lock != null) {
            lock.release();
        }
        if (randomAccessFile != null) {
            randomAccessFile.close();
        }
    }
}

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From source file:com.openddal.test.BaseTestCase.java

/**
 * Log an error message.//from   w  w w  .ja v  a 2 s  . c o m
 *
 * @param s the message
 * @param e the exception
 */
public static void logError(String s, Throwable e) {
    if (e == null) {
        e = new Exception(s);
    }
    System.out.flush();
    System.err.println("ERROR: " + s + " " + e.toString() + " ------------------------------");
    e.printStackTrace();
    // synchronize on this class, because file locks are only visible to
    // other JVMs
    synchronized (BaseTestCase.class) {
        try {
            // lock
            FileChannel fc = FilePath.get("error.lock").open("rw");
            FileLock lock;
            while (true) {
                lock = fc.tryLock();
                if (lock != null) {
                    break;
                }
                Thread.sleep(10);
            }
            // append
            FileWriter fw = new FileWriter("error.txt", true);
            PrintWriter pw = new PrintWriter(fw);
            e.printStackTrace(pw);
            pw.close();
            fw.close();
            // unlock
            lock.release();
        } catch (Throwable t) {
            t.printStackTrace();
        }
    }
    System.err.flush();
}

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From source file:fr.acxio.tools.agia.tasks.FileCopyTaskletTest.java

@Test
public void testCannotEmptyOrigin() throws Exception {
    FileCopyTasklet aTasklet = new FileCopyTasklet();
    aTasklet.setOrigin(new FileSystemResource("src/test/resources/testFiles/input.csv"));
    aTasklet.setDestination(new FileSystemResource("target/input-copy8.csv"));
    aTasklet.execute(null, null);//from   w  ww .j  av  a 2 s.  c o m

    File aOrigin = aTasklet.getDestination().getFile();
    assertTrue(aOrigin.exists());
    FileInputStream aInputStream = new FileInputStream(aOrigin);
    FileLock aLock = aInputStream.getChannel().lock(0L, Long.MAX_VALUE, true); // shared lock

    aTasklet.setEmptyOrigin(true);
    aTasklet.setOrigin(new FileSystemResource("target/input-copy8.csv"));
    aTasklet.setDestination(new FileSystemResource("target/input-copy9.csv"));
    try {
        aTasklet.execute(null, null);
        fail("Must throw a FileCopyException");
    } catch (FileCopyException e) {
        // Fallthrough
    } finally {
        aLock.release();
        aInputStream.close();
    }
}

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From source file:fr.acxio.tools.agia.tasks.FileCopyTaskletTest.java

@Test
public void testCannotDeleteOrigin() throws Exception {
    FileCopyTasklet aTasklet = new FileCopyTasklet();
    aTasklet.setOrigin(new FileSystemResource("src/test/resources/testFiles/input.csv"));
    aTasklet.setDestination(new FileSystemResource("target/input-copy4.csv"));
    aTasklet.execute(null, null);/*  w ww. j a  va2s  . co m*/

    File aOrigin = aTasklet.getDestination().getFile();
    assertTrue(aOrigin.exists());
    FileInputStream aInputStream = new FileInputStream(aOrigin);
    FileLock aLock = aInputStream.getChannel().lock(0L, Long.MAX_VALUE, true); // shared lock

    aTasklet.setDeleteOrigin(true);
    aTasklet.setOrigin(new FileSystemResource("target/input-copy4.csv"));
    aTasklet.setDestination(new FileSystemResource("target/input-copy5.csv"));
    try {
        aTasklet.execute(null, null);
        fail("Must throw a FileCopyException");
    } catch (FileCopyException e) {
        // Fallthrough
    } finally {
        aLock.release();
        aInputStream.close();
    }
}

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From source file:org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerSecurityUpdaterTask.java

private void writeInternal(Path target, ByteBuffer data) throws IOException {
    try (FileChannel fc = FileChannel.open(target, StandardOpenOption.WRITE, StandardOpenOption.CREATE,
            StandardOpenOption.TRUNCATE_EXISTING)) {
        int numOfRetries = 0;
        FileLock lock = null;
        while (lock == null && numOfRetries < 5) {
            try {
                lock = fc.tryLock();/*from   ww  w .  j  ava2 s  .com*/
                fc.write(data);
            } catch (OverlappingFileLockException ex) {
                lock = null;
                numOfRetries++;
                try {
                    TimeUnit.MILLISECONDS.sleep(100);
                } catch (InterruptedException iex) {
                    throw new IOException(iex);
                }
            } finally {
                if (lock != null) {
                    lock.release();
                }
            }
        }
    }
}

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From source file:io.github.eternalbits.compactvd.CompactVD.java

private void compact(File file, int options) throws IOException {
    long mtime = file.lastModified();
    task = DiskImageProgress.COMPACT;/*from   w ww.j  a  va2s.c  o  m*/
    try (RandomAccessFile check = new RandomAccessFile(file, "r")) { // is file?
        try (DiskImage image = DiskImages.open(file, "rw")) {
            FileLock fileLock = image.tryLock();
            verboseProgress(SEARCHING_SPACE);
            image.addObserver(this, false);
            image.optimize(options);
            image.removeObserver(this);
            if (!isCancelled()) {
                verboseProgress("Compacting " + file.getName());
                image.addObserver(this, false);
                image.compact();
                image.removeObserver(this);
            }
            fileLock.release();
        }
    } finally {
        System.out.println(String.format(mtime != file.lastModified() ? IMAGE_CHANGED : IMAGE_NOT_CHANGED,
                file.getName()));
    }
}

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