Java Code Examples for java.nio.channels.FileLock#release()
The following examples show how to use
java.nio.channels.FileLock#release() .
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Example 1
| Source File: DataStorage.java From hadoop with Apache License 2.0 | 6 votes |
|
@Override
public boolean isPreUpgradableLayout(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 {
oldFile.seek(0);
int oldVersion = oldFile.readInt();
if (oldVersion < LAST_PRE_UPGRADE_LAYOUT_VERSION)
return false;
} finally {
oldLock.release();
oldFile.close();
}
return true;
}
Example 2
| Source File: FileWriteStream.java From baratine with GNU General Public License v2.0 | 6 votes |
|
public boolean unlock()
{
try {
FileLock lock = _fileLock;
_fileLock = null;
if (lock != null) {
lock.release();
return true;
}
return false;
} catch (IOException e) {
log.log(Level.FINE, e.toString(), e);
return false;
}
}
Example 3
| Source File: Stream.java From jphp with Apache License 2.0 | 6 votes |
|
@Signature({@Arg("path"), @Arg("data"), @Arg(value = "mode", optional = @Optional("w+"))})
public static Memory putContents(Environment env, Memory... args) throws Throwable {
Stream stream = create(env, args[0].toString(), args[2].toString());
FileLock lock = null;
try {
if (stream instanceof FileStream) {
lock = ((FileStream) stream).getAccessFile().getChannel().lock();
}
try {
return env.invokeMethod(stream, "write", args[1]);
} finally {
if (lock != null) {
lock.release();
}
}
} finally {
env.invokeMethod(stream, "close");
}
}
Example 4
| Source File: DocArchiveLockManager.java From birt with Eclipse Public License 1.0 | 6 votes |
|
/**
* unlock the previous locked file.
*
* @param lockObj
* the object get from the lock.
*/
public void unlock( Object lockObj )
{
if ( lockObj instanceof Lock )
{
Lock lock = (Lock) lockObj;
FileLock fLock = lock.lock;
FileChannel channel = fLock.channel( );
try
{
fLock.release( );
}
catch ( Exception ex )
{
log.log( Level.FINE, "exception occus while release the lock",
ex );
}
// after unlock the file, notify the waiting threads
synchronized ( channel )
{
channel.notify( );
}
releaseChannel( lock.name );
}
}
Example 5
| Source File: FileReadStream.java From baratine with GNU General Public License v2.0 | 6 votes |
|
public boolean unlock()
{
try {
FileLock lock = _fileLock;
_fileLock = null;
if (lock != null) {
lock.release();
return true;
}
return false;
} catch (IOException e) {
log.log(Level.FINE, e.toString(), e);
return false;
}
}
Example 6
| Source File: Storage.java From big-c with Apache License 2.0 | 6 votes |
|
/**
* Check whether underlying file system supports file locking.
*
* @return <code>true</code> if exclusive locks are supported or
* <code>false</code> otherwise.
* @throws IOException
* @see StorageDirectory#lock()
*/
public boolean isLockSupported() throws IOException {
FileLock firstLock = null;
FileLock secondLock = null;
try {
firstLock = lock;
if(firstLock == null) {
firstLock = tryLock();
if(firstLock == null)
return true;
}
secondLock = tryLock();
if(secondLock == null)
return true;
} finally {
if(firstLock != null && firstLock != lock) {
firstLock.release();
firstLock.channel().close();
}
if(secondLock != null) {
secondLock.release();
secondLock.channel().close();
}
}
return false;
}
Example 7
| Source File: JournalKeeperState.java From journalkeeper with Apache License 2.0 | 6 votes |
|
public void init(Path path, List<URI> voters, Set<Integer> partitions, URI preferredLeader) throws IOException {
Files.createDirectories(path.resolve(USER_STATE_PATH));
InternalState internalState = new InternalState(new ConfigState(voters), partitions, preferredLeader);
File lockFile = path.getParent().resolve(path.getFileName() + ".lock").toFile();
try (RandomAccessFile raf = new RandomAccessFile(lockFile, "rw");
FileChannel fileChannel = raf.getChannel()) {
FileLock lock = fileChannel.tryLock();
if (null == lock) {
throw new ConcurrentModificationException(
String.format(
"Some other thread is operating the state files! State: %s.", path.toString()
));
} else {
flushInternalState(internalStateFile(path), internalState);
lock.release();
}
} finally {
lockFile.delete();
}
}
Example 8
| Source File: FileLockNodeManager.java From activemq-artemis with Apache License 2.0 | 5 votes |
|
@Override
public boolean isBackupLive() throws Exception {
FileLock liveAttemptLock;
liveAttemptLock = tryLock(FileLockNodeManager.LIVE_LOCK_POS);
if (liveAttemptLock == null) {
return true;
} else {
liveAttemptLock.release();
return false;
}
}
Example 9
| Source File: DiskStoreImpl.java From gemfirexd-oss with Apache License 2.0 | 5 votes |
|
void closeLockFile() {
FileLock myfl = this.fl;
if (myfl != null) {
try {
FileChannel fc = myfl.channel();
if (myfl.isValid()) {
myfl.release();
}
fc.close();
} catch (IOException ignore) {
}
this.fl = null;
}
File f = this.lockFile;
if (f != null) {
if (f.delete()) {
if (logger.fineEnabled()) {
logger.fine("Deleted lock file " + f);
}
} else if (f.exists()) {
if (logger.fineEnabled()) {
logger.fine("Could not delete lock file " + f);
}
}
}
logger.info(LocalizedStrings.DEBUG, "Unlocked disk store " + name); // added
// to
// help
// debug
// 41734
}
Example 10
| Source File: IOUtils.java From metrics with Apache License 2.0 | 5 votes |
|
public static void closeQuietly(FileLock fileLock) {
try {
if (fileLock != null) {
fileLock.release();
}
} catch (final IOException ioe) {
// ignore
ioe.printStackTrace();
}
}
Example 11
| Source File: AbstractModelLoader.java From FATE-Serving with Apache License 2.0 | 5 votes |
|
protected void doStore(Context context, byte[] data, File file) {
if (file == null) {
return;
}
// Save
try {
File lockfile = new File(file.getAbsolutePath() + ".lock");
if (!lockfile.exists()) {
lockfile.createNewFile();
}
try (RandomAccessFile raf = new RandomAccessFile(lockfile, "rw");
FileChannel channel = raf.getChannel()) {
FileLock lock = channel.tryLock();
if (lock == null) {
throw new IOException("Can not lock the registry cache file " + file.getAbsolutePath() + ", ignore and retry later, maybe multi java process use the file");
}
try {
if (!file.exists()) {
file.createNewFile();
}
try (FileOutputStream outputFile = new FileOutputStream(file)) {
outputFile.write(data);
}
} finally {
lock.release();
}
}
} catch (Throwable e) {
logger.error("Failed to save model cache file, will retry, cause: " + e.getMessage(), e);
}
}
Example 12
| Source File: Close.java From joyqueue with Apache License 2.0 | 5 votes |
|
/**
* 关闭文件锁
*
* @param lock 文件锁
* @return
*/
public static Close close(final FileLock lock) {
if (lock != null) {
try {
lock.release();
} catch (IOException e) {
}
}
return instance;
}
Example 13
| Source File: StreamerUtils.java From WandFix with MIT License | 5 votes |
|
public static void safeClose(FileLock closeable) {
if (closeable != null) {
try {
if (Build.VERSION.SDK_INT > 18) {
closeable.close();
} else {
closeable.release();
}
} catch (Throwable e) {
}
}
}
Example 14
| Source File: FileLocking.java From LearningOfThinkInJava with Apache License 2.0 | 5 votes |
|
public static void main(String[] args) throws Exception{
FileOutputStream fos=new FileOutputStream("");
FileLock fl=fos.getChannel().tryLock();
if(fl!=null){
System.out.println("Locked File");
TimeUnit.MILLISECONDS.sleep(100);
fl.release();
System.out.println("Released Lock");
}
fos.close();
}
Example 15
| Source File: AtlasFileLock.java From AtlasForAndroid with MIT License | 5 votes |
|
public void unLock(File file) {
if (file == null || this.mRefCountMap.containsKey(file.getAbsolutePath())) {
FileLock fileLock = ((FileLockCount) this.mRefCountMap.get(file.getAbsolutePath())).mFileLock;
if (fileLock != null && fileLock.isValid()) {
try {
if (RefCntDec(file.getAbsolutePath()) <= 0) {
fileLock.release();
Log.i(TAG, processName + " FileLock " + file.getAbsolutePath() + " SUC! ");
}
} catch (IOException e) {
}
}
}
}
Example 16
| Source File: Sharing.java From openjdk-8 with GNU General Public License v2.0 | 4 votes |
|
/**
* Exercise FileDispatcher close()/preClose()
*/
private static void TestMultipleFD() throws Exception {
RandomAccessFile raf = null;
FileOutputStream fos = null;
FileInputStream fis = null;
FileChannel fc = null;
FileLock fileLock = null;
File test1 = new File("test1");
try {
raf = new RandomAccessFile(test1, "rw");
fos = new FileOutputStream(raf.getFD());
fis = new FileInputStream(raf.getFD());
fc = raf.getChannel();
fileLock = fc.lock();
raf.setLength(0L);
fos.flush();
fos.write("TEST".getBytes());
} finally {
if (fileLock != null) fileLock.release();
if (fis != null) fis.close();
if (fos != null) fos.close();
if (raf != null) raf.close();
test1.delete();
}
/*
* Close out in different order to ensure FD is not
* closed out too early
*/
File test2 = new File("test2");
try {
raf = new RandomAccessFile(test2, "rw");
fos = new FileOutputStream(raf.getFD());
fis = new FileInputStream(raf.getFD());
fc = raf.getChannel();
fileLock = fc.lock();
raf.setLength(0L);
fos.flush();
fos.write("TEST".getBytes());
} finally {
if (fileLock != null) fileLock.release();
if (raf != null) raf.close();
if (fos != null) fos.close();
if (fis != null) fis.close();
test2.delete();
}
// one more time, fos first this time
File test3 = new File("test3");
try {
raf = new RandomAccessFile(test3, "rw");
fos = new FileOutputStream(raf.getFD());
fis = new FileInputStream(raf.getFD());
fc = raf.getChannel();
fileLock = fc.lock();
raf.setLength(0L);
fos.flush();
fos.write("TEST".getBytes());
} finally {
if (fileLock != null) fileLock.release();
if (fos != null) fos.close();
if (raf != null) raf.close();
if (fis != null) fis.close();
test3.delete();
}
}
Example 17
| Source File: Sharing.java From jdk8u60 with GNU General Public License v2.0 | 4 votes |
|
/**
* Exercise FileDispatcher close()/preClose()
*/
private static void TestMultipleFD() throws Exception {
RandomAccessFile raf = null;
FileOutputStream fos = null;
FileInputStream fis = null;
FileChannel fc = null;
FileLock fileLock = null;
File test1 = new File("test1");
try {
raf = new RandomAccessFile(test1, "rw");
fos = new FileOutputStream(raf.getFD());
fis = new FileInputStream(raf.getFD());
fc = raf.getChannel();
fileLock = fc.lock();
raf.setLength(0L);
fos.flush();
fos.write("TEST".getBytes());
} finally {
if (fileLock != null) fileLock.release();
if (fis != null) fis.close();
if (fos != null) fos.close();
if (raf != null) raf.close();
test1.delete();
}
/*
* Close out in different order to ensure FD is not
* closed out too early
*/
File test2 = new File("test2");
try {
raf = new RandomAccessFile(test2, "rw");
fos = new FileOutputStream(raf.getFD());
fis = new FileInputStream(raf.getFD());
fc = raf.getChannel();
fileLock = fc.lock();
raf.setLength(0L);
fos.flush();
fos.write("TEST".getBytes());
} finally {
if (fileLock != null) fileLock.release();
if (raf != null) raf.close();
if (fos != null) fos.close();
if (fis != null) fis.close();
test2.delete();
}
// one more time, fos first this time
File test3 = new File("test3");
try {
raf = new RandomAccessFile(test3, "rw");
fos = new FileOutputStream(raf.getFD());
fis = new FileInputStream(raf.getFD());
fc = raf.getChannel();
fileLock = fc.lock();
raf.setLength(0L);
fos.flush();
fos.write("TEST".getBytes());
} finally {
if (fileLock != null) fileLock.release();
if (fos != null) fos.close();
if (raf != null) raf.close();
if (fis != null) fis.close();
test3.delete();
}
}
Example 18
| Source File: Sharing.java From jdk8u-jdk with GNU General Public License v2.0 | 4 votes |
|
/**
* Exercise FileDispatcher close()/preClose()
*/
private static void TestMultipleFD() throws Exception {
RandomAccessFile raf = null;
FileOutputStream fos = null;
FileInputStream fis = null;
FileChannel fc = null;
FileLock fileLock = null;
File test1 = new File("test1");
try {
raf = new RandomAccessFile(test1, "rw");
fos = new FileOutputStream(raf.getFD());
fis = new FileInputStream(raf.getFD());
fc = raf.getChannel();
fileLock = fc.lock();
raf.setLength(0L);
fos.flush();
fos.write("TEST".getBytes());
} finally {
if (fileLock != null) fileLock.release();
if (fis != null) fis.close();
if (fos != null) fos.close();
if (raf != null) raf.close();
test1.delete();
}
/*
* Close out in different order to ensure FD is not
* closed out too early
*/
File test2 = new File("test2");
try {
raf = new RandomAccessFile(test2, "rw");
fos = new FileOutputStream(raf.getFD());
fis = new FileInputStream(raf.getFD());
fc = raf.getChannel();
fileLock = fc.lock();
raf.setLength(0L);
fos.flush();
fos.write("TEST".getBytes());
} finally {
if (fileLock != null) fileLock.release();
if (raf != null) raf.close();
if (fos != null) fos.close();
if (fis != null) fis.close();
test2.delete();
}
// one more time, fos first this time
File test3 = new File("test3");
try {
raf = new RandomAccessFile(test3, "rw");
fos = new FileOutputStream(raf.getFD());
fis = new FileInputStream(raf.getFD());
fc = raf.getChannel();
fileLock = fc.lock();
raf.setLength(0L);
fos.flush();
fos.write("TEST".getBytes());
} finally {
if (fileLock != null) fileLock.release();
if (fos != null) fos.close();
if (raf != null) raf.close();
if (fis != null) fis.close();
test3.delete();
}
}
Example 19
| Source File: Sharing.java From openjdk-jdk8u-backup with GNU General Public License v2.0 | 4 votes |
|
/**
* Exercise FileDispatcher close()/preClose()
*/
private static void TestMultipleFD() throws Exception {
RandomAccessFile raf = null;
FileOutputStream fos = null;
FileInputStream fis = null;
FileChannel fc = null;
FileLock fileLock = null;
File test1 = new File("test1");
try {
raf = new RandomAccessFile(test1, "rw");
fos = new FileOutputStream(raf.getFD());
fis = new FileInputStream(raf.getFD());
fc = raf.getChannel();
fileLock = fc.lock();
raf.setLength(0L);
fos.flush();
fos.write("TEST".getBytes());
} finally {
if (fileLock != null) fileLock.release();
if (fis != null) fis.close();
if (fos != null) fos.close();
if (raf != null) raf.close();
test1.delete();
}
/*
* Close out in different order to ensure FD is not
* closed out too early
*/
File test2 = new File("test2");
try {
raf = new RandomAccessFile(test2, "rw");
fos = new FileOutputStream(raf.getFD());
fis = new FileInputStream(raf.getFD());
fc = raf.getChannel();
fileLock = fc.lock();
raf.setLength(0L);
fos.flush();
fos.write("TEST".getBytes());
} finally {
if (fileLock != null) fileLock.release();
if (raf != null) raf.close();
if (fos != null) fos.close();
if (fis != null) fis.close();
test2.delete();
}
// one more time, fos first this time
File test3 = new File("test3");
try {
raf = new RandomAccessFile(test3, "rw");
fos = new FileOutputStream(raf.getFD());
fis = new FileInputStream(raf.getFD());
fc = raf.getChannel();
fileLock = fc.lock();
raf.setLength(0L);
fos.flush();
fos.write("TEST".getBytes());
} finally {
if (fileLock != null) fileLock.release();
if (fos != null) fos.close();
if (raf != null) raf.close();
if (fis != null) fis.close();
test3.delete();
}
}
Example 20
| Source File: JarClassLoader.java From gemfirexd-oss with Apache License 2.0 | 4 votes |
|
public JarClassLoader(final File file, final String jarName, byte[] jarBytes) throws IOException {
Assert.assertTrue(file != null, "file cannot be null");
Assert.assertTrue(jarName != null, "jarName cannot be null");
FileLock tempLock = null;
try {
@SuppressWarnings("resource")
FileInputStream fileInputStream = new FileInputStream(file);
tempLock = fileInputStream.getChannel().lock(0, file.length(), true);
try {
this.logger = CacheFactory.getAnyInstance().getLogger();
} catch (CacheClosedException ccex) {
// That's okay, logging will just go to stdout/stderr.
}
trace("Acquired shared file lock w/ channel: " + tempLock.channel() + ", for JAR: " + file.getAbsolutePath());
if (file.length() == 0) {
throw new FileNotFoundException("JAR file was truncated prior to obtaining a lock: " + jarName);
}
final byte[] fileContent = getJarContent();
if (!Arrays.equals(fileContent, jarBytes)) {
throw new FileNotFoundException("JAR file: " + file.getAbsolutePath() + ", was modified prior to obtaining a lock: "
+ jarName);
}
if (!isValidJarContent(jarBytes)) {
if (tempLock != null) {
tempLock.release();
tempLock.channel().close();
trace("Prematurely releasing shared file lock due to bad content for JAR file: " + file.getAbsolutePath()
+ ", w/ channel: " + tempLock.channel());
}
throw new IllegalArgumentException("File does not contain valid JAR content: " + file.getAbsolutePath());
}
Assert.assertTrue(jarBytes != null, "jarBytes cannot be null");
// Temporarily save the contents of the JAR file until they can be processed by the
// loadClassesandRegisterFunctions() method.
this.jarByteContent = jarBytes;
if (messageDigest != null) {
this.md5hash = messageDigest.digest(this.jarByteContent);
} else {
this.md5hash = null;
}
this.file = file;
this.jarName = jarName;
this.fileLock = tempLock;
} catch (FileNotFoundException fnfex) {
if (tempLock != null) {
tempLock.release();
tempLock.channel().close();
trace("Prematurely releasing shared file lock due to file not found for JAR file: " + file.getAbsolutePath()
+ ", w/ channel: " + tempLock.channel());
}
throw fnfex;
}
}
