Examples with LockException org.exist.util.LockException used on opensource projects

Example 1 with LockException

use of org.exist.util.LockException in project exist by eXist-db.

the class MutableCollection method storeDocument.

@Override
public void storeDocument(final Txn transaction, final DBBroker broker, final XmldbURI name, final InputSource source, @Nullable MimeType mimeType, @Nullable final Date createdDate, @Nullable final Date lastModifiedDate, @Nullable final Permission permission, @Nullable final DocumentType documentType, @Nullable final XMLReader xmlReader) throws EXistException, PermissionDeniedException, SAXException, LockException, IOException {
    if (mimeType == null) {
        mimeType = MimeType.BINARY_TYPE;
    }
    if (mimeType.isXMLType()) {
        // Store XML Document
        final BiConsumer2E<XMLReader, IndexInfo, SAXException, EXistException> validatorFn = (xmlReader1, validateIndexInfo) -> {
            validateIndexInfo.setReader(xmlReader1, null);
            try {
                xmlReader1.parse(source);
            } catch (final SAXException e) {
                throw new SAXException("The XML parser reported a problem: " + e.getMessage(), e);
            } catch (final IOException e) {
                throw new EXistException(e);
            }
        };
        final BiConsumer2E<XMLReader, IndexInfo, SAXException, EXistException> parserFn = (xmlReader1, storeIndexInfo) -> {
            try {
                storeIndexInfo.setReader(xmlReader1, null);
                xmlReader1.parse(source);
            } catch (final IOException e) {
                throw new EXistException(e);
            }
        };
        storeXmlDocument(transaction, broker, name, mimeType, createdDate, lastModifiedDate, permission, documentType, xmlReader, validatorFn, parserFn);
    } else {
        // Store Binary Document
        try (final InputStream is = source.getByteStream()) {
            if (is == null) {
                throw new IOException("storeDocument received a null InputStream when trying to store a Binary Document");
            }
            addBinaryResource(transaction, broker, name, is, mimeType.getName(), -1, createdDate, lastModifiedDate, permission);
        }
    }
}

Example 2 with LockException

use of org.exist.util.LockException in project exist by eXist-db.

the class MutableCollection method setPath.

@Override
public final void setPath(XmldbURI path, final boolean updateChildren) {
    path = path.toCollectionPathURI();
    // TODO : see if the URI resolves against DBBroker.TEMP_COLLECTION
    this.isTempCollection = path.getRawCollectionPath().equals(XmldbURI.TEMP_COLLECTION);
    this.path = path;
    if (updateChildren) {
        for (final Map.Entry<String, DocumentImpl> docEntry : documents.entrySet()) {
            final XmldbURI docUri = path.append(docEntry.getKey());
            try (final ManagedDocumentLock documentLock = lockManager.acquireDocumentWriteLock(docUri)) {
                final DocumentImpl doc = docEntry.getValue();
                // this will invalidate the cached `uri` in DocumentImpl
                doc.setCollection(this);
            } catch (final LockException e) {
                LOG.error(e.getMessage(), e);
                throw new IllegalStateException(e);
            }
        }
    }
}

Example 3 with LockException

use of org.exist.util.LockException in project exist by eXist-db.

the class Configurator method save.

public static DocumentImpl save(final Configurable instance, final DBBroker broker, final Collection collection, final XmldbURI uri) throws IOException, ConfigurationException {
    final StringWriter writer = new StringWriter();
    final SAXSerializer serializer = new SAXSerializer(writer, null);
    try {
        serializer.startDocument();
        serialize(instance, serializer);
        serializer.endDocument();
    } catch (final SAXException saxe) {
        throw new ConfigurationException(saxe.getMessage(), saxe);
    }
    final String data = writer.toString();
    if (data == null || data.length() == 0) {
        return null;
    }
    FullXmldbURI fullURI = null;
    final BrokerPool pool = broker.getBrokerPool();
    final TransactionManager transact = pool.getTransactionManager();
    LOG.info("Storing configuration {}/{}", collection.getURI(), uri);
    final SecurityManager securityManager = pool.getSecurityManager();
    try {
        final Subject systemSubject = securityManager.getSystemSubject();
        broker.pushSubject(systemSubject);
        Txn txn = broker.getCurrentTransaction();
        final boolean txnInProgress = txn != null;
        if (!txnInProgress) {
            txn = transact.beginTransaction();
        }
        try {
            txn.acquireCollectionLock(() -> pool.getLockManager().acquireCollectionWriteLock(collection.getURI()));
            fullURI = getFullURI(pool, collection.getURI().append(uri));
            saving.add(fullURI);
            final Permission systemResourcePermission = PermissionFactory.getDefaultResourcePermission(pool.getSecurityManager());
            systemResourcePermission.setOwner(systemSubject);
            systemResourcePermission.setGroup(systemSubject.getDefaultGroup());
            systemResourcePermission.setMode(Permission.DEFAULT_SYSTEM_RESOURCE_PERM);
            broker.storeDocument(txn, uri, new StringInputSource(data), MimeType.XML_TYPE, null, null, systemResourcePermission, null, null, collection);
            broker.saveCollection(txn, collection);
            if (!txnInProgress) {
                transact.commit(txn);
            }
        } catch (final EXistException | PermissionDeniedException | SAXException | LockException e) {
            if (!txnInProgress) {
                transact.abort(txn);
            }
            throw e;
        } finally {
            if (!txnInProgress) {
                txn.close();
            }
        }
        saving.remove(fullURI);
        broker.flush();
        broker.sync(Sync.MAJOR);
        return collection.getDocument(broker, uri.lastSegment());
    } catch (final EXistException | PermissionDeniedException | SAXException | LockException e) {
        LOG.error(e);
        if (fullURI != null) {
            saving.remove(fullURI);
        }
        throw new IOException(e);
    } finally {
        broker.popSubject();
    }
}

Example 4 with LockException

use of org.exist.util.LockException in project exist by eXist-db.

the class NodeIterator method next.

/**
 *  Returns the next node in document order.
 */
@Override
public IStoredNode next() {
    try (final ManagedLock<ReentrantLock> domFileLock = lockManager.acquireBtreeReadLock(db.getLockName())) {
        db.setOwnerObject(broker);
        IStoredNode nextNode = null;
        if (gotoNextPosition()) {
            long backLink = 0;
            do {
                final DOMFile.DOMFilePageHeader pageHeader = page.getPageHeader();
                // Next value larger than length of the current page?
                if (offset >= pageHeader.getDataLength()) {
                    // Load next page in chain
                    long nextPageNum = pageHeader.getNextDataPage();
                    if (nextPageNum == Page.NO_PAGE) {
                        SanityCheck.TRACE("bad link to next " + page.page.getPageInfo() + "; previous: " + pageHeader.getPreviousDataPage() + "; offset = " + offset + "; lastTupleID = " + lastTupleID);
                        if (LOG.isDebugEnabled()) {
                            LOG.debug(db.debugPageContents(page));
                        }
                        // TODO : throw exception here ? -pb
                        return null;
                    }
                    pageNum = nextPageNum;
                    page = db.getDOMPage(nextPageNum);
                    db.addToBuffer(page);
                    offset = 0;
                }
                // Extract the tuple ID
                lastTupleID = ByteConversion.byteToShort(page.data, offset);
                offset += DOMFile.LENGTH_TID;
                // Check if this is just a link to a relocated node
                if (ItemId.isLink(lastTupleID)) {
                    // Skip this
                    offset += DOMFile.LENGTH_FORWARD_LOCATION;
                    // Continue the iteration
                    continue;
                }
                // Read data length
                short vlen = ByteConversion.byteToShort(page.data, offset);
                offset += DOMFile.LENGTH_DATA_LENGTH;
                if (vlen < 0) {
                    LOG.error("Got negative length{} at offset {}!!!", vlen, offset);
                    if (LOG.isDebugEnabled()) {
                        LOG.debug(db.debugPageContents(page));
                    }
                // TODO : throw an exception right now ?
                }
                if (ItemId.isRelocated(lastTupleID)) {
                    // Found a relocated node. Read the original address
                    backLink = ByteConversion.byteToLong(page.data, offset);
                    offset += DOMFile.LENGTH_ORIGINAL_LOCATION;
                }
                // Overflow page? Load the overflow value
                if (vlen == DOMFile.OVERFLOW) {
                    vlen = DOMFile.LENGTH_OVERFLOW_LOCATION;
                    final long overflow = ByteConversion.byteToLong(page.data, offset);
                    offset += DOMFile.LENGTH_OVERFLOW_LOCATION;
                    try {
                        final byte[] overflowValue = db.getOverflowValue(overflow);
                        nextNode = StoredNode.deserialize(overflowValue, 0, overflowValue.length, doc, useNodePool);
                    } catch (final Exception e) {
                        LOG.warn("Exception while loading overflow value: {}; originating page: {}", e.getMessage(), page.page.getPageInfo());
                    // TODO : rethrow exception ? -pb
                    }
                // Normal node
                } else {
                    try {
                        nextNode = StoredNode.deserialize(page.data, offset, vlen, doc, useNodePool);
                        offset += vlen;
                    } catch (final Exception e) {
                        LOG.error("Error while deserializing node: {}", e.getMessage(), e);
                        LOG.error("Reading from offset: {}; len = {}", offset, vlen);
                        if (LOG.isDebugEnabled()) {
                            LOG.debug(db.debugPageContents(page));
                        }
                        throw new RuntimeException(e);
                    }
                }
                if (nextNode == null) {
                    LOG.error("illegal node on page {}; tid = {}; next = {}; prev = {}; offset = {}; len = {}", page.getPageNum(), ItemId.getId(lastTupleID), page.getPageHeader().getNextDataPage(), page.getPageHeader().getPreviousDataPage(), offset - vlen, page.getPageHeader().getDataLength());
                    if (LOG.isDebugEnabled()) {
                        LOG.debug(db.debugPageContents(page));
                    }
                    // TODO : throw an exception here ? -pb
                    return null;
                }
                if (ItemId.isRelocated(lastTupleID)) {
                    nextNode.setInternalAddress(backLink);
                } else {
                    nextNode.setInternalAddress(StorageAddress.createPointer((int) pageNum, ItemId.getId(lastTupleID)));
                }
                nextNode.setOwnerDocument(doc);
            } while (nextNode == null);
        }
        return nextNode;
    } catch (final LockException e) {
        LOG.warn("Failed to acquire read lock on {}", FileUtils.fileName(db.getFile()));
        // TODO : throw exception here ? -pb
        return null;
    } catch (final BTreeException | IOException e) {
        LOG.error(e.getMessage(), e);
    // TODO : re-throw exception ? -pb
    }
    return null;
}

Example 5 with LockException

use of org.exist.util.LockException in project exist by eXist-db.

the class RawNodeIterator method next.

@Override
public Value next() {
    Value nextValue = null;
    try (final ManagedLock<ReentrantLock> domFileLock = lockManager.acquireBtreeReadLock(db.getLockName())) {
        db.setOwnerObject(broker);
        long backLink = 0;
        do {
            final DOMFile.DOMFilePageHeader pageHeader = page.getPageHeader();
            // Next value larger than length of the current page?
            if (offset >= pageHeader.getDataLength()) {
                // Load next page in chain
                long nextPage = pageHeader.getNextDataPage();
                if (nextPage == Paged.Page.NO_PAGE) {
                    SanityCheck.TRACE("Bad link to next page " + page.page.getPageInfo() + "; previous: " + pageHeader.getPreviousDataPage() + "; offset = " + offset + "; lastTupleID = " + lastTupleID);
                    // TODO : throw exception here ? -pb
                    return null;
                }
                pageNum = nextPage;
                page = db.getDOMPage(nextPage);
                db.addToBuffer(page);
                offset = 0;
            }
            // Extract the tuple id
            lastTupleID = ByteConversion.byteToShort(page.data, offset);
            offset += DOMFile.LENGTH_TID;
            // Check if this is just a link to a relocated node
            if (ItemId.isLink(lastTupleID)) {
                // Skip this
                offset += DOMFile.LENGTH_FORWARD_LOCATION;
                continue;
            }
            // Read data length
            short valueLength = ByteConversion.byteToShort(page.data, offset);
            offset += DOMFile.LENGTH_DATA_LENGTH;
            if (valueLength < 0) {
                LOG.error("Got negative length{} at offset {}!!!", valueLength, offset);
                LOG.debug(db.debugPageContents(page));
            // TODO : throw an exception right now ?
            }
            if (ItemId.isRelocated(lastTupleID)) {
                // found a relocated node. Read the original address
                backLink = ByteConversion.byteToLong(page.data, offset);
                offset += DOMFile.LENGTH_ORIGINAL_LOCATION;
            }
            // Overflow page? load the overflow value
            if (valueLength == DOMFile.OVERFLOW) {
                valueLength = DOMFile.LENGTH_OVERFLOW_LOCATION;
                final long overflow = ByteConversion.byteToLong(page.data, offset);
                offset += DOMFile.LENGTH_OVERFLOW_LOCATION;
                try {
                    final byte[] odata = db.getOverflowValue(overflow);
                    nextValue = new Value(odata);
                } catch (final Exception e) {
                    LOG.error("Exception while loading overflow value: {}; originating page: {}", e.getMessage(), page.page.getPageInfo());
                }
            // normal node
            } else {
                try {
                    nextValue = new Value(page.data, offset, valueLength);
                    offset += valueLength;
                } catch (final Exception e) {
                    LOG.error("Error while deserializing node: {}", e.getMessage(), e);
                    LOG.error("Reading from offset: {}; len = {}", offset, valueLength);
                    LOG.debug(db.debugPageContents(page));
                    throw new RuntimeException(e);
                }
            }
            if (nextValue == null) {
                LOG.error("illegal node on page {}; tupleID = {}; next = {}; prev = {}; offset = {}; len = {}", page.getPageNum(), ItemId.getId(lastTupleID), page.getPageHeader().getNextDataPage(), page.getPageHeader().getPreviousDataPage(), offset - valueLength, page.getPageHeader().getDataLength());
                // TODO : throw exception here ? -pb
                return null;
            }
            if (ItemId.isRelocated(lastTupleID)) {
                nextValue.setAddress(backLink);
            } else {
                nextValue.setAddress(StorageAddress.createPointer((int) pageNum, ItemId.getId(lastTupleID)));
            }
        } while (nextValue == null);
        return nextValue;
    } catch (final LockException e) {
        LOG.error("Failed to acquire read lock on {}", FileUtils.fileName(db.getFile()));
        // TODO : throw exception here ? -pb
        return null;
    }
}