org.apache.jackrabbit.oak.plugins.document.locks.StripedNodeDocumentLocks Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jackrabbit.oak.plugins.document.locks;
import java.util.concurrent.locks.Lock;
import org.apache.jackrabbit.oak.plugins.document.util.Utils;
import com.google.common.util.concurrent.Striped;
public class StripedNodeDocumentLocks implements NodeDocumentLocks {
private static final String ROOT = Utils.getIdFromPath("/");
/**
* Locks to ensure cache consistency on reads, writes and invalidation.
*/
private final Striped locks = Striped.lock(4096);
private final Lock rootLock = Striped.lock(1).get(ROOT);
@Override
public Lock acquire(String key) {
Lock lock = ROOT.equals(key) ? rootLock : locks.get(key);
lock.lock();
return lock;
}
}