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package org.apache.lucene.store;
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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import java.io.IOException;
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* Use this {@link LockFactory} to disable locking entirely.
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* This LockFactory is used when you call {@link FSDirectory#setDisableLocks}.
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* Only one instance of this lock is created. You should call {@link
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* #getNoLockFactory()} to get the instance.
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public class NoLockFactory extends LockFactory {
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// Single instance returned whenever makeLock is called.
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private static NoLock singletonLock = new NoLock();
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private static NoLockFactory singleton = new NoLockFactory();
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public static NoLockFactory getNoLockFactory() {
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public Lock makeLock(String lockName) {
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public void clearLock(String lockName) {};
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class NoLock extends Lock {
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public boolean obtain() throws IOException {
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public void release() {
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public boolean isLocked() {
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public String toString() {