Examples of org.exist.storage.btree.IndexQuery

org.exist.storage.btree.IndexQuery
IndexQuery represents the most primitive form of index querying. Instances of this object should be created by QueryResolvers and cached in Query instances.


        // for each document id range, scan the index to find matches
        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);

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                    toKey = computeKey(type, qname, doc.getDocId() + 1);
                } else {
                    fromKey = computeKey(type, qname, doc.getDocId(), ancestorId);
                    toKey = computeKey(type, qname, doc.getDocId(), ancestorId.nextSibling());
                }
                final IndexQuery query = new IndexQuery(IndexQuery.RANGE, new Value(fromKey), new Value(toKey));
                try {
                    index.btree.query(query, callback);
                } catch (final Exception e) {
                    NativeStructuralIndex.LOG.error("Error while searching structural index: " + e.getMessage(), e);
                }

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                          toKey = computeKey(type, qname, doc.getDocId() + 1);
                      } else {
                          fromKey = computeKey(type, qname, doc.getDocId(), ancestorId);
                          toKey = computeKey(type, qname, doc.getDocId(), ancestorId.nextSibling());
                      }
                      final IndexQuery query = new IndexQuery(IndexQuery.RANGE, new Value(fromKey), new Value(toKey));
                      try {
                          index.btree.query(query, callback);
                      } catch (final Exception e) {
                          NativeStructuralIndex.LOG.error("Error while searching structural index: " + e.getMessage(), e);
                      }

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            {return;}
        final List<QName> qnames = getQNamesForDoc(docToRemove);
        for (final QName qname : qnames) {
            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) {

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    }


    protected void removeQNamesForDoc(DocumentImpl doc) {
        final byte[] fromKey = computeDocKey(doc.getDocId());
        final byte[] toKey = computeDocKey(doc.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) {

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        final List<QName> qnames = new ArrayList<QName>();
        if (index.btree == null)
            {return qnames;}
        final byte[] fromKey = computeDocKey(doc.getDocId());
        final byte[] toKey = computeDocKey(doc.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.query(query, new BTreeCallback() {
                public boolean indexInfo(Value value, long pointer) throws TerminatedException {

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                } else {
                    name = qname.getLocalName();
                }
                final byte[] fromKey = computeKey(qname.getNameType(), qname, doc.getDocId());
                final byte[] toKey = computeKey(qname.getNameType(), qname, doc.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.READ_LOCK);
                    index.btree.query(query, new BTreeCallback() {

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        final Lock lock = dbTokens.getLock();
        try {
            lock.acquire(Lock.WRITE_LOCK);
            // remove generic index
            Value value = new WordRef(collection.getId());
            dbTokens.removeAll(null, new IndexQuery(IndexQuery.TRUNC_RIGHT, value));
            // remove QName index
            value = new QNameWordRef(collection.getId());
            dbTokens.removeAll(null, new IndexQuery(IndexQuery.TRUNC_RIGHT, value));
        } catch (final LockException e) {
            LOG.warn("Failed to acquire lock for '" + dbTokens.getFile().getName() + "'", e);
            //TODO : throw exception ? -pb
        } catch (final BTreeException e) {
            LOG.error(e.getMessage(), e);

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                    value = new WordRef(collectionId);
                } else {
                    value = new QNameWordRef(collectionId, qname, broker.getBrokerPool().getSymbols());
                }
            }
            final IndexQuery query = new IndexQuery(IndexQuery.TRUNC_RIGHT, value);
            try {
                lock.acquire(Lock.READ_LOCK);
                dbTokens.query(query, cb);
            } catch (final LockException e) {
                LOG.warn("Failed to acquire lock for '" + dbTokens.getFile().getName() + "'", e);

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        final Lock lock = dbTokens.getLock();
        for (final Iterator<Collection> iter = docs.getCollectionIterator(); iter.hasNext();) {
            final int collectionId = ((Collection) iter.next()).getId();
            //Compute a key for the token
            final Value value = new WordRef(collectionId);
            final IndexQuery query = new IndexQuery(IndexQuery.TRUNC_RIGHT, value);
            try {
                lock.acquire(Lock.READ_LOCK);
                dbTokens.query(query, cb);
            } catch (final LockException e) {
                LOG.warn("Failed to acquire lock for '" + dbTokens.getFile().getName() + "'", e);

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Related Classes of org.exist.storage.btree.IndexQuery

org.exist.indexing.ngram.NGramIndexWorker

org.exist.indexing.sort.SortIndexWorker

org.exist.storage.BTreeRecoverTest

org.exist.storage.DOMFileRecoverTest

org.exist.storage.index.BFile

org.exist.storage.NativeTextEngine

org.exist.storage.NativeValueIndex

org.exist.storage.structural.NativeStructuralIndexWorker

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