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