Package: CacheManager$Cache

CacheManager$Cache

Coverage

1: /*
2: * *********************************************************************************************************************
3: *
4: * blueMarine II: Semantic Media Centre
5: * http://tidalwave.it/projects/bluemarine2
6: *
7: * Copyright (C) 2015 - 2021 by Tidalwave s.a.s. (http://tidalwave.it)
8: *
9: * *********************************************************************************************************************
10: *
11: * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
12: * the License. You may obtain a copy of the License at
13: *
14: * http://www.apache.org/licenses/LICENSE-2.0
15: *
16: * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
17: * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
18: * specific language governing permissions and limitations under the License.
19: *
20: * *********************************************************************************************************************
21: *
22: * git clone https://bitbucket.org/tidalwave/bluemarine2-src
23: * git clone https://github.com/tidalwave-it/bluemarine2-src
24: *
25: * *********************************************************************************************************************
26: */
27: package it.tidalwave.bluemarine2.model.spi;
28:
29: import javax.annotation.Nonnull;
30: import java.util.function.Supplier;
31:
32: /***********************************************************************************************************************
33: *
34: * @author Fabrizio Giudici
35: *
36: **********************************************************************************************************************/
37: public interface CacheManager
38: {
39: public static interface Cache
40: {
41: /***************************************************************************************************************
42: *
43: * Retrieves an object from the cache. If it hasn't cached before, a supplier is called.
44: *
45: * @param <T> the object type
46: * @param key the object key
47: * @param supplier a supplier of a fresh instance
48: * @return the object
49: *
50: **************************************************************************************************************/
51: @Nonnull
52: public <T> T getCachedObject (@Nonnull Object key, @Nonnull Supplier<T> supplier);
53: }
54:
55: /*******************************************************************************************************************
56: *
57: * Returns the cache associated to the given key (a new cache is eventually created).
58: *
59: * @param cacheKey the key
60: * @return the cache
61: *
62: ******************************************************************************************************************/
63: @Nonnull
64: public Cache getCache (@Nonnull Object cacheKey);
65: }