NoLockFactory.cs

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/* 
 * 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.
 */

using System;

namespace Lucene.Net.Store
{
    
    /// <summary> Use this <see cref="LockFactory" /> to disable locking entirely.
    /// Only one instance of this lock is created.  You should call <see cref="Instance" />
    /// to get the instance.
    /// 
    /// </summary>
    /// <seealso cref="LockFactory">
    /// </seealso>
    
    public class NoLockFactory : LockFactory
    {
        
        // Single instance returned whenever makeLock is called.
        private static NoLock singletonLock = new NoLock();
        private static NoLockFactory singleton = new NoLockFactory();

        public static NoLockFactory Instance
        {
            get { return singleton; }
        }

        public override Lock MakeLock(System.String lockName)
        {
            return singletonLock;
        }
        
        public override void  ClearLock(System.String lockName)
        {
        }
        
    }
    
    
    class NoLock:Lock
    {
        public override bool Obtain()
        {
            return true;
        }
        
        public override void  Release()
        {
        }
        
        public override bool IsLocked()
        {
            return false;
        }
        
        public override System.String ToString()
        {
            return "NoLock";
        }
    }
}