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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2021 Nokia.
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.dcaegen2.services.pmmapper.utils;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
public enum IncomingEventsCache {
INSTANCE;
private Set<String> eventsIds = ConcurrentHashMap.newKeySet();
/**
* Gets thread safe, single instance of this enum
* @return the single instance of cache
*/
public IncomingEventsCache getInstance() {
return INSTANCE;
}
/**
* Adds publishIdentity of an event to cache
* @param id to be added to cache
*/
public void add(String id) {
eventsIds.add(id);
}
/**
* Remove publishIdentity of an event from cache
* @param id to be removed from cache
*/
public void remove(String id) {
eventsIds.remove(id);
}
/**
* Checks if the cache contains a publishIdentity
* @param id to be found in cache
* @return true when the id exists, false otherwise
*/
public boolean contains(String id) {
return eventsIds.contains(id);
}
Set<String> getCachedEvents() {
return new HashSet<>(eventsIds);
}
}
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