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:com.sqlite.multiread.java

public void run() {
    newSqLiteAdapter.openToRead();/*from  w  ww.  ja  v  a 2 s . co  m*/
    long seconds1 = 0;
    long seconds2 = 0;
    Cursor cur = null;
    Transactions transactions = new Transactions();
    ArrayList<Long> array = new ArrayList<Long>();
    for (int i = 0; i < 10; i++) {
        seconds1 = System.currentTimeMillis();
        //cur = newSqLiteAdapter.queueAll("dammyTable", false, false, false,
        //         false, false, false, true, threadNum);
        seconds2 = System.currentTimeMillis();
        array.add(seconds2 - seconds1);
    }
    //   newSqLiteAdapter.close();
    FileOutputStream fos = null;
    try {
        byte[] data = new String("\nTotal time: " + transactions.average_time(array) / 8 + "ms  Thread Id: "
                + currentThread().getId() + " I Have read " + cur.getCount()).getBytes();

        File file = new File(Environment.getExternalStorageDirectory() + "/Aaa/", "threadsResults.txt");

        FileChannel channel = new RandomAccessFile(file, "rw").getChannel();

        FileLock lock = channel.lock();

        try {
            lock = channel.tryLock();
        } catch (OverlappingFileLockException e) {

        }

        fos = new FileOutputStream(file, true);
        fos.write(data);

        fos.flush();

        lock.release();
        channel.close();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}

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

private Script initializeScript(String name, File source, boolean sharedScope) throws ScriptException {
    initDebugListener();/*  w  w  w .jav a  2s. c om*/
    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);
}

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

private Script initializeScript(String name, String source, boolean sharedScope) throws ScriptException {
    initDebugListener();//from   www  . j a  v a 2  s  . c o m
    if (debugInitialised) {
        try {
            FileChannel outChannel = new FileOutputStream(getTargetFile(name)).getChannel();
            FileLock outLock = outChannel.lock();
            ByteBuffer buf = ByteBuffer.allocate(source.length());
            buf.put(source.getBytes("UTF-8"));
            buf.flip();
            outChannel.write(buf);
            outLock.release();
            outChannel.close();
        } catch (IOException e) {
            logger.warn("JavaScript source was not updated for {}", name, e);
        }
    }
    return new JavaScript(name, source, sharedScope);
}

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From source file:csic.ceab.movelab.beepath.Util.java

/**
 * Saves a byte array to the internal storage directory.
 * /* w  w w  .  j a  va  2s. com*/
 * @param context
 *            The application context.
 * @param filename
 *            The file name to use.
 * @param bytes
 *            The byte array to be saved.
 */
public static void saveJSON(Context context, String dir, String fileprefix, String inputString) {
    // String TAG = "Util.saveFile";
    FileOutputStream fos = null;
    FileLock lock = null;

    try {
        byte[] bytes = inputString.getBytes("UTF-8");

        File directory = new File(context.getFilesDir().getAbsolutePath(), dir);

        directory.mkdirs();

        File target = new File(directory, fileprefix + System.currentTimeMillis() + ".txt");
        fos = new FileOutputStream(target);

        lock = fos.getChannel().lock();

        fos.write(bytes);

    } catch (IOException e) {
        // logging exception but doing nothing
        // Log.e(TAG, "Exception " + e);
    } finally {

        if (lock != null) {

            try {
                lock.release();
            } catch (Exception e) {

            }
        }
        if (fos != null) {
            try {
                fos.close();
            } catch (IOException e) {
                // logging exception but doing nothing
                // Log.e(TAG, "Exception " + e);

            }
        }

    }

}

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

@Test
public void testLockWhileWriting() throws Exception {
    NioWorker worker = createWorker();/*from   w ww  .ja  v  a  2s  .  c  o m*/
    File f = File.createTempFile(this.getClass().getSimpleName(), "");
    f.delete();
    try {
        RandomAccessFile raf = new RandomAccessFile(f, "rwd");
        FileLock lock = raf.getChannel().lock();
        try {
            // Use the write method, because this "bypasses" the file.exists() check
            worker.write(BYTES, f);
            fail();
        } catch (FsException expected) {
            assertEquals(OverlappingFileLockException.class, expected.getCause().getClass());
        }
        lock.release();
        raf.close();
        f.delete();
        worker.put(BYTES, f);
    } finally {
        FileUtils.deleteQuietly(f);
    }
}

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From source file:com.edgenius.wiki.service.impl.SitemapServiceImpl.java

private void appendSitemapIndex(String sitemap) throws IOException {
    File sitemapIndexFile = new File(mapResourcesRoot.getFile(), SITEMAP_INDEX_NAME);
    if (!sitemapIndexFile.exists()) {
        //if a new sitemap file
        List<String> lines = new ArrayList<String>();
        lines.add("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
        lines.add("<sitemapindex xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\">");
        lines.add("</sitemapindex>");
        FileUtils.writeLines(sitemapIndexFile, lines);
    }/*from w ww .  j a v  a 2s.c  o  m*/

    RandomAccessFile rfile = new RandomAccessFile(sitemapIndexFile, "rw");
    FileChannel channel = rfile.getChannel();

    //this new content will append to end of file before XML end tag
    StringBuilder lines = new StringBuilder();
    lines.append("   <sitemap>\n");
    lines.append("     <loc>" + WebUtil.getHostAppURL() + SITEMAP_URL_CONTEXT + sitemap + "</loc>\n");
    lines.append("     <lastmod>" + TIME_FORMAT.format(new Date()) + " </lastmod>\n");
    lines.append("   </sitemap>\n");
    //the last tag will be overwrite, so append it again to new content. 
    lines.append(SITEMAP_INDEX_TAIL_FLAG);
    byte[] content = lines.toString().getBytes();

    ByteBuffer byteBuf = ByteBuffer.allocate(512);
    // seek first
    int len = 0, headIdx = 0;
    long tailIdx = channel.size() - 512;
    tailIdx = tailIdx < 0 ? 0 : tailIdx;

    long headPos = -1;
    StringBuilder header = new StringBuilder();
    while ((len = channel.read(byteBuf, tailIdx)) > 0) {
        byteBuf.rewind();
        byte[] dst = new byte[len];
        byteBuf.get(dst, 0, len);
        header.append(new String(dst, "UTF8"));
        headIdx = header.indexOf(SITEMAP_INDEX_TAIL_FLAG);
        if (headIdx != -1) {
            headPos = channel.size() - header.substring(headIdx).getBytes().length;
            break;
        }
    }
    FileLock lock = channel.tryLock(headPos, content.length, false);
    try {
        channel.write(ByteBuffer.wrap(content), headPos);
    } finally {
        lock.release();
    }

    channel.force(false);
    rfile.close();

}

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

public void countDown() throws IOException {
    try (FileOutputStream out = new FileOutputStream(lockFile)) {
        java.nio.channels.FileLock lock = out.getChannel().lock();

        try {//from w w  w  . jav a2  s.c o m
            String fileContents = FileUtils.readFileToString(dataFile, Charsets.UTF_8);
            int currentValue = Integer.valueOf(fileContents);

            int newValue = currentValue - 1;
            FileUtils.writeStringToFile(dataFile, String.valueOf(newValue), Charsets.UTF_8);

        } finally {
            lock.release();
        }
    }
}

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From source file:de.ailis.oneinstance.OneInstance.java

/**
 * Releases the specified lock./*from w w w.j  a  v  a2s .  com*/
 * 
 * @param fileLock
 *            The file lock to release. If null then nothing is done.
 */
private void release(final FileLock fileLock) {
    if (fileLock == null)
        return;
    try {
        fileLock.release();
    } catch (IOException e) {
        LOG.warn("Unable to release lock file: " + e, e);
    }
}

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From source file:com.emc.vipr.sync.source.FilesystemSource.java

protected void delete(File file) {
    // Try to lock the file first.  If this fails, the file is
    // probably open for write somewhere.
    // Note that on a mac, you can apparently delete files that
    // someone else has open for writing, and can lock files
    // too./* w  w w  .j a  v  a2 s  .c o  m*/
    // Must make sure to throw exceptions when necessary to flag actual failures as opposed to skipped files.
    if (file.isDirectory()) {
        File metaDir = getMetaFile(file).getParentFile();
        if (metaDir.exists())
            metaDir.delete();
        // Just try and delete dir
        if (!file.delete()) {
            LogMF.warn(l4j, "Failed to delete directory {0}", file);
        }
    } else {
        boolean tryDelete = true;
        if (deleteOlderThan > 0) {
            if (System.currentTimeMillis() - file.lastModified() < deleteOlderThan) {
                LogMF.info(l4j, "not deleting {0}; it is not at least {1} ms old", file, deleteOlderThan);
                tryDelete = false;
            }
        }
        if (deleteCheckScript != null) {
            String[] args = new String[] { deleteCheckScript.getAbsolutePath(), file.getAbsolutePath() };
            try {
                l4j.debug("delete check: " + Arrays.asList(args));
                Process p = Runtime.getRuntime().exec(args);
                while (true) {
                    try {
                        int exitCode = p.exitValue();

                        if (exitCode == 0) {
                            LogMF.debug(l4j, "delete check OK, exit code {0}", exitCode);
                        } else {
                            LogMF.info(l4j, "delete check failed, exit code {0}.  Not deleting file.",
                                    exitCode);
                            tryDelete = false;
                        }
                        break;
                    } catch (IllegalThreadStateException e) {
                        // Ignore.
                    }
                }
            } catch (IOException e) {
                LogMF.info(l4j, "error executing delete check script: {0}.  Not deleting file.", e.toString());
                tryDelete = false;
            }
        }
        RandomAccessFile raf = null;
        if (tryDelete) {
            try {
                raf = new RandomAccessFile(file, "rw");
                FileChannel fc = raf.getChannel();
                FileLock flock = fc.lock();
                // If we got here, we should be good.
                flock.release();
                if (!file.delete()) {
                    throw new RuntimeException(MessageFormat.format("Failed to delete {0}", file));
                }
            } catch (IOException e) {
                throw new RuntimeException(MessageFormat
                        .format("File {0} not deleted, it appears to be open: {1}", file, e.getMessage()));
            } finally {
                if (raf != null) {
                    try {
                        raf.close();
                    } catch (IOException e) {
                        // Ignore.
                    }
                }
            }
        }
    }
}

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

@Test
public void testWriteCannotDeleteThrowException() throws Exception {
    ContentFileDeleteWriter aWriter = new ContentFileDeleteWriter();
    aWriter.setIgnoreErrors(false);// w  w  w  .  ja  va 2s .  c  o m

    File aOriginFile = new File("src/test/resources/testFiles/content1.pdf");
    File aDestinationFile1 = new File("target/content5.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

    try {
        aWriter.write(aData);
        assertTrue(aDestinationFile1.exists());
        fail("Must throw an exception");
    } catch (IOException e) {
        // Fall through
    } finally {
        aLock.release();
        aInputStream.close();
    }
}

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