/*
    * 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.
   */
  package org.eclipse.aether.named.providers;
  
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import java.util.concurrent.TimeUnit;
  
  import org.eclipse.aether.named.NamedLockKey;
  import org.eclipse.aether.named.support.NamedLockFactorySupport;
  import org.eclipse.aether.named.support.NamedLockSupport;
  
  /**
   * A no-op lock factory, that creates no-op locks.
   */
  @Singleton
  @Named(NoopNamedLockFactory.NAME)
  public class NoopNamedLockFactory extends NamedLockFactorySupport {
      public static final String NAME = "noop";
  
      @Override
      protected NoopNamedLock createLock(final NamedLockKey key) {
          return new NoopNamedLock(key, this);
      }
  
      private static final class NoopNamedLock extends NamedLockSupport {
          private NoopNamedLock(final NamedLockKey key, final NamedLockFactorySupport factory) {
              super(key, factory);
          }
  
          @Override
          protected boolean doLockShared(final long time, final TimeUnit unit) {
              return true;
          }
  
          @Override
          protected boolean doLockExclusively(final long time, final TimeUnit unit) {
              return true;
          }
  
          @Override
          protected void doUnlock() {
              // no-op
          }
      }
  }