package org.apache.lucene.store; /** * 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. */ import java.io.IOException; /** * Use this {@link LockFactory} to disable locking entirely. * This LockFactory is used when you call {@link FSDirectory#setDisableLocks}. * Only one instance of this lock is created. You should call {@link * #getNoLockFactory()} to get the instance. * * @see LockFactory */ public class NoLockFactory extends LockFactory { // Single instance returned whenever makeLock is called. private static NoLock singletonLock = new NoLock(); private static NoLockFactory singleton = new NoLockFactory(); public static NoLockFactory getNoLockFactory() { return singleton; } public Lock makeLock(String lockName) { return singletonLock; } public void clearLock(String lockName) {}; }; class NoLock extends Lock { public boolean obtain() throws IOException { return true; } public void release() { } public boolean isLocked() { return false; } public String toString() { return "NoLock"; } }