Java Utililty Methods FileLock

List of utility methods to do FileLock

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Description

The list of methods to do FileLock are organized into topic(s).

Method

voidpauseForLock(File f, int frequency, int totalTime)
Waits for a file lock for a given time, with a given frequency. 
int waited = 0;
final FileOutputStream out = new FileOutputStream(f);
try {
    FileLock lock = out.getChannel().tryLock();
    try {
        while (lock == null) {
            Thread.sleep(frequency);
            waited += frequency;
...
voidreleaseQuietly(FileLock lock)
release Quietly 
try {
    lock.release();
} catch (Throwable t) {
voidreleaseQuietly(final FileLock lock)
Releases the given lock quietly - no logging, no exception 
if (null != lock) {
    try {
        lock.release();
    } catch (final IOException io) {
voidreleaseSilent(FileLock fileLock)
release Silent 
if (fileLock != null) {
    try {
        fileLock.release();
    } catch (IOException ex) {
voidsetNonBlockingFD(Channel c, boolean blocking)
set Non Blocking FD 
if (c instanceof SelectableChannel) {
    ((SelectableChannel) c).configureBlocking(blocking);
FileLocktryLock(File file)
try Lock 
FileLock toReturn = null;
try {
    RandomAccessFile raf = new RandomAccessFile(file, "rw");
    try {
        FileChannel channel = raf.getChannel();
        toReturn = channel.tryLock();
        raf.writeBytes("lock file for: " + ManagementFactory.getRuntimeMXBean().getName());
    } finally {
...
FileLocktrylock(File file, boolean shared)
Use unlock to release lock and avoid channel leaks. 
FileChannel chan = new RandomAccessFile(file, "rw").getChannel();
return chan.tryLock(0, Long.MAX_VALUE, shared);
booleantryLock(File location)
try Lock 
if (location == null) {
    location = getDataFolder();
if (exclusiveLock != null) {
    return false;
try {
    FileChannel lock = new RandomAccessFile(new File(location, LOCK_FILE_NAME), "rw").getChannel(); 
...
voidunblockSocket(SelectableChannel... channels)
unblock Socket 
for (SelectableChannel ch : channels) {
    ch.configureBlocking(false);
voidunlock(File file)
unlock 
FileLock lock = locks.get(file);
if (lock != null) {
    try {
        lock.release();
    } catch (IOException e) {
    locks.remove(file);