1 package org.eclipse.aether;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import java.util.Map;
23 import java.util.concurrent.ConcurrentHashMap;
24
25 /**
26 * A simplistic repository cache backed by a thread-safe map. The simplistic nature of this cache makes it only suitable
27 * for use with short-lived repository system sessions where pruning of cache data is not required.
28 */
29 public final class DefaultRepositoryCache
30 implements RepositoryCache
31 {
32
33 private final Map<Object, Object> cache = new ConcurrentHashMap<>( 256 );
34
35 public Object get( RepositorySystemSession session, Object key )
36 {
37 return cache.get( key );
38 }
39
40 public void put( RepositorySystemSession session, Object key, Object data )
41 {
42 if ( data != null )
43 {
44 cache.put( key, data );
45 }
46 else
47 {
48 cache.remove( key );
49 }
50 }
51
52 }