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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.NamedLockKey;
27  import org.eclipse.aether.named.support.NamedLockFactorySupport;
28  import org.eclipse.aether.named.support.NamedLockSupport;
29  
30  /**
31   * A no-op lock factory, that creates no-op locks.
32   */
33  @Singleton
34  @Named(NoopNamedLockFactory.NAME)
35  public class NoopNamedLockFactory extends NamedLockFactorySupport {
36      public static final String NAME = "noop";
37  
38      @Override
39      protected NoopNamedLock createLock(final NamedLockKey key) {
40          return new NoopNamedLock(key, this);
41      }
42  
43      private static final class NoopNamedLock extends NamedLockSupport {
44          private NoopNamedLock(final NamedLockKey key, final NamedLockFactorySupport factory) {
45              super(key, factory);
46          }
47  
48          @Override
49          protected boolean doLockShared(final long time, final TimeUnit unit) {
50              return true;
51          }
52  
53          @Override
54          protected boolean doLockExclusively(final long time, final TimeUnit unit) {
55              return true;
56          }
57  
58          @Override
59          protected void doUnlock() {
60              // no-op
61          }
62      }
63  }