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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.hazelcast;
20  
21  import com.hazelcast.core.HazelcastInstance;
22  import com.hazelcast.cp.ISemaphore;
23  import org.eclipse.aether.named.NamedLockKey;
24  
25  /**
26   * Support class for providers of {@link ISemaphore} instances.
27   */
28  public abstract class HazelcastSemaphoreProvider {
29      /**
30       * Name prefix recommended using for simpler configuration of Hazelcast.
31       */
32      protected static final String NAME_PREFIX = "maven:resolver:";
33  
34      /**
35       * Invoked when new instance of semaphore needed for given key. must not return {@code null}.
36       */
37      public abstract ISemaphore acquireSemaphore(HazelcastInstance hazelcastInstance, NamedLockKey key);
38  
39      /**
40       * Invoked when passed in semaphore associated with passed in key is not to be used anymore.
41       */
42      public abstract void releaseSemaphore(HazelcastInstance hazelcastInstance, NamedLockKey key, ISemaphore semaphore);
43  }