com.hazelcast.map.impl.querycache.subscriber.MapSubscriberRegistry Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2021, Hazelcast, Inc. 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.
*/
package com.hazelcast.map.impl.querycache.subscriber;
import com.hazelcast.map.IMap;
import com.hazelcast.map.impl.querycache.QueryCacheContext;
import com.hazelcast.map.impl.querycache.Registry;
import com.hazelcast.internal.util.ConstructorFunction;
import java.util.Collections;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import static com.hazelcast.internal.util.ConcurrencyUtil.getOrPutIfAbsent;
/**
* Used to register and hold {@link SubscriberRegistry} per {@link IMap IMap}.
*
* @see SubscriberRegistry
*/
public class MapSubscriberRegistry implements Registry {
private final ConstructorFunction registryConstructorFunction =
this::createSubscriberRegistry;
private final QueryCacheContext context;
private final ConcurrentMap cachePublishersPerIMap;
public MapSubscriberRegistry(QueryCacheContext context) {
this.context = context;
this.cachePublishersPerIMap = new ConcurrentHashMap<>();
}
@Override
public SubscriberRegistry getOrCreate(String mapName) {
return getOrPutIfAbsent(cachePublishersPerIMap, mapName, registryConstructorFunction);
}
@Override
public SubscriberRegistry getOrNull(String mapName) {
return cachePublishersPerIMap.get(mapName);
}
@Override
public Map getAll() {
return Collections.unmodifiableMap(cachePublishersPerIMap);
}
@Override
public SubscriberRegistry remove(String mapName) {
return cachePublishersPerIMap.remove(mapName);
}
protected SubscriberRegistry createSubscriberRegistry(String mapName) {
return new SubscriberRegistry(context, mapName);
}
protected QueryCacheContext getContext() {
return context;
}
}