001package org.eclipse.aether.named.providers;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 *
012 *  http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022import java.util.concurrent.TimeUnit;
023
024import javax.inject.Named;
025import javax.inject.Singleton;
026
027import org.eclipse.aether.named.support.NamedLockFactorySupport;
028import org.eclipse.aether.named.support.NamedLockSupport;
029
030/**
031 * A no-op lock factory, that creates no-op locks.
032 */
033@Singleton
034@Named( NoopNamedLockFactory.NAME )
035public class NoopNamedLockFactory
036    extends NamedLockFactorySupport
037{
038  public static final String NAME = "noop";
039
040  @Override
041  protected NoopNamedLock createLock( final String name )
042  {
043    return new NoopNamedLock( name, this );
044  }
045
046  private static final class NoopNamedLock extends NamedLockSupport
047  {
048    private NoopNamedLock( final String name, final NamedLockFactorySupport factory )
049    {
050      super( name, factory );
051    }
052
053    @Override
054    public boolean lockShared( final long time, final TimeUnit unit )
055    {
056      return true;
057    }
058
059    @Override
060    public boolean lockExclusively( final long time, final TimeUnit unit )
061    {
062      return true;
063    }
064
065    @Override
066    public void unlock()
067    {
068      // no-op
069    }
070  }
071}