Examples of org.apache.lucene.store.Lock.obtain()

org.apache.lucene.store.Lock.obtain()
Attempts to obtain exclusive access and immediately return upon success or failure. @return true iff exclusive access is obtained

      directory.clearLock(WRITE_LOCK_NAME);
    }


    Lock writeLock = directory.makeLock(WRITE_LOCK_NAME);


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


    boolean success = false;

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    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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       throws IOException {
    directory = d;
    analyzer = a;


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


    synchronized (directory) {        // in- & inter-process sync
      new Lock.With(directory.makeLock(IndexWriter.COMMIT_LOCK_NAME), COMMIT_LOCK_TIMEOUT) {

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    if(stale)
      throw new IOException("IndexReader out of date and no longer valid for deletion");
      
    if (writeLock == null) {
      Lock writeLock = directory.makeLock(IndexWriter.WRITE_LOCK_NAME);
      if (!writeLock.obtain(IndexWriter.WRITE_LOCK_TIMEOUT)) // obtain write lock
        throw new IOException("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      // if so, this reader is no longer valid for deletion

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      directory.clearLock(WRITE_LOCK_NAME);
    }


    Lock writeLock = directory.makeLock(WRITE_LOCK_NAME);


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


    boolean success = false;

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      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

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        ByteBufferDirectory dir = new ByteBufferDirectory(cache);


        Lock lock = dir.makeLock("testlock");


        assertThat(lock.isLocked(), equalTo(false));
        assertThat(lock.obtain(200), equalTo(true));
        assertThat(lock.isLocked(), equalTo(true));
        try {
            assertThat(lock.obtain(200), equalTo(false));
            assertThat("lock should be thrown", false, equalTo(true));
        } catch (LockObtainFailedException e) {

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        assertThat(lock.isLocked(), equalTo(false));
        assertThat(lock.obtain(200), equalTo(true));
        assertThat(lock.isLocked(), equalTo(true));
        try {
            assertThat(lock.obtain(200), equalTo(false));
            assertThat("lock should be thrown", false, equalTo(true));
        } catch (LockObtainFailedException e) {
            // all is well
        }
        lock.release();

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        }
        AbstractFsBlobContainer fsBlobContainer = (AbstractFsBlobContainer) blobContainer;
        NativeFSLockFactory lockFactory = new NativeFSLockFactory(fsBlobContainer.filePath());


        Lock lock = lockFactory.makeLock("snapshot.lock");
        boolean obtained = lock.obtain();
        if (!obtained) {
            throw new ElasticSearchIllegalStateException("failed to obtain snapshot lock [" + lock + "]");
        }
        return new FsSnapshotLock(lock);
    }

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            }
            logger.trace("obtaining node lock on {} ...", dir.getAbsolutePath());
            try {
                NativeFSLockFactory lockFactory = new NativeFSLockFactory(dir);
                Lock tmpLock = lockFactory.makeLock("node.lock");
                boolean obtained = tmpLock.obtain();
                if (obtained) {
                    lock = tmpLock;
                    localNodeId = i;
                    break;
                } else {

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