Package org.exist.storage.lock

Examples of org.exist.storage.lock.Lock.acquire()

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     */
    public long getIndex(String name, NodeProxy proxy) throws EXistException, LockException {
        short id = getId(name);
        final Lock lock = index.btree.getLock();
        try {
            lock.acquire(Lock.READ_LOCK);
            byte[] key = computeKey(id, proxy);
            return index.btree.findValue(new Value(key));
        } catch (LockException e) {
            throw new EXistException("Exception caught while reading sort index: " + e.getMessage(), e);
        } catch (BTreeException e) {
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  protected final StoredNode[] selectAndLock(Txn transaction)
      throws LockException, PermissionDeniedException, EXistException,
      XPathException, TriggerException {
      final Lock globalLock = broker.getBrokerPool().getGlobalUpdateLock();
      try {
          globalLock.acquire(Lock.READ_LOCK);
         
          final NodeList nl = select(docs);
          lockedDocuments = ((NodeSet)nl).getDocumentSet();
         
        // acquire a lock on all documents
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            ByteArray data = os.data();
            if (data.size() == 0)
                continue;
            Lock lock = index.db.getLock();
            try {
                lock.acquire(Lock.WRITE_LOCK);

                NGramQNameKey value = new NGramQNameKey(currentDoc.getCollection().getId(), key.qname,
                        index.getBrokerPool().getSymbols(), key.term);
                index.db.append(value, data);
            } catch (LockException e) {
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            occurencesList.sort();
            os.clear();

            Lock lock = index.db.getLock();
            try {
                lock.acquire(Lock.WRITE_LOCK);

                NGramQNameKey value = new NGramQNameKey(currentDoc.getCollection().getId(), key.qname,
                        index.getBrokerPool().getSymbols(), key.term);
                boolean changed = false;
                os.clear();
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    public void removeCollection(Collection collection, DBBroker broker, boolean reindex) {
        if (LOG.isDebugEnabled())
            LOG.debug("Dropping NGram index for collection " + collection.getURI());
        final Lock lock = index.db.getLock();
        try {
            lock.acquire(Lock.WRITE_LOCK);
            // remove generic index
            Value value = new NGramQNameKey(collection.getId());
            index.db.removeAll(null, new IndexQuery(IndexQuery.TRUNC_RIGHT, value));
        } catch (LockException e) {
            LOG.warn("Failed to acquire lock for '" + index.db.getFile().getName() + "'", e);
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            for (int i = 0; i < qnames.size(); i++) {
                QName qname = qnames.get(i);
                NGramQNameKey key = new NGramQNameKey(collectionId, qname, index.getBrokerPool().getSymbols(), query);
                final Lock lock = index.db.getLock();
                try {
                    lock.acquire(Lock.READ_LOCK);
                    SearchCallback cb = new SearchCallback(contextId, query, ngram, docs, contextSet, context, result, axis == NodeSet.ANCESTOR);
                    int op = query.codePointCount(0, query.length()) < getN() ? IndexQuery.TRUNC_RIGHT : IndexQuery.EQ;
                    index.db.query(new IndexQuery(op, key), cb);
                } catch (LockException e) {
                    LOG.warn("Failed to acquire lock for '" + index.db.getFile().getName() + "'", e);
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                    Value endRef = new NGramQNameKey(collectionId, qnames.get(q),
                        index.getBrokerPool().getSymbols(), end.toString().toLowerCase());
                    query = new IndexQuery(IndexQuery.BW, startRef, endRef);
                }
                try {
                    lock.acquire(Lock.READ_LOCK);
                    index.db.query(query, cb);
                } catch (LockException e) {
                    LOG.warn("Failed to acquire lock for '" + index.db.getFile().getName() + "'", e);
                } catch (IOException e) {
                    LOG.error(e.getMessage(), e);
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        Lock dlock;
        for (int idx = 0; idx < partCount; idx++) {
            d = parts[idx].getDocument();
            dlock = d.getUpdateLock();
            if (exclusive)
                {dlock.acquire(Lock.WRITE_LOCK);}
            else
                {dlock.acquire(Lock.READ_LOCK);}
        }
    }
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            d = parts[idx].getDocument();
            dlock = d.getUpdateLock();
            if (exclusive)
                {dlock.acquire(Lock.WRITE_LOCK);}
            else
                {dlock.acquire(Lock.READ_LOCK);}
        }
    }

    public void unlock(boolean exclusive) {
        DocumentImpl d;
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     * @throws IOException
     */
    public void seek(NodeHandle node) throws IOException {
        final Lock lock = db.getLock();
        try {
            lock.acquire(Lock.READ_LOCK);
            RecordPos rec = null;
            if (StorageAddress.hasAddress(node.getInternalAddress()))
                {rec = db.findRecord(node.getInternalAddress());}
            if (rec == null) {
                try {
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