| 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. |
| * 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(); |
| |
| /** |
| * @deprecated This constructor was not intended to be public and should not be used. |
| * It will be made private in Lucene 4.0 |
| * @see #getNoLockFactory() |
| */ |
| // make private in 4.0! |
| @Deprecated |
| public NoLockFactory() {} |
| |
| public static NoLockFactory getNoLockFactory() { |
| return singleton; |
| } |
| |
| @Override |
| public Lock makeLock(String lockName) { |
| return singletonLock; |
| } |
| |
| @Override |
| public void clearLock(String lockName) {} |
| } |
| |
| class NoLock extends Lock { |
| @Override |
| public boolean obtain() throws IOException { |
| return true; |
| } |
| |
| @Override |
| public void release() { |
| } |
| |
| @Override |
| public boolean isLocked() { |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return "NoLock"; |
| } |
| } |