Package org.exist.storage.lock

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

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                        key = new WordRef(collectionId, token.toString());
                    }
                    final OccurrenceList newOccurencesList = new OccurrenceList();
                    os.clear();
                    try {
                        lock.acquire(Lock.WRITE_LOCK);
                        final Value value = dbTokens.get(key);
                        if (value == null)
                            {continue;}
                        //Add its data to the new list
                        final VariableByteArrayInput is = new VariableByteArrayInput(value.getData());
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            doc = i.next();
            dlock = doc.getUpdateLock();
            boolean lockAcquired = false;
            try {
                if (!context.inProtectedMode() && !dlock.hasLock()) {
                    dlock.acquire(Lock.READ_LOCK);
                    lockAcquired = true;
                }
                result.add(new NodeProxy(doc)); // , -1, Node.DOCUMENT_NODE));
            } catch (final LockException e) {
                throw new XPathException(e.getMessage());
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     */
    public boolean hasNext() {
        final Lock lock = db.getLock();
        try {
            try {
                lock.acquire(Lock.READ_LOCK);
            } catch (final LockException e) {
                LOG.warn("Failed to acquire read lock on " + db.getFile().getName());
                //TODO : throw exception here ? -pb
                return false;
            }
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     */
    public StoredNode next() {
        final Lock lock = db.getLock();
        try {
            try {
                lock.acquire(Lock.READ_LOCK);
            } catch (final LockException e) {
                LOG.warn("Failed to acquire read lock on " + db.getFile().getName());
                //TODO : throw exception here ? -pb
                return null;
            }
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        for (final Range range : ranges) {
            final byte[] fromKey = computeKey(type, qname, range.start);
            final byte[] toKey = computeKey(type, qname, range.end + 1);
            final IndexQuery query = new IndexQuery(IndexQuery.RANGE, new Value(fromKey), new Value(toKey));
            try {
                lock.acquire(Lock.READ_LOCK);
                index.btree.query(query, callback);
            } catch (final LockException e) {
                NativeStructuralIndex.LOG.warn("Lock problem while searching structural index: " + e.getMessage(), e);
            } catch (final TerminatedException e) {
                NativeStructuralIndex.LOG.warn("Query was terminated while searching structural index: " + e.getMessage(), e);
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    public NodeSet findDescendantsByTagName(byte type, QName qname, int axis, DocumentSet docs, NodeSet contextSet, int contextId, Expression parent) {
        final Lock lock = index.btree.getLock();
        final NewArrayNodeSet result = new NewArrayNodeSet(docs.getDocumentCount(), 256);
        final FindDescendantsCallback callback = new FindDescendantsCallback(type, axis, contextId, result, parent);
        try {
            lock.acquire(Lock.READ_LOCK);
            for (final NodeProxy ancestor : contextSet) {
                final DocumentImpl doc = ancestor.getDocument();
                final NodeId ancestorId = ancestor.getNodeId();
                callback.setAncestor(doc, ancestor);
                byte[] fromKey, toKey;
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    public NodeSet findAncestorsByTagName(byte type, QName qname, int axis, DocumentSet docs, NodeSet contextSet,
                                          int contextId) {
        final Lock lock = index.btree.getLock();
        final NewArrayNodeSet result = new NewArrayNodeSet(docs.getDocumentCount(), 256);
        try {
            lock.acquire(Lock.READ_LOCK);
            for (final NodeProxy descendant : contextSet) {
                NodeId parentId;
                if (axis == Constants.ANCESTOR_SELF_AXIS || axis == Constants.SELF_AXIS)
                    {parentId = descendant.getNodeId();}
                else
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        for (final NodeProxy ancestor : contextSet) {
            final DocumentImpl doc = ancestor.getDocument();
            final NodeId ancestorId = ancestor.getNodeId();
            final List<QName> qnames = getQNamesForDoc(doc);
            try {
              lock.acquire(Lock.READ_LOCK);
              for (final QName qname : qnames) {
                if (test.getName() == null || test.matches(qname)) {
                  callback.setAncestor(doc, ancestor);
                  byte[] fromKey, toKey;
                      if (ancestorId == NodeId.DOCUMENT_NODE) {
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        try {
            final Lock lock = index.btree.getLock();
            for (final Map.Entry<QName,List<NodeProxy>> entry: pending.entrySet()) {
                final QName qname = entry.getKey();
                try {
                    lock.acquire(Lock.WRITE_LOCK);
                    final List<NodeProxy> nodes = entry.getValue();
                    for (final NodeProxy proxy : nodes) {
                        final NodeId nodeId = proxy.getNodeId();
                        final byte[] key = computeKey(qname.getNameType(), qname, document.getDocId(), nodeId);
                        index.btree.removeValue(new Value(key));
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            final byte[] fromKey = computeKey(qname.getNameType(), qname, docToRemove.getDocId());
            final byte[] toKey = computeKey(qname.getNameType(), qname, docToRemove.getDocId() + 1);
            final IndexQuery query = new IndexQuery(IndexQuery.RANGE, new Value(fromKey), new Value(toKey));
            final Lock lock = index.btree.getLock();
            try {
                lock.acquire(Lock.WRITE_LOCK);
                index.btree.remove(query, null);
            } catch (final LockException e) {
                NativeStructuralIndex.LOG.warn("Failed to lock structural index: " + e.getMessage(), e);
            } catch (final Exception e) {
                NativeStructuralIndex.LOG.warn("Exception caught while removing structural index for document " +
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