Examples of org.apache.lucene.store.Lock

org.apache.lucene.store.Lock

An interprocess mutex lock.

Typical use might look like:

 new Lock.With(directory.makeLock("my.lock")) { public Object doBody() { ... code to execute while locked ... } }.run();

@see Directory#makeLock(String)

     * @param name the name of the lock file.
     * @return a Lock object with the given name.
     */
    public Lock makeLock(String name) {
        final File lockFile = new File(directory, name);
        return new Lock() {
            public boolean obtain() throws IOException {
                if (DISABLE_LOCKS) {
                    return true;
                }
                return lockFile.createNewFile();

View Full Code Here

  }


  @Override
  public Lock makeLock(String lockName) {
    final Path lockPath = new Path(_dir, lockName);
    return new Lock() {
      private boolean _set;


      @Override
      public boolean obtain() throws IOException {
        if (_set) {

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  private List<Lock> acquireWriteLocks(Directory... dirs) throws IOException {
    List<Lock> locks = new ArrayList<>();
    for(int i=0;i<dirs.length;i++) {
      boolean success = false;
      try {
        Lock lock = dirs[i].makeLock(WRITE_LOCK_NAME);
        locks.add(lock);
        lock.obtain(config.getWriteLockTimeout());
        success = true;
      } finally {
        if (success == false) {
          // Release all previously acquired locks:
          IOUtils.closeWhileHandlingException(locks);

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    if (create) {
      // Clear the write lock in case it's leftover:
      directory.clearLock(IndexWriter.WRITE_LOCK_NAME);
    }


    Lock writeLock = directory.makeLock(IndexWriter.WRITE_LOCK_NAME);
    if (!writeLock.obtain(writeLockTimeout)) // obtain write lock
      throw new LockObtainFailedException("Index locked for write: " + writeLock);
    this.writeLock = writeLock;                   // save it


    try {
      if (create) {

View Full Code Here

    return new FileSystemIndexInput(new Path(directory, name), ioFileBufferSize);
  }


  @Override
  public Lock makeLock(final String name) {
    return new Lock() {
      public boolean obtain() {
        return true;
      }


      public void release() {

View Full Code Here

     * @param name the name of the lock file.
     * @return a Lock object with the given name.
     */
    public Lock makeLock(String name) {
        final File lockFile = new File(directory, name);
        return new Lock() {
            public boolean obtain() throws IOException {
                if (DISABLE_LOCKS) {
                    return true;
                }
                return lockFile.createNewFile();

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    ensureOpen();
    if (stale)
      throw new StaleReaderException("IndexReader out of date and no longer valid for delete, undelete, or setNorm operations");


    if (writeLock == null) {
      Lock writeLock = directory.makeLock(IndexWriter.WRITE_LOCK_NAME);
      if (!writeLock.obtain(IndexWriter.WRITE_LOCK_TIMEOUT)) // obtain write lock
        throw new LockObtainFailedException("Index locked for write: " + writeLock);
      this.writeLock = writeLock;


      // we have to check whether index has changed since this reader was opened.
      // if so, this reader is no longer valid for deletion

View Full Code Here

    if (create) {
      // Clear the write lock in case it's leftover:
      directory.clearLock(IndexWriter.WRITE_LOCK_NAME);
    }


    Lock writeLock = directory.makeLock(IndexWriter.WRITE_LOCK_NAME);
    if (!writeLock.obtain(writeLockTimeout)) // obtain write lock
      throw new LockObtainFailedException("Index locked for write: " + writeLock);
    this.writeLock = writeLock;                   // save it


    try {
      if (create) {

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    if (create) {
      // Clear the write lock in case it's leftover:
      directory.clearLock(IndexWriter.WRITE_LOCK_NAME);
    }


    Lock writeLock = directory.makeLock(IndexWriter.WRITE_LOCK_NAME);
    if (!writeLock.obtain(writeLockTimeout)) // obtain write lock
      throw new LockObtainFailedException("Index locked for write: " + writeLock);
    this.writeLock = writeLock;                   // save it


    try {
      if (create) {

View Full Code Here

   * @return version number.
   * @throws IOException if segments file cannot be read.
   */
  public static long getCurrentVersion(Directory directory) throws IOException {
    synchronized (directory) {                 // in- & inter-process sync
      Lock commitLock=directory.makeLock(IndexWriter.COMMIT_LOCK_NAME);
      
      boolean locked=false;
      
      try {
         locked=commitLock.obtain(IndexWriter.COMMIT_LOCK_TIMEOUT);
         
         return SegmentInfos.readCurrentVersion(directory);
      } finally {
        if (locked) {
          commitLock.release();
        }
      }
    }
  }

View Full Code Here

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