package org.exist.storage.index;

import org.exist.storage.BrokerPool;
import org.exist.storage.DefaultCacheManager;
import org.exist.storage.btree.BTree;
import org.exist.storage.btree.DBException;
import org.exist.storage.lock.Lock;
import org.exist.storage.lock.MultiReadReentrantLock;
import org.exist.util.FileUtils;

import java.nio.file.Path;

public class BTreeStore extends BTree {

    public final static short FILE_FORMAT_VERSION_ID = 2;

    protected Lock lock = null;

    public BTreeStore(BrokerPool pool, byte fileId, boolean transactional, final Path file, DefaultCacheManager cacheManager) throws DBException {
        super(pool, fileId, transactional, cacheManager, file);
        lock = new MultiReadReentrantLock(FileUtils.fileName(file));

        if(exists()) {
            open(FILE_FORMAT_VERSION_ID);
        } else {
            if (LOG.isDebugEnabled()) {
                LOG.debug("Creating data file: " + FileUtils.fileName(getFile()));
            }
            create((short)-1);
        }
        setSplitFactor(0.7);
    }

    @Override
    public Lock getLock() {
        return lock;
    }

    public short getFileVersion() {
        return FILE_FORMAT_VERSION_ID;
    }
}

@@ -258,25 +258,16 @@
 ge.lock.
-MultiRead
 Reentran
@@ -263,24 +263,33 @@
 ck.Reentrant
+ReadWrite
 Lock;%0Aimport
@@ -711,17 +711,8 @@
 new 
-MultiRead
 Reen
@@ -716,16 +716,25 @@
 eentrant
+ReadWrite
 Lock(Fil

Revert "Structure index: change lock to MultiReadReentrantLock"