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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.eclipse.aether.named.providers;
20  
21  import javax.inject.Named;
22  import javax.inject.Singleton;
23  
24  import java.util.concurrent.TimeUnit;
25  
26  import org.eclipse.aether.named.support.NamedLockFactorySupport;
27  import org.eclipse.aether.named.support.NamedLockSupport;
28  
29  /**
30   * A no-op lock factory, that creates no-op locks.
31   */
32  @Singleton
33  @Named(NoopNamedLockFactory.NAME)
34  public class NoopNamedLockFactory extends NamedLockFactorySupport {
35      public static final String NAME = "noop";
36  
37      @Override
38      protected NoopNamedLock createLock(final String name) {
39          return new NoopNamedLock(name, this);
40      }
41  
42      private static final class NoopNamedLock extends NamedLockSupport {
43          private NoopNamedLock(final String name, final NamedLockFactorySupport factory) {
44              super(name, factory);
45          }
46  
47          @Override
48          protected boolean doLockShared(final long time, final TimeUnit unit) {
49              return true;
50          }
51  
52          @Override
53          protected boolean doLockExclusively(final long time, final TimeUnit unit) {
54              return true;
55          }
56  
57          @Override
58          protected void doUnlock() {
59              // no-op
60          }
61      }
62  }