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; } }