2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2017 - 2019 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
21 package org.onap.vid.aai.util;
23 import java.util.List;
24 import java.util.function.Function;
25 import java.util.stream.Collectors;
26 import java.util.stream.Stream;
28 import static org.apache.commons.lang3.ObjectUtils.defaultIfNull;
30 public interface CacheProvider {
31 String KEY_DELIMITER = "!@#'";
33 Returns the cache associated with given name; creates one if wasn't any
35 <K, V> Cache<K, V> aaiClientCacheFor(String name, Function<K, V> loader);
38 reset cache if exist. Otherwise do nothing
40 void resetCache(String name);
42 interface Cache<K, V> {
46 static String compileKey(List<String> args) {
47 return compileKey(args.toArray(new String[0]));
50 static String compileKey(String... args) {
51 return Stream.of(args).map(arg->defaultIfNull(arg, "")).collect( Collectors.joining( KEY_DELIMITER ) );
54 static String[] decompileKey(String key) {
55 return key.split(KEY_DELIMITER);